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作 者:叶佳颖[1] 钟久昌[1,2] 金海燕[3] 于茜[1] 余细勇[3] 郭俊明[1] 林秋雄[3] 肖丙秀[1] 梁家亮[3]
机构地区:[1]宁波大学医学院分子高血压病研究室生物化学与分子生物学研究所,浙江宁波市315211 [2]上海交通大学医学院附属瑞金医院高血压研究所 [3]广东省人民医院医学研究中心精神卫生研究所
出 处:《心血管康复医学杂志》2010年第2期166-169,共4页Chinese Journal of Cardiovascular Rehabilitation Medicine
基 金:国家自然科学基金(30700328&30973522);浙江省科技计划面上科研项目(2009C33080);宁波市自然科学基金(2008A610077)
摘 要:目的:探讨替米沙坦对自发性高血压大鼠(SHR)血管前纤维蛋白1(Profilin-1)及细胞外信号调节激酶(ERK1/2)磷酸化水平的影响。方法:选取10周龄SHR及其同源对照魏-凯氏(WKY)大鼠,给予替米沙坦(5~10 mg/kg.d)或安慰剂,为期10周。尾套法测量大鼠尾血压。采用实时定量聚合酶链式反应(PCR)和West-ern免疫印迹检测治疗后大鼠主动脉组织中Profilin-1 mRNA和蛋白及ERK1/2磷酸化水平。结果:与WKY对照组相比,SHR大鼠血压明显升高[(126±3.5)mmHg∶(195±6.1)mmHg],伴血管Profilin-1 mRNA[(1.0±0.11)∶(7.8±0.57)]及ERK硫酸化水平[(1.0±0.11):(2.43±0.19)]表达明显升高(P均<0.01),而经替米沙坦治疗后SHR大鼠血压明显降低[替米沙坦低剂量组(169±6.2)mmHg,高剂量组(161±4.9)mmHg],伴Profilin-1 mRNA[替米沙坦低剂量组(4.45±0.92),高剂量组(1.95±0.41)]表达及ERK1/2磷酸化水平[替米沙坦低剂量组(1.62±0.20),高剂量组(1.34±0.09)]明显下调(P均<0.05)。结论:长期替米沙坦治疗可降低高血压大鼠血压水平,降低血管Profilin-1表达及ERK1/2磷酸化水平,提示替米沙坦对高血压血管重塑具有一定的保护功效。Objective: To investigate the effects of telmisartan on vascular expression of Profilin-1 and extraeellular regulated kinase (ERK1/2) in spontaneous hypertension rats (SHR). Methods.. The 10 weeks SHR and Wistar- Kyoto (WKY) rats were treated with telmisartan (5 or 10 mg/kg ·d) or placebo for 10 weeks. Systolic blood pressure (SBP) of rat was measured by tail-cuff method. The mRNA, protein and phosphorylation levels of Profilin-1 and ERK1/2 in treated rats were determined with real-time polymerase chain reaction, Western blotting methods respectively. Results.. Compared with WKY rat, the SBP significantly elevated [ (126± 3.5) mmHg; (195±6.1) mmHg], accompanied by enhanced Profilin-1 mRNA [ (1.0±0.11) : (7.8±0. 57)] and phosphorylated ERK1/2 [ (1.0±0.11) ; (2.43±0.19)] levels in SHR (P〈0. 01 all). Treatment with Telmisartan significantly reduced the SBP [Telmisartan low dose group (169±6.2) mmHg, high dose group (161±4. 9) mmHg], along with reductions in Profilin-1 mRNA expression [-Telmisartan low dose group (4.45±0. 92), high dose group (1.95±0.41)] and ERK1/2 phosphorylation levels [Telmisartan low dose group (1.62±0.20), high dose group (1.34±0. 09)], P〈 0.05 all. Conclusion: Chronic Telmisartan treatment reduces systolic blood pressure and down-regulates vascular expression of Profilin-1 and ERK phosphorylation levels in SHR, suggesting that Telmisartan have potential vascular protective effects in hypertension.
关 键 词:替米沙坦 高血压 纤维蛋白 细胞外信号调节激酶类
分 类 号:R544.1[医药卫生—心血管疾病]
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