Figure 2.

Effects of triptolide and anti-rheumatic drugs on the proliferation of RSF. Cells were incubated with triptolide (closed diamond), bucillamine (closed triangle), methotrexate (closed circle), or D-penicillamine (open triangle) for 24 h. Then cell proliferation was estimated from the incorporation of BrdU and calculated as a percentage of the control value (untreated cells). Data are the mean ± S.D. for triplicate cultures and representative results from 7 independent experiments are shown.