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Transforming growth factor-β1 polymorphisms and chronic obstructive pulmonary disease: a meta-analysis
1School of Health Management, Anhui Medical University, Hefei, Anhui, China.
Summary
The Transforming growth factor-β 1 (TGF-β 1) T869C gene polymorphism is associated with chronic obstructive pulmonary disease (COPD) risk, particularly in Caucasian populations. The C-509T polymorphism showed no significant link to COPD.
Area of Science:
- Genetics
- Pulmonology
- Molecular Biology
Background:
- Chronic obstructive pulmonary disease (COPD) is a complex polygenic condition influenced by gene-environment interactions.
- Transforming growth factor-β 1 (TGF-β 1) is a candidate gene implicated in COPD pathogenesis due to its polymorphic nature.
Purpose of the Study:
- To precisely evaluate the association between TGF-β 1 gene polymorphisms (T869C and C-509T) and COPD risk.
- To conduct a meta-analysis of existing case-control studies for robust statistical power.
Main Methods:
- Meta-analysis of 11 published case-control studies.
- Included 1507 cases and 2542 controls for T869C polymorphism.
- Included 955 cases and 2136 controls for C-509T polymorphism.
- Analyzed pooled odds ratios for various genetic models and performed ethnicity-based subgroup analysis for T869C.
Main Results:
- A significant association was found between the TGF-β 1 T869C polymorphism and COPD in the overall analysis (C vs. T: OR 0.82, P = 0.01).
- Subgroup analysis revealed a significant association in Caucasians (C vs. T: OR 0.77, P = 0.03) but not in Asians (C vs. T: OR 0.88, P = 0.10).
- The TGF-β 1 C-509T polymorphism did not show a significant association with COPD (T vs. C: OR 0.84, P = 0.11).
Conclusions:
- The TGF-β 1 T869C polymorphism may contribute to COPD susceptibility with low penetrance.
- This association appears to be ethnicity-specific, with a notable effect in Caucasian populations.
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