端粒酶逆转录酶在野百合碱性大鼠肺动脉高压中的作用

The role of telomerase reverse transcriptase in monocrotaline-induced pulmonary hypertension in rats

目的:观察端粒酶逆转录酶(TERT)在野百合碱(MCT)性肺动脉高压(PH)大鼠模型中的肺组织中的表达变化。方法:用MCT复制大鼠慢性PH病理模型,用电磁血流量计观察肺血流动力学指标变化,用免疫组化法和图像分析技术测定肺组织中TERT的表达。结果:发现TERT可在大鼠肺血管平滑肌、支气管平滑肌和软骨组织中表达,并且MCT组肺组织中TERT表达较正常组呈明显阳性。结论:MCT性PH时TERT在肺血管平滑肌、支气管平滑肌的过度表达在MCT性PH的发病机制中可能具有重要意义。

AIM and METHODS: To explore the role of telomerase reverse transcriptase (TERT) in monocrotaline-induced pulmonary hypertension (PH), TERT was investigated by using immunohistochemistry and image analysis on the chronic PH induced by MCT in Sprague-Dawley rats. RESULTS: TERT was positive in pulmonary vascular smooth muscle cells, bronchial smooth muscle cells and chondrocytes in normal group. TERT in MCT group was more positive in pulmonary vascular smooth muscle cells and bronchial smooth muscle cells compared with normal group. CONCLUSION: Over expression of TERT in pulmonary vascular smooth muscle cells and bronchial smooth muscle cells is related to MCT-induced PH.