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Polymorphisms in metalloproteinase-9 are associated with the risk for asthma in Mexican pediatric patients

Silvia Jiménez-Morales1, Nora Martínez-Aguilar, Roberto Gamboa-Becerra

  • 1Laboratorio de Inmunogenómica y Enfermedades Metabólicas, Instituto Nacional de Medicina Genómica, SS, Mexico City, Mexico.

Human Immunology
|May 4, 2013
PubMed

Insights

Specific gene variations in Matrix metalloproteinase-9 (MMP-9) are linked to increased risk of childhood asthma in Mexican children. These MMP-9 single-nucleotide polymorphisms (SNPs) may influence asthma susceptibility and severity.

Area of Science:

  • Genetics
  • Pulmonology
  • Immunology

Background:

  • Asthma involves chronic airway inflammation and extracellular matrix remodeling.
  • Matrix metalloproteinases (MMPs), particularly MMP-9, are implicated in asthma pathogenesis.
  • The role of MMP-9 single-nucleotide polymorphisms (SNPs) in asthma susceptibility remains debated.

Purpose of the Study:

  • To investigate the association between MMP-9 SNPs and childhood-onset asthma in a Mexican population.
  • To determine if specific MMP-9 genetic variations contribute to asthma risk and atopy.

Main Methods:

  • A case-control study was conducted with 403 children diagnosed with asthma and 426 healthy controls from Mexico.
  • Cases and controls were matched for ethnicity and gender.
  • Genotyping was performed for specific MMP-9 SNPs, including rs2274755, rs17577, and rs3918249.

Main Results:

  • SNPs rs2274755 and rs17577 showed significant associations with increased asthma risk (OR=2.10 and 2.07, respectively) and were in strong linkage disequilibrium.
  • These two SNPs were also associated with atopic asthma.
  • SNP rs3918249 demonstrated a female gender-dependent association with asthma risk.

Conclusions:

  • MMP-9 polymorphisms, specifically rs2274755 and rs17577, are associated with increased susceptibility to childhood-onset asthma in the studied Mexican population.
  • The findings suggest that MMP-9 genetic variations play a role in the predisposition to childhood asthma, particularly atopic forms.
  • Further research is warranted to elucidate the functional mechanisms linking these MMP-9 SNPs to asthma pathogenesis.

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