Matrix metalloproteinase-9 gene polymorphisms in nasal polyposis.

Area of Science:

• Genetics
• Immunology
• Otolaryngology

Background:

• Matrix metalloproteinase (MMP) plays a role in upper airway remodeling.
• Chronic rhinosinusitis with nasal polyposis (CRSwNP) involves upper airway remodeling.
• The MMP-9 gene's role in CRSwNP susceptibility is not fully understood.

Purpose of the Study:

• To investigate the association between genetic variants of the MMP-9 gene and CRSwNP.
• To identify specific MMP-9 gene polymorphisms that may influence susceptibility to CRSwNP.

Main Methods:

• A case-control study was conducted with 203 CRSwNP cases and 730 controls.
• Four single nucleotide polymorphisms (SNPs) in the MMP-9 gene were genotyped.
• Statistical analyses included Hardy-Weinberg equilibrium testing, inheritance model evaluation, and haplotype analysis.

Main Results:

• The T allele of the promoter SNP rs3918242 was significantly associated with CRSwNP under dominant and additive models (p < 0.023).
• SNP rs2274756 also showed associations with CRSwNP under dominant and additive models (p < 0.034).
• Haplotype analysis revealed a significant global p-value (0.015), indicating an overall association between MMP-9 haplotypes and CRSwNP.

Conclusions:

• MMP-9 gene polymorphisms may contribute to the susceptibility of developing chronic rhinosinusitis with nasal polyposis.
• Specific MMP-9 SNPs and haplotypes are associated with CRSwNP in the studied Chinese population.
• Further research is warranted to elucidate the precise mechanisms.