COL1A1 and sarcoma: Then, we analyzed the expression of biomarkers of osteoblasts (COL1A1, BGLAP and RUNX2), chondrocytes (COL2A1, COMP and SOX9) and sarcoma (POSTN and DCN), adipocyte (LPL and PPARG) and BMSCs (Fig. 1E; Figure S2B, C).