血管紧张素转化酶抑制剂和AT1受体拮抗剂联合应用对肺动脉高压大鼠肺血管重构的影响  被引量:3

Combination therapy of angiotensin-converting enzyme inhibitor and angiotensin Ⅱ type Ⅰ receptor antagonists to intervene pulmonary vascular remodeling in rats with pulmonary arterial hypertension

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作  者:王献民 张奎[2] 乔莉娜[3] 李焰 柳颐龄 石坤 刘斌[4] 魏丽[3] 周同甫[3] 

机构地区:[1]成都市妇女儿童中心医院儿童心脏科,610091 [2]遵义医学院法医系 [3]四川大学华西第二医院儿童心脏科 [4]泸州医学院儿科

出  处:《中华实用儿科临床杂志》2013年第1期52-55,共4页Chinese Journal of Applied Clinical Pediatrics

基  金:四川省卫生厅科研基金(080064)

摘  要:目的探讨血管紧张素转化酶抑制剂(ACEI)及AT1受体拮抗剂联合应用对肺动脉高压(PAH)大鼠肺血管重构是否有叠加效应。方法50只雄性SD大鼠(350~400g),随机分为5组,每组10只:正常对照组、模型组、卡托普利干预组、氯沙坦干预组及卡托普利+氯沙坦联合干预组。5周后观察各组平均肺动脉压(mPAP)、心室质量即右心室/(左心室+室问隔)[RV/(LV+S)]、肺小动脉中膜厚度(WT)和新生内膜形成以及无肌型小动脉肌化程度的变化;免疫组织化学法检测SM—α—actin在肺动脉平滑肌细胞中的表达;应用实时荧光定量PCR(FQ—PCR)检测韧黏素-C(TN—C)mRNA在肺组织中的表达。结果模型组有新生内膜形成,该组mPAP(39.42±3.15)mmHg(1mmHg=0.133kPa)、心室质量(64.26±3.85)%、肺小动脉WT百分比(61.59±5.23)%、肺小动脉肌化程度(75.21±6.77)%、肺小动脉新生内膜增殖度(80.80±6.54)%及TN—C mRNA(△△Ct)(1.10±0.56)表达均高于正常对照组[(17.61±1.68)mmHg、(26.35±3.04)%、(11.22±2.10)%、(16.57±2.31)%、0、4.60±0.70],差异均有统计学意义(P均〈0.05);同时模型组上述各项指标较其他干预组亦升高,差异均有统计学意义(P均〈0.05);卡托普利+氯沙坦联合干预组与卡托普利、氯沙坦单独干预组进行上述各指标比较,差异均无统计学意义(P均〉0.05)。结论卡托普利及氯沙坦可干预PAH肺血管重构,从而缓解PAH和肺血管重构的形成;二者联合应用未证实产生叠加或协同效应。Objective To explore the effect summation or synergistic effect of combination use of angiotensinconverting enzyme inhibitor(ACEI) and angiotensin Ⅱ type Ⅰ ( AT1 ) receptor blocker to intervene pulmonary vascular remodeling in rats with pulmonary arterial hypertension (PAH). Methods Fifty male Sprague Dawley rats (350 -400 g) were randomly divided into 5 groups which included the PAH model group( n = 10) ,captopril treatment group( n = 10) ,losartan treatment group( n = 10), captopril plus losartan treatment group(n = 10) and normal control group( n = 10). Mean pulmonary arterial pressure(mPAP) ,weight ratio of ventricle mass[ RV/( LV + S) ] ,the relative wall thickness(WT) of the small pulmonary artery,neointima formation as well as the degree of muscularization of non-muscular arterioles were measured at the 5th week. Meanwhile, the expression of SM-α-actin in pulmonary artery smooth muscle cell was determined by immunochemistry stain. Tenascin-C (TN-C) mRNA were assayed in pulmonary tissue by realtime fluorogenic quantitative PCR. Results Pneumonectomy plus MCT injection induced severe pulmonary arterial hypertension characterized by neointima formation. Mean pulmonary arterial pressure(mPAP) [ (39.42 ±3.15) mm Hg] ( 1 mm Hg = 0. 133 kPa ), ventricle mass [ ( 64.26 ±3.85 ) % ], WT of the small pulmonary arteries [ ( 61.59 ±5.23 ) % ] , the muscula-rization of peripheral pulmonary arterioles [ ( 75.21 ± 6.77 ) % ] , degree of neointima proliferation of the small pulmonary arteries [ (80.80 ±6.54) % ] and expression of TN-C mRNA ( A A Ct) ( 1.10 ±0.56) in the lung tissue in the model group were higher significantly than those in normal group[ (17.61 ±1.68 ) mm Hg, ( 26.35 ±3.04 ) %, ( 11.22 ±2. 10) %, ( 16.57 ±2.31 ) % ,0,4.60 ±0.70 ( all P 〈 0. 05 ) ]. Meanwhile, they were also higher significantly than those in other groups ( all P 〈 0.05 ), which were apparently suppressed by c

关 键 词:肺动脉高压 血管重构 韧黏素-C 血管紧张素转化酶抑制剂 AT1受体拮抗剂 

分 类 号:R544.1[医药卫生—心血管疾病]

 

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