Polymorphisms in oxidative pathway related genes and susceptibility to inflammatory bowel disease.

AIM

To investigate whether common variants in the oxidative pathway genes influence inflammatory bowel disease (IBD) risk among Moroccan patients.

METHODS

The distribution of (TAAA)n_rs12720460 and (CCTTT)n _rs3833912 microsatellite repeats, -_rs11549467 and -94ins/delATTG_rs28362491 was analyzed in 507 subjects grouped in 199 IBD and 308 healthy controls. Genotyping was performed with polymerase chain reaction-fluorescent method and the TaqMan allelic discrimination technology.

RESULTS

The allele and genotype frequencies of _ rs11549467, _rs28362491 and _ (TAAA)n did not differ significantly between patients and controls. Analysis of _ (CCTTT)n markers evidenced differences between patients and healthy controls. A preferential presence of the (CCTTT)8 ( = 0.02; OR = 1.71, 95%CI: 1.07-2.74), (CCTTT)14 ( = 0.02; OR = 1.71, 95%CI: 1.06-2.76) alleles in IBD, (CCTTT)8 ( = 0.008; OR = 1.95, 95%CI: 1.17-3.23) in CD and (CCTTT)7 ( = 0.009; OR = 7.61, 95%CI: 1.25-46.08), (CCTTT)11 ( = 0.05; OR = 0.51, 95%CI: 0.25-1.01), (CCTTT)14 ( = 0.02; OR = 2.05, 95%CI: 1.07-3.94), (CCTTT)15 ( = 0.01; OR = 2.25, 95%CI: 1.16-4.35) repeats in UC patients indicated its possible association with higher disease risk which need to be confirmed in a larger sample size.

CONCLUSION

Our results suggest that the _ (CCTTT)n gene variations may influence IBD susceptibility in the Moroccan population.