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Cell Growth & Differentiation, Vol 7, Issue 11 1461-1469, Copyright © 1996 by American Association of Cancer Research


ARTICLES

Evidence for implication of muscle-specific calpain (p94) in myofibrillar integrity

S Poussard, M Duvert, D Balcerzak, S Ramassamy, JJ Brustis, P Cottin and A Ducastaing
Laboratoire de Biochimie et Technologie des Aliments, Institut des Sciences et Techniques des Aliments de Bordeaux, Universite Bordeaux l et UA-INRA 429, Talence, France.

The expression and the putative function(s) of a specific muscle calcium-dependent protease were investigated during myogenesis using rat myoblast primary cultures as a model. We have shown that the levels of p94 mRNAs increase as a function of myoblast differentiation, with the greatest amount of these RNAs being present during the later stages (8th day after plating). After an antisense oligodeoxyribonucleotide treatment with p94, ultrastructural studies show dramatic perturbations in differentiated myotubes and during myofibrillogenesis, mainly involving myofibrillar stability and Z-line integrity. These results may be related to recent findings about the role of p94 gene mutations in limbgirdle muscular dystrophy type 2A.


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HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
Cancer Research Clinical Cancer Research
Cancer Epidemiology Biomarkers & Prevention Molecular Cancer Therapeutics
Molecular Cancer Research Cell Growth & Differentiation
Copyright © 1996 by the American Association of Cancer Research.