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MMP12, lung function, and COPD in high-risk populations.

Gary M Hunninghake¹, Michael H Cho, Yohannes Tesfaigzi

¹Channing Laboratory and Center for Genomic Medicine, Brigham and Women's Hospital, Boston, MA 02115, USA.

The New England Journal of Medicine

|December 19, 2009

Summary

Genetic variants in the MMP12 gene impact lung function and reduce the risk of developing chronic obstructive pulmonary disease (COPD) in smokers. This discovery offers new insights into COPD prevention strategies.

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Area of Science:

Genetics
Pulmonology
Epidemiology

Background:

Genetic factors play a role in lung function and the development of chronic obstructive pulmonary disease (COPD).
Understanding genetic predispositions is crucial for identifying high-risk populations for COPD.
Matrix metalloproteinase 12 (MMP12) is a gene of interest in respiratory health.

Purpose of the Study:

To investigate the association between single-nucleotide polymorphisms (SNPs) in the MMP12 gene and lung function (FEV(1)).
To determine if MMP12 SNPs associated with lung function predict the onset of COPD.
To examine the relationship between MMP12 SNPs and COPD risk in various adult cohorts.

Main Methods:

Analyzed over 8300 subjects across seven cohorts, including children and adults.
Utilized prebronchodilator forced expiratory volume in 1 second (FEV(1)) as the primary lung function measure.
Employed survival analysis (Normative Aging Study) and case-control studies to assess COPD risk.

Main Results:

The minor allele (G) of MMP12 SNP rs2276109 was significantly associated with improved FEV(1) in children with asthma and adult smokers (P=2x10(-6)).
This protective allele demonstrated a reduced risk of COPD onset in the Normative Aging Study cohort (HR=0.65, P=0.02).
Further reduced COPD risk was observed in a cohort of smokers (OR=0.63, P=0.005) and in a family-based study of early-onset COPD (P=0.006).

Conclusions:

A specific SNP in the MMP12 gene (rs2276109) positively influences lung function in children with asthma and adult smokers.
This MMP12 variant is associated with a decreased risk of developing COPD among adult smokers.
Findings suggest MMP12 genetic variants may be important biomarkers for COPD risk and lung health.