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Simulated microgravity using a rotary cell culture system promotes chondrogenesis of human adipose-derived mesenchymal stem cells via the p38 MAPK pathway

Simulated microgravity using a rotary cell culture system promotes chondrogenesis of human adipose-derived mesenchymal stem cells via the p38 MAPK pathway

Biochemical and Biophysical Research Communications 414(2): 412-418

Mesenchymal stem cells (MSCs) are multi-potent, and the chondrogenesis of MSCs is affected by mechanical stimulation. The aim of this study was to investigate, using a rotary cell culture system (RCCS) bioreactor, the effects of microgravity on the chondrogenic differentiation of human adipose-derived MSCs (ADSCs), which were cultured in pellets with or without the chondrogenic growth factor TGF-β1. In addition, we evaluated the role of the p38 MAPK pathway in this process. The real-time PCR and histological results show that microgravity has a synergistic effect on chondrogenesis with TGF-β1. The p38 MAPK pathway was activated by TGF-β1 alone and was further stimulated by microgravity. Inhibition of p38 activity with SB203580 suppressed chondrocyte-specific gene expression and matrix production. These findings suggest that the p38 MAPK signal acts as an essential mediator in the microgravity-induced chondrogenesis of ADSCs.

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Accession: 036221052

Download citation: RISBibTeXText

PMID: 21971552

DOI: 10.1016/j.bbrc.2011.09.103

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