Dissemin is shutting down on January 1st, 2025

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American Society for Cell Biology, Molecular Biology of the Cell, 16(20), p. 3620-3627

DOI: 10.1091/mbc.e09-01-0012

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The Low-Affinity Receptor for Neurotrophins p75NTR Plays a Key Role for Satellite Cell Function in Muscle Repair Acting via RhoA

Journal article published in 2009 by Daniela Deponti, Roberta Buono, Giuseppina Catanzaro, Clara De Palma, Renato Longhi, Raffaella Meneveri, Nereo Bresolin, Maria Teresa Bassi, Giulio Cossu ORCID, Emilio Clementi, Silvia Brunelli
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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Abstract

Regeneration of muscle fibers, lost during pathological muscle degeneration or after injuries, is mediated by the production of new myofibres. This process, sustained by the resident stem cells of the muscle, the satellite cells, is finely regulated by local cues, in particular by cytokines and growth factors. Evidence in the literature suggests that nerve growth factor (NGF) is involved in muscle fiber regeneration; however, its role and mechanism of action were unclear. We have investigated this issue in in vivo mouse models of muscle regeneration and in primary myogenic cells. Our results demonstrate that NGF acts through its low-affinity receptor p75(NTR) in a developmentally regulated signaling pathway necessary to myogenic differentiation and muscle repair in vivo. We also demonstrate that this action of NGF is mediated by the down-regulation of RhoA-GTP signaling in myogenic cells.