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甲基苯丙胺对大鼠心肌损伤作用的毒性影响机制初探 被引量:4

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摘要 目的研究慢性甲基苯丙胺(METH)中毒大鼠心肌细胞组织病理学的变化及慢性METH给药对心肌细胞L型钙通道(LTCCs)的毒性损伤作用。方法建立METH慢性大鼠中毒模型,对大鼠心脏系数的改变进行统计分析;对心肌组织进行HE、PTAH和HBFP染色,光学显微镜下观察心肌组织形态学改变;对心肌进行LTCCsα1c、β2亚基免疫组化染色,计算机图像分析系统半定量分析染色光密度,比较各组大鼠心肌免疫组化染色差异。结果慢性METH中毒模型大鼠心脏系数增高,与对照组比较差异有统计学意义(t=7.721,P<0.01);慢性METH毒性损伤表现为大鼠心肌细胞程度不一的嗜酸性增强、收缩带坏死、肌溶灶形成、波浪样改变,心肌间质出血及少量炎性细胞浸润;慢性METH中毒模型大鼠的心肌LTCCsα1c、β2亚基阳性染色,与对照组比较,差异有统计学意义(P均<0.01)。结论慢性METH中毒模型大鼠心脏肥大、心肌缺血缺氧性形态学改变,心肌LTCCsα1c亚基和β2亚基在心肌细胞的表达水平高。
出处 《毒理学杂志》 CAS CSCD 北大核心 2014年第4期291-294,共4页 Journal of Toxicology
基金 国家自然科学基金(81102301)
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