HLA-C and psoriasis: Other HLA alleles, including HLA-C*18:01, a rare allele in Europeans,4-C*12:02 and -C*07:04 in Japan,5-C*01 in Asia,6-C*12,7 and HLA-B and HLA-A, are associated with psoriasis globally.2, 8, 9 Class II HLA genes are less commonly associated with links to HLA-DPB1*05:01 in China10 and HLA-DQα1 amino acid position 53 in a cohort of 9,247 Europeans.11