Fig. 1From: Methotrexate upregulates circadian transcriptional factors PAR bZIP to induce apoptosis on rheumatoid arthritis synovial fibroblastsCell viabilities of MTX-treated synovial fibroblasts. Cells treated with MTX (1, 10, and 100 nM, and 1 μM) or control media for 24–72 h. Cell viabilities of MTX-untreated cells defined as 1.0, and each value shown relative to control. Values are mean ± SEM. *p < 0.05 vs control, n = 5. MTX methotrexateBack to article page