Association of PTPN22 and NLRP3 Gene Polymorphisms with Psoriasis Susceptibility in a Han Chinese Population.

OBJECTIVE

To investigate the associations among protein tyrosine phosphatase (PTPN22), nucleotide-binding oligomerization domain-like receptor protein 3 (NLRP3) and genetic susceptibility to psoriasis in the Jiujiang population.

METHODS

A total of 120 psoriasis patients and 90 healthy controls were enrolled. Polymerase chain reaction-based sequencing was performed to determine the distribution of PTPN22 rs1310182, rs2488457, and NLRP3 rs10754558 genotypes. Logistic regression analysis was conducted to evaluate the associations between the genotypes, alleles, and genetic models of these three loci and psoriasis susceptibility. The associations between these polymorphisms and disease subtypes or severity were also explored.

RESULTS

With respect to the PTPN22 rs2488457 locus, the GG genotype and G allele were identified as risk factors for psoriasis susceptibility (p = 0.026 and p = 0.004, respectively). In the dominant model, carriers of the GG genotype exhibited a significantly higher risk of psoriasis than did those with the GC+CC genotype (p = 0.016). No significant associations were observed between the rs1310182 or rs10754558 polymorphisms and psoriasis susceptibility (p > 0.05). In addition, none of the three loci were significantly correlated with the disease subtype or severity (p > 0.05).

CONCLUSIONS

In the Jiujiang population, the GG genotype and G allele of the PTPN22 rs2488457 locus may be key factors influencing psoriasis susceptibility.