Redox-Regulation of α-Globin in Vascular Physiology.
Redox-Regulation of α-Globin in Vascular Physiology.
复制标题
血管生理学中α-珠蛋白的氧化还原调节
DOI:
10.3390/antiox11010159
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发表时间:
2022-01-14
期刊:
影响因子:
--
通讯作者:
Lechauve C
中科院分区:
文献类型:
--
作者:
Kiger L;Keith J;Freiwan A;Fernandez AG;Tillman H;Isakson BE;Weiss MJ;Lechauve C
Interest in the structure, function, and evolutionary relations of circulating and intracellular globins dates back more than 60 years to the first determination of the three-dimensional structure of these proteins. Non-erythrocytic globins have been implicated in circulatory control through reactions that couple nitric oxide (NO) signaling with cellular oxygen availability and redox status. Small artery endothelial cells (ECs) express free α-globin, which causes vasoconstriction by degrading NO. This reaction converts reduced (Fe2+) α-globin to the oxidized (Fe3+) form, which is unstable, cytotoxic, and unable to degrade NO. Therefore, (Fe3+) α-globin must be stabilized and recycled to (Fe2+) α-globin to reinitiate the catalytic cycle. The molecular chaperone α-hemoglobin-stabilizing protein (AHSP) binds (Fe3+) α-globin to inhibit its degradation and facilitate its reduction. The mechanisms that reduce (Fe3+) α-globin in ECs are unknown, although endothelial nitric oxide synthase (eNOS) and cytochrome b5 reductase (CyB5R3) with cytochrome b5 type A (CyB5a) can reduce (Fe3+) α-globin in solution. Here, we examine the expression and cellular localization of eNOS, CyB5a, and CyB5R3 in mouse arterial ECs and show that α-globin can be reduced by either of two independent redox systems, CyB5R3/CyB5a and eNOS. Together, our findings provide new insights into the regulation of blood vessel contractility.
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DOI:
10.1073/pnas.0308657101
发表时间:
2004-04-27
影响因子:
11.1
作者:
Freitas, TAK;Hou, SB;Alam, M
通讯作者:
Alam, M
影响因子:
3.6
作者:
Henderson, Colin J.;McLaughlin, Lesley A.;Wolf, C. Roland
通讯作者:
Wolf, C. Roland
影响因子:
2.9
作者:
Eich, RF;Li, TS;Olson, JS
通讯作者:
Olson, JS
影响因子:
64.5
作者:
Feng, L;Gell, DA;Shi, YG
通讯作者:
Shi, YG
影响因子:
4.8
作者:
Haque, Mohammad Mahfuzul;Tejero, Jesus;Stuehr, Dennis J.
通讯作者:
Stuehr, Dennis J.