altering the time of pma exposure demonstrated that pma inhibited chondrocyte phenotypic expression , rather than cell commitment : early ( 0-48 h ) exposure to pma ( during chondrocytic commitment in vitro ) had little inhibitory effect on the staining index , whereas , exposure from 49-96 h ( presumably post-commitment ) and 0-96 h had moderate and strong inhibitory effects , respectively , on cartilage synthesis .
C0225369
chondrocyte
C0007634
cell