Glial regulation of the axonal membrane at nodes of Ranvier.

Abstract:

:Action potential conduction in myelinated nerve fibers depends on a polarized axonal membrane. Voltage-gated Na(+) and K(+) channels are clustered at nodes of Ranvier and mediate the transmembrane currents necessary for rapid saltatory conduction. Paranodal junctions flank nodes and function as attachment sites for myelin and as paracellular and membrane protein diffusion barriers. Common molecular mechanisms, directed by myelinating glia, are used to establish these axonal membrane domains. Initially, heterophilic interactions between glial and axonal cell adhesion molecules define the locations where nodes or paranodes form. Subsequently, within each domain, axonal cell adhesion molecules are stabilized and retained through interactions with cytoskeletal and scaffolding proteins, including ankyrins and spectrins.

journal_name

Curr Opin Neurobiol

authors

Schafer DP,Rasband MN

doi

10.1016/j.conb.2006.08.003

subject

Has Abstract

pub_date

2006-10-01 00:00:00

pages

508-14

issue

5

eissn

0959-4388

issn

1873-6882

pii

S0959-4388(06)00108-5

journal_volume

16

pub_type

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