特发性肺纤维化(idiopathic pulmonary fibrosis,IPF)是一种病因复杂且缺乏有效治疗手段的严重慢性肺部疾病.该研究通过构建转基因小鼠模型,特异性地在肺泡Ⅱ型上皮细胞中过表达肺表面活性蛋白B(surfactant protein B,SP-B),探讨其在IPF中的功能及其作用机制.研究结果发现了SP-B的过表达会导致小鼠肺组织结构受损、细胞外基质异常沉积,并引发肺部炎症反应,揭示了SP-B在IPF病理进程中的重要作用.此外,SP-B可能通过调控TGF-β信号通路影响细胞增殖和细胞外基质蛋白表达,从而促进肺纤维化的发展.该研究为IPF的病因学研究提供了新的视角,并为基于Sftpb基因的治疗策略提供了潜在的靶点.
Abstract
IPF(idiopathic pulmonary fibrosis)is a severe chronic lung disease with complex etiology and lacking effective treatment.This study aimed to investigate the function and mechanism of pulmonary SP-B(sur-factant protein B)in IPF by constructing a transgenic mouse model that specifically overexpressed SP-B in alveolar type Ⅱ epithelial cells.The overexpression of SP-B led to structural damage in lung tissue,abnormal extracellular matrix deposition,and pulmonary inflammation,highlighting its critical role in IPF pathogenesis.Furthermore,SP-B promoted pulmonary fibrosis by regulating the TGF-β signaling pathway to affect cell proliferation and ex-tracellular matrix protein expression.These findings offer new insights into the etiology of IPF and potential targets for Sftpb gene-based therapeutic strategies.
关键词
肺表面活性蛋白B/特发性肺纤维化/肺泡Ⅱ型上皮细胞/基因过表达
Key words
pulmonary surfactant protein B/idiopathic pulmonary fibrosis/alveolar type Ⅱ epithelial cells/gene overexpression
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