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Tissue damage induces a conserved stress response that initiates quiescent muscle stem cell activation

Abstract : Tissue damage dramatically alters how cells interact with their microenvironment. These changes in turn dictate cellular responses, such as stem cell activation, yet early cellular responses in vivo remain ill defined. We generated single-cell and nucleus atlases from intact, dissociated, and injured muscle and liver and identified a common stress response signature shared by multiple cell types across these organs. This prevalent stress response was detected in published datasets across a range of tissues, demonstrating high conservation but also a significant degree of data distortion in single-cell reference atlases. Using quiescent muscle stem cells as a paradigm of cell activation following injury, we captured early cell activation following muscle injury and found that an essential ERK1/2 primary proliferation signal precedes initiation of the Notch-regulated myogenic program. This study defines initial events in response to tissue perturbation and identifies a broadly conserved transcriptional stress response that acts in parallel with cell-specific adaptive alterations.
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Contributor : Hugo Varet Connect in order to contact the contributor
Submitted on : Wednesday, November 3, 2021 - 9:26:07 AM
Last modification on : Wednesday, December 1, 2021 - 4:40:02 PM

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Léo Machado, Perla Geara, Jordi Camps, Matthieu dos Santos, Fatima Teixeira-Clerc, et al.. Tissue damage induces a conserved stress response that initiates quiescent muscle stem cell activation. Cell Stem Cell, Cambridge, MA : Cell Press, 2021, ⟨10.1016/j.stem.2021.01.017⟩. ⟨pasteur-03151438⟩



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