标题：RETRACTED: A dietary polyphenol resveratrol acts to provide neuroprotection in recurrent stroke models by regulating AMPK and SIRT1 signaling, thereby reducing energy requirements during ischemia (Retracted article. See vol. 43, pg. 990, 2016)
作者：Wang, Li-Mei; Wang, Yong-Jiu; Cui, Min; Luo, Wen-Juan; Wang, Xiao-Ji; Barber, Philip A.; Chen, Zhe-Yu
作者机构：[Wang, Li-Mei; Cui, Min; Chen, Zhe-Yu] Shandong Univ, Sch Med, Shandong Prov Key Lab Mental Disorders, Dept Neurobiol, Jinan 250100, Shandong, Peoples 更多
通讯作者地址：[Wang, LM]Shandong Univ, Sch Med, Shandong Prov Key Lab Mental Disorders, Dept Neurobiol, Jinan 250100, Shandong, Peoples R China.
来源：EUROPEAN JOURNAL OF NEUROSCIENCE
关键词：intracellular ATP level; intracellular NAD; NADH ratio; recurrent stroke; model; RSV neuroprotection; SIRT1 and AMPK signaling
摘要：Polyphenol resveratrol (RSV) has been associated with Silent Information Regulator T1 (SIRT1) and AMP-activated protein kinase (AMPK) metabolic stress sensors and probably responds to the intracellular energy status. Our aim here was to investigate the neuroprotective effects of RSV and its association with SIRT1 and AMPK signaling in recurrent ischemia models. In this study, elderly male Wistar rats received a combination of two mild transient middle cerebral artery occlusions (tMCAOs) as an in vivo recurrent ischemic model. Primary cultured cortical neuronal cells subjected to combined oxygenglucose deprivation (OGD) were used as an in vitro recurrent ischemic model. RSV administration significantly reduced infarct volumes, improved behavioral deficits and protected neuronal cells from cell death in recurrent ischemic stroke models in vivo and in vitro. RSV treatments significantly increased the intracellular NAD+/NADH ratio, AMPK and SIRT1 activities, decreased energy assumption and restored cell energy ATP level. SIRT1 and AMPK inhibitors and specific small interfering RNA (siRNA) for SIRT1 and AMPK significantly abrogated the neuroprotection induced by RSV. AMPK-siRNA and inhibitor decreased SIRT1 activities; however, SIRT1-siRNA and inhibitor had no impact on phospho-AMPK (p-AMPK) levels. These results indicated that the neuroprotective effects of RSV increased the intracellular NAD+/NADH ratio as well as AMPK and SIRT1 activities, thereby reducing energy ATP requirements during ischemia. SIRT1 is a downstream target of p-AMPK signaling induced by RSV in the recurrent ischemic stroke model.