Electroacupuncture preconditioning at acupoint Baihui （GV20） can reduce focal cerebral ischemia/reperfusion injury. However, the precise protective mechanism remains unknown. Mitochondrial fission mediated by dynami...Electroacupuncture preconditioning at acupoint Baihui （GV20） can reduce focal cerebral ischemia/reperfusion injury. However, the precise protective mechanism remains unknown. Mitochondrial fission mediated by dynamin-related protein 1 （Drp1） can trigger neuronal apoptosis following cerebral ischemia/reperfusion injury. Herein, we examined the hypothesis that electroacupuncture pretreatment can regulate Drp1, and thus inhibit mitochondrial fission to provide cerebral protection. Rat models of focal cerebral ischemia/reperfusion injury were established by middle cerebral artery occlusion at 24 hours after 5 consecutive days of preconditioning with electroacupuncture at GV20 （depth 2 mm, intensity 1 mA, frequency 2/15 Hz, for 30 minutes, once a day）. Neurological function was assessed using the Longa neurological deficit score. Pathological changes in the ischemic penumbra on the injury side were assessed by hematoxylin-eosin staining. Cellular apoptosis in the ischemic penumbra on the injury side was assessed by terminal deoxyribonucleotidyl transferase-mediated dUTP-digoxigenin nick end labeling staining. Mitochondrial ultrastructure in the ischemic penumbra on the injury side was assessed by transmission electron microscopy. Drp1 and cytochrome c expression in the ischemic penumbra on the injury side were assessed by western blot assay. Results showed that electroacupuncture preconditioning decreased expression of total and mitochondrial Drp1, decreased expression of total and cytosolic cytochrome c, maintained mitochondrial morphology and reduced the proportion of apoptotic cells in the ischemic penumbra on the injury side, with associated improvements in neurological function. These data suggest that electroacupuncture preconditioning-induced neuronal protection involves inhibition of the expression and translocation of Drp1.展开更多
目的通过Meta分析探讨细胞焦亡相关因子在膜性肾病中的表达情况。方法全面检索英文数据库Web of Science、PubMed、Embase、Cochrane Library和中文数据库中国知网、维普中文科技期刊、万方数据知识服务平台、中国生物医学文献的相关文...目的通过Meta分析探讨细胞焦亡相关因子在膜性肾病中的表达情况。方法全面检索英文数据库Web of Science、PubMed、Embase、Cochrane Library和中文数据库中国知网、维普中文科技期刊、万方数据知识服务平台、中国生物医学文献的相关文献,采用Revman 5.4.1(ReviewManager)软件对入选文献质量进行评价,对数据进行提取和统计学分析。主要结局指标包括:含NOD样受体家族pyrin结构域蛋白3(NLRP3)、凋亡相关斑点样蛋白(ASC)、半胱氨酸天冬氨酸特异性蛋白酶-1(caspase-1)、基因gasdermin D(GSDMD)、白介素1β(IL-1β)、白介素18(IL-18)。结果最终纳入了7篇文献,Meta分析结果显示,与空白组相比,模型组小鼠肾组织NLRP3、caspase-1、ASC、GSDMD、IL-1β、IL-18表达,以及血清IL-18及IL-1β均明显升高。结论细胞焦亡相关因子的明显升高充分证明了膜性肾病中发生了细胞焦亡,为膜性肾病的治疗提供了新靶点。展开更多
基金supported by the Natural Science Foundation of Shandong Province of China,No.ZR2015HM023a grant from the Science and Technology Plan Project of Shinan District of Qingdao City of China,No.2016-3-029-YY
文摘Electroacupuncture preconditioning at acupoint Baihui （GV20） can reduce focal cerebral ischemia/reperfusion injury. However, the precise protective mechanism remains unknown. Mitochondrial fission mediated by dynamin-related protein 1 （Drp1） can trigger neuronal apoptosis following cerebral ischemia/reperfusion injury. Herein, we examined the hypothesis that electroacupuncture pretreatment can regulate Drp1, and thus inhibit mitochondrial fission to provide cerebral protection. Rat models of focal cerebral ischemia/reperfusion injury were established by middle cerebral artery occlusion at 24 hours after 5 consecutive days of preconditioning with electroacupuncture at GV20 （depth 2 mm, intensity 1 mA, frequency 2/15 Hz, for 30 minutes, once a day）. Neurological function was assessed using the Longa neurological deficit score. Pathological changes in the ischemic penumbra on the injury side were assessed by hematoxylin-eosin staining. Cellular apoptosis in the ischemic penumbra on the injury side was assessed by terminal deoxyribonucleotidyl transferase-mediated dUTP-digoxigenin nick end labeling staining. Mitochondrial ultrastructure in the ischemic penumbra on the injury side was assessed by transmission electron microscopy. Drp1 and cytochrome c expression in the ischemic penumbra on the injury side were assessed by western blot assay. Results showed that electroacupuncture preconditioning decreased expression of total and mitochondrial Drp1, decreased expression of total and cytosolic cytochrome c, maintained mitochondrial morphology and reduced the proportion of apoptotic cells in the ischemic penumbra on the injury side, with associated improvements in neurological function. These data suggest that electroacupuncture preconditioning-induced neuronal protection involves inhibition of the expression and translocation of Drp1.
