不同降压药物干预对自发性高血压大鼠主动脉瞬时受体电位通道C亚族表达的影响

目的:研究雷米普利、缬沙坦和氨氯地平对自发性高血压大鼠(SHR)主动脉(内膜及平滑肌)的瞬时受体电位通道C亚族3亚型及6亚型(TRPC3、TRPC6)表达的影响.方法:24只SHR随机分成4个组(η=6),1个SHR对照组,雷米普利组、缬沙坦组和氨氯地平组,采用灌胃法给药4周,另用6只Wistar鼠(WKY)作正常WKY组,观察给药治疗4周前后血压变化,实验结束时取主动脉组织进行TRPC3和TRPC6的检测,采用逆转录多聚酶链反应(RT-PCR)法检测信使核糖核酸(mRNA)的表达,免疫组织化学法及蛋白免疫印迹(Western Blot)法检测蛋白的表达.结果:SHR对照组与正常WKY组治疗前比较,血压明显增高(P<0.05),SHR对照组与正常WKY组治疗后比TR-PC3、TRPC6的mRNA和蛋白表达显著增加(P均<0.05),差异均有统计学意义.药物治疗4周后,雷米普利组、缬沙坦组、氨氯地平组与治疗前比血压均有效地降低(P均<0.05),TRPC3的mRNA和蛋白表达均减少(P均<0:05),差异均有统计学意义.TRPC6的mRNA和蛋白表达改变不明显,雷米普利组、缬沙坦组、氨氯地平组间TRPC3、TRPC6的mRNA和蛋白表达差异无统计学意义.结论:SHR大鼠主动脉TRPC3及TRPC6的mRNA和蛋白表达明显增高,给予雷米普利、缬沙坦和氨氯地平4周后血压下降,同时TRPC3mRNA和蛋白表达降低,提示TRPC3可能参与了SHR大鼠血压调控.

Effect of Anti-Hypertensive Medication on Expression of TRPC3 and TRPC6 in the Aorta of Spontaneous Hypertensive Rats

Objective:To investigate the effect of Ramipril,Valsartan and Anlodipine on expression of transient receptor potential canonical 3(TRPC3)channel and TRPC6 channel in the aorta of spontaneous hypertensive rats(SHR).Methods:A total of 24 SHR were randomly divided into 4 groups:Ramipril group,Valsartan group,Amlodipine group,and Experimental control(EC)group,the rats had normal saline.Additionally,we set up a Blank control(BC)group with normal rats.n=6 in each group.All animals were treated for 4 weeks.The exp...