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miR-130b通过调控p53抑制局灶性脑缺血大鼠神经细胞凋亡 被引量:2

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摘要 目的探讨miR-130b通过调控p53抑制局灶性脑缺血大鼠神经细胞凋亡。方法建立局灶性脑缺血大鼠模型,分为局灶性脑缺血组、miR-130b模拟物(mimics)组、miR-130b抑制剂组,测定脑梗死灶内缘距上矢状线距离、脑梗死体积、TUNEL阳性细胞数、神经细胞凋亡率、神经细胞凋G1期、miR-130b、p53 mRNA表达水平、含半胱氨酸的天冬氨酸蛋白水解酶(caspase)3、caspase6、caspase9蛋白表达水平。结果miR-130b mimics组脑梗死灶内缘距上矢状线距离、G1期、miR-130b mRNA表达水平显著高于局灶性脑缺血组(P<0.05),脑梗死体积、TUNEL阳性细胞数、神经细胞凋亡率、p53 mRNA、caspase3、caspase6、caspase9蛋白表达水平显著低于局灶性脑缺血组(P<0.05);miR-130b抑制剂组脑梗死灶内缘距上矢状线距离、G1期、miR-130b mRNA表达水平显著低于局灶性脑缺血组及miR-130b mimics组(P<0.05),脑梗死体积、TUNEL阳性细胞数、神经细胞凋亡率、p53 mRNA表达水平、caspase3、caspase6、caspase9蛋白表达水平显著高于局灶性脑缺血组及miR-130b mimics组(P<0.05)。miRNA-130b与p53、caspase3、caspase6、caspase9呈显著负相关(P<0.05)。结论miR-130b能明显降低大鼠局灶性脑缺血损伤程度,降低神经细胞凋亡程度;其机制与miR-130b能抑制P53的表达进而抑制局灶性脑缺血大鼠神经细胞凋亡,抑制caspase3、caspase6、caspase9的表达有关。
出处 《中国老年学杂志》 CAS 北大核心 2020年第3期602-605,共4页 Chinese Journal of Gerontology
基金 海南省卫生计生行业科研项目(16A200073)
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