Associations between gene polymorphisms and treatment outcomes of methotrexate in patients with juvenile idiopathic arthritis
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Updated: Feb 12, 2026

A Method to Study the C924T Polymorphism of the Thromboxane A2 Receptor Gene
Published on: April 1, 2019
Yuehong Chen1, Kun Zou2, Jianhong Sun1
1Department of Rheumatology & Immunology, West China Hospital, Sichuan University, Chengdu, PR China.
Aim:
Performance of a meta-analysis with respect to the genetic predictors of methotrexate (MTX) treatment outcomes, efficacy and toxicity, in patients with juvenile idiopathic arthritis (JIA).
Methods:
Databases of OVID MEDLINE and OVID EMBASE were searched to collect the studies addressing correlations between gene polymorphisms and efficacy and/or toxicity in MTX-treated JIA patients. Pooled odds ratios (ORs) with 95% CIs were estimated in allelic, recessive and/or dominant models.
Results:
With regards to efficacy, the C677T (rs1801133) polymorphism in MTHFR was associated with nonresponse to MTX treatment in a recessive model (OR: 0.40; 95% CI: 0.19-0.84). For associations with toxicity, the MTHFR C677T (rs1801133) polymorphism was associated with presenting overall adverse events in an allelic model (OR: 1.54; 95% CI: 1.07-2.22) and a dominant model (OR: 1.70; 95% CI: 1.08-2.68).
Conclusion:
C677T (rs1801133) polymorphism in MTHFR predicts nonresponse and/or adverse effects of MTX treatment in JIA patients.
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