非对称二甲基精氨酸促进大鼠主动脉氧化型低密度脂蛋白受体表达  被引量:4

Asymmetric Dimethylarginine Accelerates the Expression of Oxidized Low Density Lipoprotein Receptor of Aorta in Rats

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作  者:何军[1] 刘海潮[1] 马业新[1] 

机构地区:[1]华中科技大学同济医学院附属同济医院心血管内科,湖北省武汉市430030

出  处:《中国动脉硬化杂志》2006年第12期1031-1034,共4页Chinese Journal of Arteriosclerosis

摘  要:目的观察非对称二甲基精氨酸对大鼠主动脉氧化型低密度脂蛋白受体表达的影响,探讨其在动脉粥样硬化中的作用。方法健康成年Wistar大鼠34只随机分为四组:①对照组(n=7)正常饲料喂养,正常饮水。②高脂饲料组(n=9)用高脂饲料喂养,正常饮水。③非对称二甲基精氨酸(简称甲基精氨酸)组(n=9)用高脂饲料喂养,饮水中按体重加入非对称二甲基精氨酸[0.2 mg/(kg.d)]。④L精氨酸组(n=9)用高脂饲料喂养,饮水中按体重加入非对称二甲基精氨酸[0.2 mg/(kg.d)]和L精氨酸[12 mg/(kg.d)]。18周后麻醉大鼠,取主动脉,以RT-PCR和Western blotting检测主动脉氧化型低密度脂蛋白受体mRNA和蛋白表达。结果①甲基精氨酸组氧化型低密度脂蛋白受体mRNA表达量(1.608±0.114)较对照组(0.363±0.027)和高脂饲料组(0.480±0.065)增加(P均<0.001),L精氨酸组氧化型低密度脂蛋白受体mRNA表达量(0.902±0.037)较甲基精氨酸组降低(P<0.01);②甲基精氨酸组氧化型低密度脂蛋白受体蛋白表达量(0.662±0.063)较对照组(0.111±0.022)和高脂饲料组(0.251±0.004)增加(P均<0.001),L精氨酸组(0.364±0.117)较甲基精氨酸组氧化型低密度脂蛋白受体蛋白表达降低(P<0.05)。结论非对称二甲基精氨酸促进大鼠主动脉氧化型低密度脂蛋白受体基因和蛋白表达,可能与非对称二甲基精氨酸促进动脉粥样硬化有关。Aim To observe the effect of asymmetric dimethylarginine (ADMA) on oxidized low-density lipoprotein receptor (LOX-1) expression,and to investigate the significance of ADMA in atherogenesis. Methods 34 Wistar rats were divided into fottr groups randomly: ①Control group (n=7): Fedby normaldiet and water. ②High fat diet group (n=9):Fed by high fat diet and normal water. ③ADMA group ( n =9): Fed by high fat diet, water with ADMA [0.2 mg/(kg·d)].④ L-Arg group( n = 9): Fed by high fat diet, water with ADMA [0.2 mg/(kg·d)] and L-Ats [12 mg/(kg·d)]. 18 weeks later, the rats were anesthetized, and aortas were gathered. The expression of LOX-1 mRNA and protein were detected by RT-PCR and Western blotting. Results ①The expression of LOX-1 mRNA in ADMA group ( 1. 608 ± 0. 114) was higher than that of control group (0.363 ± 0.027) and high fat diet group (0.480 ± 0.065} ( P 〈 0.001, either) ; In L-Arg group (0.902 ± 0. 037), LOX-1 mRNA expression decreased compared with ADMA group (P 〈 0.01); ② The expression of LOX-1 protein increased in ADMA group (0.662 ± 0.063 )compared with control group (0.111 ± 0. 022)and high fat diet group (0. 251± 0. 004) ( P 〈 0. 001, either), Compared with ADMA group, the expression of LOX-1 protein decreased in L-Arg group (0. 364 ± 0.117) ( P 〈 0.05 ). Conclusion ADMA accelerates the expression of LOX- 1 in rats' aortas, tiffs might be related to atherogenesis.

关 键 词:病理学与病理生理学 非对称二甲基精氨酸 一氧化氮合酶 受体 氧化型低密度脂蛋白 氧化型低密度脂蛋白受体 实验动物 大鼠 动脉粥样硬化 

分 类 号:R363[医药卫生—病理学]

 

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