Introduction: Satellite cells are muscle resident stem cells and are responsible for muscle regeneration. In this study we investigate the involvement of PKCε during muscle stem cell differentiation in vitro and in vivo. Here, we describe the identification of a previously unrecognized role for the PKCε – HMGA1 signaling axis in myoblast differentiation and regeneration processes. Methods: PKC expression was modulated in the C2C12 cell line and primary murine satellite cells in vitro, as well as in an in vivo model of muscle regeneration. Immunohistochemistry and immunofluorescence, RT-PCR and shRNA silencing techniques were used to determine the role of PKC and HMGA1 in myogenic differentiation. Results: PKC expression increases and subsequently re-localizes to the nucleus during skeletal muscle cell differentiation. In the nucleus, PKCε blocks Hmga1 expression to promote Myogenin and Mrf4 accumulation and myoblast formation. Following in vivo muscle injury, PKC accumulates in regenerating, centrally-nucleated myofibers. Pharmacological inhibition of PKC impairs the expression of two crucial markers of muscle differentiation, namely MyoD and Myogenin, during injury induced muscle regeneration. Conclusion: This work identifies the PKCε – HMGA1 signaling axis as a positive regulator of skeletal muscle differentiation.

PKCε as a novel promoter of skeletal muscle differentiation and regeneration / DI MARCANTONIO, Daniela; Galli, Daniela; Carubbi, Cecilia; Gobbi, Giuliana; Queirolo, Valeria; Martini, Silvia; Merighi, S.; Vaccarezza, M.; Maffulli, N.; Sykes, S. M.; Vitale, Marco; Mirandola, Prisco. - In: EXPERIMENTAL CELL RESEARCH. - ISSN 0014-4827. - 339:1(2015), pp. 10-19. [10.1016/j.yexcr.2015.09.017]

PKCε as a novel promoter of skeletal muscle differentiation and regeneration

VITALE, Marco;
2015-01-01

Abstract

Introduction: Satellite cells are muscle resident stem cells and are responsible for muscle regeneration. In this study we investigate the involvement of PKCε during muscle stem cell differentiation in vitro and in vivo. Here, we describe the identification of a previously unrecognized role for the PKCε – HMGA1 signaling axis in myoblast differentiation and regeneration processes. Methods: PKC expression was modulated in the C2C12 cell line and primary murine satellite cells in vitro, as well as in an in vivo model of muscle regeneration. Immunohistochemistry and immunofluorescence, RT-PCR and shRNA silencing techniques were used to determine the role of PKC and HMGA1 in myogenic differentiation. Results: PKC expression increases and subsequently re-localizes to the nucleus during skeletal muscle cell differentiation. In the nucleus, PKCε blocks Hmga1 expression to promote Myogenin and Mrf4 accumulation and myoblast formation. Following in vivo muscle injury, PKC accumulates in regenerating, centrally-nucleated myofibers. Pharmacological inhibition of PKC impairs the expression of two crucial markers of muscle differentiation, namely MyoD and Myogenin, during injury induced muscle regeneration. Conclusion: This work identifies the PKCε – HMGA1 signaling axis as a positive regulator of skeletal muscle differentiation.
2015
C2C12
HMGA1
PKCε
Satellite cells
Skeletal muscle differentiation
Cell Biology
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.11768/153993
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 16
  • ???jsp.display-item.citation.isi??? 14
social impact