Genetic polymorphism in matrix metalloproteinase-9 and the susceptibility to chronic obstructive pulmonary disease in Han population of south China

Chin Med J (Engl). 2004 Oct;117(10):1481-4.


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.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adult
  • Aged
  • China / ethnology
  • Female
  • Gene Frequency
  • Genetic Predisposition to Disease*
  • Genotype
  • Humans
  • Male
  • Matrix Metalloproteinase 9 / genetics*
  • Middle Aged
  • Polymorphism, Genetic*
  • Promoter Regions, Genetic
  • Pulmonary Disease, Chronic Obstructive / genetics*


  • Matrix Metalloproteinase 9