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• W3134788761 abstract "Extracellular matrix (ECM) remodeling is necessary for the development and self-healing of tissue, and the process is tissue specific. Matrix metalloproteinases (MMPs) play a role in ECM remodeling by unwinding and cleaving ECM. We hypothesized that ECM remodeling by MMPs is involved in the differentiation of stem cells into specific lineages during self-healing. To prove the hypothesis, we investigated which MMPs are involved in the osteogenic differentiation of human mesenchymal stem cells (hMSCs) grown on a type I collagen (Col I) matrix, and we found that specifically high expression of MMP13 in hMSCs grown on a Col I matirx during osteogenic differentiation. Moreover, knocking down of MMP13 decreased the osteogenic differentiation of hMSCs grown on a Col I matrix. In addition, pre-treatment of recombinant human MMP13 lead to remodeling of Col I matrix and increased the osteogenic differentiation of hMSCs and in vivo bone formation following the upregulation of the expression of runt-related transcription factor 2 (RUNX2), integrin α3 (ITGA3), and focal adhesion kinase. Furthermore, the transcription factor RUNX2 bound to the MMP13 promoter. These results suggest that growth on a remodeled Col I matrix by MMP13 stimulates osteogenic differentiation of hMSCs and self-healing of bone tissue via an MMP13/ITGA3/RUNX2 positive feedback loop. STATEMENT OF SIGNIFICANCE: Self-healing of tissue could be the key to treating diseases that cannot be overcome by present technology. We investigated the mechanism underlying the self-healing of tissue and we found that the osteogenic differentiation was increased in hMSCs grown on a remodeled Col I matrix by the optimized concentration of MMP13 not in hMSCs grown on a Col I fragments cleaved by a high concentration of MMP13. In addition, we found the remodeled Col I matrix by MMP13 increased the osteogenic capacity through a MMP13/integrin α3/RUNX2 positive feedback loop. This result would be able to not only provide a strategy for bone tissue-specific functional materials following strong evidence about the self-healing mechanism of bone through the interaction between stem cells and the ECM matrix. As such, we strongly believe our finding will be of interest to researchers studying biomaterials, stem cell biology and matrix interaction for regenerative medicine and therapy." @default.
• W3134788761 created "2021-03-15" @default.
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• W3134788761 date "2021-04-01" @default.
• W3134788761 modified "2023-10-17" @default.
• W3134788761 title "Cryptic ligand on collagen matrix unveiled by MMP13 accelerates bone tissue regeneration via MMP13/Integrin α3/RUNX2 feedback loop" @default.
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• W3134788761 doi "https://doi.org/10.1016/j.actbio.2021.02.042" @default.
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