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- W4320032775 abstract "Mesenchymal stem cell (MSC) chondrogenesis in three-dimensional (3D) culture involves dynamic changes in cytoskeleton architecture during mesenchymal condensation before morphogenesis. However, the mechanism linking dynamic mechanical properties of matrix to cytoskeletal changes during chondrogenesis remains unclear. Here, we investigated how viscoelasticity, a time-dependent mechanical property of collagen hydrogel, coordinates MSC cytoskeleton changes at different stages of chondrogenesis. The viscoelasticity of collagen hydrogel was modulated by controlling the gelling process without chemical cross-linking. In slower-relaxing hydrogels, although a disordered cortical actin promoted early chondrogenic differentiation, persistent myosin hyperactivation resulted in Rho-associated kinase (ROCK)-dependent apoptosis. Meanwhile, faster-relaxing hydrogels promoted cell-matrix interactions and eventually facilitated long-term chondrogenesis with mitigated myosin hyperactivation and cell apoptosis, similar to the effect of ROCK inhibitors. The current work not only reveals how matrix viscoelasticity coordinates MSC chondrogenesis and survival in a ROCK-dependent manner but also highlights viscoelasticity as a design parameter for biomaterials for chondrogenic 3D culture." @default.
- W4320032775 created "2023-02-12" @default.
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- W4320032775 date "2023-02-10" @default.
- W4320032775 modified "2023-09-25" @default.
- W4320032775 title "Collagen hydrogel viscoelasticity regulates MSC chondrogenesis in a ROCK-dependent manner" @default.
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- W4320032775 doi "https://doi.org/10.1126/sciadv.ade9497" @default.
- W4320032775 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/36763657" @default.
- W4320032775 hasPublicationYear "2023" @default.
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