Transforming growth factor-β1 polymorphisms, airway responsiveness and lung function decline in smokers
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- 作者：Emiko Ogawa ; Jian Ruan ; John E. Connett ; Nicholas R. Anthonisen ; Peter D. Paré ; ; Andrew J. S ; ford
- 关键词：Forced expiratory volume ; Genetic predisposition to disease ; Airway hyperresponsiveness
- 刊名：Respiratory Medicine
- 出版年：2007
- 出版时间：May 2007
- 年：2007
- 卷：101
- 期：5
- 页码：938-943
- 全文大小：229 K
文摘
Chronic obstructive pulmonary disease (COPD) is characterized by chronic inflammation in the airways, parenchyma and vessels, which can cause a structural remodeling with increased fibrosis that narrows and fixes the airway lumen. Transforming growth factor-β1 (TGF-β1), a multifunctional growth factor, was reported to be increased in the airways of COPD patients. In this study, we hypothesized that polymorphisms in the TGF-β1 gene would be associated with an accelerated rate of decline of forced expiratory volume in 1 s (FEV1). Three polymorphisms, −509 (C→T), +869 (T→C) and +915 (G→C), located in TGF-β1 gene were genotyped. We determined the prevalence of these polymorphisms in 590 continuing smokers who had the fastest (n=283) and slowest (n=307) rate of decline of lung function from the NHLBI Lung Health Study. There was no association between these TGF-β1 polymorphisms and the rate of decline of FEV1, but in a post-hoc analysis the genotype distribution at +869 was significantly different between high and low responders to methacholine (P=0.04). These data suggest that the T–C polymorphism at position +869 in the TGF-β1 gene contributes to airway hyperresponsiveness, but not to rapid decline of lung function.