苯并[a]芘(BaP)诱导腹主动脉瘤发病及阿米福汀的作用研究

来源 :2016年浙江省医学会心电生理与起搏学术年会 | 被引量 : 0次 | 上传用户:mike595959
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  目的:研究阿米福汀对苯并[a]芘(BaP)诱导C57BL/6j小鼠腹主动脉瘤(AAA)形成的保护作用,探讨相关机制.方法:48只8月龄雄性C57BL/6j小鼠随机分为四组:对照组:以5ml/kg的量每周向小鼠腹腔内注射中链甘油三酯.模型组(AngⅡ+BaP):ALZET渗透泵在肩胛骨中部皮下植入每天释放AngⅡ0.9mg/kg),同时每周以10mg/kg的量于小鼠腹腔注射BaP.低剂量阿米福汀组:AngⅡ和BaP的给药方式和剂量处理同模型组,同时于每周BaP注射前半小时给予阿米福汀50mg/kg/w腹腔注射.高剂量阿米福汀组:AngⅡ和BaP的给药方式和剂量处理同模型组,同时于每周BaP注射前半小时给予阿米福汀100mg/kg/w腹腔注射.于第7周行小鼠解剖,腹主动脉分离取出以察看标本形态;行石蜡切片行HE染色观察血管壁结构,行masson染色观察胶原纤维变化情况;图像分析仪检测各组小鼠腹主动脉的平均血管周长.采用免疫组织化学法检测各组腹主动脉组织中的巨噬细胞侵润情况及MMP-9、MMP-12、TNF-α、NF-κB的表达结果.
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