高同型半胱氨酸血症对主动脉组织Bcl-2基因甲基化影响

被引:9
作者
丛广志 [1 ]
贾绍斌 [2 ]
陈大鹏 [2 ]
罗彩琴 [1 ]
机构
[1] 宁夏医科大学
[2] 宁夏医科大学总医院心脏中心
关键词
动脉粥样硬化; 同型半胱氨酸; Bcl-2; DNA甲基化;
D O I
10.13201/j.issn.1001-1439.2012.04.022
中图分类号
R543.5 [动脉疾病];
学科分类号
1002 ; 100201 ;
摘要
目的:探讨高蛋氨酸饮食诱导高同型半胱氨酸血症(Hhcy)对大鼠主动脉组织Bcl-2基因启动子区甲基化水平的影响。方法:健康6周龄雄性Wistar大鼠24只,体重(160±10)g,适应性喂养1周后随机分为对照组和Hhcy组,每组12只。对照组给予AIN-93G配方饲料,Hhcy组饲以含1.7%蛋氨酸的AIN-93G配方饲料。喂养18周后,全自动生化仪测定血浆同型半胱氨酸浓度。HE染色观察大鼠主动脉组织形态学变化,免疫组织化学检测大鼠主动脉组织Bcl-2表达;巢式降落式PCR联合甲基化特异性PCR检测Bcl-2基因启动子区甲基化水平,荧光RT-PCR检测主动脉组织Bcl-2基因mRNA表达。结果:18周蛋氨酸饮食可以诱导大鼠Hhcy;HE染色主动脉组织呈现动脉粥样硬化早期形态学变化,免疫组织化学显示Hhcy组主动脉组织Bcl-2表达增加;Hhcy组主动脉组织Bcl-2基因启动子区甲基化水平低于对照组(P<0.05),Bcl-2基因mRNA表达高于对照组(P<0.05)。结论:Hhcy通过降低Bcl-2甲基化水平,使Bcl-2表达增加,平滑肌细胞凋亡减弱,可能是其参与动脉粥样硬化形成的分子机制之一。
引用
收藏
页码:302 / 306
页数:5
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