Figure 3. Induction of cartilage matrix expression by ADSC. ADSC (A) and CF (B) were cultured as pellets (2×10⁵) in chondrocyte differentiation medium for three weeks. The pellets were fixed, imbedded in OCT, cut into 8 µm thick sections and stained with toluidine blue to detect proteoglycan staining typical of cartilage. Scale bar indicates 50 μm.