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Disruption of the beta-sarcoglycan gene reveals pathogenetic complexity of limb-girdle muscular dystrophy type 2E.

Authors: Durbeej, M  Cohn, R D  Hrstka, R F  Moore, S A  Allamand, V  Davidson, B L  Williamson, R A  Campbell, K P 
Citation: Durbeej M, etal., Mol Cell. 2000 Jan;5(1):141-51.
Pubmed: (View Article at PubMed) PMID:10678176

Limb-girdle muscular dystrophy type 2E (LGMD 2E) is caused by mutations in the beta-sarcoglycan gene, which is expressed in skeletal, cardiac, and smooth muscle. beta-sarcoglycan-deficient (Sgcb-null) mice developed severe muscular dystrophy and cardiomyopathy with focal areas of necrosis. The sarcoglycan-sarcospan and dystroglycan complexes were disrupted in skeletal, cardiac, and smooth muscle membranes. epsilon-sarcoglycan was also reduced in membrane preparations of striated and smooth muscle. Loss of the sarcoglycan-sarcospan complex in vascular smooth muscle resulted in vascular irregularities in heart, diaphragm, and kidneys. Further biochemical characterization suggested the presence of a distinct epsilon-sarcoglycan complex in skeletal muscle that was disrupted in Sgcb-null mice. Thus, perturbation of vascular function together with disruption of the epsilon-sarcoglycan-containing complex represents a novel mechanism in the pathogenesis of LGMD 2E.

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RGD ID: 13605614
Created: 2018-06-11
Species: All species
Last Modified: 2018-06-11
Status: ACTIVE



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