![FFH logo](/image/logo_ffh.png)
Please use this identifier to cite or link to this item:
https://dspace.ffh.bg.ac.rs/handle/123456789/223
Title: | Coordinate and redox interactions of epinephrine with ferric and ferrous iron at physiological pH | Authors: | Korać, Jelena Stanković, Dalibor M Stanić, Marina Bajuk-Bogdanović, Danica Žižić, Milan Bogdanović Pristov, Jelena Grgurić-Šipka, Sanja Popović Bijelić, Ana Spasojević, Ivan |
Issue Date: | 23-Feb-2018 | Journal: | Scientific reports | Abstract: | Coordinate and redox interactions of epinephrine (Epi) with iron at physiological pH are essential for understanding two very different phenomena - the detrimental effects of chronic stress on the cardiovascular system and the cross-linking of catecholamine-rich biopolymers and frameworks. Here we show that Epi and Fe3+ form stable high-spin complexes in the 1:1 or 3:1 stoichiometry, depending on the Epi/Fe3+ concentration ratio (low or high). Oxygen atoms on the catechol ring represent the sites of coordinate bond formation within physiologically relevant bidentate 1:1 complex. Redox properties of Epi are slightly impacted by Fe3+. On the other hand, Epi and Fe2+ form a complex that acts as a strong reducing agent, which leads to the production of hydrogen peroxide via O2 reduction, and to a facilitated formation of the Epi-Fe3+ complexes. Epi is not oxidized in this process, i.e. Fe2+ is not an electron shuttle, but the electron donor. Epi-catalyzed oxidation of Fe2+ represents a plausible chemical basis of stress-related damage to heart cells. In addition, our results support the previous findings on the interactions of catecholamine moieties in polymers with iron and provide a novel strategy for improving the efficiency of cross-linking. |
URI: | https://dspace.ffh.bg.ac.rs/handle/123456789/223 | DOI: | 10.1038/s41598-018-21940-7 |
Appears in Collections: | Journal Article |
Show full item record
SCOPUSTM
Citations
12
checked on Jun 29, 2024
Page view(s)
17
checked on Jul 1, 2024
Google ScholarTM
Check
Altmetric
Altmetric
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.