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αB-晶体蛋白对乳鼠心肌细胞在缺氧/复氧条件下的表达及保护作用的实验研究

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摘要 目的研究在缺氧/复氧条件下随着缺氧时间延长αB-晶体蛋白对原代培养心肌细胞中caspase-3的影响。方法以阳离子脂质体(LipofectamineTM2000)介导,将原代培养SD大鼠乳鼠心肌细胞分为转染组(转染pEGFP-αB-crystallin-C3)、空载组(转染pEGFP-C3)和空白组(无任何质粒转染),转染后分别缺氧培养6、12、18h后复氧12h,Western Blot半定量检测αB-晶体蛋白和caspase-3活化产物p17表达。结果转染组心肌细胞αB-晶体蛋白表达有下降趋势,但差异无显著性(P>0.05);转染组p17与空白组和空载组比较,明显降低(P<0.05),在缺氧6~18h内,随着缺氧时间延长,表达相对稳定,有下降趋势但差异无显著性(P>0.05);在缺氧12h后,各组p17表达量趋于平稳。结论在缺氧/复氧条件下,αB-晶体蛋白可能具有抑制caspase-3活化,抗细胞凋亡作用;在缺氧6~18h内,随着缺氧时间延长,αB-晶体蛋白抑制caspase-3活化的作用虽有下降趋势,但基本相对稳定。
作者 李立宇 王林
出处 《中国城乡企业卫生》 2010年第3期92-94,共3页 Chinese Journal of Urban and Rural Enterprise Hygiene
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