Objective: To investigate the feasibility of inducing differentiation of the human amniotic mesenchymal cells (hAMCs) into osteoblasts in vitro, so as to provide the seed cells for bone tissue engineering.
Methods: The hAMCs were isolated from abandoned human amnion and cultured in osteogenic media to induce the osteogenic differentiation in vitro. After hAMCs were induced by osteogenic media for 15 days, morphological observation, immunocytochemistry and western blot were used to study the cellular morphology and expression of alkaline phosphatase (ALP), type I collagen, osteopontin and osteocalcin.
Results: The primary cultured hAMCs had long spindle shape or irregular shape, which were distributed evenly. The cells were usually suheultured in 5 or 7 days. After subculture, the cells became larger. After cultured by osteogenic media for 15 days, the hAMCs were detected to express ALP, osteocalcin and osteopontin, and secrete type I collagen.
Conclusions: The hAMCs are isolated, cultured and amplified easily in vitro. The induced differentiated cells by osteogenic media have typical osteoblast morphological and functional characteristics, which can be used as seed cells for bone tissue engineering.
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