loss of myod and myf5 in skeletal muscle stem cells results in altered myogenic programming and failed regeneration

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ID: 157261
2018
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Abstract
Summary: MyoD and Myf5 are fundamental regulators of skeletal muscle lineage determination in the embryo, and their expression is induced in satellite cells following muscle injury. MyoD and Myf5 are also expressed by satellite cell precursors developmentally, although the relative contribution of historical and injury-induced expression to satellite cell function is unknown. We show that satellite cells lacking both MyoD and Myf5 (double knockout [dKO]) are maintained with aging in uninjured muscle. However, injured muscle fails to regenerate and dKO satellite cell progeny accumulate in damaged muscle but do not undergo muscle differentiation. dKO satellite cell progeny continue to express markers of myoblast identity, although their myogenic programming is labile, as demonstrated by dramatic morphological changes and increased propensity for non-myogenic differentiation. These data demonstrate an absolute requirement for either MyoD or Myf5 in muscle regeneration and indicate that their expression after injury stabilizes myogenic identity and confers the capacity for muscle differentiation. : In this article, Goldhamer and colleagues show that loss of both MyoD and Myf5 in skeletal muscle satellite cells results in regenerative failure following injury. Satellite cell progeny accumulate in injured muscle and continue to express markers of myoblast identity, but do not undergo muscle differentiation, and exhibit a propensity for non-myogenic differentiation. Keywords: skeletal muscle regeneration, muscle stem cell programming, muscle differentiation, satellite cell, MyoD, Myf5, adipogenesis, fibrosis, conditional knockout, Cre/loxP
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yamamoto2018stemloss Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors ;Masakazu Yamamoto;Nicholas P. Legendre;Arpita A. Biswas;Alexander Lawton;Shoko Yamamoto;Shahragim Tajbakhsh;Gabrielle Kardon;David J. Goldhamer
Journal nature reviews gastroenterology & hepatology
Year 2018
DOI
DOI not found
URL
http://www.sciencedirect.com/science/article/pii/S2213671118300535
Keywords
medicine (general)biology (general)

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