Application of shear stress for enhanced osteogenic differentiation of mouse induced pluripotent stem cells

Phoonsuk Limraksasin, Praphawi Nattasit, Jeeranan Manokawinchoke, Watcharaphol Tiskratok, Naruephorn Vinaikosol, Hiroko Okawa, Chalida Nakalekha Limjeerajarus, Nuttapol Limjeerajarus, Prasit Pavasant, Thanaphum Osathanon, Hiroshi Egusa

Research output: Contribution to journalArticlepeer-review


The self-organizing potential of induced pluripotent stem cells (iPSCs) represents a promising tool for bone tissue engineering. Shear stress promotes the osteogenic differentiation of mesenchymal stem cells, leading us to hypothesize that specific shear stress could enhance the osteogenic differentiation of iPSCs. For osteogenesis, embryoid bodies were formed for two days and then maintained in medium supplemented with retinoic acid for three days, followed by adherent culture in osteogenic induction medium for one day. The cells were then subjected to shear loading (0.15, 0.5, or 1.5 Pa) for two days. Among different magnitudes tested, 0.5 Pa induced the highest levels of osteogenic gene expression and greatest mineral deposition, corresponding to upregulated connexin 43 (Cx43) and phosphorylated Erk1/2 expression. Erk1/2 inhibition during shear loading resulted in decreased osteogenic gene expression and the suppression of mineral deposition. These results suggest that shear stress (0.5 Pa) enhances the osteogenic differentiation of iPSCs, partly through Cx43 and Erk1/2 signaling. Our findings shed light on the application of shear-stress technology to improve iPSC-based tissue-engineered bone for regenerative bone therapy.

Original languageEnglish
Article number19021
JournalScientific reports
Issue number1
Publication statusPublished - 2022 Dec

ASJC Scopus subject areas

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