Immunfluorescence staining of cultured human MSC. after 14 days of osteogenic stimulation. A-C: MSC were cultured for 14 days in osteoinduction medium containing dexamethasone, ascorbate and β-glycerophosphate. D – F: Cultures stimulated with osteoinduction medium and mechanical stimulation. Cultures stained with: A and D: anti-collagen I; B and E: anti-osteonectin; C and F: anti-CD90.