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Single EDL Myofiber Isolation for Analyses of Quiescent and Activated Muscle Stem Cells

  • Caroline E. Brun
  • Yu Xin Wang
  • Michael A. RudnickiEmail author
Part of the Methods in Molecular Biology book series (MIMB, volume 1686)

Abstract

Adult satellite cells are quiescent, but are poised for activation in response to exercise, injury, or disease allowing adult muscle growth or repair. Once activated, satellite cells proliferate extensively to produce enough myogenic progenitors in order to regenerate the muscles. In order to self-renew, a subset of activated satellite cells can resist the myogenic differentiation and return to quiescence to replenish the satellite cell pool. These cellular processes that normally occur during skeletal muscle regeneration can be recapitulated ex vivo using isolated and cultured myofibers. Here, we describe a protocol to isolate single myofibers from the extensor digitorum longus muscle. Moreover, we detail experimental conditions for analyzing satellite cells in quiescence and progression through the myogenic lineage.

Key words

Skeletal muscle Extensor digitorum longus Satellite cells Muscle stem cells Myofiber isolation Quiescence Proliferation Differentiation Cell culture Immunostaining Pax7 Myod 

Notes

Acknowledgments

C.E.B. is supported by a Postdoctoral Fellowship from the Ontario Institute for Regenerative Medicine. Y.X.W. is supported by fellowships from the Queen Elizabeth II Graduate Scholarships in Science and Technology and the CIHR. M.A.R. holds a Canada Research Chair in Molecular Genetics. These studies were carried out with support of grants to M.A.R. from the US National Institutes for Health [R01AR044031], the Canadian Institutes for Health Research [MOP-12080, MOP-81288, FDN-148387], E-Rare-2: Canadian Institutes of Health Research/Muscular Dystrophy Canada [ERA-132935], the Muscular Dystrophy Association, and the Stem Cell Network.

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Copyright information

© Springer Science+Business Media LLC 2018

Authors and Affiliations

  • Caroline E. Brun
    • 1
  • Yu Xin Wang
    • 1
  • Michael A. Rudnicki
    • 1
    Email author
  1. 1.Regenerative Medicine Program, Department of Cellular and Molecular Medicine, Faculty of Medicine, Sprott Center for Stem Cell Research, Ottawa Hospital Research InstituteUniversity of OttawaOttawaCanada

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