【摘要】 目的:研究支气管哮喘(哮喘)肺组织和哮喘病人外周血淋巴细胞端粒酶逆转录酶(TERT)mRNA和蛋白质的表达,并探讨其在哮喘发病机制中的作用及其临床意义。方法:用核酸原位杂交和免疫组织化学方法检测了6只豚鼠哮喘模型组织、6只正常对照组肺组织、16例哮喘发作期和 14例正常人外周血淋巴细胞 TERT mRNA和蛋白质的表达。结果:哮喘豚鼠肺组织中气道上皮细胞和淋巴小结,以及哮喘病人外周血淋巴细胞TERT mRNA和蛋白质表达强度显著高于正常对照组,哮喘病人外周血淋巴细胞 TERT mRNA和蛋白质表达的阳性指数与哮喘病人 FEV1/预计值、MVV/预计值比值呈显著负相关,与血清IgE水平呈显著正相关。结论:(1)TERT在哮喘豚鼠气道上皮、肺淋巴小结和人体外周血淋巴细胞中表达上调;(2)检测人体外周血液中淋巴细胞对TERT表达强度有望可以作为衡量哮喘病情的指标。更多还原

【Abstract】 To investigate the expression of mRNA and protein of telomerase reverse transcriptase(TERT) in guinea pig asthmatic lung tissues and human circulating lymphocytes and to discuss the role of TERT in the pathogenesis of asthma and the clinical significance of expression of TERT in human asthmatic circulating lymphocytes in monitoring the state of asthma.Methods: In 6 guinea pig asthmatic lung tissues, 6 guinea pig normal lung tissues, 16 samples of circulating lymphocytes of asthmatic patients and 14 normal circulating lymphocytes the expression of mRNA and protein of TERT were detected with nuclei acid in situ hybridization and immunostaining. The expression of TERT in circulating lymphocyte were compared with pulmonary function and serum IgE level. Results:The expression of mRNA and protein were up-regulated in asthmatic airway epithelium and lymph nodule germinal center in guinea pig. Compared with control group,high expression were also showed in human asthmatic circulating lymphocytes.The index of TERT expressive positive lymphocytes showed negative correlation with FEV1/ predictive value and MW/predicn’ve value,positive correlation with serum IgE level. Conclusion: (1 )TERT expression in asthmatic airway epithelium and lymph nodule germinal centers of guinea pig and human circulating lymphocytes were up-regulated; (2)Detection of TERT expression of asthmatic circulating lymphocytes may be useful to monitor the state of asthma.更多还原