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Articles

Motor nerve regulates muscle extracellular matrix proteoglycan expression

R Fadic, E Brandan and NC Inestrosa
Journal of Neuroscience 1 November 1990, 10 (11) 3516-3523; DOI: https://doi.org/10.1523/JNEUROSCI.10-11-03516.1990
R Fadic
Department of Cell and Molecular Biology, Faculty of Biological Sciences, Catholic University of Chile, Santiago.
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E Brandan
Department of Cell and Molecular Biology, Faculty of Biological Sciences, Catholic University of Chile, Santiago.
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NC Inestrosa
Department of Cell and Molecular Biology, Faculty of Biological Sciences, Catholic University of Chile, Santiago.
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Abstract

Denervation of rat leg muscles caused a 2-3-fold increase in 35S- sulfate and 3H-glucosamine incorporation into proteoglycans of the muscle extracellular matrix. The size of the proteoglycans and the glycosaminoglycan chain length and degree of sulfation were unchanged. Because the rate of degradation of proteoglycans was also unchanged by denervation, we infer that denervation increases proteoglycan synthesis. Muscle reinnervation restored the original rate of synthesis of proteoglycans. Paralysis of innervated muscle caused increased incorporation of sulfate comparable to that seen in denervation. Thus motor nerve activity appears to regulate the level of proteoglycans in the muscle extracellular matrix.

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The Journal of Neuroscience: 10 (11)
Journal of Neuroscience
Vol. 10, Issue 11
1 Nov 1990
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Motor nerve regulates muscle extracellular matrix proteoglycan expression
R Fadic, E Brandan, NC Inestrosa
Journal of Neuroscience 1 November 1990, 10 (11) 3516-3523; DOI: 10.1523/JNEUROSCI.10-11-03516.1990

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Motor nerve regulates muscle extracellular matrix proteoglycan expression
R Fadic, E Brandan, NC Inestrosa
Journal of Neuroscience 1 November 1990, 10 (11) 3516-3523; DOI: 10.1523/JNEUROSCI.10-11-03516.1990
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