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Modulation of the stemness and osteogenic differentiation of human mesenchymal stem cells by controlling RGD concentrations of poly(carboxybetaine) hydrogel
Author(s) -
Chien HsiuWen,
Fu SzuWei,
Shih AiYun,
Tsai WeiBor
Publication year - 2014
Publication title -
biotechnology journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.144
H-Index - 84
eISSN - 1860-7314
pISSN - 1860-6768
DOI - 10.1002/biot.201300433
Subject(s) - mesenchymal stem cell , microbiology and biotechnology , chemistry , regenerative medicine , cellular differentiation , stem cell , tissue engineering , in vitro , cell , biophysics , biomedical engineering , biochemistry , biology , medicine , gene
In vitro modulation of the differentiation status of mesenchymal stem cells (MSCs) is important for their application to regenerative medicine. We suggested that the morphology and differentiation states of MSCs could be modulated by controlling the cell affinity of a substrate. The objective of this study was to investigate the effects of surface bio‐adhesive signals on self‐renewal and osteogenic differentiation of MSCs using a low‐fouling platform. Cell‐resistant poly(carboxybetaine) hydrogel was conjugated with 5 μM or 5 mM of cell‐adhesive arginine‐glycine‐aspartic acid (RGD) peptides in order to control the cells' affinity to the substrate. Human mesenchymal stem cells (hMSCs) were cultured on the RGD‐modified poly(carboxybetaine) hydrogel and then the cells' states of stemness and osteogenic differentiation were evaluated using reverse‐transcriptase polymerase chain reaction. The hMSCs formed three‐dimensional spheroids on the 5 μM RGD substrate, while cells on the 5 mM RGD substrate exhibited spreading morphology. Furthermore, cells on the 5 μM RGD hydrogel maintained a better stemness phenotype, while the hMSCs on the 5 mM RGD hydrogel proliferated faster and underwent osteogenic differentiation. In conclusion, the stemness of hMSCs was best maintained on a low RGD surface, while osteogenic differentiation of hMSCs was enhanced on a high RGD surface.