Ethanol withdrawal hastens the aging of cytochrome c oxidase.

Ethanol withdrawal hastens the aging of cytochrome c oxidase.
复制标题

DOI:
10.1016/j.neurobiolaging.2011.02.002
复制
发表时间:
2012-03
影响因子:
4.2
通讯作者:
Simpkins JW
Simpkins JW
中科院分区:
医学2区
文献类型:
--
作者:
Jung ME;Ju X;Metzger DB;Simpkins JW

文献摘要

参考文献

被引文献

相似文献

我们研究了突然乙醇戒断(EW)是否年龄特异性抑制一种关键的线粒体酶,细胞色素c氧化酶(考克斯),以及雌激素是否缓解了这个问题。我们还测试了EW的这种可能的作用是否涉及与促凋亡BAX和线粒体膜肿胀相关的底物(细胞色素c)缺乏。切除卵巢的年轻、中年和老年大鼠,有或没有17β-雌二醇(E2)植入,重复EW。采用分光光度法测定考克斯酶活性和线粒体膜肿胀度,免疫印迹法测定线粒体细胞色素c和BAX水平。考克斯活性的损失和线粒体膜肿胀只发生在老年大鼠在控制饮食条件下,但发生更早,在年轻大鼠在EW条件下开始。E2处理减轻了这些EW效应。EW增加线粒体BAX,特别是在中年大鼠,但没有改变细胞色素c。总体而言,EW加速但E2延迟与年龄相关的考克斯活性丧失。这种EW效应不依赖于细胞色素c,但可能涉及BAX和膜脆弱性的线粒体过载。
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.
DOI: 10.1016/j.neurobiolaging.2010.01.005
发表时间: 2011-12
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
DOI: 10.1016/s0014-5793(97)01087-9
发表时间: 1997-09-22
期刊: FEBS LETTERS
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.