基质金属蛋白酶-2在兔颈动脉内膜损伤后动脉粥样硬化斑块中的表达

目的观察基质金属蛋白酶-2 在兔颈动脉内膜损伤后动脉粥样硬化斑块中的表达.方法高脂喂养加气体干燥术建立兔颈动脉内膜损伤模型,将实验动物分为正常饲料组;高脂饲料组;高脂饲料加气体干燥术后1个月组,2个月组,3个月组.用免疫组织化学法检测各组的金属蛋白酶-2 表达情况.结果 MMP-2 在普通饲料组兔颈动脉组织中低水平表达;在高脂喂养组和高脂喂养加气体干燥术组兔颈动脉组织中表达水平升高,两组有非常显著的差异(P<0.01),且高脂加气体干燥组1个月组与2个月组,1个月组与3个月组有非常显著的差异(P<0.01),2个月组与3个月组有显著差异(P<0.05).高脂组1个月组与3个月组有显著差异(P<0.05).结论 MMP-2 随着兔颈动脉内膜损伤后时间的延长,动脉粥样硬化斑块的生长表达增多.

MMP-2 expression in atherosclerosis plague after injury of carotid intima

Objective To investigate the expression of MMP-2 in rabbit carotid artery injured by airing drying. Methods Fifty-four rabbits were assigned to normal diet (n=18), fat diet (n=36), 18 of fat diet rabbits underwent airing drying of carotid intima after one-week fat diet. Then fed on fat diet after operation. All animals were sacrificed respectively at 1, 2, 3 months after airing drying (n=6 at each time piont), and MMP-2 expression was evaluated by immunohistochemistry. Results MMP-2 expression was low in the carotid of normal diet group, high in the fat diet group including the rabbits underwent airing drying with significant difference between them (P<0.01). There was significant difference of MMP-2 expression at 1 month and 2 month (P<0.01), 1 month and 3 month (P<0.01), 1 month and 3 month (P<0.05) in fat diet rabbits underwent airing drying, at 1 month and 3 month in only fat diet rabbits (P<0.05). Conclusion The expression of MMP-2 is elevated with the time prolongation after injury and the growing of atherosclerosis plaque.