methotrexate pharmacogenetics in psoriasis
In this study published in the August issue of the Journal of Investigative Dermatology the authors report what is the first study of methotrexate pharmacogenetics in psoriasis. The authors identified several polymorphisms in enzymes involved in folate, purine, and pyrimidine metabolism, especially thymidylate synthase and the reduced folate carrier, that where related to the clinical response to methotrexate (and could serve as predictive markers of methotrexate efficacy and toxicity in psoriasis in the future). In addition the authors also confirm the importance of administering folic acid supplements to patients receiving methotrexate. Those patients that did not receive folic acid supplementation were more than twice as likely to discontinue the drug, and the impact of polymorphisms associated with methotrexate-induced adverse events was attenuated or disappeared if folic acid had been prescribed. (more…)
