DHDermatological Health3083-47752981-8206Bio-Byword Scientific Publishing Pty. Ltd.10.26689/dh.v2i1.6496ArticleInfluence of ABCB1 3435C>T Polymorphism on Methotrexate Safety in Patients with Psoriasis — A Secondary Publicationhttps://artdesignp.com/journal/DH/2/1/10.26689/dh.v2i1.6496КubanovАlexey А.,АsoskovaАnastasiia V.,ZastrozhinMichael S.,SozaevaZhannet A.,SychevDmitry A.2024212024-03-29Background: Methotrexate is a highly effective systemic treatment for moderate to severe psoriasis, but drug toxicity may limit its use. Recent evidence suggests that it is necessary to take into account the individual characteristics of methotrexate pharmacokinetics, which are determined by the presence of polymorphisms of genes encoding methotrexate carrier proteins, to predict the risk of methotrexate-induced toxicity. Aim: The research aims to assess the associations of ABCB1 rs1045642 (3435C>T) polymorphism with methotrexate safety for patients with moderate and severe psoriasis. Methods: The study included 75 psoriasis patients treated with methotrexate with 21 days of follow-up duration. Data on adverse drug reactions (ADR) were collected using a clinically structured questionnaire, and complete and biochemical blood tests, and urinalysis were performed. The severity of ADR was assessed using visual analog scales and the CTCAE toxicity scale. The severity of gastrointestinal ADR was assessed using the GSRS questionnaire. Genotyping was carried out by real-time PCR. Results: Gastrointestinal toxicity was detected in 38 patients (50.67%). The mean GSRS score was 7.97 ± 9.18. Analysis of differences in the ADR incidence showed the presence of statistically significant differences in the frequency of ADR in the gastrointestinal tract: the toxic effect of methotrexate was more often observed in carriers of the T allele of the ABCB1 rs1045642 polymorphism (3435C>T), (CC: 2 (14.3%), TC: 18 (52.9%), TT: 18 (66.7%), P = 0.006). Binomial regression demonstrated the presence of a statistically significant effect of the rs1045642 single-nucleotide polymorphism of the ABCB1 gene on the incidence of ADR from the gastrointestinal tract (OR = 8.64, P = 0.008). Conclusion: An association of ABCB1 rs1045642 single-nucleotide polymorphism with the safety of methotrexate therapy in patients with moderate and severe psoriasis was revealed. The data obtained can be used to personalize the prescription of methotrexate to psoriasis patients.

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