Poly(ADP-ribose) polymerase inhibition prevents reactive oxygen species induced inhibition of aldehyde dehydrogenase2 activity

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• 作者：Shu-jian Wei^a ; ^b ; ¹ ; Jun-hui Xing^a ; ^b ; ¹ ; Bai-lu Wang^c ; Li Xue^a ; ^b ; Jia-li Wang^a ; ^b ; Rui Li^a ; Wei-dong Qin^a ; Juan Wang^a ; Xu-ping Wang^a ; Ming-xiang Zhang^a ; ^{zmx58@sdu.edu.cn} ; Yu-guo Chen^a ; ^b ; ^{chen919085@126.com}
• 关键词：poly(ADP-ribose) polymerase ; ROS ; Aldehyde dehydrogenase 2 ; SIRT3
• 刊名：Biochimica et Biophysica Acta (BBA)/Molecular Cell Research
• 出版年：2013
• 出版时间：March, 2013
• 年：2013
• 卷：1833
• 期：3
• 页码：479-486
• 全文大小：1037 K

文摘

Lipid peroxidation plays a critical role in cardiovascular diseases. Aldehydes are the major end products of lipid peroxidation and can be metabolized into less reactive chemical species by aldehyde dehydrogenase 2 (ALDH2). However, ALDH2 dehydrogenase activity can be affected by many factors including reactive oxygen species. To elucidate how reactive oxygen species inhibit ALDH2 dehydrogenase activity, we stimulated human aortic endothelial cells (HAECs) with oxidized low-density lipoproteins (ox-LDL) and performed a myocardial ischemia-reperfusion model. Ox-LDL treatment and ischemia-reperfusion injury inhibited ALDH2 dehydrogenase activity. Poly(ADP-ribose) polymerase (PARP) was activated by ox-LDL stimulation and ischemia-reperfusion injury and PARP inhibition partly restored ALDH2 dehydrogenase activity in ox-LDL treated HAECs and ischemia-reperfusion rat hearts. SIRT3 was upregulated by ox-LDL stimulation and ischemia-reperfusion injury and downregulated by PARP inhibition. Using siRNA to knock down SIRT3, we demonstrated that SIRT3 mediated deacetylation decreased ALDH2 dehydrogenase activity and PARP inhibition partly restored ALDH2 dehydrogenase activity through preventing SIRT3 expression and subsequently preserving ALDH2 acetylation.