Differentiation potential of MSCs from equine BM, AT and UC. Differentiation of MSCs from BM (A, D, G, J), AT (B, E, H, K) and UC (C, F, I, L) into three mesenchymal lineages during the third passage. (A-C) MSCs showing intracytoplasmic lipid droplets confirming the adipogenic lineage. (D-F) MSCs stained with Alizarin Red showing matrix calcium formation. (G-L) MSCs after chondrogenic differentiation stained with Alcian Blue (G-I) and toluidine blue (J-L) showing hyaline matrix. 100x (D-L), 200x (B) and 400x (A, C) magnification. AT, adipose tissue; BM, bone marrow; MSCs, mesenchymal stem cells; UC, umbilical cord.