Promoted osteogenic differentiation of human induced pluripotent stem cells using composited polycaprolactone/polyvinyl alcohol/carbopol nanofibrous scaffold

Brain inflammation is a key event triggering the pathological process associated with many neurodegenerative diseases. Current personalized medicine and translational research in neurodegenerative diseases focus on adipose-derived stem cells (ASCs), because they are patient-specific, thereby reducing the risk of immune rejection. ASCs have been shown to exert a therapeutic effect following transplantation in animal models of neuroinflammation. However, the mechanisms by which transplanted ASCs promote cell survival and/or functional recovery are not fully understood. We investigated the effects of ASCs in in vivo and in vitro lipopolysaccharide (LPS)-induced neuroinflammatory models. Brain damage was evaluated immunohistochemically using specific antibody markers of microglia, astroglia and oligodendrocytes. ASCs were used for intracerebral transplantation, as well as for non-contact co-culture with brain slices. In both in vivo and in vitro models, we found that LPS caused micro- and astroglial activation and oligodendrocyte degradation, whereas the presence of ASCs significantly reduced the damaging effects. It should be noted that the observed ASCs protection in a non-contact co-culture suggested that this effect was due to humoral factors via ASC-released biomodulatory molecules. However, further clinical studies are required to establish the therapeutic mechanisms of ASCs, and optimize their use as a part of a personalized medicine strategy.

Adipose-Derived Stem Cells Reduce Lipopolysaccharide-Induced Myelin Degradation and Neuroinflammatory Responses of Glial Cells in Mice.

Actual issues during tissue regeneration are to ensure the survival of transplanted cells at the site of their application and further activity, especially in case of local pathological alterations such as inflammation and ischemia. For this purpose, the matrices that can not only fill the defects of tissues, but also be scaffolds for cells are developed.The aim of this study was to evaluate the effectiveness of 3D cultivation of murine adipose-derived multipotent mesenchymal stromal cells (MSMCs) in hydrogel based on carbomer 974P.Materials and methods. MSMCs were obtained from the adipose tissue of FVB-Cg-Tg(GFPU)5Nagy/J mice transgenic for GFP gene. The cells were phenotyped by flow cytometry and directly differentiated into osteogenic and adipogenic direction to confirm multipotent phenotype. MMSCs were cultured and directly differentiated into osteogenic direction in three-dimensional hydrogel scaffolds. For hydrogel preparation we used carbomer 974P with composition of glycerol, propylene glycol, triethylamine and agarose in original proportion.Results. The three-dimensional hydrogel based on carbomer 974P for the further engraftment with MMSCs was obtained. Modified protocols for the preparation of hydrogels based on carbomer and agarose and their rehydration by culture media for the 3D cultivation of adipose-derived MMSCs have been developed. The optimal concentration of MSMCs and the injection method for engraftment of hydrogels of the required form and size are selected. It was shown that adipose-derived MMSCs in 3D carbomer hydrogel preserve the potential of directed osteogenic differentiation.Conclusion. Three-dimensional hydrogel based on carbomer 974P is capable to support cells, provide the necessary cytoarchitectonics, maintain intercellular interactions, which can promote further long-term survival and specialization of graft.

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3D culture of murine adipose-derived multipotent mesenchymal stromal cells in hydrogel based on carbomer 974P

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3D culture of murine adipose-derived multipotent mesenchymal stromal cells in hydrogel based on carbomer 974P