首页> 外文期刊>American Journal of Physiology >Latent adenoviral infection induces production of growth factors relevant to airway remodeling in COPD.
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Latent adenoviral infection induces production of growth factors relevant to airway remodeling in COPD.

机译:潜在的腺病毒感染可诱导COPD中与气道重塑有关的生长因子的产生。

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Previous studies showed an association between latent adenoviral infection with expression of the adenoviral E1A gene and chronic obstructive pulmonary disease (COPD). The present study focuses on how the adenoviral E1A gene could alter expression of growth factors by human bronchial epithelial (HBE) cells. The data show that connective tissue growth factor (CTGF) and transforming growth factor (TGF)-beta 1 mRNA and protein expression were upregulated in E1A-positive HBE cells. Upregulation of CTGF in this in vitro model was independent of TGF-beta secreted into the growth medium. Comparison of E1A-positive with E1A-negative HBE cells showed that both expressed cytokeratin but only E1A-positive cells expressed the mesenchymal markers vimentin and alpha-smooth muscle actin. We conclude that latent infection of epithelial cells by adenovirus E1A could contribute to airway remodeling in COPD by the viral E1A gene, inducing TGF-beta 1 and CTGF expression and shifting cells to a more mesenchymal phenotype.
机译:先前的研究表明,潜在的腺病毒感染与腺病毒E1A基因的表达与慢性阻塞性肺疾病(COPD)之间存在关联。本研究的重点是腺病毒E1A基因如何通过人支气管上皮细胞(HBE)改变生长因子的表达。数据显示,在E1A阳性HBE细胞中,结缔组织生长因子(CTGF)和转化生长因子(TGF)-beta 1 mRNA和蛋白表达被上调。在此体外模型中,CTGF的上调与分泌到生长培养基中的TGF-β无关。 E1A阳性和E1A阴性的HBE细胞的比较表明,两者均表达细胞角蛋白,但仅E1A阳性细胞表达间质标记波形蛋白和α平滑肌肌动蛋白。我们得出的结论是,腺病毒E1A潜在感染上皮细胞可能通过病毒E1A基因导致COPD气道重塑,诱导TGF-β1和CTGF表达并使细胞转变为间充质表型。

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