December 2025 in “Çukurova medical journal (Online)/Çukurova medical journal” In this retrospective review, increased frequencies of certain HLA-DRB1 alleles and low vitamin D3 levels were observed in men with androgenetic alopecia, suggesting an association with immunogenetic factors and potential relevance for screening and treatment decisions.
36 citations
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July 2007 in “Journal of Investigative Dermatology” This study observed a strong negative association between the HLA-DQB1*0201 allele and the alopecia totalis/alopecia universalis phenotype in Caucasian individuals, indicating a potential protective role.
35 citations
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June 2011 in “British Journal of Dermatology” This study found that in an Italian population, the HLA-DQB1*03 allele was associated with increased susceptibility to alopecia areata, particularly in cases with more than 50% hair loss.
February 2009 in “Journal of The American Academy of Dermatology” Certain immune system genes are linked to a higher risk of psoriasis and psoriatic arthritis, while others may offer protection.
27 citations
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April 2018 in “Scientific Reports” This study found that in psoriasis patients, the K17 protein probably functions as an autoantigen, with the HLA-Cw*06:02 risk genotype strongly linked to the T cell response size.