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Title: Inhibition of IL-1R1/MyD88 signalling promotes mesenchymal stem cell-driven tissue regeneration
Authors: Martino, Mikaël M.
Maruyama, Kenta
Kuhn, Gisela A.
Satoh, Takashi
Takeuchi, Osamu  kyouindb  KAKEN_id
Müller, Ralph
Akira, Shizuo
Author's alias: 竹内, 理
Keywords: Biological sciences
Cell biology
Medical research
Developmental biology
Issue Date: 22-Mar-2016
Publisher: Nature Publishing Group
Journal title: Nature Communications
Volume: 7
Thesis number: 11051
Abstract: Tissue injury and the healing response lead to the release of endogenous danger signals including Toll-like receptor (TLR) and interleukin-1 receptor, type 1 (IL-1R1) ligands, which modulate the immune microenvironment. Because TLRs and IL-1R1 have been shown to influence the repair process of various tissues, we explored their role during bone regeneration, seeking to design regenerative strategies integrating a control of their signalling. Here we show that IL-1R1/MyD88 signalling negatively regulates bone regeneration, in the mouse. Furthermore, IL-1β which is released at the bone injury site, inhibits the regenerative capacities of mesenchymal stem cells (MSCs). Mechanistically, IL-1R1/MyD88 signalling impairs MSC proliferation, migration and differentiation by inhibiting the Akt/GSK-3β/β-catenin pathway. Lastly, as a proof of concept, we engineer a MSC delivery system integrating inhibitors of IL-1R1/MyD88 signalling. Using this strategy, we considerably improve MSC-based bone regeneration in the mouse, demonstrating that this approach may be useful in regenerative medicine applications.
Rights: This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
URI: http://hdl.handle.net/2433/210219
DOI(Published Version): 10.1038/ncomms11051
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