Journal
NEURON
Volume 38, Issue 5, Pages 747-758Publisher
CELL PRESS
DOI: 10.1016/S0896-6273(03)00301-5
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Funding
- NIAMS NIH HHS [K02 AR-02201] Funding Source: Medline
- NINDS NIH HHS [NS-41319, NS-41407, R01 NS045630-09, R01 NS045630-03, R01 NS045630, R01 NS045630-01, NS-45630, R01 NS045630-02] Funding Source: Medline
- Telethon [1177] Funding Source: Medline
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Dystroglycan is a central component of the dystrophin-glycoprotein complex implicated in the pathogenesis of several neuromuscular diseases. Although dystroglycan is expressed by Schwann cells, its normal peripheral nerve functions are unknown. Here we show that selective deletion of Schwann cell dystroglycan results in slowed nerve conduction and nodal changes including reduced sodium channel density and disorganized microvilli. Additional features of mutant mice include deficits in rotorod performance, aberrant pain responses, and abnormal myelin sheath folding. These data indicate that dystroglycan is crucial for both myelination and nodal architecture. Dystroglycan may be required for the normal maintenance of voltage-gated sodium channels at nodes of Ranvier, possibly by mediating trans interactions between Schwann cell microvilli and the nodal axolemma.
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