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作 者:王晓占[1] 赵庆彦[1] 于胜波[1] 王徐乐[1] 肖金平[1] 代子玄[1] 黄鹤[1] 唐艳红[1] 黄从新[1]
出 处:《中华医学杂志》2015年第11期860-864,共5页National Medical Journal of China
基 金:国家科技支撑计划(2011BAI11B12)
摘 要:目的 探讨肾去交感神经(RSD)对心力衰竭(心衰,HF)犬心室基质重构的影响.方法 19只犬按照随机数字表法随机分为3组:假手术组(n=7),心衰组(n=6)和RSD组(n=6).假手术组植入起搏器不起搏;心衰组植入起搏器后行右室快速起搏3周;RSD组先行双侧肾动脉消融再行右室快速起搏3周,实验前后监测血流动力学变化,采用Masson染色、ELISA和Western印迹等方法检测心室间质纤维化、脑钠肽(BNP)、血管紧张素Ⅱ(AngⅡ)、醛固酮和转化生长因子-β(TGF-β)的变化.结果 心衰组和RSD组犬的左右心室舒张末期内径均明显增大[左室:(27.0±2.4)mm 比(37.0±2.8) mm,P<0.01和(30.0±2.5) mm比(36.0±2.8) mm,P<0.05;右室:(11.0±1.5)mm比(14.0±1.7) mm,P=0.03和(12.0±1.1) mm比(14.0±1.2) mm,P<0.05].与RSD组相比,心衰组犬左室舒张末期压力升高[(25.0±3.7) mmHg比(3.3±1.6) mmHg,P<0.01],且心室肌组织纤维化程度明显升高(左室:24.1%±4.8%比8.5%±1.9%,P<0.01;右室:17.2%±5.2%比11.8%±3.9%,P<0.01).与假手术组和RSD组相比,心衰组犬心室中TGF-β表达明显增加,心室肌组织及血清中BNP,AngⅡ和醛固酮水平明显升高.结论 RSD可抑制长期快速心室起搏引起的心室肌基质重构.Objective To explore the role of renal sympathetic denervation (RSD) on ventricular substrate remodeling in dogs with pacing-induced heart failure (HF).Methods A total of 19 dogs were randomized into 3 groups of sham-operated control (n =7),right ventricular pacing induction of HF (n =6) and RSD (n =6).After 8-week pacing induction of HF.Hemodynamic variables were monitored at baseline and after HF.Masson's trichrome staining,enzyme-linked immunosorbent assay (ELISA) and Western blot were used to measure ventricular interstitial fibrosis,brain natriuretic peptide (BNP),angiotensin Ⅱ (Ang Ⅱ),aldosterone and transforming growth factor-beta (TGF-β).Results All dogs in HF and HF + RSD groups showed increased left and right ventricular diastolic dimensions [left ventricle:(27.0 ± 2.4) vs (37.0 ±2.8) mm,P〈0.01 and (30.0 ±2.5) vs (36.0 ±2.8) mm,P〈0.05; right ventricle:(11.0 ± 1.5) vs (14.0±1.7) mm,P=0.03 and (12.0±1.1) vs (14.0±1.2) mm,P〈0.05].Compared with HF + RSD dogs,HF dogs had higher left ventricular end-diastolic pressure (LVEDP) [(25.0 ± 3.7) vs (3.3 ± 1.6) mmHg,P 〈0.01] and more fibrous tissue (left ventricle:24.1% ±4.8% vs 8.5% ± 1.9%,P 〈 0.01 ; right ventricle:17.2% ± 5.2% vs 11.8% ± 3.9%,P 〈 0.01).The levels of BNP,Ang Ⅱ,aldosterone and TGF-β in ventricular tissue increased in HF dogs compared to sham-operated and HF + RSD dogs.Conclusion RSD could suppress ventricular substrate remodeling induced by long-term rapid ventricular pacing.
分 类 号:R541.6[医药卫生—心血管疾病]
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