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不同远程缺血预处理方法对大鼠脑梗死体积和神经功能损伤的影响。

Effects of different remote ischemia perconditioning methods on cerebral infarct volume and neurological impairment in rats.

机构信息

Department of Systems Biology in Thromboregulation, Kagoshima University Graduate School of Medical and Dental Science, 8-35-1 Sakuragaoka, Kagoshima, 890-8520, Japan.

Department of Physical Therapy, School of Health Sciences, Faculty of Medicine, Kagoshima University, 8-35-1 Sakuragaoka, Kagoshima, 890-8544, Japan.

出版信息

Sci Rep. 2023 Feb 7;13(1):2158. doi: 10.1038/s41598-023-29475-2.

Abstract

Remote ischemic perconditioning (RIPerC) is a novel neuroprotective method against cerebral infarction that has shown efficacy in animal studies but has not been consistently neuroprotective in clinical trials. We focused on the temporal regulation of ischemia-reperfusion by RIPerC to establish an optimal method for RIPerC. Rats were assigned to four groups: 10 min ischemia, 5 min reperfusion; 10 min ischemia, 10 min reperfusion; 5 min ischemia, 10 min reperfusion; and no RIPerC. RIPerC interventions were performed during ischemic stroke, which was induced by a 60-min left middle cerebral artery occlusion. Infarct volume, sensorimotor function, neurological deficits, and cellular expressions of brain-derived neurotrophic factor (BDNF), B-cell lymphoma 2 (Bcl-2), Bcl-2-associated X protein (Bax), and caspase 3 were evaluated 48 h after the induction of ischemia. Terminal deoxynucleotidyl transferase-mediated dUTP-biotin nick-end labeling (TUNEL) was also performed. RIPerC of 10 min ischemia/10 min reperfusion, and 5 min ischemia/10 min reperfusion decreased infarct volume, improved sensorimotor function, decreased Bax, caspase 3, and TUNEL-positive cells, and increased BDNF and Bcl-2 expressions. Our findings suggest RIPerC with a reperfusion time of approximately 10 min exerts its neuroprotective effects via an anti-apoptotic mechanism. This study provides important preliminary data to establish more effective RIPerC interventions.

摘要

远程缺血预处理(RIPerC)是一种针对脑梗死的新型神经保护方法,在动物研究中显示出疗效,但在临床试验中并未始终具有神经保护作用。我们专注于 RIPerC 对缺血再灌注的时间调节,以建立 RIPerC 的最佳方法。大鼠被分为四组:10 分钟缺血,5 分钟再灌注;10 分钟缺血,10 分钟再灌注;5 分钟缺血,10 分钟再灌注;和没有 RIPerC。RIPerC 干预在缺血性中风期间进行,通过 60 分钟左大脑中动脉闭塞诱导。在缺血诱导后 48 小时评估梗死体积、感觉运动功能、神经缺陷以及脑源性神经营养因子(BDNF)、B 细胞淋巴瘤 2(Bcl-2)、Bcl-2 相关 X 蛋白(Bax)和半胱天冬酶 3的细胞表达。还进行了末端脱氧核苷酸转移酶介导的 dUTP-生物素缺口末端标记(TUNEL)。10 分钟缺血/10 分钟再灌注和 5 分钟缺血/10 分钟再灌注的 RIPerC 减少了梗死体积,改善了感觉运动功能,减少了 Bax、半胱天冬酶 3 和 TUNEL 阳性细胞,增加了 BDNF 和 Bcl-2 的表达。我们的研究结果表明,再灌注时间约为 10 分钟的 RIPerC 通过抗细胞凋亡机制发挥其神经保护作用。这项研究提供了重要的初步数据,以建立更有效的 RIPerC 干预措施。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bc7c/9905538/01148e8c419e/41598_2023_29475_Fig1_HTML.jpg

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