Heparan sulfates and the decrease of N-glycans promote early adipogenic differentiation rather than myogenesis of murine myogenic progenitor cells
2017
Grassot, Vincent | Bouchatal, Amel | da Silva, Anne | Chantepie, Sandrine | Papy-Garcia, Dulce | Maftah, Abderrahman | Gallet, Paul-François | Petit, Jean-Michel | Unité de Génétique Moléculaire Animale (UMR GMA) ; Université de Limoges (UNILIM)-Institut National de la Recherche Agronomique (INRA) | EAC 7149 ; Centre National de la Recherche Scientifique (CNRS) | Croissance cellulaire, réparation et régénération tissulaires (CRRET) ; Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Centre National de la Recherche Scientifique (CNRS) | Region Limousin, University of Limoges, INRA
In vitro, extracted muscle satellite cells, called myogenic progenitor cells, can differentiate either in myotubes or preadipocytes, depending on environmental factors and the medium. Transcriptomic analyses on glycosylation genes during satellite cells differentiation into myotubes showed that 31 genes present a significant variation of expression at the early stages of murine myogenic progenitor cells (MPC) differentiation. In the present study, we analyzed the expression of 383 glycosylation related genes during murine MPC differentiation into preadipocytes and compared the data to those previously obtained during their differentiation into myotubes. Fifty-six glycosylation related genes are specifically modified in their expression during early adipogenesis. The variations correspond mainly to: a decrease of N-glycans, and of alpha (2,3) and (2,6) linked sialic acids, and to a high level of heparan sulfates. A high amount of TGF-beta 1 in extracellular media during early adipogenesis was also observed. It seems that the increases of heparan sulfates and TGF-beta 1 favor pre-adipogenic differentition of MPC and possibly prevent their myogenic differentiation.
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