Unique role of dystroglycan in peripheral nerve myelination, nodal structure, and sodium channel stabilization

Fumiaki Saito, Steven A. Moore, Rita Barresi, Michael D. Henry, Albee Messing, Susan E. Ross-Barta, Ronald D. Cohn, Roger A. Williamson, Kathleen A. Sluka, Diane L. Sherman, Peter J. Brophy, James D. Schmelzer, Phillip A. Low, Lawrence Wrabetz, M. Laura Feltri, Kevin P. Campbell

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Abstract

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.

Original languageEnglish (US)
Pages (from-to)747-758
Number of pages12
JournalNeuron
Volume38
Issue number5
DOIs
StatePublished - Jun 5 2003

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ASJC Scopus subject areas

  • Neuroscience(all)

Cite this

Saito, F., Moore, S. A., Barresi, R., Henry, M. D., Messing, A., Ross-Barta, S. E., Cohn, R. D., Williamson, R. A., Sluka, K. A., Sherman, D. L., Brophy, P. J., Schmelzer, J. D., Low, P. A., Wrabetz, L., Feltri, M. L., & Campbell, K. P. (2003). Unique role of dystroglycan in peripheral nerve myelination, nodal structure, and sodium channel stabilization. Neuron, 38(5), 747-758. https://doi.org/10.1016/S0896-6273(03)00301-5