Kazuhiko Kumagai

Polymorphisms in the thymidylate synthase and methylenetetrahydrofolate reductase genes and sensitivity to the low-dose methotrexate therapy in patients with rheumatoid arthritis

Kazuhiko Kumagai, Keiko Hiyama, Tetsu Oyama et al. · International Journal of Molecular Medicine · 2003 · 165 citations

Genetic Epidemiology, Immunology, Thymidylate Synthase +16

Allelotype frequency of the thiopurine methyltransferase (TPMT) gene in Japanese

Kazuhiko Kumagai, Keiko Hiyama, Shinichi Ishioka et al. · Pharmacogenetics · 2001 · 107 citations

Epigenetic Change, Genetics, Genetic Epidemiology +20

Thiopurine Methyltransferase Genotype and the Toxicity of Azathioprine in Japanese.

Shinichi Ishioka, Keiko Hiyama, Hiroe Sato et al. · Internal Medicine · 1999 · 54 citations · Full text

Lymphocyte transformation test is not helpful for the diagnosis of methotrexate-induced pneumonitis in patients with rheumatoid arthritis

Shintaro Hirata, Noboru Hattori, Kazuhiko Kumagai et al. · Clinica Chimica Acta · 2009 · 18 citations

Inflammation, Rheumatology, Rheumatoid Disorder +10

Grade 3 Lymphomatoid Granulomatosis in a Patient Receiving Methotrexate Therapy for Rheumatoid Arthritis

Hiroshi Oiwa, Keichiro Mihara, Takanobu Kan et al. · Internal Medicine · 2014 · 17 citations · Full text

Rheumatoid Disorder, Rheumatology, Lymphoid Neoplasia +15