TY  - JOUR
AU  - Stojsavljević, Aleksandar
AU  - Ristić‑Medić, Danijela
AU  - Krstić, Đurđa D.
AU  - Rovčanin, Branislav
AU  - Radjen, Slavica
AU  - Terzić, Brankica
AU  - Manojlović, Dragan D.
PY  - 2022
UR  - http://cherry.chem.bg.ac.rs/handle/123456789/5195
AB  - The status of essential and toxic trace elements in patients with different stages of chronic kidney disease (CKD) is still
unclear and not well characterized. The present study examined the circulatory levels of a wide panel of trace elements (Al,
Cr, Mn, Co, Ni, Cu, Zn, As, Se, Rb, Sr, Cd, Pb, and U) in hemodialysis patients (HD group) and pre-dialysis patients with
stage 3 CKD (PD group). Comparisons were made between groups of patients and healthy individuals from the control group
(CG). The levels of Al, Mn, Co, Ni, Cu, As, Se, Sr, and Pb were higher, while the levels of Cr, Zn, Rb, Cd, and U were lower
in HD patients than in our CG. Higher levels of Al and Se, as well as lower levels of As, Sr, Zn, Rb, and U were significant
and distinguished HD from PD. Among other analyzed elements, Co, Se, and U are the only trace elements that did not
distinguish PD from CG at a statistically significant level. The HD group had lower serum U levels than the PD group, and
this could be a result of hemodialysis. This study also revealed that the Cu/Zn ratio could be used as a marker for early and
late detection of renal failure. Marked changes of essential and toxic trace element levels in sera indicate additional pathophysiological
events in CKD, which could additionally contribute to the preexisting increased morbidity of HD patients.
Measurement of trace elements in HD patients should be performed routinely.
PB  - Springer
T2  - Biological Trace Element Research
T1  - Circulatory Imbalance of Essential and Toxic Trace Elements in Pre‑dialysis and Hemodialysis Patients
VL  - 200
SP  - 3117
EP  - 3125
DO  - 10.1007/s12011-021-02940-7
ER  - 

@article{
author = "Stojsavljević, Aleksandar and Ristić‑Medić, Danijela and Krstić, Đurđa D. and Rovčanin, Branislav and Radjen, Slavica and Terzić, Brankica and Manojlović, Dragan D.",
year = "2022",
abstract = "The status of essential and toxic trace elements in patients with different stages of chronic kidney disease (CKD) is still
unclear and not well characterized. The present study examined the circulatory levels of a wide panel of trace elements (Al,
Cr, Mn, Co, Ni, Cu, Zn, As, Se, Rb, Sr, Cd, Pb, and U) in hemodialysis patients (HD group) and pre-dialysis patients with
stage 3 CKD (PD group). Comparisons were made between groups of patients and healthy individuals from the control group
(CG). The levels of Al, Mn, Co, Ni, Cu, As, Se, Sr, and Pb were higher, while the levels of Cr, Zn, Rb, Cd, and U were lower
in HD patients than in our CG. Higher levels of Al and Se, as well as lower levels of As, Sr, Zn, Rb, and U were significant
and distinguished HD from PD. Among other analyzed elements, Co, Se, and U are the only trace elements that did not
distinguish PD from CG at a statistically significant level. The HD group had lower serum U levels than the PD group, and
this could be a result of hemodialysis. This study also revealed that the Cu/Zn ratio could be used as a marker for early and
late detection of renal failure. Marked changes of essential and toxic trace element levels in sera indicate additional pathophysiological
events in CKD, which could additionally contribute to the preexisting increased morbidity of HD patients.
Measurement of trace elements in HD patients should be performed routinely.",
publisher = "Springer",
journal = "Biological Trace Element Research",
title = "Circulatory Imbalance of Essential and Toxic Trace Elements in Pre‑dialysis and Hemodialysis Patients",
volume = "200",
pages = "3117-3125",
doi = "10.1007/s12011-021-02940-7"
}

Stojsavljević, A., Ristić‑Medić, D., Krstić, Đ. D., Rovčanin, B., Radjen, S., Terzić, B.,& Manojlović, D. D.. (2022). Circulatory Imbalance of Essential and Toxic Trace Elements in Pre‑dialysis and Hemodialysis Patients. in Biological Trace Element Research
Springer., 200, 3117-3125.
https://doi.org/10.1007/s12011-021-02940-7

Stojsavljević A, Ristić‑Medić D, Krstić ĐD, Rovčanin B, Radjen S, Terzić B, Manojlović DD. Circulatory Imbalance of Essential and Toxic Trace Elements in Pre‑dialysis and Hemodialysis Patients. in Biological Trace Element Research. 2022;200:3117-3125.
doi:10.1007/s12011-021-02940-7 .

Stojsavljević, Aleksandar, Ristić‑Medić, Danijela, Krstić, Đurđa D., Rovčanin, Branislav, Radjen, Slavica, Terzić, Brankica, Manojlović, Dragan D., "Circulatory Imbalance of Essential and Toxic Trace Elements in Pre‑dialysis and Hemodialysis Patients" in Biological Trace Element Research, 200 (2022):3117-3125,
https://doi.org/10.1007/s12011-021-02940-7 . .

TY  - JOUR
AU  - Takić, Marija M.
AU  - Zeković, Milica
AU  - Terzić, Brankica
AU  - Stojsavljević, Aleksandar
AU  - Mijusković, Mirjana
AU  - Rađen, Slavica
AU  - Ristić-Medić, Danijela
PY  - 2021
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/4738
AB  - Background: Desaturation and elongation are critical processes in endogenous metabolic fatty acid pathways. Zinc (Zn) is a cofactor for desaturases and elongases enzymes. There is limited evidence regarding the relationships between biomarkers of Zn status, nutritional intake, plasma phospholipid fatty acid profile and clinical outcomes among patients undergoing hemodialysis (HD).Objective: To examine the relationships between dietary and serum levels of Zn and Cu/Zn ratio and to explore associations of these micronutrients with PUFA profile and estimated desaturase and elongase enzyme activities in serum phospholipids among HD patients.Methods: This study included 40 adult patients undergoing hemodialysis treatment. Repeated 24-h recalls were applied for dietary intake assessment. Serum concentration of Zn and Cu were determined using inductively coupled plasma mass spectrometry and fatty acid composition by gas-liquid chromatography. Desaturase and elongase activities were calculated from product-precursor fatty acid ratios.Results: Inadequate dietary Zn intake was found in 55% of HD patients. They all had serum Zn concentration below the reference value of 60 μg/dL (mean 38.8 ± 7.72 μg/dL). Adequate zinc intake was accompanied with significantly higher intake of energy, total fats, SFA, MUFA and proteins. There was no correlation between Zn serum status and Zn intake estimates. Serum Cu/Zn ratio was high, (2.76 ± 0.68), directly and significantly associated with HD period, CRP, BMI, VFA, and inversely with Kt/V, albumin, iron, and iPTH. The n-6/n-3 ratio in plasma phospholipids was elevated (12.25 ± 3.45) and patients with inadequate Zn intake had lower n-3 PUFA intake and status compared to those with adequate intake. Serum Zn concentrations were inversely correlated with linoleic/dihomo-γ-linolenic acid ratio (LA/DGLA) (p = 0.037), related to D6-desaturase activity (p = 0.033) and directly with DGLA relative abundances (p = 0.024). Cu status was inversely associated with EPA level (p = 0.03) and estimates of elongase activity (p = 0.001). Furthermore, positive relationship was found between the Cu/Zn ratio and determined elongase value (p = 0.01).Conclusion: Findings of this study underpin the high prevalence of Zn deficiency and inadequate n-3 PUFA intake and status among subjects undergoing HD. The results obtained indicate that the assessment of Zn status should be a standard parameter of nutritional status screening in HD patients while emphasizing the importance of Cu/Zn determination. Although further research is warranted, Zn and-n-3 PUFA supplementation in HD patients might be beneficial for the prevention and attenuation of adverse health outcomes
PB  - Frontiers Media
T2  - Frontiers in Nutrition
T1  - Zinc Deficiency, Plasma Fatty Acid Profile and Desaturase Activities in Hemodialysis Patients: Is Supplementation Necessary?
VL  - 8
SP  - 688
DO  - 10.3389/fnut.2021.700450
ER  - 

@article{
author = "Takić, Marija M. and Zeković, Milica and Terzić, Brankica and Stojsavljević, Aleksandar and Mijusković, Mirjana and Rađen, Slavica and Ristić-Medić, Danijela",
year = "2021",
abstract = "Background: Desaturation and elongation are critical processes in endogenous metabolic fatty acid pathways. Zinc (Zn) is a cofactor for desaturases and elongases enzymes. There is limited evidence regarding the relationships between biomarkers of Zn status, nutritional intake, plasma phospholipid fatty acid profile and clinical outcomes among patients undergoing hemodialysis (HD).Objective: To examine the relationships between dietary and serum levels of Zn and Cu/Zn ratio and to explore associations of these micronutrients with PUFA profile and estimated desaturase and elongase enzyme activities in serum phospholipids among HD patients.Methods: This study included 40 adult patients undergoing hemodialysis treatment. Repeated 24-h recalls were applied for dietary intake assessment. Serum concentration of Zn and Cu were determined using inductively coupled plasma mass spectrometry and fatty acid composition by gas-liquid chromatography. Desaturase and elongase activities were calculated from product-precursor fatty acid ratios.Results: Inadequate dietary Zn intake was found in 55% of HD patients. They all had serum Zn concentration below the reference value of 60 μg/dL (mean 38.8 ± 7.72 μg/dL). Adequate zinc intake was accompanied with significantly higher intake of energy, total fats, SFA, MUFA and proteins. There was no correlation between Zn serum status and Zn intake estimates. Serum Cu/Zn ratio was high, (2.76 ± 0.68), directly and significantly associated with HD period, CRP, BMI, VFA, and inversely with Kt/V, albumin, iron, and iPTH. The n-6/n-3 ratio in plasma phospholipids was elevated (12.25 ± 3.45) and patients with inadequate Zn intake had lower n-3 PUFA intake and status compared to those with adequate intake. Serum Zn concentrations were inversely correlated with linoleic/dihomo-γ-linolenic acid ratio (LA/DGLA) (p = 0.037), related to D6-desaturase activity (p = 0.033) and directly with DGLA relative abundances (p = 0.024). Cu status was inversely associated with EPA level (p = 0.03) and estimates of elongase activity (p = 0.001). Furthermore, positive relationship was found between the Cu/Zn ratio and determined elongase value (p = 0.01).Conclusion: Findings of this study underpin the high prevalence of Zn deficiency and inadequate n-3 PUFA intake and status among subjects undergoing HD. The results obtained indicate that the assessment of Zn status should be a standard parameter of nutritional status screening in HD patients while emphasizing the importance of Cu/Zn determination. Although further research is warranted, Zn and-n-3 PUFA supplementation in HD patients might be beneficial for the prevention and attenuation of adverse health outcomes",
publisher = "Frontiers Media",
journal = "Frontiers in Nutrition",
title = "Zinc Deficiency, Plasma Fatty Acid Profile and Desaturase Activities in Hemodialysis Patients: Is Supplementation Necessary?",
volume = "8",
pages = "688",
doi = "10.3389/fnut.2021.700450"
}

Takić, M. M., Zeković, M., Terzić, B., Stojsavljević, A., Mijusković, M., Rađen, S.,& Ristić-Medić, D.. (2021). Zinc Deficiency, Plasma Fatty Acid Profile and Desaturase Activities in Hemodialysis Patients: Is Supplementation Necessary?. in Frontiers in Nutrition
Frontiers Media., 8, 688.
https://doi.org/10.3389/fnut.2021.700450

Takić MM, Zeković M, Terzić B, Stojsavljević A, Mijusković M, Rađen S, Ristić-Medić D. Zinc Deficiency, Plasma Fatty Acid Profile and Desaturase Activities in Hemodialysis Patients: Is Supplementation Necessary?. in Frontiers in Nutrition. 2021;8:688.
doi:10.3389/fnut.2021.700450 .

Takić, Marija M., Zeković, Milica, Terzić, Brankica, Stojsavljević, Aleksandar, Mijusković, Mirjana, Rađen, Slavica, Ristić-Medić, Danijela, "Zinc Deficiency, Plasma Fatty Acid Profile and Desaturase Activities in Hemodialysis Patients: Is Supplementation Necessary?" in Frontiers in Nutrition, 8 (2021):688,
https://doi.org/10.3389/fnut.2021.700450 . .