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© Research
Publication : Skeletal muscle

Dynamics of myogenic differentiation using a novel Myogenin knock-in reporter mouse.

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in Skeletal muscle - 18 Feb 2021

Benavente-Diaz M, Comai G, Di Girolamo D, Langa F, Tajbakhsh S,

Link to Pubmed [PMID] – 33602287

Link to DOI – 10.1186/s13395-021-00260-x

Skelet Muscle 2021 Feb; 11(1): 5

Myogenin is a transcription factor that is expressed during terminal myoblast differentiation in embryonic development and adult muscle regeneration. Investigation of this cell state transition has been hampered by the lack of a sensitive reporter to dynamically track cells during differentiation.Here, we report a knock-in mouse line expressing the tdTOMATO fluorescent protein from the endogenous Myogenin locus. Expression of tdTOMATO in MyogntdTom mice recapitulated endogenous Myogenin expression during embryonic muscle formation and adult regeneration and enabled the isolation of the MYOGENIN+ cell population. We also show that tdTOMATO fluorescence allows tracking of differentiating myoblasts in vitro and by intravital imaging in vivo. Lastly, we monitored by live imaging the cell division dynamics of differentiating myoblasts in vitro and showed that a fraction of the MYOGENIN+ population can undergo one round of cell division, albeit at a much lower frequency than MYOGENIN- myoblasts.We expect that this reporter mouse will be a valuable resource for researchers investigating skeletal muscle biology in developmental and adult contexts.

https://pubmed.ncbi.nlm.nih.gov/33602287