TY  - JOUR
AU  - Veličković, Luka
AU  - Simović, Ana
AU  - Gligorijević, Nikola
AU  - Thureau, Aurélien
AU  - Obradović, Milica
AU  - Vasović, Tamara
AU  - Sotiroudis, Georgios
AU  - Zoumpanioti, Maria
AU  - Brûlet, Annie
AU  - Ćirković-Veličković, Tanja
AU  - Combet, Sophie
AU  - Nikolić, Milan
AU  - Minić, Simeon
PY  - 2023
UR  - http://cherry.chem.bg.ac.rs/handle/123456789/6273
AB  - This study aimed to purify, characterise and stabilise the natural food colourant, R-phycocyanin (R-PC), from the red algae Porphyra spp. (Nori). We purified R-PC from dried Nori flakes with a high purity ratio (A618/A280 ≥ 3.4) in native form (α-helix content 53%). SAXS measurements revealed that R-PC is trimeric ((αβ)3) in solution. The thermal denaturation of α-helix revealed one transition (Tm at 52 °C), while the pH stability study showed R-PC is stable in the pH range 4–8. The thermal treatment of R-PC at 60 °C has detrimental and irreversible effects on R-PC colour and antioxidant capacity (22 % of residual capacity). However, immobilisation of R-PC within calcium alginate beads completely preserves R-PC colour and mainly retains its antioxidant ability (78 % of residual capacity). Results give new insights into the stability of R-PC and preservation of its purple colour and bioactivity by encapsulation in calcium alginate beads.
PB  - Elsevier
T2  - Food Chemistry
T1  - Exploring and strengthening the potential of R-phycocyanin from Nori flakes as a food colourant
VL  - 426
SP  - 136669
DO  - 10.1016/j.foodchem.2023.136669
ER  - 

@article{
author = "Veličković, Luka and Simović, Ana and Gligorijević, Nikola and Thureau, Aurélien and Obradović, Milica and Vasović, Tamara and Sotiroudis, Georgios and Zoumpanioti, Maria and Brûlet, Annie and Ćirković-Veličković, Tanja and Combet, Sophie and Nikolić, Milan and Minić, Simeon",
year = "2023",
abstract = "This study aimed to purify, characterise and stabilise the natural food colourant, R-phycocyanin (R-PC), from the red algae Porphyra spp. (Nori). We purified R-PC from dried Nori flakes with a high purity ratio (A618/A280 ≥ 3.4) in native form (α-helix content 53%). SAXS measurements revealed that R-PC is trimeric ((αβ)3) in solution. The thermal denaturation of α-helix revealed one transition (Tm at 52 °C), while the pH stability study showed R-PC is stable in the pH range 4–8. The thermal treatment of R-PC at 60 °C has detrimental and irreversible effects on R-PC colour and antioxidant capacity (22 % of residual capacity). However, immobilisation of R-PC within calcium alginate beads completely preserves R-PC colour and mainly retains its antioxidant ability (78 % of residual capacity). Results give new insights into the stability of R-PC and preservation of its purple colour and bioactivity by encapsulation in calcium alginate beads.",
publisher = "Elsevier",
journal = "Food Chemistry",
title = "Exploring and strengthening the potential of R-phycocyanin from Nori flakes as a food colourant",
volume = "426",
pages = "136669",
doi = "10.1016/j.foodchem.2023.136669"
}

Veličković, L., Simović, A., Gligorijević, N., Thureau, A., Obradović, M., Vasović, T., Sotiroudis, G., Zoumpanioti, M., Brûlet, A., Ćirković-Veličković, T., Combet, S., Nikolić, M.,& Minić, S.. (2023). Exploring and strengthening the potential of R-phycocyanin from Nori flakes as a food colourant. in Food Chemistry
Elsevier., 426, 136669.
https://doi.org/10.1016/j.foodchem.2023.136669

Veličković L, Simović A, Gligorijević N, Thureau A, Obradović M, Vasović T, Sotiroudis G, Zoumpanioti M, Brûlet A, Ćirković-Veličković T, Combet S, Nikolić M, Minić S. Exploring and strengthening the potential of R-phycocyanin from Nori flakes as a food colourant. in Food Chemistry. 2023;426:136669.
doi:10.1016/j.foodchem.2023.136669 .

Veličković, Luka, Simović, Ana, Gligorijević, Nikola, Thureau, Aurélien, Obradović, Milica, Vasović, Tamara, Sotiroudis, Georgios, Zoumpanioti, Maria, Brûlet, Annie, Ćirković-Veličković, Tanja, Combet, Sophie, Nikolić, Milan, Minić, Simeon, "Exploring and strengthening the potential of R-phycocyanin from Nori flakes as a food colourant" in Food Chemistry, 426 (2023):136669,
https://doi.org/10.1016/j.foodchem.2023.136669 . .

TY  - CONF
AU  - Simović, Ana
AU  - Bićanin, Maša
AU  - Radomirović, Mirjana Ž.
AU  - Aćimovič, Jelena
AU  - Mitić, Dragana
AU  - Stanić-Vučinić, Dragana
AU  - Ćirković-Veličković, Tanja
PY  - 2023
UR  - http://cherry.chem.bg.ac.rs/handle/123456789/6418
AB  - The emergence of the novel coronavirus SARS-CoV-2 has attracted the attention of the whole scientific community. However, as there are significant concerns regarding the effectiveness of vaccines and drugs against novel SARS-CoV-2 variants, naturally derived broad-spectrum of antivirals seems to be precious adjuvant agents to assist in combat against this disease. Phycocyanobilin (PCB) is an open-chain tetrapyrrole chromophore of phycocyanin (PC), chromoprotein derived from Spirullina, with strong anti-oxidative action. The role of disulfide bonds and thiol-disulfide balance in RBD is considered to play a significant role in the binding of S protein to ACE2 receptor. In RBD, in contrast to C480–C488 disulfide, which is thermodynamically stable, C379–C432 and C391–C525 disulfides are in dynamic equilibrium with their thiol states and, thus these two pairs of disulfides are more sensitive to changes in redox poise. Our study aimed to investigate impact of PCB on disulfide balance of RBD by redox proteomics and to investigate structural changes in the protein exposed to PCB. The effect of PCB on RBD secondary structures was examined by far-UV CD spectroscopy after titration of RBD with increasing concentrations of PCB. The presence of PCB had a pronounced effect on the spectral shape. RBD is dominantly composed of random coils and β-sheets. In the presence of PCB a slight increase of α-helical and random coils content, while the content of β-sheets and β-turns is decreased. Mapping redox-active disulfides and reactive cysteines in recombinant SARS-CoV-2 RBD was done using redox proteomics on both recombinant RBD and PCB-exposed RBD. A mass shift caused by alkylation of free Cys residues was detected on three Cys residues demonstrating disulfides C379–C432 and 432-391 to be semi-stable in both RBD and PCB-exposed RBD. Our results demonstrate that RBD exposed to PCB undergo structural changes but does not change the redox state of its critical semi-stable disulfides.
Acknowledgment: The authors acknowledge support of the special Research Fund (BOF) of Ghent University (grant number 01N01718) and the Ministry of Science, Innovation and technological development of the Republic of Serbia (Contract number: 451-03-68/2023-14/200168).
PB  - Italian Proteomics Association
C3  - ItPA HPS and SePA XVII International Congress: Proteomics and Metabolomics towards Global Health, November 29th – December 1st, 2023, Roma, Italy
T1  - Redox status of critical disulfides of SARS-CoV-2 receptor-binding-domain exposed to bioactive chomophore phycocyanobilin
SP  - 63
EP  - 63
UR  - https://hdl.handle.net/21.15107/rcub_cherry_6418
ER  - 

@conference{
author = "Simović, Ana and Bićanin, Maša and Radomirović, Mirjana Ž. and Aćimovič, Jelena and Mitić, Dragana and Stanić-Vučinić, Dragana and Ćirković-Veličković, Tanja",
year = "2023",
abstract = "The emergence of the novel coronavirus SARS-CoV-2 has attracted the attention of the whole scientific community. However, as there are significant concerns regarding the effectiveness of vaccines and drugs against novel SARS-CoV-2 variants, naturally derived broad-spectrum of antivirals seems to be precious adjuvant agents to assist in combat against this disease. Phycocyanobilin (PCB) is an open-chain tetrapyrrole chromophore of phycocyanin (PC), chromoprotein derived from Spirullina, with strong anti-oxidative action. The role of disulfide bonds and thiol-disulfide balance in RBD is considered to play a significant role in the binding of S protein to ACE2 receptor. In RBD, in contrast to C480–C488 disulfide, which is thermodynamically stable, C379–C432 and C391–C525 disulfides are in dynamic equilibrium with their thiol states and, thus these two pairs of disulfides are more sensitive to changes in redox poise. Our study aimed to investigate impact of PCB on disulfide balance of RBD by redox proteomics and to investigate structural changes in the protein exposed to PCB. The effect of PCB on RBD secondary structures was examined by far-UV CD spectroscopy after titration of RBD with increasing concentrations of PCB. The presence of PCB had a pronounced effect on the spectral shape. RBD is dominantly composed of random coils and β-sheets. In the presence of PCB a slight increase of α-helical and random coils content, while the content of β-sheets and β-turns is decreased. Mapping redox-active disulfides and reactive cysteines in recombinant SARS-CoV-2 RBD was done using redox proteomics on both recombinant RBD and PCB-exposed RBD. A mass shift caused by alkylation of free Cys residues was detected on three Cys residues demonstrating disulfides C379–C432 and 432-391 to be semi-stable in both RBD and PCB-exposed RBD. Our results demonstrate that RBD exposed to PCB undergo structural changes but does not change the redox state of its critical semi-stable disulfides.
Acknowledgment: The authors acknowledge support of the special Research Fund (BOF) of Ghent University (grant number 01N01718) and the Ministry of Science, Innovation and technological development of the Republic of Serbia (Contract number: 451-03-68/2023-14/200168).",
publisher = "Italian Proteomics Association",
journal = "ItPA HPS and SePA XVII International Congress: Proteomics and Metabolomics towards Global Health, November 29th – December 1st, 2023, Roma, Italy",
title = "Redox status of critical disulfides of SARS-CoV-2 receptor-binding-domain exposed to bioactive chomophore phycocyanobilin",
pages = "63-63",
url = "https://hdl.handle.net/21.15107/rcub_cherry_6418"
}

Simović, A., Bićanin, M., Radomirović, M. Ž., Aćimovič, J., Mitić, D., Stanić-Vučinić, D.,& Ćirković-Veličković, T.. (2023). Redox status of critical disulfides of SARS-CoV-2 receptor-binding-domain exposed to bioactive chomophore phycocyanobilin. in ItPA HPS and SePA XVII International Congress: Proteomics and Metabolomics towards Global Health, November 29th – December 1st, 2023, Roma, Italy
Italian Proteomics Association., 63-63.
https://hdl.handle.net/21.15107/rcub_cherry_6418

Simović A, Bićanin M, Radomirović MŽ, Aćimovič J, Mitić D, Stanić-Vučinić D, Ćirković-Veličković T. Redox status of critical disulfides of SARS-CoV-2 receptor-binding-domain exposed to bioactive chomophore phycocyanobilin. in ItPA HPS and SePA XVII International Congress: Proteomics and Metabolomics towards Global Health, November 29th – December 1st, 2023, Roma, Italy. 2023;:63-63.
https://hdl.handle.net/21.15107/rcub_cherry_6418 .

Simović, Ana, Bićanin, Maša, Radomirović, Mirjana Ž., Aćimovič, Jelena, Mitić, Dragana, Stanić-Vučinić, Dragana, Ćirković-Veličković, Tanja, "Redox status of critical disulfides of SARS-CoV-2 receptor-binding-domain exposed to bioactive chomophore phycocyanobilin" in ItPA HPS and SePA XVII International Congress: Proteomics and Metabolomics towards Global Health, November 29th – December 1st, 2023, Roma, Italy (2023):63-63,
https://hdl.handle.net/21.15107/rcub_cherry_6418 .

TY  - JOUR
AU  - Veličković, Luka
AU  - Simović, Ana
AU  - Gligorijević, Nikola
AU  - Thureau, Aurelien
AU  - Obradović, Milica
AU  - Vasović, Tamara
AU  - Sotiroudis, Georgios
AU  - Zoumpanioti, Maria
AU  - Brûlet, Annie
AU  - Ćirković-Veličković, Tanja
AU  - Combet, Sophie
AU  - Nikolić, Milan
AU  - Minić, Simeon
PY  - 2023
UR  - http://cherry.chem.bg.ac.rs/handle/123456789/6420
AB  - This study aimed to purify, characterise and stabilise the natural food colourant, R-phycocyanin (R-PC), from thered algae Porphyra spp. (Nori). We purified R-PC from dried Nori flakes with a high purity ratio (A618/A280 ≥ 3.4)in native form (α-helix content 53%). SAXS measurements revealed that R-PC is trimeric ((αβ)3) in solution. Thethermal denaturation of α-helix revealed one transition (Tm at 52 ◦C), while the pH stability study showed R-PC isstable in the pH range 4–8. The thermal treatment of R-PC at 60 ◦C has detrimental and irreversible effects on RPCcolour and antioxidant capacity (22 % of residual capacity). However, immobilisation of R-PC within calciumalginate beads completely preserves R-PC colour and mainly retains its antioxidant ability (78 % of residualcapacity). Results give new insights into the stability of R-PC and preservation of its purple colour and bioactivityby encapsulation in calcium alginate beads.
PB  - Elsevier
T2  - Food Chemistry
T1  - Exploring and strengthening the potential of R-phycocyanin from Nori flakes as a food colourant
VL  - 426
SP  - 136669
DO  - 10.1016/j.foodchem.2023.136669
ER  - 

@article{
author = "Veličković, Luka and Simović, Ana and Gligorijević, Nikola and Thureau, Aurelien and Obradović, Milica and Vasović, Tamara and Sotiroudis, Georgios and Zoumpanioti, Maria and Brûlet, Annie and Ćirković-Veličković, Tanja and Combet, Sophie and Nikolić, Milan and Minić, Simeon",
year = "2023",
abstract = "This study aimed to purify, characterise and stabilise the natural food colourant, R-phycocyanin (R-PC), from thered algae Porphyra spp. (Nori). We purified R-PC from dried Nori flakes with a high purity ratio (A618/A280 ≥ 3.4)in native form (α-helix content 53%). SAXS measurements revealed that R-PC is trimeric ((αβ)3) in solution. Thethermal denaturation of α-helix revealed one transition (Tm at 52 ◦C), while the pH stability study showed R-PC isstable in the pH range 4–8. The thermal treatment of R-PC at 60 ◦C has detrimental and irreversible effects on RPCcolour and antioxidant capacity (22 % of residual capacity). However, immobilisation of R-PC within calciumalginate beads completely preserves R-PC colour and mainly retains its antioxidant ability (78 % of residualcapacity). Results give new insights into the stability of R-PC and preservation of its purple colour and bioactivityby encapsulation in calcium alginate beads.",
publisher = "Elsevier",
journal = "Food Chemistry",
title = "Exploring and strengthening the potential of R-phycocyanin from Nori flakes as a food colourant",
volume = "426",
pages = "136669",
doi = "10.1016/j.foodchem.2023.136669"
}

Veličković, L., Simović, A., Gligorijević, N., Thureau, A., Obradović, M., Vasović, T., Sotiroudis, G., Zoumpanioti, M., Brûlet, A., Ćirković-Veličković, T., Combet, S., Nikolić, M.,& Minić, S.. (2023). Exploring and strengthening the potential of R-phycocyanin from Nori flakes as a food colourant. in Food Chemistry
Elsevier., 426, 136669.
https://doi.org/10.1016/j.foodchem.2023.136669

Veličković L, Simović A, Gligorijević N, Thureau A, Obradović M, Vasović T, Sotiroudis G, Zoumpanioti M, Brûlet A, Ćirković-Veličković T, Combet S, Nikolić M, Minić S. Exploring and strengthening the potential of R-phycocyanin from Nori flakes as a food colourant. in Food Chemistry. 2023;426:136669.
doi:10.1016/j.foodchem.2023.136669 .

Veličković, Luka, Simović, Ana, Gligorijević, Nikola, Thureau, Aurelien, Obradović, Milica, Vasović, Tamara, Sotiroudis, Georgios, Zoumpanioti, Maria, Brûlet, Annie, Ćirković-Veličković, Tanja, Combet, Sophie, Nikolić, Milan, Minić, Simeon, "Exploring and strengthening the potential of R-phycocyanin from Nori flakes as a food colourant" in Food Chemistry, 426 (2023):136669,
https://doi.org/10.1016/j.foodchem.2023.136669 . .

TY  - JOUR
AU  - Mladenović Stokanić, Maja
AU  - Simović, Ana
AU  - Jovanović, Vesna B.
AU  - Radomirović, Mirjana
AU  - Udovićki, Božidar
AU  - Krstić Ristivojević, Maja
AU  - Đukić, Teodora
AU  - Vasović, Tamara
AU  - Aćimović, Jelena
AU  - Sabljić, Ljiljana
AU  - Lukić, Ivana
AU  - Kovačević, Ana
AU  - Cujić, Danica
AU  - Gnjatović, Marija
AU  - Smiljanić, Katarina
AU  - Stojadinović, Marija
AU  - Radosavljević, Jelena
AU  - Stanić-Vučinić, Dragana
AU  - Stojanović, Marijana
AU  - Rajković, Andreja
AU  - Ćirković-Veličković, Tanja
PY  - 2023
UR  - http://cherry.chem.bg.ac.rs/handle/123456789/6436
AB  - In this study, a cost-effective sandwich ELISA test, based on polyclonal antibodies, for routine quantification SARS-CoV-2 nucleocapsid (N) protein was developed. The recombinant N protein was produced and used for the production of mice and rabbit antisera. Polyclonal N protein-specific antibodies served as capture and detection antibodies. The prototype ELISA has LOD 0.93 ng/mL and LOQ 5.3 ng/mL, with a linear range of 1.52–48.83 ng/mL. N protein heat pretreatment (56 °C, 1 h) decreased, while pretreatment with 1% Triton X-100 increased analytical ELISA sensitivity. The diagnostic specificity of ELISA was 100% (95% CI, 91.19–100.00%) and sensitivity was 52.94% (95% CI, 35.13–70.22%) compared to rtRT-PCR (Ct < 40). Profoundly higher sensitivity was obtained using patient samples mostly containing Wuhan-similar variants (Wuhan, alpha, and delta), 62.50% (95% CI, 40.59 to 81.20%), in comparison to samples mostly containing Wuhan-distant variants (Omicron) 30.00% (6.67–65.25%). The developed product has relatively high diagnostic sensitivity in relation to its analytical sensitivity due to the usage of polyclonal antibodies from two species, providing a wide repertoire of antibodies against multiple N protein epitopes. Moreover, the fast, simple, and inexpensive production of polyclonal antibodies, as the most expensive assay components, would result in affordable antigen tests.
PB  - MDPI
T2  - International Journal of Molecular Sciences
T1  - Sandwich ELISA for the Quantification of Nucleocapsid Protein of SARS-CoV-2 Based on Polyclonal Antibodies from Two Different Species
VL  - 25
IS  - 1
SP  - 333
DO  - 10.3390/ijms25010333
ER  - 

@article{
author = "Mladenović Stokanić, Maja and Simović, Ana and Jovanović, Vesna B. and Radomirović, Mirjana and Udovićki, Božidar and Krstić Ristivojević, Maja and Đukić, Teodora and Vasović, Tamara and Aćimović, Jelena and Sabljić, Ljiljana and Lukić, Ivana and Kovačević, Ana and Cujić, Danica and Gnjatović, Marija and Smiljanić, Katarina and Stojadinović, Marija and Radosavljević, Jelena and Stanić-Vučinić, Dragana and Stojanović, Marijana and Rajković, Andreja and Ćirković-Veličković, Tanja",
year = "2023",
abstract = "In this study, a cost-effective sandwich ELISA test, based on polyclonal antibodies, for routine quantification SARS-CoV-2 nucleocapsid (N) protein was developed. The recombinant N protein was produced and used for the production of mice and rabbit antisera. Polyclonal N protein-specific antibodies served as capture and detection antibodies. The prototype ELISA has LOD 0.93 ng/mL and LOQ 5.3 ng/mL, with a linear range of 1.52–48.83 ng/mL. N protein heat pretreatment (56 °C, 1 h) decreased, while pretreatment with 1% Triton X-100 increased analytical ELISA sensitivity. The diagnostic specificity of ELISA was 100% (95% CI, 91.19–100.00%) and sensitivity was 52.94% (95% CI, 35.13–70.22%) compared to rtRT-PCR (Ct < 40). Profoundly higher sensitivity was obtained using patient samples mostly containing Wuhan-similar variants (Wuhan, alpha, and delta), 62.50% (95% CI, 40.59 to 81.20%), in comparison to samples mostly containing Wuhan-distant variants (Omicron) 30.00% (6.67–65.25%). The developed product has relatively high diagnostic sensitivity in relation to its analytical sensitivity due to the usage of polyclonal antibodies from two species, providing a wide repertoire of antibodies against multiple N protein epitopes. Moreover, the fast, simple, and inexpensive production of polyclonal antibodies, as the most expensive assay components, would result in affordable antigen tests.",
publisher = "MDPI",
journal = "International Journal of Molecular Sciences",
title = "Sandwich ELISA for the Quantification of Nucleocapsid Protein of SARS-CoV-2 Based on Polyclonal Antibodies from Two Different Species",
volume = "25",
number = "1",
pages = "333",
doi = "10.3390/ijms25010333"
}

Mladenović Stokanić, M., Simović, A., Jovanović, V. B., Radomirović, M., Udovićki, B., Krstić Ristivojević, M., Đukić, T., Vasović, T., Aćimović, J., Sabljić, L., Lukić, I., Kovačević, A., Cujić, D., Gnjatović, M., Smiljanić, K., Stojadinović, M., Radosavljević, J., Stanić-Vučinić, D., Stojanović, M., Rajković, A.,& Ćirković-Veličković, T.. (2023). Sandwich ELISA for the Quantification of Nucleocapsid Protein of SARS-CoV-2 Based on Polyclonal Antibodies from Two Different Species. in International Journal of Molecular Sciences
MDPI., 25(1), 333.
https://doi.org/10.3390/ijms25010333

Mladenović Stokanić M, Simović A, Jovanović VB, Radomirović M, Udovićki B, Krstić Ristivojević M, Đukić T, Vasović T, Aćimović J, Sabljić L, Lukić I, Kovačević A, Cujić D, Gnjatović M, Smiljanić K, Stojadinović M, Radosavljević J, Stanić-Vučinić D, Stojanović M, Rajković A, Ćirković-Veličković T. Sandwich ELISA for the Quantification of Nucleocapsid Protein of SARS-CoV-2 Based on Polyclonal Antibodies from Two Different Species. in International Journal of Molecular Sciences. 2023;25(1):333.
doi:10.3390/ijms25010333 .

Mladenović Stokanić, Maja, Simović, Ana, Jovanović, Vesna B., Radomirović, Mirjana, Udovićki, Božidar, Krstić Ristivojević, Maja, Đukić, Teodora, Vasović, Tamara, Aćimović, Jelena, Sabljić, Ljiljana, Lukić, Ivana, Kovačević, Ana, Cujić, Danica, Gnjatović, Marija, Smiljanić, Katarina, Stojadinović, Marija, Radosavljević, Jelena, Stanić-Vučinić, Dragana, Stojanović, Marijana, Rajković, Andreja, Ćirković-Veličković, Tanja, "Sandwich ELISA for the Quantification of Nucleocapsid Protein of SARS-CoV-2 Based on Polyclonal Antibodies from Two Different Species" in International Journal of Molecular Sciences, 25, no. 1 (2023):333,
https://doi.org/10.3390/ijms25010333 . .

TY  - GEN
AU  - Ćirković-Veličković, Tanja
AU  - Gnjatović, Marija
AU  - Ćujić, Danica
AU  - Todorović, Aleksandra
AU  - Stanić-Vučinić, Dragana
AU  - Đukić, Teodora
AU  - Mladenović, Maja
AU  - Vasović, Tamara
AU  - Stojadinović, Marija
AU  - Krstić-Ristivojević, Maja
AU  - Jovanović, Vesna
AU  - Simović, Ana
AU  - Radosavljević, Jelena
AU  - Aćimović, Jelena M.
AU  - Radomirović, Mirjana Ž.
AU  - Stojanović, Marijana
PY  - 2023
UR  - http://cherry.chem.bg.ac.rs/handle/123456789/6014
AB  - Нови корона вирус (SARS CoV-2) који се појавио у Вухану 2019. године припада групи једноланчаних РНК вируса [1]. Представља нови инфективни агенс за хуману популацију и веома је брзо детектован у великом броју земаља. Узрочник је респираторних инфекција које могу да буду праћене и веома тешком клиничком сликом. Брзо ширење, одсуство имунитета на овај вирус и одсуство поузданих тестова за детекцију вируса у тренутку избијања пандемије су болест изазвану овим вирусом брзо претворили у здравствени и друштвени проблем највишег приоритета на глобалном нивоу. Иако су највеће биотехнолошке компаније убрзано почеле са развојем и масовном производњом дијагностичких тестова и вакцина, њихова доступност у тренуцима највеће потражње је и даље недовољна, а цене истих су лимитирајући фактор за бољу контролу болести и ширења пандемије [2]. Развој сопствених и одржива производња тестова и вакцина за COVID-19 су од великог друштвеног значаја. Важан предуслов за одрживу производњу тестова је доступност рекомбинантних антигена вируса и могућност производње истих на великој скали за потребе производње домаћих тестова. Овим техничким решењем се описује добијање два кључна антигена новог корона вируса рекомбинантном технологијом и њихова примена у серолошком ЕЛИСА тесту који производи Институт за примену нуклеарне енергије, ИНЕП, као и за добијање реагенаса за детекцију антигена новог корона вируса (специфичних антитела). У првој фази, оптимизоване су секвенце протеина које су подигле осетљивост постојећих серолошких тестова. Иновативност нашег приступа се огледа и у разрађеним експерименталним протоколима за добијање рекомбинантних протеина нуклеокапсида на великој скали, као и у солубилној форми, што олакшава поступак пречишћавања. Избор фрагмента нуклеокапсида који се хетеролого експримира у солубилној форми, а специфично детектује антитела и генерише јак имуни одговор током имунизације животиња (имуногеност) на основу прегледа познатих епитопских секвенци је кључна иновација овог техничког решења. Ово је први пример успешно примењеног рекомбинатног протеина произведеног у Србији у дијагностичком тесту који је регистрован
код Агенције за лекове и медицинска средства Републике Србије (број решења 515-02-02370-21-002), а који је примену нашао и на међународном нивоу.
T1  - Dobijanje rekombinantnog imunogenog fragmenta proteina nukleokapsida SARS-CoV-2 virusa za proizvodnju reagenasa i dijagnostičkih testova na novi korona virus
UR  - https://hdl.handle.net/21.15107/rcub_cherry_6014
ER  - 

@misc{
author = "Ćirković-Veličković, Tanja and Gnjatović, Marija and Ćujić, Danica and Todorović, Aleksandra and Stanić-Vučinić, Dragana and Đukić, Teodora and Mladenović, Maja and Vasović, Tamara and Stojadinović, Marija and Krstić-Ristivojević, Maja and Jovanović, Vesna and Simović, Ana and Radosavljević, Jelena and Aćimović, Jelena M. and Radomirović, Mirjana Ž. and Stojanović, Marijana",
year = "2023",
abstract = "Нови корона вирус (SARS CoV-2) који се појавио у Вухану 2019. године припада групи једноланчаних РНК вируса [1]. Представља нови инфективни агенс за хуману популацију и веома је брзо детектован у великом броју земаља. Узрочник је респираторних инфекција које могу да буду праћене и веома тешком клиничком сликом. Брзо ширење, одсуство имунитета на овај вирус и одсуство поузданих тестова за детекцију вируса у тренутку избијања пандемије су болест изазвану овим вирусом брзо претворили у здравствени и друштвени проблем највишег приоритета на глобалном нивоу. Иако су највеће биотехнолошке компаније убрзано почеле са развојем и масовном производњом дијагностичких тестова и вакцина, њихова доступност у тренуцима највеће потражње је и даље недовољна, а цене истих су лимитирајући фактор за бољу контролу болести и ширења пандемије [2]. Развој сопствених и одржива производња тестова и вакцина за COVID-19 су од великог друштвеног значаја. Важан предуслов за одрживу производњу тестова је доступност рекомбинантних антигена вируса и могућност производње истих на великој скали за потребе производње домаћих тестова. Овим техничким решењем се описује добијање два кључна антигена новог корона вируса рекомбинантном технологијом и њихова примена у серолошком ЕЛИСА тесту који производи Институт за примену нуклеарне енергије, ИНЕП, као и за добијање реагенаса за детекцију антигена новог корона вируса (специфичних антитела). У првој фази, оптимизоване су секвенце протеина које су подигле осетљивост постојећих серолошких тестова. Иновативност нашег приступа се огледа и у разрађеним експерименталним протоколима за добијање рекомбинантних протеина нуклеокапсида на великој скали, као и у солубилној форми, што олакшава поступак пречишћавања. Избор фрагмента нуклеокапсида који се хетеролого експримира у солубилној форми, а специфично детектује антитела и генерише јак имуни одговор током имунизације животиња (имуногеност) на основу прегледа познатих епитопских секвенци је кључна иновација овог техничког решења. Ово је први пример успешно примењеног рекомбинатног протеина произведеног у Србији у дијагностичком тесту који је регистрован
код Агенције за лекове и медицинска средства Републике Србије (број решења 515-02-02370-21-002), а који је примену нашао и на међународном нивоу.",
title = "Dobijanje rekombinantnog imunogenog fragmenta proteina nukleokapsida SARS-CoV-2 virusa za proizvodnju reagenasa i dijagnostičkih testova na novi korona virus",
url = "https://hdl.handle.net/21.15107/rcub_cherry_6014"
}

Ćirković-Veličković, T., Gnjatović, M., Ćujić, D., Todorović, A., Stanić-Vučinić, D., Đukić, T., Mladenović, M., Vasović, T., Stojadinović, M., Krstić-Ristivojević, M., Jovanović, V., Simović, A., Radosavljević, J., Aćimović, J. M., Radomirović, M. Ž.,& Stojanović, M.. (2023). Dobijanje rekombinantnog imunogenog fragmenta proteina nukleokapsida SARS-CoV-2 virusa za proizvodnju reagenasa i dijagnostičkih testova na novi korona virus. .
https://hdl.handle.net/21.15107/rcub_cherry_6014

Ćirković-Veličković T, Gnjatović M, Ćujić D, Todorović A, Stanić-Vučinić D, Đukić T, Mladenović M, Vasović T, Stojadinović M, Krstić-Ristivojević M, Jovanović V, Simović A, Radosavljević J, Aćimović JM, Radomirović MŽ, Stojanović M. Dobijanje rekombinantnog imunogenog fragmenta proteina nukleokapsida SARS-CoV-2 virusa za proizvodnju reagenasa i dijagnostičkih testova na novi korona virus. 2023;.
https://hdl.handle.net/21.15107/rcub_cherry_6014 .

Ćirković-Veličković, Tanja, Gnjatović, Marija, Ćujić, Danica, Todorović, Aleksandra, Stanić-Vučinić, Dragana, Đukić, Teodora, Mladenović, Maja, Vasović, Tamara, Stojadinović, Marija, Krstić-Ristivojević, Maja, Jovanović, Vesna, Simović, Ana, Radosavljević, Jelena, Aćimović, Jelena M., Radomirović, Mirjana Ž., Stojanović, Marijana, "Dobijanje rekombinantnog imunogenog fragmenta proteina nukleokapsida SARS-CoV-2 virusa za proizvodnju reagenasa i dijagnostičkih testova na novi korona virus" (2023),
https://hdl.handle.net/21.15107/rcub_cherry_6014 .

TY  - CONF
AU  - Veličković, Luka
AU  - Simović, Ana
AU  - Gligorijević, Nikola
AU  - Obradović, Milica
AU  - Sotiroudis, Georgios
AU  - Zoumpanioti, Maria
AU  - Minić, Simeon
AU  - Nikolić, Milan
PY  - 2023
UR  - http://cherry.chem.bg.ac.rs/handle/123456789/6315
AB  - Purple R-phycocyanin is a protein from red algae with the potential for application in the food industry (colorant) and wastewater treatment (binding of heavy metals). Analytical grade R-phycocyanin was purified from the buffered extract of dried Nori flakes (Porphyra spp.) by combining ammonium sulfate precipitation, hydroxyapatite, and DEAE-Sepharose column chromatography. The multimeric protein had absorption maxima characteristic for phycoerythrobilin (at 580 nm) and phycocyanobilin (at 640 nm) chromophores, high α- helical content, and melting temperature of 52°C. The secondary R-PC structure was stable under a wide range of pH values (3–9). R-phycocyanin immobilized in calcium alginate beads showed increased thermal stability and preserved antioxidant activity.
AB  - Ljubičasti R-fikocijanin je protein crvenih algi sa mogućnostima primene u industriji hrane (kolorant) i za tretman otpadnih voda (vezuje teške metale). R-fikocijanin analitičke čistoće je izolovan iz puferisanog ekstrakta osušenih Nori algi (Porphyra spp.), kombinacijom taloženja amonijum-sulfatom, hidroksiapatitne i hromatografije na DEAE-Sepharose koloni. Multimerni protein imao je apsorpcione maksimume karakteristične za fikoeritrobilinsku (na 580 nm) i fikocijanobilinsku (na 640 nm) hromoforu, visok sadržaj α-zavojnica i temperaturu topljenja od 52°C. Sekundarna struktura proteina bila je stabilna u širokom rasponu pH vrednosti (3–9). R-fikocijanin imobilisan u kuglice kalcijum-alginata pokazao je povećanu toplotnu stabilnost i očuvana antioksidativna svojstva.
PB  - Belgrade : Serbian Chemical Society
C3  - 59th Meeting of the Serbian Chemical Society, Book of Abstracts, June 1-2, 2023, Novi Sad, Serbia
T1  - Purification and structural characterization of R-phycocyanin
T1  - Prečišćavanje i strukturna karakterizacija R-fikocijanina
SP  - 53
EP  - 53
UR  - https://hdl.handle.net/21.15107/rcub_cherry_6315
ER  - 

@conference{
author = "Veličković, Luka and Simović, Ana and Gligorijević, Nikola and Obradović, Milica and Sotiroudis, Georgios and Zoumpanioti, Maria and Minić, Simeon and Nikolić, Milan",
year = "2023",
abstract = "Purple R-phycocyanin is a protein from red algae with the potential for application in the food industry (colorant) and wastewater treatment (binding of heavy metals). Analytical grade R-phycocyanin was purified from the buffered extract of dried Nori flakes (Porphyra spp.) by combining ammonium sulfate precipitation, hydroxyapatite, and DEAE-Sepharose column chromatography. The multimeric protein had absorption maxima characteristic for phycoerythrobilin (at 580 nm) and phycocyanobilin (at 640 nm) chromophores, high α- helical content, and melting temperature of 52°C. The secondary R-PC structure was stable under a wide range of pH values (3–9). R-phycocyanin immobilized in calcium alginate beads showed increased thermal stability and preserved antioxidant activity., Ljubičasti R-fikocijanin je protein crvenih algi sa mogućnostima primene u industriji hrane (kolorant) i za tretman otpadnih voda (vezuje teške metale). R-fikocijanin analitičke čistoće je izolovan iz puferisanog ekstrakta osušenih Nori algi (Porphyra spp.), kombinacijom taloženja amonijum-sulfatom, hidroksiapatitne i hromatografije na DEAE-Sepharose koloni. Multimerni protein imao je apsorpcione maksimume karakteristične za fikoeritrobilinsku (na 580 nm) i fikocijanobilinsku (na 640 nm) hromoforu, visok sadržaj α-zavojnica i temperaturu topljenja od 52°C. Sekundarna struktura proteina bila je stabilna u širokom rasponu pH vrednosti (3–9). R-fikocijanin imobilisan u kuglice kalcijum-alginata pokazao je povećanu toplotnu stabilnost i očuvana antioksidativna svojstva.",
publisher = "Belgrade : Serbian Chemical Society",
journal = "59th Meeting of the Serbian Chemical Society, Book of Abstracts, June 1-2, 2023, Novi Sad, Serbia",
title = "Purification and structural characterization of R-phycocyanin, Prečišćavanje i strukturna karakterizacija R-fikocijanina",
pages = "53-53",
url = "https://hdl.handle.net/21.15107/rcub_cherry_6315"
}

Veličković, L., Simović, A., Gligorijević, N., Obradović, M., Sotiroudis, G., Zoumpanioti, M., Minić, S.,& Nikolić, M.. (2023). Purification and structural characterization of R-phycocyanin. in 59th Meeting of the Serbian Chemical Society, Book of Abstracts, June 1-2, 2023, Novi Sad, Serbia
Belgrade : Serbian Chemical Society., 53-53.
https://hdl.handle.net/21.15107/rcub_cherry_6315

Veličković L, Simović A, Gligorijević N, Obradović M, Sotiroudis G, Zoumpanioti M, Minić S, Nikolić M. Purification and structural characterization of R-phycocyanin. in 59th Meeting of the Serbian Chemical Society, Book of Abstracts, June 1-2, 2023, Novi Sad, Serbia. 2023;:53-53.
https://hdl.handle.net/21.15107/rcub_cherry_6315 .

Veličković, Luka, Simović, Ana, Gligorijević, Nikola, Obradović, Milica, Sotiroudis, Georgios, Zoumpanioti, Maria, Minić, Simeon, Nikolić, Milan, "Purification and structural characterization of R-phycocyanin" in 59th Meeting of the Serbian Chemical Society, Book of Abstracts, June 1-2, 2023, Novi Sad, Serbia (2023):53-53,
https://hdl.handle.net/21.15107/rcub_cherry_6315 .

TY  - CONF
AU  - Simović, Ana
AU  - Radomirović, Mirjana Ž.
AU  - Gligorijević, Nikola
AU  - Stanić-Vučinić, Dragana
AU  - Minić, Simeon L.
AU  - Nikolić, Milan
AU  - Ćirković-Veličković, Tanja
PY  - 2022
UR  - http://cherry.chem.bg.ac.rs/handle/123456789/5520
AB  - The emergence of the coronavirus SARS-CoV-2 has attracted attention of the whole scientific community. The SARS-CoV-2 spike (S) protein plays the most important role in viral attachment to host receptor angiotensin-converting enzyme 2 (ACE2), via the receptor-binding domain (RBD), fusion and entry into the host, and it serves as a target for the development of antibodies, entry inhibitors and vaccines. It has been demonstrated that phycocyanobilin (PCB), a bioactive open-chain tetrapyrrole chromophore of phycocyanin (PC), chromoprotein derived from the cyanobacterium Arthrospira platensis, can bind a plethora of different proteins, both in a noncovalent and covalent manner. This study aimed to investigate interactions of PCB with S protein and RBD respectively. Electrophoretic techniques, fluorescence spectroscopy, and inhibition of S–PCB and RBD–PCB covalent adduct formation using iodoacetamide and N-ethylmaleimide, were employed to examine interactions of PCB with S protein and RBD, while the effects of PCB binding on RBD structure were studied by CD spectroscopy. SDS-PAGE with Zn2+ staining has revealed that PCB covalently binds to both S protein and RBD, via free cysteine residues. Binding constants determined by the fluorescence quenching method were: 2.1×107 M–1 for PCB and S protein and 8.4×104 M–1 for PCB and RBD. Far-UV circular dichroism spectra showed that the binding of PCB influences RBD structure by decreasing the disordered structure content. Due to moderately strong noncovalent interactions of PCB with S protein and RBD, as well as covalent adducts formation, it may exert one of its many bioactive effects via impact on S protein binding to ACE2 receptor.
PB  - Faculty of Chemistry, Serbian Biochemical Society
C3  - Serbian Biochemical Society Eleventh Conference, Scientific meeting of an international character, September 22nd and 23rd, 2022, Novi Sad, Serbia
T1  - Noncovalent and covalent binding of phycocyanobilin to S protein of SARS-CoV-2 and its receptor-binding domain
SP  - 130
EP  - 131
UR  - https://hdl.handle.net/21.15107/rcub_cherry_5520
ER  - 

@conference{
author = "Simović, Ana and Radomirović, Mirjana Ž. and Gligorijević, Nikola and Stanić-Vučinić, Dragana and Minić, Simeon L. and Nikolić, Milan and Ćirković-Veličković, Tanja",
year = "2022",
abstract = "The emergence of the coronavirus SARS-CoV-2 has attracted attention of the whole scientific community. The SARS-CoV-2 spike (S) protein plays the most important role in viral attachment to host receptor angiotensin-converting enzyme 2 (ACE2), via the receptor-binding domain (RBD), fusion and entry into the host, and it serves as a target for the development of antibodies, entry inhibitors and vaccines. It has been demonstrated that phycocyanobilin (PCB), a bioactive open-chain tetrapyrrole chromophore of phycocyanin (PC), chromoprotein derived from the cyanobacterium Arthrospira platensis, can bind a plethora of different proteins, both in a noncovalent and covalent manner. This study aimed to investigate interactions of PCB with S protein and RBD respectively. Electrophoretic techniques, fluorescence spectroscopy, and inhibition of S–PCB and RBD–PCB covalent adduct formation using iodoacetamide and N-ethylmaleimide, were employed to examine interactions of PCB with S protein and RBD, while the effects of PCB binding on RBD structure were studied by CD spectroscopy. SDS-PAGE with Zn2+ staining has revealed that PCB covalently binds to both S protein and RBD, via free cysteine residues. Binding constants determined by the fluorescence quenching method were: 2.1×107 M–1 for PCB and S protein and 8.4×104 M–1 for PCB and RBD. Far-UV circular dichroism spectra showed that the binding of PCB influences RBD structure by decreasing the disordered structure content. Due to moderately strong noncovalent interactions of PCB with S protein and RBD, as well as covalent adducts formation, it may exert one of its many bioactive effects via impact on S protein binding to ACE2 receptor.",
publisher = "Faculty of Chemistry, Serbian Biochemical Society",
journal = "Serbian Biochemical Society Eleventh Conference, Scientific meeting of an international character, September 22nd and 23rd, 2022, Novi Sad, Serbia",
title = "Noncovalent and covalent binding of phycocyanobilin to S protein of SARS-CoV-2 and its receptor-binding domain",
pages = "130-131",
url = "https://hdl.handle.net/21.15107/rcub_cherry_5520"
}

Simović, A., Radomirović, M. Ž., Gligorijević, N., Stanić-Vučinić, D., Minić, S. L., Nikolić, M.,& Ćirković-Veličković, T.. (2022). Noncovalent and covalent binding of phycocyanobilin to S protein of SARS-CoV-2 and its receptor-binding domain. in Serbian Biochemical Society Eleventh Conference, Scientific meeting of an international character, September 22nd and 23rd, 2022, Novi Sad, Serbia
Faculty of Chemistry, Serbian Biochemical Society., 130-131.
https://hdl.handle.net/21.15107/rcub_cherry_5520

Simović A, Radomirović MŽ, Gligorijević N, Stanić-Vučinić D, Minić SL, Nikolić M, Ćirković-Veličković T. Noncovalent and covalent binding of phycocyanobilin to S protein of SARS-CoV-2 and its receptor-binding domain. in Serbian Biochemical Society Eleventh Conference, Scientific meeting of an international character, September 22nd and 23rd, 2022, Novi Sad, Serbia. 2022;:130-131.
https://hdl.handle.net/21.15107/rcub_cherry_5520 .

Simović, Ana, Radomirović, Mirjana Ž., Gligorijević, Nikola, Stanić-Vučinić, Dragana, Minić, Simeon L., Nikolić, Milan, Ćirković-Veličković, Tanja, "Noncovalent and covalent binding of phycocyanobilin to S protein of SARS-CoV-2 and its receptor-binding domain" in Serbian Biochemical Society Eleventh Conference, Scientific meeting of an international character, September 22nd and 23rd, 2022, Novi Sad, Serbia (2022):130-131,
https://hdl.handle.net/21.15107/rcub_cherry_5520 .

TY  - CONF
AU  - Ćirković-Veličković, Tanja
AU  - Radomirović, Mirjana Ž.
AU  - Simović, Ana
AU  - Jovanović, Vesna B.
AU  - Ćujić, Danica R.
AU  - Gnjatović, Marija Lj.
AU  - Stojanović, Marijana
PY  - 2022
UR  - http://cherry.chem.bg.ac.rs/handle/123456789/5777
AB  - RT-PCR remains the primary method of diagnosing SARS-CoV-2. Serological diagnosis of COVID-19 is simple and does not require complex techniques and equipment, rendering it suitable for rapid detection and massive screening. However, serological tests cannot confirm SARS-CoV-2, and results will be false negative when antibody concentrations fall below detection limit. Serological testing is important method for diagnosis of severe acute respiratory syndrome coronavirus 2 (SARS CoV-2) infection. Antigen-based tests show high specificity, but sensitivity is relatively low. For development and further improvement of both serological and antigen-based tests, availability of recombinantly producted SARS CoV-2 antigens is needed and during the periods of high demend in the pandemic, it was a limited factor both for research and diagnostic tests production by national producers of tests. Nucleocapsid (N) protein is the most abundant virus derived protein and strong immunogen. We aimed to find its efficient, low-cost production. SARS-CoV-2 recombinant fragment of nucleocapsid protein (rfNP; 58-419 aa) was expressed in E. coli in soluble form, purified and characterized biochemically and immunologically. Purified rfNP has secondary structure of full-length recombinant N protein, with high percentage of disordered structure (34.2%) and of beta-sheet (40.7%). rfNP was tested in immunoblot using sera of COVID-19 convalescent patients. Cost-effective approach for soluble recombinant N protein fragment production was developed, with reliable IgG and IgM antibodies detection of SARS-CoV-2 infection. ELISA was optimized with sera of RT-PCR confirmed positive symptomatic patients and healthy individuals. IgG detection sensitivity was 96% (47/50) and specificity 97% (67/68), while IgM detection was slightly lower (94% and 96.5%, respectively). Application of serological ELISA for seropositivity detection in 200 allergic children in comparison to non-allergic did not show a bias towards any of the tested groups.  Furthermore, we have optimized production of rfNP at a large scale to raise specific antibodies to N-protein in rabbit and mice and develop an in house ELISA for quantification of N protein in biological fluids. Test was clinically validated in 200 PCR positive patients and showed a sensitivity of around 50%.
C3  - International Congress on Molecular Immunology and Allergology (IMAC-2022), Moscow, December 1-3, 2022
T1  - SARS CoV-2 nucleocapsid-based diagnostic tests and serological response in allergic children
UR  - https://hdl.handle.net/21.15107/rcub_cherry_5777
ER  - 

@conference{
author = "Ćirković-Veličković, Tanja and Radomirović, Mirjana Ž. and Simović, Ana and Jovanović, Vesna B. and Ćujić, Danica R. and Gnjatović, Marija Lj. and Stojanović, Marijana",
year = "2022",
abstract = "RT-PCR remains the primary method of diagnosing SARS-CoV-2. Serological diagnosis of COVID-19 is simple and does not require complex techniques and equipment, rendering it suitable for rapid detection and massive screening. However, serological tests cannot confirm SARS-CoV-2, and results will be false negative when antibody concentrations fall below detection limit. Serological testing is important method for diagnosis of severe acute respiratory syndrome coronavirus 2 (SARS CoV-2) infection. Antigen-based tests show high specificity, but sensitivity is relatively low. For development and further improvement of both serological and antigen-based tests, availability of recombinantly producted SARS CoV-2 antigens is needed and during the periods of high demend in the pandemic, it was a limited factor both for research and diagnostic tests production by national producers of tests. Nucleocapsid (N) protein is the most abundant virus derived protein and strong immunogen. We aimed to find its efficient, low-cost production. SARS-CoV-2 recombinant fragment of nucleocapsid protein (rfNP; 58-419 aa) was expressed in E. coli in soluble form, purified and characterized biochemically and immunologically. Purified rfNP has secondary structure of full-length recombinant N protein, with high percentage of disordered structure (34.2%) and of beta-sheet (40.7%). rfNP was tested in immunoblot using sera of COVID-19 convalescent patients. Cost-effective approach for soluble recombinant N protein fragment production was developed, with reliable IgG and IgM antibodies detection of SARS-CoV-2 infection. ELISA was optimized with sera of RT-PCR confirmed positive symptomatic patients and healthy individuals. IgG detection sensitivity was 96% (47/50) and specificity 97% (67/68), while IgM detection was slightly lower (94% and 96.5%, respectively). Application of serological ELISA for seropositivity detection in 200 allergic children in comparison to non-allergic did not show a bias towards any of the tested groups.  Furthermore, we have optimized production of rfNP at a large scale to raise specific antibodies to N-protein in rabbit and mice and develop an in house ELISA for quantification of N protein in biological fluids. Test was clinically validated in 200 PCR positive patients and showed a sensitivity of around 50%.",
journal = "International Congress on Molecular Immunology and Allergology (IMAC-2022), Moscow, December 1-3, 2022",
title = "SARS CoV-2 nucleocapsid-based diagnostic tests and serological response in allergic children",
url = "https://hdl.handle.net/21.15107/rcub_cherry_5777"
}

Ćirković-Veličković, T., Radomirović, M. Ž., Simović, A., Jovanović, V. B., Ćujić, D. R., Gnjatović, M. Lj.,& Stojanović, M.. (2022). SARS CoV-2 nucleocapsid-based diagnostic tests and serological response in allergic children. in International Congress on Molecular Immunology and Allergology (IMAC-2022), Moscow, December 1-3, 2022.
https://hdl.handle.net/21.15107/rcub_cherry_5777

Ćirković-Veličković T, Radomirović MŽ, Simović A, Jovanović VB, Ćujić DR, Gnjatović ML, Stojanović M. SARS CoV-2 nucleocapsid-based diagnostic tests and serological response in allergic children. in International Congress on Molecular Immunology and Allergology (IMAC-2022), Moscow, December 1-3, 2022. 2022;.
https://hdl.handle.net/21.15107/rcub_cherry_5777 .

Ćirković-Veličković, Tanja, Radomirović, Mirjana Ž., Simović, Ana, Jovanović, Vesna B., Ćujić, Danica R., Gnjatović, Marija Lj., Stojanović, Marijana, "SARS CoV-2 nucleocapsid-based diagnostic tests and serological response in allergic children" in International Congress on Molecular Immunology and Allergology (IMAC-2022), Moscow, December 1-3, 2022 (2022),
https://hdl.handle.net/21.15107/rcub_cherry_5777 .

TY  - CONF
AU  - Radomirović, Mirjana Ž.
AU  - Simović, Ana
AU  - Udovički, Božidar D.
AU  - Krstić-Ristivojević, Maja
AU  - Sabljić, Ljiljana Z.
AU  - Lukić, Ivana D.
AU  - Glamočlija, Sofija Đ.
AU  - Ćujić, Danica R.
AU  - Gnjatović, Marija Lj.
AU  - Stojanović, Marijana M.
AU  - Stanić-Vučinić, Dragana
AU  - Radosavljević, Jelena
AU  - Ćirković-Veličković, Tanja
PY  - 2022
UR  - http://cherry.chem.bg.ac.rs/handle/123456789/5361
AB  - Ta na dijagnoza ljudi sa sumnjom na infekciju SARS-CoV-2 je od suštinskog zna aja za
suzbijanje globalnog širenja COVID-19. Prisustvo SARS-CoV-2 može se otkriti RT-PCRom (otkriva RNK virusa) ili detekcijom prisustva virusnih antigena u biološkim te nostima
ELISA-om ili sli nom tehnikom koje koriste antitela razvijena u životinjama. Cilj studije
je bio uspostavljanje kvantitativnog testa koji se zasniva na koriš enju poliklonskih seruma
za rutinsko odre ivanje koncentracije SARS-CoV-2 nukleokapsidnog proteina merenjam
apsorbancije u standardnoj mikrotitarskoj plo ici sa 96 bunara. Za potrebe razvoja testa
proizveden je rekombinantni N-protein i koriš en za proizvodnju antiseruma u miševima i
ze evima. Proizvedeni antiserumi su pre iš eni i odre en im je titar. Poliklonskiantiserumi
visokog afiniteta specifi ni za N-protein koriš eni su za razvoj ELISA testa specifi nog za
ovaj protein. Test se zasniva na koriš enju poliklonskih seruma miševa koji su adherirani
na dno bunara mikrotitarske plo ice za hvatanje N-proteina iz uzorka. Razli ite
koncentracije rekombinantnog N-proteina su koriš ene za standardnu krivu za
kvantifikaciju proteina. N-protein vezan za antitela miševa je detektovan ze jim
poliklonskim serumom i anti-ze jim antitelom povezanim sa enzimom koji obezbe uje
spektrofotometrijsko merenje. Uspešno smo razvili prototip ELISA testa za kvantifikaciju
N-proteina sa granicom detekcije u opsegu od ng/mL. Prose na vrednost LOD za prototip
ELISA testa za detekciju N-proteina je 9,2 ng/mL, dok je prose na vrednost LOQ
10,2 ng/mL. Pokazali smo da su proizvedeni poliklonski antiserumi pogodni za detekciju
N-proteina sa sli nim ili boljim afinitetom i specifi noš u od komercijalnih antitela.
Štaviše, prototip ELISA testa se može koristiti sa zadovoljavaju om pouzdanoš u za
kvantifikaciju N-proteina u uzorcima bogatim proteinima, poput ljudskih seruma.
AB  - The accurate diagnosis of people with suspected infection with the SARS-CoV-2 is
essential to curb the global spread of COVID-19. The presence of SARS-CoV-2 can be
detected by RT-PCR (it detects RNA of the virus) or by the presence of viral antigens in
biological fluids in ELISA or similar techniques using antibodies developed in animals.
The aim of the study was the establishment of a quantitative polyclonal sera-based test for
routine measurement of the concentration of SARS CoV-2 nucleocapsid protein using
absorbance measurement in a standard 96-well microtiter plate. For the purposes of the test
development, recombinant N protein was produced and used for the production of mice
and rabbit antisera. Produced antisera were purified and titer was determined. High-affinity
polyclonal N-protein specific antisera were used for N-protein specific ELISA test
development. The test is based on mice polyclonal sera adhered to microtiter plate bottom
for the capture of the N protein from the specimen. Various concentrations of the
recombinant N-protein were used to generate a standard curve for protein quantification.
The N-protein bound to the mice antibodies was detected with rabbit polyclonal sera and
anti-rabbit antibody coupled to an enzyme that provides spectrophotometric measurement.
We have successfully developed the prototype ELISA for the quantification of N-protein
with the detection limit being in the range of ng/mL. The average LOD value for the
prototype ELISA was determined to be 9.2 ng/mL, while the average LOQ value was
10.2 ng/mL. We have demonstrated that produced polyclonal antisera are suitable for the
detection of N-protein with affinity and specificity similar to, or better than commercial
antibodies. Furthermore, the prototype ELISA can be used with satisfactory confidence for
quantification of the N-protein in protein-rich samples, similar to human sera.
PB  - Belgrade : Serbian Chemical Society
C3  - 58th Meeting of the Serbian Chemical Society, Belgrade, Serbia, 9th-10th June, 2022. In: Book of Abstracts and Proceedings
T1  - Razvoj sendvič ELISA testa specifičnog za SARS-CoV-2 N-protein
T1  - Development of SARS-CoV-2 N-protein specific capture ELISA
SP  - 65
EP  - 66
UR  - https://hdl.handle.net/21.15107/rcub_cherry_5361
ER  - 

@conference{
author = "Radomirović, Mirjana Ž. and Simović, Ana and Udovički, Božidar D. and Krstić-Ristivojević, Maja and Sabljić, Ljiljana Z. and Lukić, Ivana D. and Glamočlija, Sofija Đ. and Ćujić, Danica R. and Gnjatović, Marija Lj. and Stojanović, Marijana M. and Stanić-Vučinić, Dragana and Radosavljević, Jelena and Ćirković-Veličković, Tanja",
year = "2022",
abstract = "Ta na dijagnoza ljudi sa sumnjom na infekciju SARS-CoV-2 je od suštinskog zna aja za
suzbijanje globalnog širenja COVID-19. Prisustvo SARS-CoV-2 može se otkriti RT-PCRom (otkriva RNK virusa) ili detekcijom prisustva virusnih antigena u biološkim te nostima
ELISA-om ili sli nom tehnikom koje koriste antitela razvijena u životinjama. Cilj studije
je bio uspostavljanje kvantitativnog testa koji se zasniva na koriš enju poliklonskih seruma
za rutinsko odre ivanje koncentracije SARS-CoV-2 nukleokapsidnog proteina merenjam
apsorbancije u standardnoj mikrotitarskoj plo ici sa 96 bunara. Za potrebe razvoja testa
proizveden je rekombinantni N-protein i koriš en za proizvodnju antiseruma u miševima i
ze evima. Proizvedeni antiserumi su pre iš eni i odre en im je titar. Poliklonskiantiserumi
visokog afiniteta specifi ni za N-protein koriš eni su za razvoj ELISA testa specifi nog za
ovaj protein. Test se zasniva na koriš enju poliklonskih seruma miševa koji su adherirani
na dno bunara mikrotitarske plo ice za hvatanje N-proteina iz uzorka. Razli ite
koncentracije rekombinantnog N-proteina su koriš ene za standardnu krivu za
kvantifikaciju proteina. N-protein vezan za antitela miševa je detektovan ze jim
poliklonskim serumom i anti-ze jim antitelom povezanim sa enzimom koji obezbe uje
spektrofotometrijsko merenje. Uspešno smo razvili prototip ELISA testa za kvantifikaciju
N-proteina sa granicom detekcije u opsegu od ng/mL. Prose na vrednost LOD za prototip
ELISA testa za detekciju N-proteina je 9,2 ng/mL, dok je prose na vrednost LOQ
10,2 ng/mL. Pokazali smo da su proizvedeni poliklonski antiserumi pogodni za detekciju
N-proteina sa sli nim ili boljim afinitetom i specifi noš u od komercijalnih antitela.
Štaviše, prototip ELISA testa se može koristiti sa zadovoljavaju om pouzdanoš u za
kvantifikaciju N-proteina u uzorcima bogatim proteinima, poput ljudskih seruma., The accurate diagnosis of people with suspected infection with the SARS-CoV-2 is
essential to curb the global spread of COVID-19. The presence of SARS-CoV-2 can be
detected by RT-PCR (it detects RNA of the virus) or by the presence of viral antigens in
biological fluids in ELISA or similar techniques using antibodies developed in animals.
The aim of the study was the establishment of a quantitative polyclonal sera-based test for
routine measurement of the concentration of SARS CoV-2 nucleocapsid protein using
absorbance measurement in a standard 96-well microtiter plate. For the purposes of the test
development, recombinant N protein was produced and used for the production of mice
and rabbit antisera. Produced antisera were purified and titer was determined. High-affinity
polyclonal N-protein specific antisera were used for N-protein specific ELISA test
development. The test is based on mice polyclonal sera adhered to microtiter plate bottom
for the capture of the N protein from the specimen. Various concentrations of the
recombinant N-protein were used to generate a standard curve for protein quantification.
The N-protein bound to the mice antibodies was detected with rabbit polyclonal sera and
anti-rabbit antibody coupled to an enzyme that provides spectrophotometric measurement.
We have successfully developed the prototype ELISA for the quantification of N-protein
with the detection limit being in the range of ng/mL. The average LOD value for the
prototype ELISA was determined to be 9.2 ng/mL, while the average LOQ value was
10.2 ng/mL. We have demonstrated that produced polyclonal antisera are suitable for the
detection of N-protein with affinity and specificity similar to, or better than commercial
antibodies. Furthermore, the prototype ELISA can be used with satisfactory confidence for
quantification of the N-protein in protein-rich samples, similar to human sera.",
publisher = "Belgrade : Serbian Chemical Society",
journal = "58th Meeting of the Serbian Chemical Society, Belgrade, Serbia, 9th-10th June, 2022. In: Book of Abstracts and Proceedings",
title = "Razvoj sendvič ELISA testa specifičnog za SARS-CoV-2 N-protein, Development of SARS-CoV-2 N-protein specific capture ELISA",
pages = "65-66",
url = "https://hdl.handle.net/21.15107/rcub_cherry_5361"
}

Radomirović, M. Ž., Simović, A., Udovički, B. D., Krstić-Ristivojević, M., Sabljić, L. Z., Lukić, I. D., Glamočlija, S. Đ., Ćujić, D. R., Gnjatović, M. Lj., Stojanović, M. M., Stanić-Vučinić, D., Radosavljević, J.,& Ćirković-Veličković, T.. (2022). Razvoj sendvič ELISA testa specifičnog za SARS-CoV-2 N-protein. in 58th Meeting of the Serbian Chemical Society, Belgrade, Serbia, 9th-10th June, 2022. In: Book of Abstracts and Proceedings
Belgrade : Serbian Chemical Society., 65-66.
https://hdl.handle.net/21.15107/rcub_cherry_5361

Radomirović MŽ, Simović A, Udovički BD, Krstić-Ristivojević M, Sabljić LZ, Lukić ID, Glamočlija SĐ, Ćujić DR, Gnjatović ML, Stojanović MM, Stanić-Vučinić D, Radosavljević J, Ćirković-Veličković T. Razvoj sendvič ELISA testa specifičnog za SARS-CoV-2 N-protein. in 58th Meeting of the Serbian Chemical Society, Belgrade, Serbia, 9th-10th June, 2022. In: Book of Abstracts and Proceedings. 2022;:65-66.
https://hdl.handle.net/21.15107/rcub_cherry_5361 .

Radomirović, Mirjana Ž., Simović, Ana, Udovički, Božidar D., Krstić-Ristivojević, Maja, Sabljić, Ljiljana Z., Lukić, Ivana D., Glamočlija, Sofija Đ., Ćujić, Danica R., Gnjatović, Marija Lj., Stojanović, Marijana M., Stanić-Vučinić, Dragana, Radosavljević, Jelena, Ćirković-Veličković, Tanja, "Razvoj sendvič ELISA testa specifičnog za SARS-CoV-2 N-protein" in 58th Meeting of the Serbian Chemical Society, Belgrade, Serbia, 9th-10th June, 2022. In: Book of Abstracts and Proceedings (2022):65-66,
https://hdl.handle.net/21.15107/rcub_cherry_5361 .

TY  - CONF
AU  - Radomirović, Mirjana Ž.
AU  - Simović, Ana
AU  - Udovički, Božidar D.
AU  - Krstić-Ristivojević, Maja
AU  - Sabljić, Ljiljana Z.
AU  - Lukić, Ivana D.
AU  - Glamočlija, Sofija Đ.
AU  - Ćujić, Danica R.
AU  - Gnjatović, Marija Lj.
AU  - Stojanović, Marijana M.
AU  - Stanić-Vučinić, Dragana
AU  - Radosavljević, Jelena
AU  - Ćirković-Veličković, Tanja
PY  - 2022
UR  - http://cherry.chem.bg.ac.rs/handle/123456789/5362
AB  - Ta na dijagnoza ljudi sa sumnjom na infekciju SARS-CoV-2 je od suštinskog zna aja zasuzbijanje globalnog širenja COVID-19. Prisustvo SARS-CoV-2 može se otkriti RT-PCRom (otkriva RNK virusa) ili detekcijom prisustva virusnih antigena u biološkim te nostimaELISA-om ili sli nom tehnikom koje koriste antitela razvijena u životinjama. Cilj studijeje bio uspostavljanje kvantitativnog testa koji se zasniva na koriš enju poliklonskih serumaza rutinsko odre ivanje koncentracije SARS-CoV-2 nukleokapsidnog proteina merenjamapsorbancije u standardnoj mikrotitarskoj plo ici sa 96 bunara. Za potrebe razvoja testaproizveden je rekombinantni N-protein i koriš en za proizvodnju antiseruma u miševima ize evima. Proizvedeni antiserumi su pre iš eni i odre en im je titar. Poliklonskiantiserumivisokog afiniteta specifi ni za N-protein koriš eni su za razvoj ELISA testa specifi nog zaovaj protein. Test se zasniva na koriš enju poliklonskih seruma miševa koji su adheriranina dno bunara mikrotitarske plo ice za hvatanje N-proteina iz uzorka. Razli itekoncentracije rekombinantnog N-proteina su koriš ene za standardnu krivu zakvantifikaciju proteina. N-protein vezan za antitela miševa je detektovan ze jimpoliklonskim serumom i anti-ze jim antitelom povezanim sa enzimom koji obezbe ujespektrofotometrijsko merenje. Uspešno smo razvili prototip ELISA testa za kvantifikacijuN-proteina sa granicom detekcije u opsegu od ng/mL. Prose na vrednost LOD za prototipELISA testa za detekciju N-proteina je 9,2 ng/mL, dok je prose na vrednost LOQ10,2 ng/mL. Pokazali smo da su proizvedeni poliklonski antiserumi pogodni za detekcijuN-proteina sa sli nim ili boljim afinitetom i specifi noš u od komercijalnih antitela.Štaviše, prototip ELISA testa se može koristiti sa zadovoljavaju om pouzdanoš u zakvantifikaciju N-proteina u uzorcima bogatim proteinima, poput ljudskih seruma.
AB  - The accurate diagnosis of people with suspected infection with the SARS-CoV-2 isessential to curb the global spread of COVID-19. The presence of SARS-CoV-2 can bedetected by RT-PCR (it detects RNA of the virus) or by the presence of viral antigens inbiological fluids in ELISA or similar techniques using antibodies developed in animals.The aim of the study was the establishment of a quantitative polyclonal sera-based test forroutine measurement of the concentration of SARS CoV-2 nucleocapsid protein usingabsorbance measurement in a standard 96-well microtiter plate. For the purposes of the testdevelopment, recombinant N protein was produced and used for the production of miceand rabbit antisera. Produced antisera were purified and titer was determined. High-affinitypolyclonal N-protein specific antisera were used for N-protein specific ELISA testdevelopment. The test is based on mice polyclonal sera adhered to microtiter plate bottomfor the capture of the N protein from the specimen. Various concentrations of therecombinant N-protein were used to generate a standard curve for protein quantification.The N-protein bound to the mice antibodies was detected with rabbit polyclonal sera andanti-rabbit antibody coupled to an enzyme that provides spectrophotometric measurement.We have successfully developed the prototype ELISA for the quantification of N-proteinwith the detection limit being in the range of ng/mL. The average LOD value for theprototype ELISA was determined to be 9.2 ng/mL, while the average LOQ value was10.2 ng/mL. We have demonstrated that produced polyclonal antisera are suitable for thedetection of N-protein with affinity and specificity similar to, or better than commercialantibodies. Furthermore, the prototype ELISA can be used with satisfactory confidence forquantification of the N-protein in protein-rich samples, similar to human sera.
PB  - Belgrade : Serbian Chemical Society
C3  - 58th Meeting of the Serbian Chemical Society, Belgrade, Serbia, 9th-10th June, 2022. In: Book of Abstracts and Proceedings
T1  - Razvoj sendvič ELISA testa specifičnog za SARS-CoV-2 N-protein
T1  - Development of SARS-CoV-2 N-protein specific capture ELISA
UR  - https://hdl.handle.net/21.15107/rcub_cherry_5362
ER  - 

@conference{
author = "Radomirović, Mirjana Ž. and Simović, Ana and Udovički, Božidar D. and Krstić-Ristivojević, Maja and Sabljić, Ljiljana Z. and Lukić, Ivana D. and Glamočlija, Sofija Đ. and Ćujić, Danica R. and Gnjatović, Marija Lj. and Stojanović, Marijana M. and Stanić-Vučinić, Dragana and Radosavljević, Jelena and Ćirković-Veličković, Tanja",
year = "2022",
abstract = "Ta na dijagnoza ljudi sa sumnjom na infekciju SARS-CoV-2 je od suštinskog zna aja zasuzbijanje globalnog širenja COVID-19. Prisustvo SARS-CoV-2 može se otkriti RT-PCRom (otkriva RNK virusa) ili detekcijom prisustva virusnih antigena u biološkim te nostimaELISA-om ili sli nom tehnikom koje koriste antitela razvijena u životinjama. Cilj studijeje bio uspostavljanje kvantitativnog testa koji se zasniva na koriš enju poliklonskih serumaza rutinsko odre ivanje koncentracije SARS-CoV-2 nukleokapsidnog proteina merenjamapsorbancije u standardnoj mikrotitarskoj plo ici sa 96 bunara. Za potrebe razvoja testaproizveden je rekombinantni N-protein i koriš en za proizvodnju antiseruma u miševima ize evima. Proizvedeni antiserumi su pre iš eni i odre en im je titar. Poliklonskiantiserumivisokog afiniteta specifi ni za N-protein koriš eni su za razvoj ELISA testa specifi nog zaovaj protein. Test se zasniva na koriš enju poliklonskih seruma miševa koji su adheriranina dno bunara mikrotitarske plo ice za hvatanje N-proteina iz uzorka. Razli itekoncentracije rekombinantnog N-proteina su koriš ene za standardnu krivu zakvantifikaciju proteina. N-protein vezan za antitela miševa je detektovan ze jimpoliklonskim serumom i anti-ze jim antitelom povezanim sa enzimom koji obezbe ujespektrofotometrijsko merenje. Uspešno smo razvili prototip ELISA testa za kvantifikacijuN-proteina sa granicom detekcije u opsegu od ng/mL. Prose na vrednost LOD za prototipELISA testa za detekciju N-proteina je 9,2 ng/mL, dok je prose na vrednost LOQ10,2 ng/mL. Pokazali smo da su proizvedeni poliklonski antiserumi pogodni za detekcijuN-proteina sa sli nim ili boljim afinitetom i specifi noš u od komercijalnih antitela.Štaviše, prototip ELISA testa se može koristiti sa zadovoljavaju om pouzdanoš u zakvantifikaciju N-proteina u uzorcima bogatim proteinima, poput ljudskih seruma., The accurate diagnosis of people with suspected infection with the SARS-CoV-2 isessential to curb the global spread of COVID-19. The presence of SARS-CoV-2 can bedetected by RT-PCR (it detects RNA of the virus) or by the presence of viral antigens inbiological fluids in ELISA or similar techniques using antibodies developed in animals.The aim of the study was the establishment of a quantitative polyclonal sera-based test forroutine measurement of the concentration of SARS CoV-2 nucleocapsid protein usingabsorbance measurement in a standard 96-well microtiter plate. For the purposes of the testdevelopment, recombinant N protein was produced and used for the production of miceand rabbit antisera. Produced antisera were purified and titer was determined. High-affinitypolyclonal N-protein specific antisera were used for N-protein specific ELISA testdevelopment. The test is based on mice polyclonal sera adhered to microtiter plate bottomfor the capture of the N protein from the specimen. Various concentrations of therecombinant N-protein were used to generate a standard curve for protein quantification.The N-protein bound to the mice antibodies was detected with rabbit polyclonal sera andanti-rabbit antibody coupled to an enzyme that provides spectrophotometric measurement.We have successfully developed the prototype ELISA for the quantification of N-proteinwith the detection limit being in the range of ng/mL. The average LOD value for theprototype ELISA was determined to be 9.2 ng/mL, while the average LOQ value was10.2 ng/mL. We have demonstrated that produced polyclonal antisera are suitable for thedetection of N-protein with affinity and specificity similar to, or better than commercialantibodies. Furthermore, the prototype ELISA can be used with satisfactory confidence forquantification of the N-protein in protein-rich samples, similar to human sera.",
publisher = "Belgrade : Serbian Chemical Society",
journal = "58th Meeting of the Serbian Chemical Society, Belgrade, Serbia, 9th-10th June, 2022. In: Book of Abstracts and Proceedings",
title = "Razvoj sendvič ELISA testa specifičnog za SARS-CoV-2 N-protein, Development of SARS-CoV-2 N-protein specific capture ELISA",
url = "https://hdl.handle.net/21.15107/rcub_cherry_5362"
}

Radomirović, M. Ž., Simović, A., Udovički, B. D., Krstić-Ristivojević, M., Sabljić, L. Z., Lukić, I. D., Glamočlija, S. Đ., Ćujić, D. R., Gnjatović, M. Lj., Stojanović, M. M., Stanić-Vučinić, D., Radosavljević, J.,& Ćirković-Veličković, T.. (2022). Razvoj sendvič ELISA testa specifičnog za SARS-CoV-2 N-protein. in 58th Meeting of the Serbian Chemical Society, Belgrade, Serbia, 9th-10th June, 2022. In: Book of Abstracts and Proceedings
Belgrade : Serbian Chemical Society..
https://hdl.handle.net/21.15107/rcub_cherry_5362

Radomirović MŽ, Simović A, Udovički BD, Krstić-Ristivojević M, Sabljić LZ, Lukić ID, Glamočlija SĐ, Ćujić DR, Gnjatović ML, Stojanović MM, Stanić-Vučinić D, Radosavljević J, Ćirković-Veličković T. Razvoj sendvič ELISA testa specifičnog za SARS-CoV-2 N-protein. in 58th Meeting of the Serbian Chemical Society, Belgrade, Serbia, 9th-10th June, 2022. In: Book of Abstracts and Proceedings. 2022;.
https://hdl.handle.net/21.15107/rcub_cherry_5362 .

Radomirović, Mirjana Ž., Simović, Ana, Udovički, Božidar D., Krstić-Ristivojević, Maja, Sabljić, Ljiljana Z., Lukić, Ivana D., Glamočlija, Sofija Đ., Ćujić, Danica R., Gnjatović, Marija Lj., Stojanović, Marijana M., Stanić-Vučinić, Dragana, Radosavljević, Jelena, Ćirković-Veličković, Tanja, "Razvoj sendvič ELISA testa specifičnog za SARS-CoV-2 N-protein" in 58th Meeting of the Serbian Chemical Society, Belgrade, Serbia, 9th-10th June, 2022. In: Book of Abstracts and Proceedings (2022),
https://hdl.handle.net/21.15107/rcub_cherry_5362 .

TY  - JOUR
AU  - Stanić-Vučinić, Dragana
AU  - Stojadinović, Marija M.
AU  - Radomirović, Mirjana Ž.
AU  - Simović, Ana
AU  - Radibratović, Milica
AU  - Ćirković-Veličković, Tanja
PY  - 2022
UR  - http://cherry.chem.bg.ac.rs/handle/123456789/4884
AB  - Background: The world’s production of whey is estimated to be more than 200 milliontons per year. Although whey is an important source of proteins with high nutritional value andbiotechnological importance, it is still considered as a by-product of the dairy industry with loweconomic value due to low industrial exploitation. There are several challenges in the separation ofwhey proteins: low concentration, the complexity of the material and similar properties (pI, molecularmass) of some proteins.Methods: A narrative review of all the relevant papers on the present methodologies based on ionexchange and adsorption principles for isolation of whey proteins, known to the authors, was conductedResults: Traditional ion exchange techniques are widely used for the separation and purification ofthe bovine whey proteins. These methodologies, based on the anion or cation chromatographicprocedures, as well as the combination of aforementioned techniques are still preferential methodsfor the isolation of the whey proteins on the laboratory scale. However, more recent research on ionexchange membranes for this purpose has been introduced, with promising potential to be appliedon the pilot industrial scale. Newly developed methodologies based either on the ion exchangeseparation (for example: simulated moving bed chromatography, expanded bed adsorption, magneticion exchangers, etc.) or adsorption (for example: adsorption on hydroxyapatite or activatedcarbon, or molecular imprinting) are promising approaches for scaling up of the whey proteins’purification processes.Conclusion: Many procedures based on ion exchange are successfully implemented for the separationand purification of whey proteins, providing protein preparations of moderate-to-high yieldand satisfactory purity. However, the authors anticipate further development of adsorption-basedmethodologies for the separation of whey proteins by targeting the differences in proteins’ structuresrather than targeting the differences in molecular masses and pI. The complex composite multilayeredmatrices, including also inorganic components, are promising materials for simultaneousexploiting of the differences in the masses, pI and structures of whey proteins for the separation.
PB  - Bentham Science
T2  - Current Analytical Chemistry
T1  - Application of Ion Exchange and Adsorption Techniques for Separation of Whey Proteins from Bovine Milk
VL  - 18
IS  - 3
SP  - 341
EP  - 359
DO  - 10.2174/1573411017666210108092338
UR  - https://hdl.handle.net/21.15107/rcub_cherry_4884
ER  - 

@article{
author = "Stanić-Vučinić, Dragana and Stojadinović, Marija M. and Radomirović, Mirjana Ž. and Simović, Ana and Radibratović, Milica and Ćirković-Veličković, Tanja",
year = "2022",
abstract = "Background: The world’s production of whey is estimated to be more than 200 milliontons per year. Although whey is an important source of proteins with high nutritional value andbiotechnological importance, it is still considered as a by-product of the dairy industry with loweconomic value due to low industrial exploitation. There are several challenges in the separation ofwhey proteins: low concentration, the complexity of the material and similar properties (pI, molecularmass) of some proteins.Methods: A narrative review of all the relevant papers on the present methodologies based on ionexchange and adsorption principles for isolation of whey proteins, known to the authors, was conductedResults: Traditional ion exchange techniques are widely used for the separation and purification ofthe bovine whey proteins. These methodologies, based on the anion or cation chromatographicprocedures, as well as the combination of aforementioned techniques are still preferential methodsfor the isolation of the whey proteins on the laboratory scale. However, more recent research on ionexchange membranes for this purpose has been introduced, with promising potential to be appliedon the pilot industrial scale. Newly developed methodologies based either on the ion exchangeseparation (for example: simulated moving bed chromatography, expanded bed adsorption, magneticion exchangers, etc.) or adsorption (for example: adsorption on hydroxyapatite or activatedcarbon, or molecular imprinting) are promising approaches for scaling up of the whey proteins’purification processes.Conclusion: Many procedures based on ion exchange are successfully implemented for the separationand purification of whey proteins, providing protein preparations of moderate-to-high yieldand satisfactory purity. However, the authors anticipate further development of adsorption-basedmethodologies for the separation of whey proteins by targeting the differences in proteins’ structuresrather than targeting the differences in molecular masses and pI. The complex composite multilayeredmatrices, including also inorganic components, are promising materials for simultaneousexploiting of the differences in the masses, pI and structures of whey proteins for the separation.",
publisher = "Bentham Science",
journal = "Current Analytical Chemistry",
title = "Application of Ion Exchange and Adsorption Techniques for Separation of Whey Proteins from Bovine Milk",
volume = "18",
number = "3",
pages = "341-359",
doi = "10.2174/1573411017666210108092338",
url = "https://hdl.handle.net/21.15107/rcub_cherry_4884"
}

Stanić-Vučinić, D., Stojadinović, M. M., Radomirović, M. Ž., Simović, A., Radibratović, M.,& Ćirković-Veličković, T.. (2022). Application of Ion Exchange and Adsorption Techniques for Separation of Whey Proteins from Bovine Milk. in Current Analytical Chemistry
Bentham Science., 18(3), 341-359.
https://doi.org/10.2174/1573411017666210108092338
https://hdl.handle.net/21.15107/rcub_cherry_4884

Stanić-Vučinić D, Stojadinović MM, Radomirović MŽ, Simović A, Radibratović M, Ćirković-Veličković T. Application of Ion Exchange and Adsorption Techniques for Separation of Whey Proteins from Bovine Milk. in Current Analytical Chemistry. 2022;18(3):341-359.
doi:10.2174/1573411017666210108092338
https://hdl.handle.net/21.15107/rcub_cherry_4884 .

Stanić-Vučinić, Dragana, Stojadinović, Marija M., Radomirović, Mirjana Ž., Simović, Ana, Radibratović, Milica, Ćirković-Veličković, Tanja, "Application of Ion Exchange and Adsorption Techniques for Separation of Whey Proteins from Bovine Milk" in Current Analytical Chemistry, 18, no. 3 (2022):341-359,
https://doi.org/10.2174/1573411017666210108092338 .,
https://hdl.handle.net/21.15107/rcub_cherry_4884 .

TY  - JOUR
AU  - Radosavljević, Jelena
AU  - Stanić-Vučinić, Dragana
AU  - Stojadinović, Marija M.
AU  - Radomirović, Mirjana Ž.
AU  - Simović, Ana
AU  - Radibratović, Milica
AU  - Ćirković-Veličković, Tanja
PY  - 2022
UR  - http://cherry.chem.bg.ac.rs/handle/123456789/4883
AB  - Background: The world’s production of whey is estimated to be more than 200 milliontons per year. Although whey is an important source of proteins with high nutritional value andbiotechnological importance, it is still considered as a by-product of the dairy industry with loweconomic value due to low industrial exploitation. There are several challenges in the separation ofwhey proteins: low concentration, the complexity of the material and similar properties (pI, molecularmass) of some proteins.Methods: A narrative review of all the relevant papers on the present methodologies based on ionexchange and adsorption principles for isolation of whey proteins, known to the authors, was conductedResults: Traditional ion exchange techniques are widely used for the separation and purification ofthe bovine whey proteins. These methodologies, based on the anion or cation chromatographicprocedures, as well as the combination of aforementioned techniques are still preferential methodsfor the isolation of the whey proteins on the laboratory scale. However, more recent research on ionexchange membranes for this purpose has been introduced, with promising potential to be appliedon the pilot industrial scale. Newly developed methodologies based either on the ion exchangeseparation (for example: simulated moving bed chromatography, expanded bed adsorption, magneticion exchangers, etc.) or adsorption (for example: adsorption on hydroxyapatite or activatedcarbon, or molecular imprinting) are promising approaches for scaling up of the whey proteins’purification processes.Conclusion: Many procedures based on ion exchange are successfully implemented for the separationand purification of whey proteins, providing protein preparations of moderate-to-high yieldand satisfactory purity. However, the authors anticipate further development of adsorption-basedmethodologies for the separation of whey proteins by targeting the differences in proteins’ structuresrather than targeting the differences in molecular masses and pI. The complex composite multilayeredmatrices, including also inorganic components, are promising materials for simultaneousexploiting of the differences in the masses, pI and structures of whey proteins for the separation.
PB  - Bentham Science
T2  - Current Analytical Chemistry
T1  - Application of Ion Exchange and Adsorption Techniques for Separation of Whey Proteins from Bovine Milk
VL  - 18
IS  - 3
SP  - 341
EP  - 359
DO  - 10.2174/1573411017666210108092338
UR  - https://hdl.handle.net/21.15107/rcub_cherry_4883
ER  - 

@article{
author = "Radosavljević, Jelena and Stanić-Vučinić, Dragana and Stojadinović, Marija M. and Radomirović, Mirjana Ž. and Simović, Ana and Radibratović, Milica and Ćirković-Veličković, Tanja",
year = "2022",
abstract = "Background: The world’s production of whey is estimated to be more than 200 milliontons per year. Although whey is an important source of proteins with high nutritional value andbiotechnological importance, it is still considered as a by-product of the dairy industry with loweconomic value due to low industrial exploitation. There are several challenges in the separation ofwhey proteins: low concentration, the complexity of the material and similar properties (pI, molecularmass) of some proteins.Methods: A narrative review of all the relevant papers on the present methodologies based on ionexchange and adsorption principles for isolation of whey proteins, known to the authors, was conductedResults: Traditional ion exchange techniques are widely used for the separation and purification ofthe bovine whey proteins. These methodologies, based on the anion or cation chromatographicprocedures, as well as the combination of aforementioned techniques are still preferential methodsfor the isolation of the whey proteins on the laboratory scale. However, more recent research on ionexchange membranes for this purpose has been introduced, with promising potential to be appliedon the pilot industrial scale. Newly developed methodologies based either on the ion exchangeseparation (for example: simulated moving bed chromatography, expanded bed adsorption, magneticion exchangers, etc.) or adsorption (for example: adsorption on hydroxyapatite or activatedcarbon, or molecular imprinting) are promising approaches for scaling up of the whey proteins’purification processes.Conclusion: Many procedures based on ion exchange are successfully implemented for the separationand purification of whey proteins, providing protein preparations of moderate-to-high yieldand satisfactory purity. However, the authors anticipate further development of adsorption-basedmethodologies for the separation of whey proteins by targeting the differences in proteins’ structuresrather than targeting the differences in molecular masses and pI. The complex composite multilayeredmatrices, including also inorganic components, are promising materials for simultaneousexploiting of the differences in the masses, pI and structures of whey proteins for the separation.",
publisher = "Bentham Science",
journal = "Current Analytical Chemistry",
title = "Application of Ion Exchange and Adsorption Techniques for Separation of Whey Proteins from Bovine Milk",
volume = "18",
number = "3",
pages = "341-359",
doi = "10.2174/1573411017666210108092338",
url = "https://hdl.handle.net/21.15107/rcub_cherry_4883"
}

Radosavljević, J., Stanić-Vučinić, D., Stojadinović, M. M., Radomirović, M. Ž., Simović, A., Radibratović, M.,& Ćirković-Veličković, T.. (2022). Application of Ion Exchange and Adsorption Techniques for Separation of Whey Proteins from Bovine Milk. in Current Analytical Chemistry
Bentham Science., 18(3), 341-359.
https://doi.org/10.2174/1573411017666210108092338
https://hdl.handle.net/21.15107/rcub_cherry_4883

Radosavljević J, Stanić-Vučinić D, Stojadinović MM, Radomirović MŽ, Simović A, Radibratović M, Ćirković-Veličković T. Application of Ion Exchange and Adsorption Techniques for Separation of Whey Proteins from Bovine Milk. in Current Analytical Chemistry. 2022;18(3):341-359.
doi:10.2174/1573411017666210108092338
https://hdl.handle.net/21.15107/rcub_cherry_4883 .

Radosavljević, Jelena, Stanić-Vučinić, Dragana, Stojadinović, Marija M., Radomirović, Mirjana Ž., Simović, Ana, Radibratović, Milica, Ćirković-Veličković, Tanja, "Application of Ion Exchange and Adsorption Techniques for Separation of Whey Proteins from Bovine Milk" in Current Analytical Chemistry, 18, no. 3 (2022):341-359,
https://doi.org/10.2174/1573411017666210108092338 .,
https://hdl.handle.net/21.15107/rcub_cherry_4883 .

TY  - JOUR
AU  - Simović, Ana
AU  - Combet, Sophie
AU  - Ćirković-Veličković, Tanja
AU  - Nikolic, Milan
AU  - Minić, Simeon L.
PY  - 2022
UR  - http://cherry.chem.bg.ac.rs/handle/123456789/5002
AB  - This study aimed to characterise the stability of R-phycoerythrin (R-PE), a vivid natural colourant with emerging
potential for application in the food industry. High-quality (A560/A280 ≥ 5), native (α-helix content 75%) R-PE
was purified from commercial dried Nori (Porphyra sp.) flakes. Thermal unfolding revealed two transitions (at 56
and 72 ◦C), ascribed to different protein subunits. Contrary to elevated temperature, high-pressure (HP) treatment showed significant advantages: The R-PE unfolding was partly reversible and the colour bleaching was
minimal. Binding of Cu2+ (6.3 × 105 M− 1
) and Zn2+ (1.7 × 103 M− 1
) influenced conformational changes in the
protein tetrapyrrole chromophore without affecting R-PE structure and stability (colour). The results give new
insights into the stability of R-PE suggesting its usefulness for the replacement of toxic synthetic dyes. Preservation of the red colour of R-PE could be considered in fortified food and beverages by HP processing. R-PE may
act as a biosensor for Cu2+ in aquatic systems.
PB  - Elsevier
T2  - Food Chemistry
T1  - Probing the stability of the food colourant R-phycoerythrin from dried Nori flakes
VL  - 374
IS  - 131780
DO  - 10.1016/j.foodchem.2021.131780
ER  - 

@article{
author = "Simović, Ana and Combet, Sophie and Ćirković-Veličković, Tanja and Nikolic, Milan and Minić, Simeon L.",
year = "2022",
abstract = "This study aimed to characterise the stability of R-phycoerythrin (R-PE), a vivid natural colourant with emerging
potential for application in the food industry. High-quality (A560/A280 ≥ 5), native (α-helix content 75%) R-PE
was purified from commercial dried Nori (Porphyra sp.) flakes. Thermal unfolding revealed two transitions (at 56
and 72 ◦C), ascribed to different protein subunits. Contrary to elevated temperature, high-pressure (HP) treatment showed significant advantages: The R-PE unfolding was partly reversible and the colour bleaching was
minimal. Binding of Cu2+ (6.3 × 105 M− 1
) and Zn2+ (1.7 × 103 M− 1
) influenced conformational changes in the
protein tetrapyrrole chromophore without affecting R-PE structure and stability (colour). The results give new
insights into the stability of R-PE suggesting its usefulness for the replacement of toxic synthetic dyes. Preservation of the red colour of R-PE could be considered in fortified food and beverages by HP processing. R-PE may
act as a biosensor for Cu2+ in aquatic systems.",
publisher = "Elsevier",
journal = "Food Chemistry",
title = "Probing the stability of the food colourant R-phycoerythrin from dried Nori flakes",
volume = "374",
number = "131780",
doi = "10.1016/j.foodchem.2021.131780"
}

Simović, A., Combet, S., Ćirković-Veličković, T., Nikolic, M.,& Minić, S. L.. (2022). Probing the stability of the food colourant R-phycoerythrin from dried Nori flakes. in Food Chemistry
Elsevier., 374(131780).
https://doi.org/10.1016/j.foodchem.2021.131780

Simović A, Combet S, Ćirković-Veličković T, Nikolic M, Minić SL. Probing the stability of the food colourant R-phycoerythrin from dried Nori flakes. in Food Chemistry. 2022;374(131780).
doi:10.1016/j.foodchem.2021.131780 .

Simović, Ana, Combet, Sophie, Ćirković-Veličković, Tanja, Nikolic, Milan, Minić, Simeon L., "Probing the stability of the food colourant R-phycoerythrin from dried Nori flakes" in Food Chemistry, 374, no. 131780 (2022),
https://doi.org/10.1016/j.foodchem.2021.131780 . .

TY  - DATA
AU  - Simović, Ana
AU  - Combet, Sophie
AU  - Ćirković-Veličković, Tanja
AU  - Nikolic, Milan
AU  - Minić, Simeon L.
PY  - 2022
UR  - http://cherry.chem.bg.ac.rs/handle/123456789/5003
PB  - Elsevier
T2  - Food Chemistry
T1  - Supplementary data for the article: Simović, A.; Combet, S.; Ćirković-Veličković, T.; Nikolic, M.; Minić, S. L. Probing the Stability of the Food Colourant R-Phycoerythrin from Dried Nori Flakes. Food Chemistry 2022, 374 (131780). https://doi.org/10.1016/j.foodchem.2021.131780.
UR  - https://hdl.handle.net/21.15107/rcub_cherry_5003
ER  - 

@misc{
author = "Simović, Ana and Combet, Sophie and Ćirković-Veličković, Tanja and Nikolic, Milan and Minić, Simeon L.",
year = "2022",
publisher = "Elsevier",
journal = "Food Chemistry",
title = "Supplementary data for the article: Simović, A.; Combet, S.; Ćirković-Veličković, T.; Nikolic, M.; Minić, S. L. Probing the Stability of the Food Colourant R-Phycoerythrin from Dried Nori Flakes. Food Chemistry 2022, 374 (131780). https://doi.org/10.1016/j.foodchem.2021.131780.",
url = "https://hdl.handle.net/21.15107/rcub_cherry_5003"
}

Simović, A., Combet, S., Ćirković-Veličković, T., Nikolic, M.,& Minić, S. L.. (2022). Supplementary data for the article: Simović, A.; Combet, S.; Ćirković-Veličković, T.; Nikolic, M.; Minić, S. L. Probing the Stability of the Food Colourant R-Phycoerythrin from Dried Nori Flakes. Food Chemistry 2022, 374 (131780). https://doi.org/10.1016/j.foodchem.2021.131780.. in Food Chemistry
Elsevier..
https://hdl.handle.net/21.15107/rcub_cherry_5003

Simović A, Combet S, Ćirković-Veličković T, Nikolic M, Minić SL. Supplementary data for the article: Simović, A.; Combet, S.; Ćirković-Veličković, T.; Nikolic, M.; Minić, S. L. Probing the Stability of the Food Colourant R-Phycoerythrin from Dried Nori Flakes. Food Chemistry 2022, 374 (131780). https://doi.org/10.1016/j.foodchem.2021.131780.. in Food Chemistry. 2022;.
https://hdl.handle.net/21.15107/rcub_cherry_5003 .

Simović, Ana, Combet, Sophie, Ćirković-Veličković, Tanja, Nikolic, Milan, Minić, Simeon L., "Supplementary data for the article: Simović, A.; Combet, S.; Ćirković-Veličković, T.; Nikolic, M.; Minić, S. L. Probing the Stability of the Food Colourant R-Phycoerythrin from Dried Nori Flakes. Food Chemistry 2022, 374 (131780). https://doi.org/10.1016/j.foodchem.2021.131780." in Food Chemistry (2022),
https://hdl.handle.net/21.15107/rcub_cherry_5003 .

TY  - CONF
AU  - Simović, Ana
AU  - Combet, Sophie
AU  - Ćirković-Veličković, Tanja
AU  - Nikolic, Milan
AU  - Minic, Simeon
PY  - 2022
UR  - http://cherry.chem.bg.ac.rs/handle/123456789/5133
AB  - The high content of vitamins, minerals, antioxidants, and proteins makes red algae Porphyra sp. (Nori) superfood with exceptional health-promoting benefits. Its intense colour originates from R-phycoerythrin (R-PE), phycobiliprotein containing covalently attached tetrapyrrole chromophores: red phycoerythrobilin and orange phycourobilin. The present study aims to characterize the stability of R-PE, a natural colourant with a high potential for application in the food, cosmetic, and pharmaceutical industries. We purified R-PE from dried Nori flakes with a high purity ratio (A560 /A280 ≥5). Far-UV CD spectroscopic showed that α-helix is the dominant secondary structure (75%). The thermal unfolding of α-helix revealed two transitions (Tm1 and Tm2 at 56 and 72°C, respectively), ascribed to the different subunits of R-PE. Absorption measurements showed that high pressure (HP) induces dissociation of R-PE into subunits followed by subunit unfolding. Contrary to temperature, HP treatment showed a significant advantage under applied conditions: the protein unfolding is partly reversible, and the R-PE colour bleaching is minimized. Based on the fluorescence quenching approach, R-PE's binding affinities for Cu2+ and Zn2+ ions were 6.27x105 and 1.71x103 M-1, respectively. Absorption and near-UV/VIS CD spectroscopy suggested conformational changes in protein chromophores upon metal ions binding. Far-UV CD spectroscopy did not reveal that metal binding affects R-PE structure. The obtained results give new insights into the stability of R-PE with a good use-value in replacement of toxic synthetic dyes, preservation of R-PE red colour in fortified food and beverages by HP processing, and as a biosensor for Cu2+ in aquatic life systems.
Acknowledgments: This study was financially supported by the Ministry of Education, Science and Technological Development of the Republic of Serbia, Contract number: 451-03-9/2021-14/200168 and the European Commission, under the Horizon2020, FoodEnTwin Project, GA No. 810752.
PB  - Sociedade Portuguesa de Química
C3  - Book of Abstracts of the XXI EuroFoodChem Congress, 22-24 November 2021, On-line conference
T1  - Probing the stability of the food colourant R-phycoerythrin from dried Nori flakes
SP  - 138
EP  - 138
UR  - https://hdl.handle.net/21.15107/rcub_cherry_5133
ER  - 

@conference{
author = "Simović, Ana and Combet, Sophie and Ćirković-Veličković, Tanja and Nikolic, Milan and Minic, Simeon",
year = "2022",
abstract = "The high content of vitamins, minerals, antioxidants, and proteins makes red algae Porphyra sp. (Nori) superfood with exceptional health-promoting benefits. Its intense colour originates from R-phycoerythrin (R-PE), phycobiliprotein containing covalently attached tetrapyrrole chromophores: red phycoerythrobilin and orange phycourobilin. The present study aims to characterize the stability of R-PE, a natural colourant with a high potential for application in the food, cosmetic, and pharmaceutical industries. We purified R-PE from dried Nori flakes with a high purity ratio (A560 /A280 ≥5). Far-UV CD spectroscopic showed that α-helix is the dominant secondary structure (75%). The thermal unfolding of α-helix revealed two transitions (Tm1 and Tm2 at 56 and 72°C, respectively), ascribed to the different subunits of R-PE. Absorption measurements showed that high pressure (HP) induces dissociation of R-PE into subunits followed by subunit unfolding. Contrary to temperature, HP treatment showed a significant advantage under applied conditions: the protein unfolding is partly reversible, and the R-PE colour bleaching is minimized. Based on the fluorescence quenching approach, R-PE's binding affinities for Cu2+ and Zn2+ ions were 6.27x105 and 1.71x103 M-1, respectively. Absorption and near-UV/VIS CD spectroscopy suggested conformational changes in protein chromophores upon metal ions binding. Far-UV CD spectroscopy did not reveal that metal binding affects R-PE structure. The obtained results give new insights into the stability of R-PE with a good use-value in replacement of toxic synthetic dyes, preservation of R-PE red colour in fortified food and beverages by HP processing, and as a biosensor for Cu2+ in aquatic life systems.
Acknowledgments: This study was financially supported by the Ministry of Education, Science and Technological Development of the Republic of Serbia, Contract number: 451-03-9/2021-14/200168 and the European Commission, under the Horizon2020, FoodEnTwin Project, GA No. 810752.",
publisher = "Sociedade Portuguesa de Química",
journal = "Book of Abstracts of the XXI EuroFoodChem Congress, 22-24 November 2021, On-line conference",
title = "Probing the stability of the food colourant R-phycoerythrin from dried Nori flakes",
pages = "138-138",
url = "https://hdl.handle.net/21.15107/rcub_cherry_5133"
}

Simović, A., Combet, S., Ćirković-Veličković, T., Nikolic, M.,& Minic, S.. (2022). Probing the stability of the food colourant R-phycoerythrin from dried Nori flakes. in Book of Abstracts of the XXI EuroFoodChem Congress, 22-24 November 2021, On-line conference
Sociedade Portuguesa de Química., 138-138.
https://hdl.handle.net/21.15107/rcub_cherry_5133

Simović A, Combet S, Ćirković-Veličković T, Nikolic M, Minic S. Probing the stability of the food colourant R-phycoerythrin from dried Nori flakes. in Book of Abstracts of the XXI EuroFoodChem Congress, 22-24 November 2021, On-line conference. 2022;:138-138.
https://hdl.handle.net/21.15107/rcub_cherry_5133 .

Simović, Ana, Combet, Sophie, Ćirković-Veličković, Tanja, Nikolic, Milan, Minic, Simeon, "Probing the stability of the food colourant R-phycoerythrin from dried Nori flakes" in Book of Abstracts of the XXI EuroFoodChem Congress, 22-24 November 2021, On-line conference (2022):138-138,
https://hdl.handle.net/21.15107/rcub_cherry_5133 .

TY  - JOUR
AU  - Đukić, Teodora
AU  - Mladenović, Maja
AU  - Stanić-Vučinić, Dragana
AU  - Radosavljević, Jelena
AU  - Smiljanić, Katarina
AU  - Sabljić, Ljiljana
AU  - Dević, Marija
AU  - Ćujić, Danica R.
AU  - Vasović, Tamara
AU  - Simović, Ana
AU  - Radomirović, Mirjana Ž.
AU  - Ćirković-Veličković, Tanja
PY  - 2021
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/4330
AB  - Serological testing is important method for diagnosis of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection. Nucleocapsid (N) protein is the most abundant virus derived protein and strong immunogen. We aimed to find its efficient, low-cost production.

SARS-CoV-2 recombinant fragment of nucleocapsid protein (rfNP; 58–419 aa) was expressed in E. coli in soluble form, purified and characterized biochemically and immunologically.

Purified rfNP has secondary structure of full-length recombinant N protein, with high percentage of disordered structure (34.2%) and of β-sheet (40.7%). rfNP was tested in immunoblot using sera of COVID-19 convalescent patients. ELISA was optimized with sera of RT-PCR confirmed positive symptomatic patients and healthy individuals. IgG detection sensitivity was 96% (47/50) and specificity 97% (67/68), while IgM detection was slightly lower (94% and 96.5%, respectively).

Cost-effective approach for soluble recombinant N protein fragment production was developed, with reliable IgG and IgM antibodies detection of SARS-CoV-2 infection.
PB  - Elsevier
T2  - Virology journal
T1  - Expression, purification and immunological characterization of recombinant nucleocapsid protein fragment from SARS-CoV-2
VL  - 557
SP  - 15
EP  - 22
DO  - 10.1016/j.virol.2021.01.004
ER  - 

@article{
author = "Đukić, Teodora and Mladenović, Maja and Stanić-Vučinić, Dragana and Radosavljević, Jelena and Smiljanić, Katarina and Sabljić, Ljiljana and Dević, Marija and Ćujić, Danica R. and Vasović, Tamara and Simović, Ana and Radomirović, Mirjana Ž. and Ćirković-Veličković, Tanja",
year = "2021",
abstract = "Serological testing is important method for diagnosis of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection. Nucleocapsid (N) protein is the most abundant virus derived protein and strong immunogen. We aimed to find its efficient, low-cost production.

SARS-CoV-2 recombinant fragment of nucleocapsid protein (rfNP; 58–419 aa) was expressed in E. coli in soluble form, purified and characterized biochemically and immunologically.

Purified rfNP has secondary structure of full-length recombinant N protein, with high percentage of disordered structure (34.2%) and of β-sheet (40.7%). rfNP was tested in immunoblot using sera of COVID-19 convalescent patients. ELISA was optimized with sera of RT-PCR confirmed positive symptomatic patients and healthy individuals. IgG detection sensitivity was 96% (47/50) and specificity 97% (67/68), while IgM detection was slightly lower (94% and 96.5%, respectively).

Cost-effective approach for soluble recombinant N protein fragment production was developed, with reliable IgG and IgM antibodies detection of SARS-CoV-2 infection.",
publisher = "Elsevier",
journal = "Virology journal",
title = "Expression, purification and immunological characterization of recombinant nucleocapsid protein fragment from SARS-CoV-2",
volume = "557",
pages = "15-22",
doi = "10.1016/j.virol.2021.01.004"
}

Đukić, T., Mladenović, M., Stanić-Vučinić, D., Radosavljević, J., Smiljanić, K., Sabljić, L., Dević, M., Ćujić, D. R., Vasović, T., Simović, A., Radomirović, M. Ž.,& Ćirković-Veličković, T.. (2021). Expression, purification and immunological characterization of recombinant nucleocapsid protein fragment from SARS-CoV-2. in Virology journal
Elsevier., 557, 15-22.
https://doi.org/10.1016/j.virol.2021.01.004

Đukić T, Mladenović M, Stanić-Vučinić D, Radosavljević J, Smiljanić K, Sabljić L, Dević M, Ćujić DR, Vasović T, Simović A, Radomirović MŽ, Ćirković-Veličković T. Expression, purification and immunological characterization of recombinant nucleocapsid protein fragment from SARS-CoV-2. in Virology journal. 2021;557:15-22.
doi:10.1016/j.virol.2021.01.004 .

Đukić, Teodora, Mladenović, Maja, Stanić-Vučinić, Dragana, Radosavljević, Jelena, Smiljanić, Katarina, Sabljić, Ljiljana, Dević, Marija, Ćujić, Danica R., Vasović, Tamara, Simović, Ana, Radomirović, Mirjana Ž., Ćirković-Veličković, Tanja, "Expression, purification and immunological characterization of recombinant nucleocapsid protein fragment from SARS-CoV-2" in Virology journal, 557 (2021):15-22,
https://doi.org/10.1016/j.virol.2021.01.004 . .

TY  - JOUR
AU  - Đukić, Teodora
AU  - Mladenović, Maja
AU  - Stanić-Vučinić, Dragana
AU  - Radosavljević, Jelena
AU  - Smiljanić, Katarina
AU  - Sabljić, Ljiljana
AU  - Dević, Marija
AU  - Ćujić, Danica R.
AU  - Vasović, Tamara
AU  - Simović, Ana
AU  - Radomirović, Mirjana Ž.
AU  - Ćirković-Veličković, Tanja
PY  - 2021
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/4331
AB  - Serological testing is important method for diagnosis of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection. Nucleocapsid (N) protein is the most abundant virus derived protein and strong immunogen. We aimed to find its efficient, low-cost production.SARS-CoV-2 recombinant fragment of nucleocapsid protein (rfNP; 58–419 aa) was expressed in E. coli in soluble form, purified and characterized biochemically and immunologically.Purified rfNP has secondary structure of full-length recombinant N protein, with high percentage of disordered structure (34.2%) and of β-sheet (40.7%). rfNP was tested in immunoblot using sera of COVID-19 convalescent patients. ELISA was optimized with sera of RT-PCR confirmed positive symptomatic patients and healthy individuals. IgG detection sensitivity was 96% (47/50) and specificity 97% (67/68), while IgM detection was slightly lower (94% and 96.5%, respectively).Cost-effective approach for soluble recombinant N protein fragment production was developed, with reliable IgG and IgM antibodies detection of SARS-CoV-2 infection.
PB  - Elsevier
T2  - Virology journal
T1  - Expression, purification and immunological characterization of recombinant nucleocapsid protein fragment from SARS-CoV-2
VL  - 557
SP  - 15
EP  - 22
DO  - 10.1016/j.virol.2021.01.004
ER  - 

@article{
author = "Đukić, Teodora and Mladenović, Maja and Stanić-Vučinić, Dragana and Radosavljević, Jelena and Smiljanić, Katarina and Sabljić, Ljiljana and Dević, Marija and Ćujić, Danica R. and Vasović, Tamara and Simović, Ana and Radomirović, Mirjana Ž. and Ćirković-Veličković, Tanja",
year = "2021",
abstract = "Serological testing is important method for diagnosis of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection. Nucleocapsid (N) protein is the most abundant virus derived protein and strong immunogen. We aimed to find its efficient, low-cost production.SARS-CoV-2 recombinant fragment of nucleocapsid protein (rfNP; 58–419 aa) was expressed in E. coli in soluble form, purified and characterized biochemically and immunologically.Purified rfNP has secondary structure of full-length recombinant N protein, with high percentage of disordered structure (34.2%) and of β-sheet (40.7%). rfNP was tested in immunoblot using sera of COVID-19 convalescent patients. ELISA was optimized with sera of RT-PCR confirmed positive symptomatic patients and healthy individuals. IgG detection sensitivity was 96% (47/50) and specificity 97% (67/68), while IgM detection was slightly lower (94% and 96.5%, respectively).Cost-effective approach for soluble recombinant N protein fragment production was developed, with reliable IgG and IgM antibodies detection of SARS-CoV-2 infection.",
publisher = "Elsevier",
journal = "Virology journal",
title = "Expression, purification and immunological characterization of recombinant nucleocapsid protein fragment from SARS-CoV-2",
volume = "557",
pages = "15-22",
doi = "10.1016/j.virol.2021.01.004"
}

Đukić, T., Mladenović, M., Stanić-Vučinić, D., Radosavljević, J., Smiljanić, K., Sabljić, L., Dević, M., Ćujić, D. R., Vasović, T., Simović, A., Radomirović, M. Ž.,& Ćirković-Veličković, T.. (2021). Expression, purification and immunological characterization of recombinant nucleocapsid protein fragment from SARS-CoV-2. in Virology journal
Elsevier., 557, 15-22.
https://doi.org/10.1016/j.virol.2021.01.004

Đukić T, Mladenović M, Stanić-Vučinić D, Radosavljević J, Smiljanić K, Sabljić L, Dević M, Ćujić DR, Vasović T, Simović A, Radomirović MŽ, Ćirković-Veličković T. Expression, purification and immunological characterization of recombinant nucleocapsid protein fragment from SARS-CoV-2. in Virology journal. 2021;557:15-22.
doi:10.1016/j.virol.2021.01.004 .

Đukić, Teodora, Mladenović, Maja, Stanić-Vučinić, Dragana, Radosavljević, Jelena, Smiljanić, Katarina, Sabljić, Ljiljana, Dević, Marija, Ćujić, Danica R., Vasović, Tamara, Simović, Ana, Radomirović, Mirjana Ž., Ćirković-Veličković, Tanja, "Expression, purification and immunological characterization of recombinant nucleocapsid protein fragment from SARS-CoV-2" in Virology journal, 557 (2021):15-22,
https://doi.org/10.1016/j.virol.2021.01.004 . .

TY  - CONF
AU  - Đukić, Teodora
AU  - Mladenović, Maja
AU  - Stanić-Vučinić, Dragana
AU  - Radosavljević, Jelena
AU  - Smiljanić, Katarina
AU  - Sabljić, Ljiljana
AU  - Gnjatović, Marija Lj.
AU  - Cujić, Danica
AU  - Vasović, Tamara
AU  - Simović, Ana
AU  - Radomirović, Mirjana Ž.
AU  - Ćirković-Veličković, Tanja
PY  - 2021
UR  - http://cherry.chem.bg.ac.rs/handle/123456789/5735
AB  - Serological testing is important method for diagnosis of severe acute respiratory syndrome coronavirus 2 (SARSCoV-2) infection and for assessment of immunological response after the vaccination. Nucleocapsid (N) protein is the most abundant virus protein and strong immunogen. The aim was develop efficient, low-cost production of N protein large fragment and to characterize it with bottom-up, high-resolution tandem mass spectrometry and immunologically.
SARS-CoV-2 recombinant fragment of nucleocapsid protein (rfNP; 58–419 aa) was expressed in E. coli in soluble form and purified by several chromatographic steps and was subjected to SDS-PAGE and in-gel digested with trypsin.
rfNP was tested in immunoblot using sera of COVID-19 convalescent patients. ELISA was optimized with sera of RT-PCR confirmed positive symptomatic patients and healthy individuals. IgG detection sensitivity was 96% (47/50) and specificity 97% (67/68), while IgM detection was slightly lower. Identity of rfNP was confirmed with high scores and peptide coverage above 80%. Estimation from the value of areas under ion extracted chromatographic curves is that only up to 0,03% of the total band protein quantity belongs to host proteins, while rfNP share is well above 99,9%, resulting in highly pure nucleocapsid protein preparation.
C3  - Proteomics and Metabolomics for Personalized Medicine, XV Italian Proteomics Association Annual Meeting, Catholic University of the Sacred Heart, Roma, Italy, 8th-10th September 2021
T1  - Proteomic and immunological characterization of recombinantly expressed nucleocapsid SARS-CoV 2 protein fragment in E. coli
SP  - 50
EP  - 50
UR  - https://hdl.handle.net/21.15107/rcub_cherry_5735
ER  - 

@conference{
author = "Đukić, Teodora and Mladenović, Maja and Stanić-Vučinić, Dragana and Radosavljević, Jelena and Smiljanić, Katarina and Sabljić, Ljiljana and Gnjatović, Marija Lj. and Cujić, Danica and Vasović, Tamara and Simović, Ana and Radomirović, Mirjana Ž. and Ćirković-Veličković, Tanja",
year = "2021",
abstract = "Serological testing is important method for diagnosis of severe acute respiratory syndrome coronavirus 2 (SARSCoV-2) infection and for assessment of immunological response after the vaccination. Nucleocapsid (N) protein is the most abundant virus protein and strong immunogen. The aim was develop efficient, low-cost production of N protein large fragment and to characterize it with bottom-up, high-resolution tandem mass spectrometry and immunologically.
SARS-CoV-2 recombinant fragment of nucleocapsid protein (rfNP; 58–419 aa) was expressed in E. coli in soluble form and purified by several chromatographic steps and was subjected to SDS-PAGE and in-gel digested with trypsin.
rfNP was tested in immunoblot using sera of COVID-19 convalescent patients. ELISA was optimized with sera of RT-PCR confirmed positive symptomatic patients and healthy individuals. IgG detection sensitivity was 96% (47/50) and specificity 97% (67/68), while IgM detection was slightly lower. Identity of rfNP was confirmed with high scores and peptide coverage above 80%. Estimation from the value of areas under ion extracted chromatographic curves is that only up to 0,03% of the total band protein quantity belongs to host proteins, while rfNP share is well above 99,9%, resulting in highly pure nucleocapsid protein preparation.",
journal = "Proteomics and Metabolomics for Personalized Medicine, XV Italian Proteomics Association Annual Meeting, Catholic University of the Sacred Heart, Roma, Italy, 8th-10th September 2021",
title = "Proteomic and immunological characterization of recombinantly expressed nucleocapsid SARS-CoV 2 protein fragment in E. coli",
pages = "50-50",
url = "https://hdl.handle.net/21.15107/rcub_cherry_5735"
}

Đukić, T., Mladenović, M., Stanić-Vučinić, D., Radosavljević, J., Smiljanić, K., Sabljić, L., Gnjatović, M. Lj., Cujić, D., Vasović, T., Simović, A., Radomirović, M. Ž.,& Ćirković-Veličković, T.. (2021). Proteomic and immunological characterization of recombinantly expressed nucleocapsid SARS-CoV 2 protein fragment in E. coli. in Proteomics and Metabolomics for Personalized Medicine, XV Italian Proteomics Association Annual Meeting, Catholic University of the Sacred Heart, Roma, Italy, 8th-10th September 2021, 50-50.
https://hdl.handle.net/21.15107/rcub_cherry_5735

Đukić T, Mladenović M, Stanić-Vučinić D, Radosavljević J, Smiljanić K, Sabljić L, Gnjatović ML, Cujić D, Vasović T, Simović A, Radomirović MŽ, Ćirković-Veličković T. Proteomic and immunological characterization of recombinantly expressed nucleocapsid SARS-CoV 2 protein fragment in E. coli. in Proteomics and Metabolomics for Personalized Medicine, XV Italian Proteomics Association Annual Meeting, Catholic University of the Sacred Heart, Roma, Italy, 8th-10th September 2021. 2021;:50-50.
https://hdl.handle.net/21.15107/rcub_cherry_5735 .

Đukić, Teodora, Mladenović, Maja, Stanić-Vučinić, Dragana, Radosavljević, Jelena, Smiljanić, Katarina, Sabljić, Ljiljana, Gnjatović, Marija Lj., Cujić, Danica, Vasović, Tamara, Simović, Ana, Radomirović, Mirjana Ž., Ćirković-Veličković, Tanja, "Proteomic and immunological characterization of recombinantly expressed nucleocapsid SARS-CoV 2 protein fragment in E. coli" in Proteomics and Metabolomics for Personalized Medicine, XV Italian Proteomics Association Annual Meeting, Catholic University of the Sacred Heart, Roma, Italy, 8th-10th September 2021 (2021):50-50,
https://hdl.handle.net/21.15107/rcub_cherry_5735 .

TY  - CONF
AU  - Gnjatović, Marija Lj.
AU  - Đukić, Teodora
AU  - Stanić-Vučinić, Dragana
AU  - Radosavljević, Jelena
AU  - Smiljanić, Katarina
AU  - Vasović, Tamara
AU  - Simović, Ana
AU  - Mladenović, Maja
AU  - Radomirović, Mirjana Ž.
AU  - Ćirković-Veličković, Tanja
AU  - Ćujić, Danica R.
PY  - 2021
UR  - http://cherry.chem.bg.ac.rs/handle/123456789/5767
AB  - The COVID-19 diagnostic tools are categorized into two main groups of Nucleic Acid (NA)-
based and protein-based tests. To date, nucleic acid-based detection has been announced as the
gold-standard strategy for coronavirus detection; however, protein-based tests are promising
alternatives for rapid and large-scale screening of susceptible groups. During the first months, no
rapid and reliable detecting tool was readily available to adequatly respond to the requirement of
massive testing. The aim was to develope cost-effective, sensitive and rapid screening
mechanisms for the detection of immune response to SARS-CoV2 (which causes COVID-19),
based on the principle of ELISA. The institute INEP has developed tests for detection of IgM
and IgG SARS-CoV-2 specific antibodies based on S and N proteins of virus intended to monitor
different phases of natural infection, ELISA test for IgG detection in naturale infection based on
the use of exclusively domestic components of the ELISA kit (including proteins produced in
Serbia, Faculty of Chemistry) and a test specifically designed to monitor the effects of
immunization (determination of IgG antibodies specific for the RBD domain of S protein). The
tests were independently validated at the relevant laboratories in the country and abroad, and
compared to an FDA/WHO approved tests of a major test producers. All testing for validation
was carried out on samples collected before COVID19 (negative controls), PCR confirmed
COVID19 samples (positive controls) and potencialy cross-reactive samples (other pathogens
and autoimmune diseases). The antibody tests showed high levels of sensitivity and specificity
and extremely low background noises. The kits are extremely stable, have a shelf life of 1 year
and opened kits are usable up to 3 months at storing temperatures of 5°C
PB  - Univerzitet u Beogradu - Hemijski fakultet
C3  - Book of Abstracts of the 3rd Workshop FoodenTwin 2021, Belgrade 15 June
T1  - Serological Elisa test development at the INEP Institute
SP  - 18
EP  - 18
UR  - https://hdl.handle.net/21.15107/rcub_cherry_5767
ER  - 

@conference{
author = "Gnjatović, Marija Lj. and Đukić, Teodora and Stanić-Vučinić, Dragana and Radosavljević, Jelena and Smiljanić, Katarina and Vasović, Tamara and Simović, Ana and Mladenović, Maja and Radomirović, Mirjana Ž. and Ćirković-Veličković, Tanja and Ćujić, Danica R.",
year = "2021",
abstract = "The COVID-19 diagnostic tools are categorized into two main groups of Nucleic Acid (NA)-
based and protein-based tests. To date, nucleic acid-based detection has been announced as the
gold-standard strategy for coronavirus detection; however, protein-based tests are promising
alternatives for rapid and large-scale screening of susceptible groups. During the first months, no
rapid and reliable detecting tool was readily available to adequatly respond to the requirement of
massive testing. The aim was to develope cost-effective, sensitive and rapid screening
mechanisms for the detection of immune response to SARS-CoV2 (which causes COVID-19),
based on the principle of ELISA. The institute INEP has developed tests for detection of IgM
and IgG SARS-CoV-2 specific antibodies based on S and N proteins of virus intended to monitor
different phases of natural infection, ELISA test for IgG detection in naturale infection based on
the use of exclusively domestic components of the ELISA kit (including proteins produced in
Serbia, Faculty of Chemistry) and a test specifically designed to monitor the effects of
immunization (determination of IgG antibodies specific for the RBD domain of S protein). The
tests were independently validated at the relevant laboratories in the country and abroad, and
compared to an FDA/WHO approved tests of a major test producers. All testing for validation
was carried out on samples collected before COVID19 (negative controls), PCR confirmed
COVID19 samples (positive controls) and potencialy cross-reactive samples (other pathogens
and autoimmune diseases). The antibody tests showed high levels of sensitivity and specificity
and extremely low background noises. The kits are extremely stable, have a shelf life of 1 year
and opened kits are usable up to 3 months at storing temperatures of 5°C",
publisher = "Univerzitet u Beogradu - Hemijski fakultet",
journal = "Book of Abstracts of the 3rd Workshop FoodenTwin 2021, Belgrade 15 June",
title = "Serological Elisa test development at the INEP Institute",
pages = "18-18",
url = "https://hdl.handle.net/21.15107/rcub_cherry_5767"
}

Gnjatović, M. Lj., Đukić, T., Stanić-Vučinić, D., Radosavljević, J., Smiljanić, K., Vasović, T., Simović, A., Mladenović, M., Radomirović, M. Ž., Ćirković-Veličković, T.,& Ćujić, D. R.. (2021). Serological Elisa test development at the INEP Institute. in Book of Abstracts of the 3rd Workshop FoodenTwin 2021, Belgrade 15 June
Univerzitet u Beogradu - Hemijski fakultet., 18-18.
https://hdl.handle.net/21.15107/rcub_cherry_5767

Gnjatović ML, Đukić T, Stanić-Vučinić D, Radosavljević J, Smiljanić K, Vasović T, Simović A, Mladenović M, Radomirović MŽ, Ćirković-Veličković T, Ćujić DR. Serological Elisa test development at the INEP Institute. in Book of Abstracts of the 3rd Workshop FoodenTwin 2021, Belgrade 15 June. 2021;:18-18.
https://hdl.handle.net/21.15107/rcub_cherry_5767 .

Gnjatović, Marija Lj., Đukić, Teodora, Stanić-Vučinić, Dragana, Radosavljević, Jelena, Smiljanić, Katarina, Vasović, Tamara, Simović, Ana, Mladenović, Maja, Radomirović, Mirjana Ž., Ćirković-Veličković, Tanja, Ćujić, Danica R., "Serological Elisa test development at the INEP Institute" in Book of Abstracts of the 3rd Workshop FoodenTwin 2021, Belgrade 15 June (2021):18-18,
https://hdl.handle.net/21.15107/rcub_cherry_5767 .

TY  - CONF
AU  - Simović, Ana
AU  - Radomirović, Mirjana Ž.
AU  - Gligorijević, Nikola
AU  - Stanić-Vučinić, Dragana
AU  - Ćirković-Veličković, Tanja
PY  - 2021
UR  - http://cherry.chem.bg.ac.rs/handle/123456789/5132
AB  - Algae have been consumed as food and medicine for centuries. Their benefits are so pronounced, due to high concentrations of vitamins, minerals, antioxidants and proteins that they are commonly referred to as superfoods. Phycocyanobilin (PCB) is a bioactive compound of microalga Spirulina platensis. It is a blue tetrapyrrole chromophore of C-phycocyanin (C-PC), the major chromoprotein of this microalga. It is covalently attached to cysteine residues of C-PC via thioether bond. The outbreak of Coronavirus Disease 2019 (COVID-19) has posed a serious threat to global public health, calling for the development of safe and effective prophylactics and therapeutics against infection of its causative agent, severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). The SARS-CoV-2 spike (S) protein plays the most important roles in viral attachment, fusion and entry, and it serves as a target for development of antibodies, entry inhibitors and vaccines. It mediates viral entry into host cells by first binding to a host angiotensin-converting enzyme 2 (ACE2) receptor through the receptor-binding domain (RBD) and then fusing the viral and host membranes. This study aimed to investigate interaction of bioactive PCB with S protein and RBD respectively.
Combination of electrophoretic techniques and fluorescence spectroscopy was employed in order to examine interactions of PCB and S protein, as well as interactions of PCB and RBD, while the effects of PCB binding on RBD structure were studied by CD spectroscopy.
SDS-PAGE with Zn2+ staining has revealed that PCB covalently binds to both S protein and RBD, via free cysteine residues. Binding constants determined by fluorescence quenching method were: 2.1 x 107 M–1 for PCB and S protein, and 8.4 x 104 M–1 for PCB and RBD. Far-UV circular dichroism spectra showed that PCB influences RBD structure.
Our results support the importance of further research on covalent binding of PCB to S protein and RBD and its implications. Due to its interaction with S protein and RBD, PCB may exert one of its many bioactive effects via impact on S protein binding to ACE2 receptor.
Acknowledgments: This project has received funding from the European Union’s Horizon 2020 research and innovation program under grant agreement No. 810752.
References:
[1] S. Minic, M. Radomirovic, N. Savkovic et al., Food Chemistry, 269(2018) 43-52.
[2] W. Tai, L. He, X. Zhang et al., Cellular & Molecular Immunology, 17(2020) 613-620.
PB  - Sociedade Portuguesa de Química
C3  - Book of Abstracts of the XXI EuroFoodChem Congress, 22-24 November 2021, On-line conference
T1  - Interaction of SARS-CoV-2 Spike protein with phycocyanobilin
SP  - 164
EP  - 164
UR  - https://hdl.handle.net/21.15107/rcub_cherry_5132
ER  - 

@conference{
author = "Simović, Ana and Radomirović, Mirjana Ž. and Gligorijević, Nikola and Stanić-Vučinić, Dragana and Ćirković-Veličković, Tanja",
year = "2021",
abstract = "Algae have been consumed as food and medicine for centuries. Their benefits are so pronounced, due to high concentrations of vitamins, minerals, antioxidants and proteins that they are commonly referred to as superfoods. Phycocyanobilin (PCB) is a bioactive compound of microalga Spirulina platensis. It is a blue tetrapyrrole chromophore of C-phycocyanin (C-PC), the major chromoprotein of this microalga. It is covalently attached to cysteine residues of C-PC via thioether bond. The outbreak of Coronavirus Disease 2019 (COVID-19) has posed a serious threat to global public health, calling for the development of safe and effective prophylactics and therapeutics against infection of its causative agent, severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). The SARS-CoV-2 spike (S) protein plays the most important roles in viral attachment, fusion and entry, and it serves as a target for development of antibodies, entry inhibitors and vaccines. It mediates viral entry into host cells by first binding to a host angiotensin-converting enzyme 2 (ACE2) receptor through the receptor-binding domain (RBD) and then fusing the viral and host membranes. This study aimed to investigate interaction of bioactive PCB with S protein and RBD respectively.
Combination of electrophoretic techniques and fluorescence spectroscopy was employed in order to examine interactions of PCB and S protein, as well as interactions of PCB and RBD, while the effects of PCB binding on RBD structure were studied by CD spectroscopy.
SDS-PAGE with Zn2+ staining has revealed that PCB covalently binds to both S protein and RBD, via free cysteine residues. Binding constants determined by fluorescence quenching method were: 2.1 x 107 M–1 for PCB and S protein, and 8.4 x 104 M–1 for PCB and RBD. Far-UV circular dichroism spectra showed that PCB influences RBD structure.
Our results support the importance of further research on covalent binding of PCB to S protein and RBD and its implications. Due to its interaction with S protein and RBD, PCB may exert one of its many bioactive effects via impact on S protein binding to ACE2 receptor.
Acknowledgments: This project has received funding from the European Union’s Horizon 2020 research and innovation program under grant agreement No. 810752.
References:
[1] S. Minic, M. Radomirovic, N. Savkovic et al., Food Chemistry, 269(2018) 43-52.
[2] W. Tai, L. He, X. Zhang et al., Cellular & Molecular Immunology, 17(2020) 613-620.",
publisher = "Sociedade Portuguesa de Química",
journal = "Book of Abstracts of the XXI EuroFoodChem Congress, 22-24 November 2021, On-line conference",
title = "Interaction of SARS-CoV-2 Spike protein with phycocyanobilin",
pages = "164-164",
url = "https://hdl.handle.net/21.15107/rcub_cherry_5132"
}

Simović, A., Radomirović, M. Ž., Gligorijević, N., Stanić-Vučinić, D.,& Ćirković-Veličković, T.. (2021). Interaction of SARS-CoV-2 Spike protein with phycocyanobilin. in Book of Abstracts of the XXI EuroFoodChem Congress, 22-24 November 2021, On-line conference
Sociedade Portuguesa de Química., 164-164.
https://hdl.handle.net/21.15107/rcub_cherry_5132

Simović A, Radomirović MŽ, Gligorijević N, Stanić-Vučinić D, Ćirković-Veličković T. Interaction of SARS-CoV-2 Spike protein with phycocyanobilin. in Book of Abstracts of the XXI EuroFoodChem Congress, 22-24 November 2021, On-line conference. 2021;:164-164.
https://hdl.handle.net/21.15107/rcub_cherry_5132 .

Simović, Ana, Radomirović, Mirjana Ž., Gligorijević, Nikola, Stanić-Vučinić, Dragana, Ćirković-Veličković, Tanja, "Interaction of SARS-CoV-2 Spike protein with phycocyanobilin" in Book of Abstracts of the XXI EuroFoodChem Congress, 22-24 November 2021, On-line conference (2021):164-164,
https://hdl.handle.net/21.15107/rcub_cherry_5132 .

TY  - JOUR
AU  - Peruško, Marija
AU  - Ghnimi, Sami
AU  - Simović, Ana
AU  - Stevanović, Nikola R.
AU  - Radomirović, Mirjana Ž.
AU  - Gharsallaoui, Adem
AU  - Smiljanić, Katarina
AU  - Van Haute, Sam
AU  - Stanić-Vučinić, Dragana
AU  - Ćirković-Veličković, Tanja
PY  - 2021
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/4333
AB  - Demand for camel milk (CM) is increasing worldwide, due to its high nutritious value and health benefits. In this study, whole CM powders were produced by spray drying (SD) at six inlet temperatures (190 °C–250 °C) and by freeze drying (FD). Physicochemical and functional properties of CM powder proteins were investigated. SD at higher inlet temperatures (230 °C–250 °C) resulted in higher extent of Maillard reaction (MR), in comparison to lower temperatures (190 °C–200 °C) and FD treatment. Both treatments had negative effect on casein solubility, while whey proteins remained soluble and slightly increased its solubility with the extent of MR. The CM powders obtained at higher inlet temperatures demonstrated improved antioxidant activity. Secondary structure of whey proteins did not differ among the samples, while surface hydrophobicity of whey proteins was higher in all SD than in FD samples, suggesting only limited denaturation of camel whey proteins at higher inlet temperatures of drying. Thus, the effects of SD under the conditions applied in our study did not decrease camel whey protein solubility, while drying procedure itself regardless of temperature decreased solubility of camel milk caseins. MR generated during CM processing could be an important means of compensating for the lack of antioxidant protection normally associated with β-lactoglobulin but happens to be absent from this milk.
PB  - Elsevier
T2  - LWT
T1  - Maillard reaction products formation and antioxidative power of spray dried camel milk powders increases with the inlet temperature of drying
VL  - 143
SP  - 111091
DO  - 10.1016/j.lwt.2021.111091
ER  - 

@article{
author = "Peruško, Marija and Ghnimi, Sami and Simović, Ana and Stevanović, Nikola R. and Radomirović, Mirjana Ž. and Gharsallaoui, Adem and Smiljanić, Katarina and Van Haute, Sam and Stanić-Vučinić, Dragana and Ćirković-Veličković, Tanja",
year = "2021",
abstract = "Demand for camel milk (CM) is increasing worldwide, due to its high nutritious value and health benefits. In this study, whole CM powders were produced by spray drying (SD) at six inlet temperatures (190 °C–250 °C) and by freeze drying (FD). Physicochemical and functional properties of CM powder proteins were investigated. SD at higher inlet temperatures (230 °C–250 °C) resulted in higher extent of Maillard reaction (MR), in comparison to lower temperatures (190 °C–200 °C) and FD treatment. Both treatments had negative effect on casein solubility, while whey proteins remained soluble and slightly increased its solubility with the extent of MR. The CM powders obtained at higher inlet temperatures demonstrated improved antioxidant activity. Secondary structure of whey proteins did not differ among the samples, while surface hydrophobicity of whey proteins was higher in all SD than in FD samples, suggesting only limited denaturation of camel whey proteins at higher inlet temperatures of drying. Thus, the effects of SD under the conditions applied in our study did not decrease camel whey protein solubility, while drying procedure itself regardless of temperature decreased solubility of camel milk caseins. MR generated during CM processing could be an important means of compensating for the lack of antioxidant protection normally associated with β-lactoglobulin but happens to be absent from this milk.",
publisher = "Elsevier",
journal = "LWT",
title = "Maillard reaction products formation and antioxidative power of spray dried camel milk powders increases with the inlet temperature of drying",
volume = "143",
pages = "111091",
doi = "10.1016/j.lwt.2021.111091"
}

Peruško, M., Ghnimi, S., Simović, A., Stevanović, N. R., Radomirović, M. Ž., Gharsallaoui, A., Smiljanić, K., Van Haute, S., Stanić-Vučinić, D.,& Ćirković-Veličković, T.. (2021). Maillard reaction products formation and antioxidative power of spray dried camel milk powders increases with the inlet temperature of drying. in LWT
Elsevier., 143, 111091.
https://doi.org/10.1016/j.lwt.2021.111091

Peruško M, Ghnimi S, Simović A, Stevanović NR, Radomirović MŽ, Gharsallaoui A, Smiljanić K, Van Haute S, Stanić-Vučinić D, Ćirković-Veličković T. Maillard reaction products formation and antioxidative power of spray dried camel milk powders increases with the inlet temperature of drying. in LWT. 2021;143:111091.
doi:10.1016/j.lwt.2021.111091 .

Peruško, Marija, Ghnimi, Sami, Simović, Ana, Stevanović, Nikola R., Radomirović, Mirjana Ž., Gharsallaoui, Adem, Smiljanić, Katarina, Van Haute, Sam, Stanić-Vučinić, Dragana, Ćirković-Veličković, Tanja, "Maillard reaction products formation and antioxidative power of spray dried camel milk powders increases with the inlet temperature of drying" in LWT, 143 (2021):111091,
https://doi.org/10.1016/j.lwt.2021.111091 . .

TY  - DATA
AU  - Peruško, Marija
AU  - Ghnimi, Sami
AU  - Simović, Ana
AU  - Stevanović, Nikola R.
AU  - Radomirović, Mirjana Ž.
AU  - Gharsallaoui, Adem
AU  - Smiljanić, Katarina
AU  - Van Haute, Sam
AU  - Stanić-Vučinić, Dragana
AU  - Ćirković-Veličković, Tanja
PY  - 2021
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/4334
PB  - Elsevier
T2  - LWT
T1  - Supplementary data for the article: Perusko, M.; Ghnimi, S.; Simovic, A.; Stevanovic, N.; Radomirovic, M.; Gharsallaoui, A.; Smiljanic, K.; Van Haute, S.; Stanic-Vucinic, D.; Cirkovic Velickovic, T. Maillard Reaction Products Formation and Antioxidative Power of Spray Dried Camel Milk Powders Increases with the Inlet Temperature of Drying. LWT 2021, 143, 111091. https://doi.org/10.1016/j.lwt.2021.111091.
UR  - https://hdl.handle.net/21.15107/rcub_cherry_4334
ER  - 

@misc{
author = "Peruško, Marija and Ghnimi, Sami and Simović, Ana and Stevanović, Nikola R. and Radomirović, Mirjana Ž. and Gharsallaoui, Adem and Smiljanić, Katarina and Van Haute, Sam and Stanić-Vučinić, Dragana and Ćirković-Veličković, Tanja",
year = "2021",
publisher = "Elsevier",
journal = "LWT",
title = "Supplementary data for the article: Perusko, M.; Ghnimi, S.; Simovic, A.; Stevanovic, N.; Radomirovic, M.; Gharsallaoui, A.; Smiljanic, K.; Van Haute, S.; Stanic-Vucinic, D.; Cirkovic Velickovic, T. Maillard Reaction Products Formation and Antioxidative Power of Spray Dried Camel Milk Powders Increases with the Inlet Temperature of Drying. LWT 2021, 143, 111091. https://doi.org/10.1016/j.lwt.2021.111091.",
url = "https://hdl.handle.net/21.15107/rcub_cherry_4334"
}

Peruško, M., Ghnimi, S., Simović, A., Stevanović, N. R., Radomirović, M. Ž., Gharsallaoui, A., Smiljanić, K., Van Haute, S., Stanić-Vučinić, D.,& Ćirković-Veličković, T.. (2021). Supplementary data for the article: Perusko, M.; Ghnimi, S.; Simovic, A.; Stevanovic, N.; Radomirovic, M.; Gharsallaoui, A.; Smiljanic, K.; Van Haute, S.; Stanic-Vucinic, D.; Cirkovic Velickovic, T. Maillard Reaction Products Formation and Antioxidative Power of Spray Dried Camel Milk Powders Increases with the Inlet Temperature of Drying. LWT 2021, 143, 111091. https://doi.org/10.1016/j.lwt.2021.111091.. in LWT
Elsevier..
https://hdl.handle.net/21.15107/rcub_cherry_4334

Peruško M, Ghnimi S, Simović A, Stevanović NR, Radomirović MŽ, Gharsallaoui A, Smiljanić K, Van Haute S, Stanić-Vučinić D, Ćirković-Veličković T. Supplementary data for the article: Perusko, M.; Ghnimi, S.; Simovic, A.; Stevanovic, N.; Radomirovic, M.; Gharsallaoui, A.; Smiljanic, K.; Van Haute, S.; Stanic-Vucinic, D.; Cirkovic Velickovic, T. Maillard Reaction Products Formation and Antioxidative Power of Spray Dried Camel Milk Powders Increases with the Inlet Temperature of Drying. LWT 2021, 143, 111091. https://doi.org/10.1016/j.lwt.2021.111091.. in LWT. 2021;.
https://hdl.handle.net/21.15107/rcub_cherry_4334 .

Peruško, Marija, Ghnimi, Sami, Simović, Ana, Stevanović, Nikola R., Radomirović, Mirjana Ž., Gharsallaoui, Adem, Smiljanić, Katarina, Van Haute, Sam, Stanić-Vučinić, Dragana, Ćirković-Veličković, Tanja, "Supplementary data for the article: Perusko, M.; Ghnimi, S.; Simovic, A.; Stevanovic, N.; Radomirovic, M.; Gharsallaoui, A.; Smiljanic, K.; Van Haute, S.; Stanic-Vucinic, D.; Cirkovic Velickovic, T. Maillard Reaction Products Formation and Antioxidative Power of Spray Dried Camel Milk Powders Increases with the Inlet Temperature of Drying. LWT 2021, 143, 111091. https://doi.org/10.1016/j.lwt.2021.111091." in LWT (2021),
https://hdl.handle.net/21.15107/rcub_cherry_4334 .

TY  - JOUR
AU  - Peruško, Marija
AU  - Ghnimi, Sami
AU  - Simović, Ana
AU  - Stevanović, Nikola R.
AU  - Radomirović, Mirjana Ž.
AU  - Gharsallaoui, Adem
AU  - Smiljanić, Katarina
AU  - Van Haute, Sam
AU  - Stanić-Vučinić, Dragana
AU  - Ćirković-Veličković, Tanja
PY  - 2021
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/4332
AB  - Demand for camel milk (CM) is increasing worldwide, due to its high nutritious value and health benefits. In this study, whole CM powders were produced by spray drying (SD) at six inlet temperatures (190 °C–250 °C) and by freeze drying (FD). Physicochemical and functional properties of CM powder proteins were investigated. SD at higher inlet temperatures (230 °C–250 °C) resulted in higher extent of Maillard reaction (MR), in comparison to lower temperatures (190 °C–200 °C) and FD treatment. Both treatments had negative effect on casein solubility, while whey proteins remained soluble and slightly increased its solubility with the extent of MR. The CM powders obtained at higher inlet temperatures demonstrated improved antioxidant activity. Secondary structure of whey proteins did not differ among the samples, while surface hydrophobicity of whey proteins was higher in all SD than in FD samples, suggesting only limited denaturation of camel whey proteins at higher inlet temperatures of drying. Thus, the effects of SD under the conditions applied in our study did not decrease camel whey protein solubility, while drying procedure itself regardless of temperature decreased solubility of camel milk caseins. MR generated during CM processing could be an important means of compensating for the lack of antioxidant protection normally associated with β-lactoglobulin but happens to be absent from this milk.
PB  - Elsevier
T2  - LWT
T1  - Maillard reaction products formation and antioxidative power of spray dried camel milk powders increases with the inlet temperature of drying
VL  - 143
SP  - 111091
DO  - 10.1016/j.lwt.2021.111091
ER  - 

@article{
author = "Peruško, Marija and Ghnimi, Sami and Simović, Ana and Stevanović, Nikola R. and Radomirović, Mirjana Ž. and Gharsallaoui, Adem and Smiljanić, Katarina and Van Haute, Sam and Stanić-Vučinić, Dragana and Ćirković-Veličković, Tanja",
year = "2021",
abstract = "Demand for camel milk (CM) is increasing worldwide, due to its high nutritious value and health benefits. In this study, whole CM powders were produced by spray drying (SD) at six inlet temperatures (190 °C–250 °C) and by freeze drying (FD). Physicochemical and functional properties of CM powder proteins were investigated. SD at higher inlet temperatures (230 °C–250 °C) resulted in higher extent of Maillard reaction (MR), in comparison to lower temperatures (190 °C–200 °C) and FD treatment. Both treatments had negative effect on casein solubility, while whey proteins remained soluble and slightly increased its solubility with the extent of MR. The CM powders obtained at higher inlet temperatures demonstrated improved antioxidant activity. Secondary structure of whey proteins did not differ among the samples, while surface hydrophobicity of whey proteins was higher in all SD than in FD samples, suggesting only limited denaturation of camel whey proteins at higher inlet temperatures of drying. Thus, the effects of SD under the conditions applied in our study did not decrease camel whey protein solubility, while drying procedure itself regardless of temperature decreased solubility of camel milk caseins. MR generated during CM processing could be an important means of compensating for the lack of antioxidant protection normally associated with β-lactoglobulin but happens to be absent from this milk.",
publisher = "Elsevier",
journal = "LWT",
title = "Maillard reaction products formation and antioxidative power of spray dried camel milk powders increases with the inlet temperature of drying",
volume = "143",
pages = "111091",
doi = "10.1016/j.lwt.2021.111091"
}

Peruško, M., Ghnimi, S., Simović, A., Stevanović, N. R., Radomirović, M. Ž., Gharsallaoui, A., Smiljanić, K., Van Haute, S., Stanić-Vučinić, D.,& Ćirković-Veličković, T.. (2021). Maillard reaction products formation and antioxidative power of spray dried camel milk powders increases with the inlet temperature of drying. in LWT
Elsevier., 143, 111091.
https://doi.org/10.1016/j.lwt.2021.111091

Peruško M, Ghnimi S, Simović A, Stevanović NR, Radomirović MŽ, Gharsallaoui A, Smiljanić K, Van Haute S, Stanić-Vučinić D, Ćirković-Veličković T. Maillard reaction products formation and antioxidative power of spray dried camel milk powders increases with the inlet temperature of drying. in LWT. 2021;143:111091.
doi:10.1016/j.lwt.2021.111091 .

Peruško, Marija, Ghnimi, Sami, Simović, Ana, Stevanović, Nikola R., Radomirović, Mirjana Ž., Gharsallaoui, Adem, Smiljanić, Katarina, Van Haute, Sam, Stanić-Vučinić, Dragana, Ćirković-Veličković, Tanja, "Maillard reaction products formation and antioxidative power of spray dried camel milk powders increases with the inlet temperature of drying" in LWT, 143 (2021):111091,
https://doi.org/10.1016/j.lwt.2021.111091 . .

TY  - CONF
AU  - Peruško, Marija
AU  - Simović, Ana
AU  - Stevanović, Nikola R.
AU  - Radomirović, Mirjana Ž.
AU  - Smiljanić, Katarina
AU  - Stanić-Vučinić, Dragana
AU  - Ghnimi, Sami
AU  - Ćirković-Veličković, Tanja
PY  - 2020
UR  - http://cherry.chem.bg.ac.rs/handle/123456789/5130
AB  - Objective. Camel milk is highly nutritious food with many health benefits proposed. Demand for camel milk has increased worldwide. Production of camel milk powders facilitate its transport, prolonge shelf-life, and also offer an attractive additive for various food products. In this study we examined the effect of freeze/spray drying treatment for camel milk powder production, on physiochemical and functional properties of camel milk proteins.
Material and Methods. Whole camel milk powders were prepared by spray drying treatment at six different inlet temperatures (190°C - 250°C) or by freeze drying. The soluble protein fractions upon the treatments were analysed by combination of electrophoretic and spectroscopic techniques. Structural and functional properties of camel milk proteins such as Maillard reaction products formation, antioxidant activity and protein solubility were assessed.
Results. SDS-PAGE revealed non-uniform increase in Mw of major protein bands, while native electrophoresis revealed non-uniform decrease in pI values with increased inlet temperature of spray drying. That indicated attachement of lactose moieties to NH2-group of proteins via non-enzymatic Maillard reaction. Spectrophotometric analysis showed formation of intermediate Maillard reaction products (increased absorbance at 294 nm) and no detectable late Maillard reaction products formation. Higher inlet temperatures (230°C - 250°C) resulted in higher protein carbonyls formation and lower content of free amino groups as a result of Maillard reaction. Far-UV circular dichroism spectra showed no differences in secondary structures between freeze and spray dried samples. Antioxidant activity and protein solubility were increased with increase in inlet temperature.
Conclusions. Our results showed that spray drying treatment promotes non-enzymatic glycation of camel milk proteins and exert significant effects on the techno-functional properties of CM powder such as nutritional value and shelf life. Thus, optimization of spray drying parametars is essential for production of high quality camel milk powders.
Acknowledgments: This work was supported by the Ministry of Education, Science and Technological Development of the Republic of Serbia, grant number 172024. The project leading to this application has received funding from the European Union's Horizon 2020 research and innovation programme under grant agreement No 810752.
C3  - 2nd FoodEnTwin Workshop Experimental anlimal models for food and environment, February 3-4, 2020, Vienna, Austria
T1  - Higher degree of Maillard reaction induced by spray drying at high temperatures increases antioxidant activity of camel milk proteins
SP  - 6
EP  - 7
UR  - https://hdl.handle.net/21.15107/rcub_cherry_5130
ER  - 

@conference{
author = "Peruško, Marija and Simović, Ana and Stevanović, Nikola R. and Radomirović, Mirjana Ž. and Smiljanić, Katarina and Stanić-Vučinić, Dragana and Ghnimi, Sami and Ćirković-Veličković, Tanja",
year = "2020",
abstract = "Objective. Camel milk is highly nutritious food with many health benefits proposed. Demand for camel milk has increased worldwide. Production of camel milk powders facilitate its transport, prolonge shelf-life, and also offer an attractive additive for various food products. In this study we examined the effect of freeze/spray drying treatment for camel milk powder production, on physiochemical and functional properties of camel milk proteins.
Material and Methods. Whole camel milk powders were prepared by spray drying treatment at six different inlet temperatures (190°C - 250°C) or by freeze drying. The soluble protein fractions upon the treatments were analysed by combination of electrophoretic and spectroscopic techniques. Structural and functional properties of camel milk proteins such as Maillard reaction products formation, antioxidant activity and protein solubility were assessed.
Results. SDS-PAGE revealed non-uniform increase in Mw of major protein bands, while native electrophoresis revealed non-uniform decrease in pI values with increased inlet temperature of spray drying. That indicated attachement of lactose moieties to NH2-group of proteins via non-enzymatic Maillard reaction. Spectrophotometric analysis showed formation of intermediate Maillard reaction products (increased absorbance at 294 nm) and no detectable late Maillard reaction products formation. Higher inlet temperatures (230°C - 250°C) resulted in higher protein carbonyls formation and lower content of free amino groups as a result of Maillard reaction. Far-UV circular dichroism spectra showed no differences in secondary structures between freeze and spray dried samples. Antioxidant activity and protein solubility were increased with increase in inlet temperature.
Conclusions. Our results showed that spray drying treatment promotes non-enzymatic glycation of camel milk proteins and exert significant effects on the techno-functional properties of CM powder such as nutritional value and shelf life. Thus, optimization of spray drying parametars is essential for production of high quality camel milk powders.
Acknowledgments: This work was supported by the Ministry of Education, Science and Technological Development of the Republic of Serbia, grant number 172024. The project leading to this application has received funding from the European Union's Horizon 2020 research and innovation programme under grant agreement No 810752.",
journal = "2nd FoodEnTwin Workshop Experimental anlimal models for food and environment, February 3-4, 2020, Vienna, Austria",
title = "Higher degree of Maillard reaction induced by spray drying at high temperatures increases antioxidant activity of camel milk proteins",
pages = "6-7",
url = "https://hdl.handle.net/21.15107/rcub_cherry_5130"
}

Peruško, M., Simović, A., Stevanović, N. R., Radomirović, M. Ž., Smiljanić, K., Stanić-Vučinić, D., Ghnimi, S.,& Ćirković-Veličković, T.. (2020). Higher degree of Maillard reaction induced by spray drying at high temperatures increases antioxidant activity of camel milk proteins. in 2nd FoodEnTwin Workshop Experimental anlimal models for food and environment, February 3-4, 2020, Vienna, Austria, 6-7.
https://hdl.handle.net/21.15107/rcub_cherry_5130

Peruško M, Simović A, Stevanović NR, Radomirović MŽ, Smiljanić K, Stanić-Vučinić D, Ghnimi S, Ćirković-Veličković T. Higher degree of Maillard reaction induced by spray drying at high temperatures increases antioxidant activity of camel milk proteins. in 2nd FoodEnTwin Workshop Experimental anlimal models for food and environment, February 3-4, 2020, Vienna, Austria. 2020;:6-7.
https://hdl.handle.net/21.15107/rcub_cherry_5130 .

Peruško, Marija, Simović, Ana, Stevanović, Nikola R., Radomirović, Mirjana Ž., Smiljanić, Katarina, Stanić-Vučinić, Dragana, Ghnimi, Sami, Ćirković-Veličković, Tanja, "Higher degree of Maillard reaction induced by spray drying at high temperatures increases antioxidant activity of camel milk proteins" in 2nd FoodEnTwin Workshop Experimental anlimal models for food and environment, February 3-4, 2020, Vienna, Austria (2020):6-7,
https://hdl.handle.net/21.15107/rcub_cherry_5130 .

TY  - CONF
AU  - Peruško, Marija
AU  - Simović, Ana
AU  - Stevanović, Nikola R.
AU  - Smiljanić, Katarina
AU  - Radomirović, Mirjana Ž.
AU  - Stanić-Vučinić, Dragana
AU  - Ghnimi, Sami
AU  - Ćirković-Veličković, Tanja
PY  - 2019
UR  - http://cherry.chem.bg.ac.rs/handle/123456789/5131
AB  - Objective. Camel milk is highly nutritious food with numerous health benefits
proposed. Demand for camel milk has increased worldwide. Production of camel milk
powders facilitate its transport, prolonge shelf-life, and also offer an attractive additive
for various food products. In this study we characterized proteins of soluble fraction of
freeze/spray dried camel milk powders.
Material and Methods. Whole camel milk powders were prepared by spray drying
treatment at six different inlet temperatures (190°C - 250°C) or by freeze drying. The
soluble protein fractions upon the treatments were analysed by combination of
electrophoretic and spectroscopic techniques. Functional properties, such as
antioxidant activity and protein solubility were assessed.
Results. SDS-PAGE revealed non-uniform increase in Mw of major protein bands, while
native electrophoresis revealed non-uniform decrease in pI values with increased inlet
temperature of spray drying. That indicated attachement of lactose moieties to NH2-
group of proteins via non-enzymatic Maillard reaction. Spectrophotometric analysis
showed formation of intermediate Maillard reaction products (increased absorbance at
294 nm) and no detectable late Maillard reaction products formation. Far-UV circular
dichroism spectra showed no differences in secondary structures between freeze and
spray dried samples. Antioxidant activity and protein solubility were increased with
increase in inlet temperature.
Conclusions. Our results showed that spray drying treatment promoted non-enzymatic
glycation of camel milk proteins. Glycation of food proteins affects their technofunctional
properties, shelf-life and nutritional value. Thus, optimization of spray
drying parametars is essential for production of high quality camel milk powders.
Acknowledgements: This research work was funded the Ministry of Education and Science of the Republic
of Serbia, GA No. OI172024, Ghent University Global Campus, Belgian Special Research Fund BOF StG No.
01N01718, Serbian Academy of Sciences and Arts Project F-26. The project leading to this application
has received funding from the European Union's Horizon 2020 research and innovation programme under
grant agreement No 810752.
C3  - 1st FoodEnTwin Workshop “Food and Environmental -Omics”, Book of Abstracts, June 20-21, 2019, Belgrade, Serbia
T1  - Physicochemical characterization of soluble proteins of whole camel milk powders produced by spray drying treatment at high temperatures
SP  - 27
EP  - 27
UR  - https://hdl.handle.net/21.15107/rcub_cherry_5131
ER  - 

@conference{
author = "Peruško, Marija and Simović, Ana and Stevanović, Nikola R. and Smiljanić, Katarina and Radomirović, Mirjana Ž. and Stanić-Vučinić, Dragana and Ghnimi, Sami and Ćirković-Veličković, Tanja",
year = "2019",
abstract = "Objective. Camel milk is highly nutritious food with numerous health benefits
proposed. Demand for camel milk has increased worldwide. Production of camel milk
powders facilitate its transport, prolonge shelf-life, and also offer an attractive additive
for various food products. In this study we characterized proteins of soluble fraction of
freeze/spray dried camel milk powders.
Material and Methods. Whole camel milk powders were prepared by spray drying
treatment at six different inlet temperatures (190°C - 250°C) or by freeze drying. The
soluble protein fractions upon the treatments were analysed by combination of
electrophoretic and spectroscopic techniques. Functional properties, such as
antioxidant activity and protein solubility were assessed.
Results. SDS-PAGE revealed non-uniform increase in Mw of major protein bands, while
native electrophoresis revealed non-uniform decrease in pI values with increased inlet
temperature of spray drying. That indicated attachement of lactose moieties to NH2-
group of proteins via non-enzymatic Maillard reaction. Spectrophotometric analysis
showed formation of intermediate Maillard reaction products (increased absorbance at
294 nm) and no detectable late Maillard reaction products formation. Far-UV circular
dichroism spectra showed no differences in secondary structures between freeze and
spray dried samples. Antioxidant activity and protein solubility were increased with
increase in inlet temperature.
Conclusions. Our results showed that spray drying treatment promoted non-enzymatic
glycation of camel milk proteins. Glycation of food proteins affects their technofunctional
properties, shelf-life and nutritional value. Thus, optimization of spray
drying parametars is essential for production of high quality camel milk powders.
Acknowledgements: This research work was funded the Ministry of Education and Science of the Republic
of Serbia, GA No. OI172024, Ghent University Global Campus, Belgian Special Research Fund BOF StG No.
01N01718, Serbian Academy of Sciences and Arts Project F-26. The project leading to this application
has received funding from the European Union's Horizon 2020 research and innovation programme under
grant agreement No 810752.",
journal = "1st FoodEnTwin Workshop “Food and Environmental -Omics”, Book of Abstracts, June 20-21, 2019, Belgrade, Serbia",
title = "Physicochemical characterization of soluble proteins of whole camel milk powders produced by spray drying treatment at high temperatures",
pages = "27-27",
url = "https://hdl.handle.net/21.15107/rcub_cherry_5131"
}

Peruško, M., Simović, A., Stevanović, N. R., Smiljanić, K., Radomirović, M. Ž., Stanić-Vučinić, D., Ghnimi, S.,& Ćirković-Veličković, T.. (2019). Physicochemical characterization of soluble proteins of whole camel milk powders produced by spray drying treatment at high temperatures. in 1st FoodEnTwin Workshop “Food and Environmental -Omics”, Book of Abstracts, June 20-21, 2019, Belgrade, Serbia, 27-27.
https://hdl.handle.net/21.15107/rcub_cherry_5131

Peruško M, Simović A, Stevanović NR, Smiljanić K, Radomirović MŽ, Stanić-Vučinić D, Ghnimi S, Ćirković-Veličković T. Physicochemical characterization of soluble proteins of whole camel milk powders produced by spray drying treatment at high temperatures. in 1st FoodEnTwin Workshop “Food and Environmental -Omics”, Book of Abstracts, June 20-21, 2019, Belgrade, Serbia. 2019;:27-27.
https://hdl.handle.net/21.15107/rcub_cherry_5131 .

Peruško, Marija, Simović, Ana, Stevanović, Nikola R., Smiljanić, Katarina, Radomirović, Mirjana Ž., Stanić-Vučinić, Dragana, Ghnimi, Sami, Ćirković-Veličković, Tanja, "Physicochemical characterization of soluble proteins of whole camel milk powders produced by spray drying treatment at high temperatures" in 1st FoodEnTwin Workshop “Food and Environmental -Omics”, Book of Abstracts, June 20-21, 2019, Belgrade, Serbia (2019):27-27,
https://hdl.handle.net/21.15107/rcub_cherry_5131 .