Abstract
Germ cells differentiation of stem cells will aid treatment of adults with infertility. Biopolymers utilization provided synthetic extracellular matrix (ECM) and desired attributes in in vitro to improve conditions for stem cells attachment, proliferation and differentiation. Mixture of alginate as a biocompatible hydrogel, with collagen IV, could establish an in vitro 3 dimensional (3D) culture model. The objective of this study was investigation of the mouse ESCs differentiation capacity to putative primordial germ cells (PGCs) in the alginate and alginate-collagen IV microspheres (CAM). ESCs aggregated together to form embryoid bodies (EB) in CAM under basal medium supplemented with bone morphogenetic protein-4 (BMP4) as a differentiation factor. Viability and PGC differentiation of the stem cells in microspheres was evaluated by apoptosis and PGC related gene markers. Flow cytometry analysis was also used to detect of Mvh endogenous protein as a specific PGC marker. PGC gene and protein expression revealed that differentiation potential of ESCs to putative PGCs in CAM is significantly higher than control groups. Taking together, it was concluded that CAM demonstrated a great potential to use in PGCs differentiation and treatment of adults with infertility and may be a reliable means of producing mature germ cells.
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