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丙烯酰胺对小鼠心肌超微结构及线粒体酶的影响

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摘要 目的观察丙烯酰胺染毒后小鼠心肌超微结构及心肌线粒体酶的改变,探讨丙烯酰胺的心肌毒性。方法健康清洁级昆明种雄性小鼠48只,随机分为1个正常对照组和5、30和60 mg/(kg.d)3个丙烯酰胺剂量实验组,腹腔注射染毒。10 d处死小鼠,透射电镜观察心肌超微结构变化;心电图机检测小鼠心脏电位变化;比色法检测小鼠心肌线粒体Na+-K+-ATPase、Ca2+-ATPase;ELISA法检测细胞色素氧化酶(CCO)。结果与对照组相比,各剂量实验组小鼠心室肌细胞线粒体嵴减少或消失,线粒体部分膜融合;糖原减少,肌节出现紊乱,随着染毒剂量的增加,损伤程度加剧,呈现出剂量-效应趋势。中和高剂量组和对照组相比Na+-K+-ATP酶活力明显下降(P<0.05);各实验组和对照组相比Ca2+-ATPase、CCO均下降并存在剂量依赖关系(P<0.05)。结论丙烯酰胺摄入后,可造成小鼠心肌超微结构及线粒体相关酶表达改变,提示丙烯酰胺具有心肌毒性。
出处 《毒理学杂志》 CAS CSCD 北大核心 2011年第3期214-216,共3页 Journal of Toxicology
基金 河南省教育厅自然科学基金项目(2010B310006)
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