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Evaluation of a novel poly(amidoamine) with pendant aminobutyl group on the cellular properties of transfected bone marrow mesenchymal stem cells.
Stem cell-based gene therapy has been considered in the treatment of many degenerative diseases. Gene-modified stem cells should maintain its reproductive activity without losing stem cell properties, including genetic phenotype and differentiation potential. In the study, a novel poly (amidoamine) with pendant aminobutyl group (PAA-BA) designed by our group was used in the transfection of bone marrow mesenchymal stromal cells (BMSCs) and the cellular properties post-transfection were evaluated, including DNA content, colony forming capacity, genetic phenotype, and multi-directional differentiation. Two classical non-viral gene delivery vectors, polyethylenimine (PEI) and Lipofectamine 2000 (LP2000) were also used. Compared to non-transfected group, PAA-BA showed minor decreased DNA content but maintained BMSCs' phenotype, reproductive activity and multi-differentiation potential (osteogenic, chondrogenic, adipogenic, and neurogenic differentiation). Both PAA-BA and PEI transfected BMSCs demonstrated improved osteogenic differentiation ability at late stage but suppressed adipogenic as well as mature neural differentiation in vitro. LP2000 and PEI transfected BMSCs displayed significantly lower DNA content and reproductive activity. These findings suggest that PAA-BA is one of safe gene delivery vectors in BMSCs transfection and plays a role in stem cell's osteogenic and neurogenic differentiation. This study proposes the potential application of PAA-BA in BMSCs based gene therapy, in particular bone and nerve relative diseases. © 2017 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 106A: 686-697, 2018.
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