Abstract: 【Abstract】 Objective To investigate the relationship of polymorphisms in metabolic syndrome-related genes with psoriasis vulgaris （PsV） and their interaction with HLA-C*06:02 in populations of Mongolian nationality. Methods Totally, 379 PsV inpatients of Mongolian nationality and 518 healthy controls of Mongolian nationality were collected from the Affiliated Hospital of Inner Mongolia Medical University from December 2012 to March 2018. Sixteen previously reported single nucleotide polymorphisms （SNPs） and HLA-C*06:02, which were related to metabolic syndrome and its components, were selected. Next-generation sequencing and polymerase chain reaction-sequence specific primer （PCR-SSP） typing were performed to determine the genotypes of these subjects. Minor allele frequencies of the 16 mutation sites and HLA-C*06:02 were calculated in the PsV group and control group, and chi-square test was used to analyze the differences in the minor allele frequencies of SNPs between the 2 groups. Results There was no significant difference in the minor allele frequencies of the 16 SNPs susceptible to metabolic syndrome between the Mongolian PsV patients and healthy controls （all P > 0.05）, while the minor allele frequency of HLA-C*06:02 significantly differed between the 2 groups （P = 4.09 × 10-35, OR = 3.41）. Among the HLA-C*06:02-positive subjects, the minor allele frequencies of rs7593730_T and rs6931514_G significantly differed between the 252 PsV patients and 191 healthy controls （P = 0.016, OR = 0.64; P = 0.041, OR = 1.33, respectively）; no significant difference was observed in the minor allele frequencies of the 16 SNPs between the PsV patients and healthy controls among the HLA-C*06:02-negative subjects （P > 0.05）. Conclusion The SNPs of rs7593730 and rs6931514 may be related to PsV in populations of Mongolian nationality in Inner Mongolia, and may interact with HLA-C*06:02.

Key words: Psoriasis, Metabolic diseases, Polymorphism, single nucleotide, Mongolian, HLA?C*06:02