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