FGFR3 effects on telomerase activity. Proliferative zone chondrocytes treated with siRNA to reduce FGFR3 and T3 to increase FGFR3 were compared to ScR controls. Data are presented as means ± SEM. An asterisk (*) designates that means for a given day differed from ScR control at p < 0.05. Untransfected chondrocyte cultures were not significantly different from ScR controls (data not shown).