Additional file 1.

A figure showing mRNA expression for multidrug resistance protein (MRP-1) and breast cancer resistance protein (BCRP). Synoviocytes from arthritic mice were cultured for 24 h with interleukin-6 (IL-6) (1, 10, 100 ng/mL) + soluble IL-6 receptor (sIL-6R) (100 ng/mL) or methotrexate (1, 10, 100 nM). After culturing, cell lysate was collected and mRNA expression for (A) MRP-1 and (B) BCRP was measured by real-time polymerase chain reaction. Each column and vertical line represents the mean and standard deviation of triplicate cultures. Statistical significance was analyzed by Dunnett's multiple comparison test or the unpaired t-test. GAPDH, glyceraldehyde-3-phosphate dehydrogenase.

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Hashizume et al. Arthritis Research & Therapy 2012 14:R96   doi:10.1186/ar3821