Abstract
Introduction
Psoriasis is a chronic inflammatory disease with a strong genetic background, particularly the human leukocyte antigen (HLA). HLA-Cw6 has been shown to be the major disease susceptibility locus and affects the phenotypes and treatment response in psoriasis; however, the prevalence of HLA-Cw6 is far lower than HLA-Cw1 in some Asian countries.
Objectives
The aim of this study was to determine whether HLA-Cw1 predisposes psoriasis patients to different treatment responses of biologics and other systemic therapy.
Methods
This retrospective case-control study included 126 patients with moderate to severe plaque-type psoriasis who had been genotyped and treated in a special psoriasis clinic. HLA-Cw1-positive and -negative patients were compared.
Results
Our results showed that HLA-Cw1-negative patients were significantly more likely to respond (achieve Psoriasis Area and Severity Index [PASI] 75 after a 12- to 16-week treatment course) to biologics (including etanercept, adalimumab, ustekinumab, secukinumab, ixekizumab, and guselkumab; odds ratio [OR] 1.99, 95% confidence interval [CI] 1.17–3.44, p = 0.0122) and especially to ustekinumab (OR 3.27, 95% CI 1.03–11.30; p = 0.0496). An HLA-Cw1 allele dose effect was also found. The results remained after multivariate logistic regression analysis. HLA-Cw1-negative patients also showed significantly greater improvement of PASI in ustekinumab and biologics (p = 0.0044 and p = 0.0064, respectively), with other biologics showing non-significant trends. HLA-Cw1 status did not affect the treatment responses of non-biologic systemic treatment, including phototherapy.
Conclusion
There is an association between HLA-Cw1 and treatment response to biologics, but not to non-biologics, in our Asian population of patients with moderate to severe psoriasis; however, the exact mechanism and role of HLA-Cw1 remain to be investigated.
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No sources of funding were received to assist in the preparation of this article.
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Shin-Shin Ho has no conflicts of interest that are directly relevant to the contents of this article. Tsen-Fang Tsai has conducted clinical trials or received honoraria for serving as a consultant for Abbvie, Boehringer Ingelheim, Bristol-Myers Squibb, Celgene, Eli Lilly, Galderma, Janssen-Cilag, Merck Sharp & Dohme, Novartis International AG, Pfzer Inc., and UCB Pharma.
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This study has been approved by the local Institutional Review Board (20190412RINC, 200712123R).
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The data that support the findings of this study are available from the corresponding author upon reasonable request.
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All authors contributed to the study conception and design. The literature search and data analysis were performed by Shin-Shin Ho and Tsen-Fang Tsai. The first draft of the manuscript was written by Shin-Shin Ho and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.
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Ho, SS., Tsai, TF. Associations between HLA-Cw1 and Systemic Treatment Response of Asian Psoriasis Patients. Mol Diagn Ther 26, 541–549 (2022). https://doi.org/10.1007/s40291-022-00603-4
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DOI: https://doi.org/10.1007/s40291-022-00603-4