Journal of clinical pharmacy and therapeutics · 2009
Genetic polymorphisms in folate pathway enzymes as a possible marker for predicting the outcome of methotrexate therapy in Japanese patients with rheumatoid arthritis.
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Hayashi H, Fujimaki C, Daimon T, Tsuboi S, Matsuyama T, Itoh K
Аннотация
BACKGROUND: Low-dose methotrexate (MTX) therapy is widely used in the treatment of rheumatoid arthritis (RA). Though the difference in response to MTX between patients with RA is large, the factors that contribute to this variability remain unclear.
OBJECTIVE: We aimed to identify those factors with a particular emphasis on the pharmacogenetics of MTX.
METHOD: We evaluated the association of possible factors, including genetic polymorphisms of folate metabolic pathway enzymes, with the cumulative value of C-reactive protein, an index of MTX anti-inflammatory efficacy, in 87 Japanese patients with RA.
RESULTS: Polymorphisms of the reduced folate carrier gene (RFC) G80A and of the gamma-glutamylhydrolase gene (GGH) C-401T were more closely associated (beta = 2.1194, P = 0.0017) than other polymorphisms, with the anti-inflammatory response to MTX.
CONCLUSION: Patients with RA having RFC 80A and GGH-401T alleles were less responsive to MTX than those with RFC 80A and without GGH-401T alleles. Thus, this data may be useful for guiding treatment of RA patients with MTX.
OBJECTIVE: We aimed to identify those factors with a particular emphasis on the pharmacogenetics of MTX.
METHOD: We evaluated the association of possible factors, including genetic polymorphisms of folate metabolic pathway enzymes, with the cumulative value of C-reactive protein, an index of MTX anti-inflammatory efficacy, in 87 Japanese patients with RA.
RESULTS: Polymorphisms of the reduced folate carrier gene (RFC) G80A and of the gamma-glutamylhydrolase gene (GGH) C-401T were more closely associated (beta = 2.1194, P = 0.0017) than other polymorphisms, with the anti-inflammatory response to MTX.
CONCLUSION: Patients with RA having RFC 80A and GGH-401T alleles were less responsive to MTX than those with RFC 80A and without GGH-401T alleles. Thus, this data may be useful for guiding treatment of RA patients with MTX.