他米巴罗汀减轻大鼠脑缺血再灌注损伤

摘要

目的 探讨他米巴罗汀(Am80)对大鼠脑缺血再灌注损伤(CIR)的作用.方法 将大鼠随机分为:假手术组(sham)、模型组(I/R)和他米巴罗汀干预组(Am80,灌胃给予Am806 mg/kg).采用线栓法建立大脑中动脉栓塞(MCAO)模型.术后24 h断头取脑,在处死前采用双盲法进行神经行为学评分;TTC染色测定脑梗死体积;Western blot和RT-qPCR法分别检测RARα、Bcl-2和Bax蛋白及mRNA的表达.结果 Am80可显著改善MCAO大鼠神经功能缺损,有效地降低脑梗死体积(P<0.01),上调RARα和Bcl-2表达(P<0.01),降低Bax的表达(P<0.01).结论 他米巴罗汀对脑缺血再灌注损伤大鼠有保护作用,其作用可能与抗凋亡有关.%Objective To investigate the effect of tamibarotene(Am80)on cerebral ischemia reperfusion injury. Methods Rats were randomly divided into sham operation group(Sham),model group(I/R) and tamibarotene in-tervention group (Am80, intragastric administration of Am80 6 mg/kg). The middle cerebral artery occlusion (MCAO) was established by suture method. At 24 h after reperfusion,the brain was removed. And the neurological behavioral score was assessed by double blind method.The cerebral infarction volume was measured by TTC staining. The proteins of RARα,Bcl-2,Bax and mRNA were examined by Western blot and RT-qPCR,respectively. Results Am80 significantly improved the neurological deficits of MCAO rats and effectively reduced the infarct volume. And upregulated the level of RARα and Bcl-2, decreased the expression of Bax. Conclusions Am80 has a protective effect on cerebral ischemia-reperfusion in rats,and its effect may be related to anti-apoptosis.