Fig. 9From: Platelet-derived growth factor (PDGF)-AA/AB in human serum are potential indicators of the proliferative capacity of human synovial mesenchymal stem cellsEffect of pretreatment of platelet-derived growth factors (PDGFs) on calcification of synovial MSCs. a Representative culture dishes stained with alizarin red. Synovial MSCs were pretreated with PDGFs, and then calcified. b Relative optical density for alizarin red. Data are shown as mean ± SD (n = 6). PDGFR PDGF receptorBack to article page