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Due to pluripotency of embryonic stem (ES) cells, these cells are an invaluable in vitro model that investigates the influence of different physical and chemical cues on differentiation/development pathway of specialized cells. We sought the effect of roughness and alignment, as topomorpholocial properties of scaffolds on differentiation of green fluorescent protein-expressing ES (GFP-ES) cells into three germ layers derivates simultaneously. Furthermore, the effect of Matrigel as a natural extracellular matrix in combination with poly(lactic-co-glycolic acid) (PLGA) nanofibrous scaffolds on differentiation of mouse ES cells has been investigated. The PLGA nanofibrous scaffolds with different height and distribution of roughness and alignments were fabricated. Then, the different cell differentiation fats of GFP-ES cells plated on PLGA and PLGA/Matrigel scaffolds were analyzed by gene expression profiling. The findings demonstrated that distinct ranges of roughness, height, and distribution can support/promote a specific cell differentiation fate on scaffolds. Coating of scaffolds with Matrigel has a synergistic effect in differentiation of mesoderm-derived cells and germ cells from ES cells, whereas it inhibits the derivation of endodermal cell lineages. It was concluded that the topomorpholocial cues such as roughness and alignment should be considered in addition to other scaffolds properties to design an efficient electrospun scaffold for specific tissue engineering.

The Effect of Topography on Differentiation Fates of Matrigel-Coated Mouse Embryonic Stem Cells Cultured on PLGA Nanofibrous Scaffolds