Aldehyde dehydrogenase 2 in cardiac protection: a new therapeutic target?

Aldehyde dehydrogenase 2 in cardiac protection: a new therapeutic target?
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DOI:
10.1016/j.tcm.2009.09.003
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发表时间:
2009-07
影响因子:
9.3
通讯作者:
Mochly-Rosen, Dana
Mochly-Rosen, Dana
中科院分区:
医学2区
文献类型:
--
作者:
Budas, Grant R.;Disatnik, Marie-Helene;Mochly-Rosen, Dana

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线粒体醛脱氢酶2(ALDH 2)是一种参与心脏细胞保护的关键酶。ALDH 2介导活性醛如乙醛和4-羟基-2-壬烯醛(4-HNE)的解毒以及硝酸甘油(GTN)对一氧化氮(NO)的生物活化。此外,慢性硝酸盐处理导致ALDH 2抑制并有助于硝酸盐耐受性。我们的实验室最近确定ALDH 2是内源性细胞保护的关键介质。我们报道了ALDH 2被磷酸化并被存活激酶蛋白激酶C ε(PKCε)激活,并发现ALDH 2活性与梗死面积之间存在强负相关。我们还鉴定了一种小分子ALDH 2激活剂(Alda-1),其在体内减少由缺血/再灌注诱导的心肌梗死面积。在这篇综述中,我们讨论的证据表明,ALDH 2是一个关键的调解人的内源性生存信号在心脏,建议可能的心脏保护机制ALDH 2介导的,并讨论这些发现的潜在临床意义。
Mitochondrial aldehyde dehydrogenase 2 (ALDH2) is emerging as a key enzyme involved in cytoprotection in the heart. ALDH2 mediates both the detoxification of reactive aldehydes such as acetaldehyde and 4-hydroxy-2-nonenal (4-HNE) and the bioactivation of nitroglycerin (GTN) to nitric oxide (NO). In addition, chronic nitrate treatment results in ALDH2 inhibition and contributes to nitrate tolerance. Our lab recently identified ALDH2 to be a key mediator of endogenous cytoprotection. We reported that ALDH2 is phosphorylated and activated by the survival kinase protein kinase C epsilon (PKCε) and found a strong inverse correlation between ALDH2 activity and infarct size. We also identified a small molecule ALDH2 activator (Alda-1) which reduces myocardial infarct size induced by ischemia/reperfusion in vivo. In this review, we discuss evidence that ALDH2 is a key mediator of endogenous survival signaling in the heart, suggest possible cardioprotective mechanisms mediated by ALDH2, and discuss potential clinical implications of these findings.
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