Differentially activated macrophages orchestrate myogenic precursor cell fate during human skeletal muscle regeneration. - Inserm - Institut national de la santé et de la recherche médicale Accéder directement au contenu
Article Dans Une Revue Stem Cells / Stem Cells (Miamisburg) Année : 2013

Differentially activated macrophages orchestrate myogenic precursor cell fate during human skeletal muscle regeneration.

Résumé

Macrophages (MPs) exert either beneficial or deleterious effects on tissue repair, depending on their activation/polarization state. They are crucial for adult skeletal muscle repair, notably by acting on myogenic precursor cells. However, these interactions have not been fully characterized. Here, we explored both in vitro and in vivo, in human, the interactions of differentially activated MPs with myogenic precursor cells (MPCs) during adult myogenesis and skeletal muscle regeneration. We showed in vitro that through the differential secretion of cytokines and growth factors, proinflammatory MPs inhibited MPC fusion while anti-inflammatory MPs strongly promoted MPC differentiation by increasing their commitment into differentiated myocytes and the formation of mature myotubes. Furthermore, the in vivo time course of expression of myogenic and MP markers was studied in regenerating human healthy muscle after damage. We observed that regenerating areas containing proliferating MPCs were preferentially associated with MPs expressing proinflammatory markers. In the same muscle, regenerating areas containing differentiating myogenin-positive MPCs were preferentially coupled to MPs harboring anti-inflammatory markers. These data demonstrate for the first time in human that MPs sequentially orchestrate adult myogenesis during regeneration of damaged skeletal muscle. These results support the emerging concept that inflammation, through MP activation, controls stem cell fate and coordinates tissue repair.
Fichier principal
Vignette du fichier
Saclier_Stem_cells_2012_HAL.pdf (1.59 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)
Loading...

Dates et versions

inserm-00787108 , version 1 (01-05-2013)

Identifiants

Citer

Marielle Saclier, Houda Yacoub-Youssef, Abigail Mackey, Ludovic Arnold, Hamida Ardjoune, et al.. Differentially activated macrophages orchestrate myogenic precursor cell fate during human skeletal muscle regeneration.. Stem Cells / Stem Cells (Miamisburg), 2013, 31 (2), pp.384-96. ⟨10.1002/stem.1288⟩. ⟨inserm-00787108⟩
312 Consultations
569 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More