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Title: Skeletal muscle stem cells express anti-apoptotic ErbB receptors during activation from quiescence

Abstract

To be effective for tissue repair, satellite cells (the stem cells of adult muscle) must survive the initial activation from quiescence. Using an in vitro model of satellite cell activation, we show that erbB1, erbB2 and erbB3, members of the EGF receptor tyrosine kinase family, appear on satellite cells within 6 h of activation. We show that signalling via erbB2 provides an anti-apoptotic survival mechanism for satellite cells during the first 24 h, as they progress to a proliferative state. Inhibition of erbB2 signalling with AG825 reduced satellite cell numbers, concomitant with elevated caspase-8 activation and TUNEL labelling of apoptotic satellite cells. In serum-free conditions, satellite cell apoptosis could be largely prevented by a mixture of erbB1, erbB3 and erbB4 ligand growth factors, but not by neuregulin alone (erbB3/erbB4 ligand). Furthermore, using inhibitors specific to discrete intracellular signalling pathways, we identify MEK as a pro-apoptotic mediator, and the erbB-regulated factor STAT3 as an anti-apoptotic mediator during satellite cell activation. These results implicate erbB2 signalling in the preservation of a full compliment of satellite cells as they activate in the context of a damaged muscle.

Authors:
 [1];  [2];  [2];  [2]
  1. Department of Biological Sciences, Open University, Walton Hall, Milton Keynes, MK7 6AA (United Kingdom). E-mail: j.p.golding@open.ac.uk
  2. Muscle Cell Biology Group, Medical Research Council Clinical Sciences Centre, Faculty of Medicine, Imperial College, Hammersmith Hospital Campus, Du Cane Road, London, W12 0NN (United Kingdom)
Publication Date:
OSTI Identifier:
20972106
Resource Type:
Journal Article
Resource Relation:
Journal Name: Experimental Cell Research; Journal Volume: 313; Journal Issue: 2; Other Information: DOI: 10.1016/j.yexcr.2006.10.019; PII: S0014-4827(06)00441-1; Copyright (c) 2006 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
60 APPLIED LIFE SCIENCES; APOPTOSIS; BIOLOGICAL REPAIR; GROWTH FACTORS; IN VITRO; LABELLING; LIGANDS; MUSCLES; RECEPTORS; SATELLITES; STEM CELLS; TYROSINE

Citation Formats

Golding, Jon P., Calderbank, Emma, Partridge, Terence A., and Beauchamp, Jonathan R.. Skeletal muscle stem cells express anti-apoptotic ErbB receptors during activation from quiescence. United States: N. p., 2007. Web. doi:10.1016/j.yexcr.2006.10.019.
Golding, Jon P., Calderbank, Emma, Partridge, Terence A., & Beauchamp, Jonathan R.. Skeletal muscle stem cells express anti-apoptotic ErbB receptors during activation from quiescence. United States. doi:10.1016/j.yexcr.2006.10.019.
Golding, Jon P., Calderbank, Emma, Partridge, Terence A., and Beauchamp, Jonathan R.. Mon . "Skeletal muscle stem cells express anti-apoptotic ErbB receptors during activation from quiescence". United States. doi:10.1016/j.yexcr.2006.10.019.
@article{osti_20972106,
title = {Skeletal muscle stem cells express anti-apoptotic ErbB receptors during activation from quiescence},
author = {Golding, Jon P. and Calderbank, Emma and Partridge, Terence A. and Beauchamp, Jonathan R.},
abstractNote = {To be effective for tissue repair, satellite cells (the stem cells of adult muscle) must survive the initial activation from quiescence. Using an in vitro model of satellite cell activation, we show that erbB1, erbB2 and erbB3, members of the EGF receptor tyrosine kinase family, appear on satellite cells within 6 h of activation. We show that signalling via erbB2 provides an anti-apoptotic survival mechanism for satellite cells during the first 24 h, as they progress to a proliferative state. Inhibition of erbB2 signalling with AG825 reduced satellite cell numbers, concomitant with elevated caspase-8 activation and TUNEL labelling of apoptotic satellite cells. In serum-free conditions, satellite cell apoptosis could be largely prevented by a mixture of erbB1, erbB3 and erbB4 ligand growth factors, but not by neuregulin alone (erbB3/erbB4 ligand). Furthermore, using inhibitors specific to discrete intracellular signalling pathways, we identify MEK as a pro-apoptotic mediator, and the erbB-regulated factor STAT3 as an anti-apoptotic mediator during satellite cell activation. These results implicate erbB2 signalling in the preservation of a full compliment of satellite cells as they activate in the context of a damaged muscle.},
doi = {10.1016/j.yexcr.2006.10.019},
journal = {Experimental Cell Research},
number = 2,
volume = 313,
place = {United States},
year = {Mon Jan 15 00:00:00 EST 2007},
month = {Mon Jan 15 00:00:00 EST 2007}
}
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