Ethanol withdrawal hastens the aging of cytochrome c oxidase.
Ethanol withdrawal hastens the aging of cytochrome c oxidase.
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DOI:
10.1016/j.neurobiolaging.2011.02.002
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发表时间:
2012-03
影响因子:
4.2
通讯作者:
Simpkins JW
中科院分区:
文献类型:
--
作者:
Jung ME;Ju X;Metzger DB;Simpkins JW
We investigated whether abrupt ethanol withdrawal (EW) age-specifically inhibits a key mitochondrial enzyme, cytochrome c oxidase (COX), and whether estrogen mitigates this problem. We also tested whether this possible effect of EW involves a substrate (cytochrome c) deficiency that is associated with proapoptotic BAX and mitochondrial membrane swelling. Ovariectomized young, middle-age, and older rats, with or without 17β-estradiol (E2) implantation, underwent repeated EW. Cerebelli were collected to measure COX activity and the mitochondrial membrane swelling using spectrophotometry and the mitochondrial levels of cytochrome c and BAX using an immunoblot method. The loss of COX activity and the mitochondrial membrane swelling occurred only in older rats under control-diet conditions but occurred earlier, starting in the young rats under EW conditions. E2 treatment mitigated these EW effects. EW increased mitochondrial BAX particularly in middle-age rats but did not alter cytochrome c. Collectively EW hastens but E2 delays the age-associated loss of COX activity. This EW effect is independent of cytochrome c but may involve the mitochondrial overload of BAX and membrane vulnerability.
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影响因子:
4.2
作者:
Jung ME;Ju X;Simpkins JW;Metzger DB;Yan LJ;Wen Y
通讯作者:
Wen Y
DOI:
10.1073/pnas.94.8.3668
发表时间:
1997-04-15
影响因子:
11.1
作者:
Hsu, YT;Wolter, KG;Youle, RJ
通讯作者:
Youle, RJ
DOI:
10.1016/j.bbrc.2008.05.178
发表时间:
2008-08-15
影响因子:
3.1
作者:
Eun, So Young;Woo, Im Sun;Seo, Han Geuk
通讯作者:
Seo, Han Geuk
影响因子:
3.5
作者:
Manon, S;Chaudhuri, B;Guerin, M
通讯作者:
Guerin, M
DOI:
10.1124/jpet.108.146829
发表时间:
2009-03-01
影响因子:
3.5
作者:
Jung, Marianna E.;Wilson, Andrew M.;Simpkins, James W.
通讯作者:
Simpkins, James W.