764-3对不同类型慢性肺动脉高压大鼠右心室肥厚胶原的影响

目的：观察胶原合成抑制剂７６４－３对低压缺氧和野百合碱（ＭＣＴ）引起的肺动脉高压大鼠右心室胶原的影响。方法：将雄性Ｗｉｓｔａｒ大志随机分为１０组。低人药组大鼠皮下注射７６４－３ ２０ｍｇ／ｋｇ，每日１次ＭＣＴ治疗组大鼠皮下注射７６４－３４０ｍｇ／ｋｇ，每日１次。实验终点测定血流动力学及生化指标。结果：缺氧２周、４周及ＭＣＴ大志肺动脉压升高，右心室胶原含量明显增加；７６４－３能降低缺氧及ＭＣＴ大鼠肺

Effect of 764-3 on Ventricular Collagen Deposition in Pulmonary Hypertension Induced by Chronic Hypoxia and Monocrotaline in Rats

OBJECTIVE: To observe the effect of 764-3 on ventricular collagen deposition in pulmonary hypertension induced by chronic hypoxia or monocrotaline (MCT) in rats. METHODS: Wistar rats were divided into 10 groups. The hypobaric hypoxia group received 764-3 20 mg/kg once daily subcutaneously and the MCT group treated with 764-3 40 mg/kg once daily. The hemodynamic and biochemical parameters were measured. RESULTS: At the time of 2 weeks and 4 weeks after treated with hypoxia or MCT, the pulmonary arterial pressure (PAP) of rats raised significantly and the right ventricular collagen content (RVCC) increased markedly. 764-3 could reduce the raised PAP induced either by hypoxia or MCT. It could lower the elevated RVCC of hypobaric hypoxia group at 2 weeks from 76.3 +/- 13.3 to 59.4 +/- 11.4 (P < 0.01), and the RVCC of MCT group lowered from 293.4 +/- 73.9 to 210.1 +/- 37.6(P < 0.01). CONCLUSION: 764-3 could partially prevent right ventricular collagen deposition induced by hypoxia and has therapeutic effect on that induced by MCT.