《Drug Evaluation Research》 2018-07Add to Favorite Get Latest UpdateEffects of Ginkgolide Injection on therapeutic time window of cerebral ischemiareperfusion injury and apoptosis signaling pathway in ratsLIU Ke;YAN Yunbiao;DING Jianhua;LAN Xinxin;HU Gan;Chengdu Baiyu Pharmaceutical Co.Ltd.;Nanjing Medical University; Objective To investigate the effects of Ginkgolide Injection(GI) on the therapeutic time window of cerebral ischemia-reperfusion and its apoptosis signaling pathway in rats. Methods A transcient middle cerebral artery occlusion(t MCAO) model was established using Longa's method. In the first section of the study, GI(2.5 mg/kg) was ip administrated respectively at 1, 3, 6, and 9 h post reperfusion, two times a day for three days continuously. The degree of cerebral ischemia injury in model rats was assessed according to the extent of neurologic status, infarction volume, and water content in brain. The second section of the study was started with the dose of GI(2.5 mg/kg) to the t MCAO rats at 1 h post reperfusion, two times a day for three days continuously. Then p53, Bax, Bcl-2, and Caspase 3 in penumbra were measured with Western blotting at 24 h and 72 h post reperfusion, respectively. Results Compared with model group, the neurological deficit, infarction volume as well as edema were significantly improved in the 1 and 3 h GI treated group(P 0.05 and 0.01), and the brain damage of rats in the 6 and 9 h GI treated group were not significantly improved. The p53, Bax, and Caspase 3 were significantly down-regulated and the expression of Bcl-2 was significantly increased by GI administration both at 24 h and 72 h after reperfusion(P 0.05). Conclusion The therapeutic window of GI for transient focal cerebral ischemic injury lasts for at least 3 h, and inhibition of the apoptosis activation was involed in GI protective mechanisms.
《Drug Evaluation Research》 2018-07<br>Add to Favorite Get Latest Update<br>Effects of Ginkgolide Injection on therapeutic time window of cerebral ischemiareperfusion injury and apoptosis signaling pathway in rats<br>LIU Ke;YAN Yunbiao;DING Jianhua;LAN Xinxin;HU Gan;Chengdu Baiyu Pharmaceutical Co.Ltd.;Nanjing Medical University; <br>Objective To investigate the effects of Ginkgolide Injection(GI) on the therapeutic time window of cerebral ischemia-reperfusion and its apoptosis signaling pathway in rats. Methods A transcient middle cerebral artery occlusion(t MCAO) model was established using Longa's method. In the first section of the study, GI(2.5 mg/kg) was ip administrated respectively at 1, 3, 6, and 9 h post reperfusion, two times a day for three days continuously. The degree of cerebral ischemia injury in model rats was assessed according to the extent of neurologic status, infarction volume, and water content in brain. The second section of the study was started with the dose of GI(2.5 mg/kg) to the t MCAO rats at 1 h post reperfusion, two times a day for three days continuously. Then p53, Bax, Bcl-2, and Caspase 3 in penumbra were measured with Western blotting at 24 h and 72 h post reperfusion, respectively. Results Compared with model group, the neurological deficit, infarction volume as well as edema were significantly improved in the 1 and 3 h GI treated group(P 0.05 and 0.01), and the brain damage of rats in the 6 and 9 h GI treated group were not significantly improved. The p53, Bax, and Caspase 3 were significantly down-regulated and the expression of Bcl-2 was significantly increased by GI administration both at 24 h and 72 h after reperfusion(P 0.05). Conclusion The therapeutic window of GI for transient focal cerebral ischemic injury lasts for at least 3 h, and inhibition of the apoptosis activation was involed in GI protective mechanisms.
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