Ex vivo confocal microscopy analysis of BM
biomaterials. Not induced- mesenchymal stromal cells (ni-MSCs) or osteogenic induced-MSCs (i-MSCs) GFP+ loaded on BMA and BMF at high cell seeding density (200 × 103 cells per biomaterial) were embedded or not in PGCAP and grown for 21 days. Next, biomaterials were subcutaneously grafted on nude mice. Unloaded biomaterials (no pre-loaded cells and not embedded in PGCAP) were also grafted on mice. Twenty-eight days after grafting, biomaterials were cut in four pieces, fixed, and stained with CD90 antibody. Biomaterials were analyzed by confocal microscopy (blue: biomaterial; green: MSC GFP+; red: CD90APC; and purple: DAPI). Original magnification: ×20. Each picture is representative of three independent experiments. DAPI, 4'-6-diamidino-2-phenylindole; PGCAP, platelet glue obtained from cryoprecipitation of apheresis platelet products.