Association of Matrix Metalloproteinase-9 Genotypes With Nasopharyngeal Carcinoma Risk

Area of Science:

• Genetics and Oncology
• Cancer Biomarkers
• Molecular Epidemiology

Background:

• Matrix metalloproteinase-9 (MMP-9) up-regulation is common in cancers, including nasopharyngeal carcinoma (NPC).
• The specific impact of MMP-9 genetic variations on NPC susceptibility is not well understood.
• This study investigates the role of MMP-9 promoter rs3918242 genotypes in NPC risk.

Purpose of the Study:

• To evaluate the association between MMP-9 rs3918242 genotypes and NPC risk in a Taiwanese population.
• To explore potential interactions between MMP-9 genotypes and environmental risk factors (betel quid chewing, smoking, alcohol consumption) in NPC development.

Main Methods:

• Genotyping of the MMP-9 rs3918242 polymorphism was performed using polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP).
• A case-control study design was employed, including 208 NPC patients and 416 healthy controls.
• Statistical analyses, including odds ratios (OR) and 95% confidence intervals (95%CI), were used to assess risk.

Main Results:

• No significant association was found between MMP-9 rs3918242 CT or TT genotypes and overall NPC risk compared to the CC genotype.
• The variant T allele of MMP-9 rs3918242 did not alter NPC risk.
• A significant protective effect of the MMP-9 rs3918242 CT genotype against NPC was observed in individuals who did not chew betel quid (OR=0.51, 95%CI=0.30-0.87, p=0.0166).

Conclusions:

• The MMP-9 rs3918242 polymorphism does not appear to be a major risk factor for NPC in the studied population.
• The MMP-9 rs3918242 CT genotype may confer a protective effect against NPC, particularly in non-betel quid chewers.
• Further research is warranted to elucidate the mechanisms underlying this observed protective association.