The CXCR4/SDF1 axis improves muscle regeneration through MMP-10 activity

Stem Cells Dev. 2014 Jun 15;23(12):1417-27. doi: 10.1089/scd.2013.0491. Epub 2014 Mar 14.

Abstract

The CXCR4/SDF1 axis participates in various cellular processes, including cell migration, which is essential for skeletal muscle repair. Although increasing evidence has confirmed the role of CXCR4/SDF1 in embryonic muscle development, the function of this pathway during adult myogenesis remains to be fully elucidated. In addition, a role for CXCR4 signaling in muscle maintenance and repair has only recently emerged. Here, we have demonstrated that CXCR4 and stromal cell-derived factor-1 (SDF1) are up-regulated in injured muscle, suggesting their involvement in the repair process. In addition, we found that notexin-damaged muscles showed delayed muscle regeneration on treatment with CXCR4 agonist (AMD3100). Accordingly, small-interfering RNA-mediated silencing of SDF1 or CXCR4 in injured muscles impaired muscle regeneration, whereas the addition of SDF1 ligand accelerated repair. Furthermore, we identified that CXCR4/SDF1-regulated muscle repair was dependent on matrix metalloproteinase-10 (MMP-10) activity. Thus, our findings support a model in which MMP-10 activity modulates CXCR4/SDF1 signaling, which is essential for efficient skeletal muscle regeneration.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Benzylamines
  • Cell Movement / genetics
  • Cell Proliferation / drug effects
  • Cell Proliferation / genetics*
  • Chemokine CXCL12 / genetics
  • Chemokine CXCL12 / metabolism*
  • Cyclams
  • Elapid Venoms / toxicity
  • Heterocyclic Compounds / administration & dosage
  • Humans
  • Matrix Metalloproteinase 10 / genetics
  • Matrix Metalloproteinase 10 / metabolism*
  • Mice
  • Muscle Development / genetics
  • Muscle, Skeletal / drug effects
  • Muscle, Skeletal / growth & development
  • Muscle, Skeletal / injuries
  • Receptors, CXCR4 / agonists
  • Receptors, CXCR4 / metabolism*
  • Regeneration / drug effects*
  • Signal Transduction / genetics

Substances

  • Benzylamines
  • CXCR4 protein, mouse
  • Chemokine CXCL12
  • Cyclams
  • Elapid Venoms
  • Heterocyclic Compounds
  • Receptors, CXCR4
  • notexin
  • Matrix Metalloproteinase 10
  • plerixafor