培哚普利对异丙肾上腺素致大鼠心肌肥厚中H2S/CSE合成途径的影响

目的：研究在异丙肾上腺素(ISO)致大鼠心肌肥厚模型中,培哚普利对大鼠心肌组织硫化氢/胱硫醚-γ-裂解酶(H2 S/ CSE)合成途径的影响。方法40只大鼠随机均分为模型组、培哚普利+模型组、培哚普利对照组和空白对照组,采用皮下注射 ISO 制备心肌肥厚模型。检测大鼠心脏质量指数(HMI)和左心室质量指数(LVMI),心肌组织中 H2 S 含量及其生成酶活性,心肌组织中 CSE 蛋白表达情况。结果与空白对照组比较,模型组大鼠 HMI、LVMI 升高( P <0．01),心肌肥厚明显,H2 S 含量及其生成酶活性减少(P <0．01),CSE 表达下降(P <0．05),培哚普利对照组大鼠心肌H2 S 含量及其生成酶活性升高(P <0．01),CSE 表达增加(P<0．05)。与模型组比较,培哚普利+模型组大鼠 HMI、LV-MI 下降(P <0．01),心肌中 H2 S 含量及其生成酶活性升高(P <0．01),CSE 表达增加(P <0．05)。与培哚普利对照组比较,培哚普利+模型组大鼠 HMI、LVMI 升高(P <0．01),心肌中 H2 S 含量及其生成酶活性下降(P <0．01),CSE 表达下降(P <0．05)。结论培哚普利能够提高大鼠心肌中 H2 S含量及其生成酶活性,可能与其能够提高 CSE 表达,影响H2 S/ CSE 合成途径相关,其中在治疗 ISO 所致大鼠心肌肥厚模型中作用更加明显。

Perindopril affects the H2 S/CSE pathway in ISO-induced cardiac hypertrophy

Objective To investigate how perindopril affects myocardial hydrogen sulfide / cystathionine-γ-lyase ( H2 S / CSE) pathway in the model of isoprenaline (ISO)-induced cardiac hypertrophy rats. Methods 40 rats were randomly divided into a disease control group, a disease treated with perindopril group, a perindopril control group and a normal control group. Cardiac hypertrophy model was established by a subcutaneous injection of ISO. Heart mass index (HMI), left ventricular mass index (LVMI), the contents of H2 S, the activity of H2 S synthesizing en-zymes and the expression of CSE were calculated. Results Compared with the normal control group, HMI and LV-MI increased (P < 0. 01), myocardial tissue thickened obviously, the contents of H2 S and the activity of H2 S syn-thesizing enzymes decreased (P < 0. 01) and the expression of CSE also decreased (P < 0. 05) in the disease con-trol group. However, the contents of H2 S and the activity of H2 S synthesizing enzymes increased (P < 0. 01) and the expression of CSE increased (P < 0. 05) in the disease treated with perindopril group. Compared with the dis-ease control group, HMI and LVMI decreased (P < 0. 01), the contents of H2 S and the activity of H2 S synthesizing enzymes increased (P < 0. 01) and the expression of CSE also increased (P < 0. 05) in the disease treated with perindopril group. Compared with the perindorpril control group, HMI and LVMI increased (P < 0. 01), the con-tents of H2 S and the activity of H2 S synthesizing enzymes decreased (P < 0. 01) and the expression of CSE also de-creased (P < 0. 05) in the disease treated with perindopril group. Conclusion Perindopril can improve the con-tents of H2 S and the activity of H2 S synthesizing enzymes in myocardial tissue. It may be related to influence H2 S/ CSE pathway via enhancing the expression of CSE which affects more in ISO-induced cardiac hypertrophy rats.