肺高压肺血管重建大鼠基质金属蛋白酶1基因表达

Gene Expression of MMP-1 of Pulmonary Vascular Remodeling in Rats with Pulmonary Hypertension

摘要:

目的： 探讨基质金属蛋白酶1(MMP1)基因表达与肺高压形成的关系。方法： 利用野百合碱(monocrotalineMCT)诱导的大鼠肺高压动物模型,经导管介入测定大鼠肺动脉平均压力,逆转录定量聚合酶链反应(RT PCR)检测不同时间点大鼠肺组织MMP 1mRNA相对表达水平。结果： 实验第3周肺动脉压力已明显升高,以第4周为最高,而大鼠肺组织MMP 1mRNA表达水平以实验第2周最为明显,第3,4周表达水平下调,但仍高于第1周。结论： MMP1早期基因表达升高参与细胞外基质屏障的降解,对肺血管重建可能起了触发作用,实验后期表达水平下调可能是导致细胞外基质积聚的重要原因之一。

Abstract:

OBJECTIVE: To explore the etiology of pulmonary hypertension with relation to the pulmonary expression of matrix metalloprotease1 (MMP 1). METHODS: The pulmonary hypertension animal models were induced by monocrotaline (MCT), the pulmonary arterial pressure was measured by cathetrization, and the pulmonary MMP 1 mRNA expression was studied by RT PCR. RESULTS: The pulmonary arterial pressure increased significantly in the 3rd week after the induction of MCT and reached the peak in the 4th weak; the pulmonary MMP 1 mRNA expression increased significantly in the 2nd week and then decreased greatly in the 3rd week, and still it was higher than that in the 1st weak. CONCLUSIONS: Changed MMP 1 expression might play a part in the development of pulmonary hypertension. MMP 1 overexpression might play the role of target during the earlier stage of pulmonary arterial remodeling.