Interaction Between Cigarette Smoking and PARK16 on Parkinson's Disease.

Research overview

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Parkinson's disease (PD) is influenced by genetic and environmental factors. Epidemiological evidence indicates that smoking is associated with reduced PD risk, potentially through oxidative stress-related pathways. PARK16 is a PD-susceptibility locus also implicated in oxidative stress regulation. This study examined gene-environment interaction involving smoking and a PARK16 single nucleotide polymorphism (SNP). A case-control study involving 999 Chinese subjects (497 cases, 502 controls) was conducted. PARK16 SNP rs6679073 (NC_000001.11:g.205787356C>A) was identified in a genome-wide association study in an Asian population. Logistic regression estimated adjusted odds ratios (ORs), controlling for age, sex, family history, and comorbidities. Gene-environment interactions were assessed using both additive (RERI, AP, and S) and multiplicative models. Smoking was not significantly associated with PD risk in the cohort (adjusted OR 0.78, 95% CI 0.54-1.12, and p = 0.179). rs6679073 was significantly associated with increased PD risk under the recessive model (AA vs. CC/CA: adjusted OR 1.47, 95% CI 1.11-1.93, and p = 0.007). An additive interaction between rs6679073 and smoking was observed (RERI 0.85, 95% CI 0.21-1.50; AP 0.51, 95% CI 0.12-0.89). These findings suggest a biologically plausible interaction between PARK16 rs6679073 and cigarette smoking in modulating PD risk and warrants further investigation. Understanding gene-environment interactions may inform the design of mechanistic studies and contribute to risk stratification in susceptible populations.

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