Calpain 3 deficiency is associated with myonuclear apoptosis and profound perturbation of the IκBα/NF-κB pathway in limb-girdle muscular dystrophy type 2A
Using fluorescence microscopy techniques, we show here that muscle biopsies of LGMD2A patients present apoptotic features that are associated with subsarcolemmal localization of NF- Kappa B and selective nuclear accumulation of I Kappa B alpha . Furthermore, we reconstituted calpain 3-dependent degr...
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Published in | Nature medicine Vol. 5; no. 5; pp. 503 - 511 |
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Main Authors | , , , , , , , , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
New York
Nature Publishing Group US
01.05.1999
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Subjects | |
Online Access | Get full text |
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Summary: | Using fluorescence microscopy techniques, we show here that muscle biopsies of LGMD2A patients present apoptotic features that are associated with subsarcolemmal localization of NF- Kappa B and selective nuclear accumulation of I Kappa B alpha . Furthermore, we reconstituted calpain 3-dependent degradation of I Kappa B alpha in an in vitro cell expression system, and I Kappa B alpha -dependent apoptosis in human myogenic satellite cells grown in primary culture. Thus, the apoptotic cell death event in LGMD2A is compatible with a sequence of events involving a failure in calpain 3-dependent I Kappa B alpha proteolysis resulting in I Kappa B alpha accumulation in both the cytoplasm and nucleus, and sequestration of NF- Kappa B in the cytoplasm and subsequent non-expression of survival genes. |
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Bibliography: | ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23 |
ISSN: | 1078-8956 1546-170X |
DOI: | 10.1038/8385 |