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Genetic polymorphism in matrix metalloproteinase-9 and the susceptibility to chronic obstructive pulmonary disease in Han population of south China
Authors:Zhou Min  Huang Shao-guang  Wan Huan-ying  Li Biao  Deng Wei-wu  Li Min
Institution:1. Department of Pulmonary Medicine,Ruijin Hospital,Shanghai Second Medical University,Shanghai 200025,China
2. Department of Nuclear Medicine,Ruijin Hospital,Shanghai Second Medical University,Shanghai 200025,China
Abstract:Background There are many candidate genes for chronic obstructive pulmonary disease (COPD). Matrix metalloproteinase-9 (MMP-9) plays an essential role in tissue remodeling and repair associated with development of COPD. In this study we investigated the correlation between MMP-9 gene polymorphism and COPD susceptibility in the Han population of South China.Methods We examined the frequency of polymorphic genotypes of the MMP-9 promoter (-1562C/T) in 100 COPD patients and 98 healthy smokers by restriction fragment length polymorphism.Results The frequencies of polymorphic genotypes in promoters of MMP-9 were C/C 86%, C/T 14% in COPD group; and C/C 98%, C/T 2% in the control group. There were significant differences between the two groups (P<0.01). The allele frequencies were also significantly different between the COPD group and the control group (C allele frequency: 93% vs 99%, T allele frequency: 7% vs 1%, P<0.05 respectively).Conclusion The genetic polymorphism in promoters of MMP-9 gene is associated with the susceptibility to COPD in the Han population of South China.
Keywords:pulmonary disease  chronic obstructive  matrix metalloproteinase-9  genetic polymorphism
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