CXCL10 expressions in rheumatoid arthritis (RA) synoviocytes (Western blot and reverse transcriptase-polymerase chain reaction). Human RA synoviocytes were cultured in the presence or absence of tumor necrosis factor-alpha (TNF-α) for 24 hours. Without TNF-α stimulation, low expressions of CXCL10 were observed in RA synoviocytes with high individual variation. However, with TNF-α stimulation, CXCL10 expression in RA synoviocytes was significantly increased. CXCL10, interferon-gamma-inducible protein 10; GAPDH, glyceraldehyde-3-phosphate dehydrogenase; RT-PCR, reverse transcriptase-polymerase chain reaction.