Ferrous iron binding to epinephrine promotes the oxidation of iron and impedes activation of adrenergic receptors
Samo za registrovane korisnike
2020
Autori
Korać Jačić, JelenaNikolić, Ljiljana
Stanković, Dalibor
Opačić, Miloš
Dimitrijević, Milena
Savić, Danijela
Grgurić-Šipka, Sanja
Spasojević, Ivan
Bogdanović Pristov, Jelena
Članak u časopisu (Objavljena verzija)
Metapodaci
Prikaz svih podataka o dokumentuApstrakt
Upon release in response to stress, epinephrine (Epi) may interact with labile iron pool in human plasma with potentially important (patho)physiological consequences. We have shown that Epi and Fe3+ build stable 1:1 high-spin bidentate complex at physiological pH, and that Epi does not undergo degradation in the presence of iron. However, the interactions of Epi with the more soluble Fe2+, and the impact of iron on biological activity of Epi are still not known. Herein we showed that Epi and Fe2+ build colorless complex which is stable under anaerobic conditions. In the presence of O2, Epi promoted the oxidation of Fe2+ and the formation of Epi-Fe3+ complex. Cyclic voltammetry showed that mid-point potential of Epi-Fe2+ complex is very low (−582 mV vs. standard hydrogen electrode), which explains catalyzed oxidation of Fe2+. Next, we examined the impact of iron binding on biological performance of Epi using patch clamping in cell culture with constitutive expression of adrenergic recep...tors. Epi alone evoked an increase of outward currents, whereas Epi in the complex with Fe3+ did not. This implies that the binding of Epi to adrenergic receptors and their activation is prevented by the formation of complex with iron. Pro-oxidative activity of Epi-Fe2+ complex may represent a link between chronic stress and cardiovascular problems. On the other hand, labile iron could serve as a modulator of biological activity of ligands. Such interactions may be important in human pathologies that are related to iron overload or deficiency.
Ključne reči:
Adrenaline / Adrenergic receptor / Labile iron pool / Ligand / Oxidative stress / Reduction potentialIzvor:
Free Radical Biology and Medicine, 2020, 148, 123-127Izdavač:
- Elsevier
Finansiranje / projekti:
- Ispitivanja odnosa struktura-funkcija u ćelijskom zidu biljaka i izmene strukture zida enzimskim inženjeringom (RS-MESTD-Basic Research (BR or ON)-173017)
- Uticaj magnetnih polja i drugih sredinskih stresora na fiziološke odgovore i ponašanje različitih vrsta (RS-MESTD-Basic Research (BR or ON)-173027)
DOI: 10.1016/j.freeradbiomed.2020.01.001
ISSN: 0891-5849
WoS: 000512981100012
Scopus: 2-s2.0-85077654318
Kolekcije
Institucija/grupa
Hemijski fakultet / Faculty of ChemistryTY - JOUR AU - Korać Jačić, Jelena AU - Nikolić, Ljiljana AU - Stanković, Dalibor AU - Opačić, Miloš AU - Dimitrijević, Milena AU - Savić, Danijela AU - Grgurić-Šipka, Sanja AU - Spasojević, Ivan AU - Bogdanović Pristov, Jelena PY - 2020 UR - https://cherry.chem.bg.ac.rs/handle/123456789/3809 AB - Upon release in response to stress, epinephrine (Epi) may interact with labile iron pool in human plasma with potentially important (patho)physiological consequences. We have shown that Epi and Fe3+ build stable 1:1 high-spin bidentate complex at physiological pH, and that Epi does not undergo degradation in the presence of iron. However, the interactions of Epi with the more soluble Fe2+, and the impact of iron on biological activity of Epi are still not known. Herein we showed that Epi and Fe2+ build colorless complex which is stable under anaerobic conditions. In the presence of O2, Epi promoted the oxidation of Fe2+ and the formation of Epi-Fe3+ complex. Cyclic voltammetry showed that mid-point potential of Epi-Fe2+ complex is very low (−582 mV vs. standard hydrogen electrode), which explains catalyzed oxidation of Fe2+. Next, we examined the impact of iron binding on biological performance of Epi using patch clamping in cell culture with constitutive expression of adrenergic receptors. Epi alone evoked an increase of outward currents, whereas Epi in the complex with Fe3+ did not. This implies that the binding of Epi to adrenergic receptors and their activation is prevented by the formation of complex with iron. Pro-oxidative activity of Epi-Fe2+ complex may represent a link between chronic stress and cardiovascular problems. On the other hand, labile iron could serve as a modulator of biological activity of ligands. Such interactions may be important in human pathologies that are related to iron overload or deficiency. PB - Elsevier T2 - Free Radical Biology and Medicine T1 - Ferrous iron binding to epinephrine promotes the oxidation of iron and impedes activation of adrenergic receptors VL - 148 SP - 123 EP - 127 DO - 10.1016/j.freeradbiomed.2020.01.001 ER -
@article{ author = "Korać Jačić, Jelena and Nikolić, Ljiljana and Stanković, Dalibor and Opačić, Miloš and Dimitrijević, Milena and Savić, Danijela and Grgurić-Šipka, Sanja and Spasojević, Ivan and Bogdanović Pristov, Jelena", year = "2020", abstract = "Upon release in response to stress, epinephrine (Epi) may interact with labile iron pool in human plasma with potentially important (patho)physiological consequences. We have shown that Epi and Fe3+ build stable 1:1 high-spin bidentate complex at physiological pH, and that Epi does not undergo degradation in the presence of iron. However, the interactions of Epi with the more soluble Fe2+, and the impact of iron on biological activity of Epi are still not known. Herein we showed that Epi and Fe2+ build colorless complex which is stable under anaerobic conditions. In the presence of O2, Epi promoted the oxidation of Fe2+ and the formation of Epi-Fe3+ complex. Cyclic voltammetry showed that mid-point potential of Epi-Fe2+ complex is very low (−582 mV vs. standard hydrogen electrode), which explains catalyzed oxidation of Fe2+. Next, we examined the impact of iron binding on biological performance of Epi using patch clamping in cell culture with constitutive expression of adrenergic receptors. Epi alone evoked an increase of outward currents, whereas Epi in the complex with Fe3+ did not. This implies that the binding of Epi to adrenergic receptors and their activation is prevented by the formation of complex with iron. Pro-oxidative activity of Epi-Fe2+ complex may represent a link between chronic stress and cardiovascular problems. On the other hand, labile iron could serve as a modulator of biological activity of ligands. Such interactions may be important in human pathologies that are related to iron overload or deficiency.", publisher = "Elsevier", journal = "Free Radical Biology and Medicine", title = "Ferrous iron binding to epinephrine promotes the oxidation of iron and impedes activation of adrenergic receptors", volume = "148", pages = "123-127", doi = "10.1016/j.freeradbiomed.2020.01.001" }
Korać Jačić, J., Nikolić, L., Stanković, D., Opačić, M., Dimitrijević, M., Savić, D., Grgurić-Šipka, S., Spasojević, I.,& Bogdanović Pristov, J.. (2020). Ferrous iron binding to epinephrine promotes the oxidation of iron and impedes activation of adrenergic receptors. in Free Radical Biology and Medicine Elsevier., 148, 123-127. https://doi.org/10.1016/j.freeradbiomed.2020.01.001
Korać Jačić J, Nikolić L, Stanković D, Opačić M, Dimitrijević M, Savić D, Grgurić-Šipka S, Spasojević I, Bogdanović Pristov J. Ferrous iron binding to epinephrine promotes the oxidation of iron and impedes activation of adrenergic receptors. in Free Radical Biology and Medicine. 2020;148:123-127. doi:10.1016/j.freeradbiomed.2020.01.001 .
Korać Jačić, Jelena, Nikolić, Ljiljana, Stanković, Dalibor, Opačić, Miloš, Dimitrijević, Milena, Savić, Danijela, Grgurić-Šipka, Sanja, Spasojević, Ivan, Bogdanović Pristov, Jelena, "Ferrous iron binding to epinephrine promotes the oxidation of iron and impedes activation of adrenergic receptors" in Free Radical Biology and Medicine, 148 (2020):123-127, https://doi.org/10.1016/j.freeradbiomed.2020.01.001 . .