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TYMS Polymorphisms and Responsiveness to or Toxicity of Methotrexate in Rheumatoid Arthritis

Overview
Journal Z Rheumatol
Publisher Springer
Specialty Rheumatology
Date 2018 Jan 31
PMID 29380036
Citations 5
Authors
Affiliations
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Abstract

Objective: The aim of this study was to investigate whether the thymidylate synthase (TYMS) 2R/3R and 6 bp I/D polymorphisms can predict the response to or toxicity of methotrexate (MTX) in patients with rheumatoid arthritis (RA).

Methods: We conducted a meta-analysis of studies on the association between the TYMS 2R/3R and 6 bp I/D polymorphisms and non-responsiveness to or toxicity of MTX in RA patients.

Results: A total of 11 studies involving 1613 patients were considered. Meta-analysis showed no association between the TYMS 2R/3R 3R allele and non-responsiveness to MTX therapy (odds ratio [OR] = 1.087, confidence interval [CI] = 0.682-1.731, p = 0.726). The meta-analysis indicated that there was no association between the TYMS 6 bp I/D D allele and non-responsiveness to MTX therapy (OR = 0.688, 95% CI = 0.281-1.683, p = 0.413). Meta-analysis revealed that the TYMS 2R/3R polymorphism was not associated with MTX toxicity, except for in a co-dominant model, and the TYMS 6 bp I/D polymorphism was not associated with MTX toxicity in all genetic models.

Conclusions: This meta-analysis demonstrates that the TYMS 2R/3R and 6 bp I/D polymorphisms may not be associated with non-responsiveness to or toxicity of MTX therapy in RA patients.

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