Abstract
Conditions for culturing and differentiation of human umbilical blood mononuclear cells in vitro were studied. The growth of mesenchymal stem cells was attained in 31 of 54 (57.4%) umbilical blood samples and morphological and immunophenotypical authenticity of these cells was confirmed. Stimulatory effects of 20% AB(IV) human serum and transforming growth factor-beta (TGF-beta) on the growth of mesenchymal stem cells were demonstrated. Osteogenic cells formed in the presence of differentiation factors ascorbic acid, dexamethasone, and beta-glycerophosphate, while chondrogenic cells developed in the presence of dexamethasone, ascorbic acid, and TGF-beta. Differentiation of mesenchymal stem cells was confirmed by histochemical and molecular genetic tests.
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