M-cadherin-mediated intercellular interactions activate satellite cell division

Merce Marti, Núria Montserrat, Cristina Pardo, Lola Mulero, Laia Miquel-Serra, Alexandre Miguel Cavaco Rodrigues, José Andrés Vaquero, Bernd Kuebler, Cristina Morera, María José Barrero, Juan Carlos Izpisua Belmonte*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

Adult muscle stem cells and their committed myogenic precursors, commonly referred to as the satellite cell population, are involved in both muscle growth after birth and regeneration after damage. It has been previously proposed that, under these circumstances, satellite cells first become activated, divide and differentiate, and only later fuse to the existing myofiber through M-cadherin-mediated intercellular interactions. Our data show that satellite cells fuse with the myofiber concomitantly to cell division, and only when the nuclei of the daughter cells are inside the myofiber, do they complete the process of differentiation. Here we demonstrate that Mcadherin plays an important role in cell-to-cell recognition and fusion, and is crucial for cell division activation. Treatment of satellite cells with M-cadherin in vitro stimulates cell division, whereas addition of anti-M-cadherin antibodies reduces the cell division rate. Our results suggest an alternative model for the contribution of satellite cells to muscle development, which might be useful in understanding muscle regeneration, as well as muscle-related dystrophies.

Original languageEnglish (US)
Pages (from-to)5116-5131
Number of pages16
JournalJournal of Cell Science
Volume126
Issue number22
DOIs
StatePublished - Nov 15 2013

Keywords

  • Cell division
  • Dystrophin
  • M-cadherin
  • Myogenesis
  • Satellite cells

ASJC Scopus subject areas

  • Cell Biology

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