{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,26]],"date-time":"2026-10-26T04:38:18Z","timestamp":1792989498485,"version":"4.5.0"},"reference-count":58,"publisher":"SAGE Publications","issue":"1","license":[{"start":{"date-parts":[[2001,2,1]],"date-time":"2001-02-01T00:00:00Z","timestamp":980985600000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.sagepub.com\/page\/policies\/text-and-data-mining-license"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Neuroscientist"],"published-print":{"date-parts":[[2001,2]]},"abstract":"<jats:p>Voltage-gated sodium channels are glycoprotein complexes responsible for initiation and propagation of action potentials in excitable cells such as central and peripheral neurons, cardiac and skeletal muscle myocytes, and neuroendocrine cells. Mammalian sodium channels are heterotrimers, composed of a central, pore-forming \u03b1 subunit and two auxiliary \u03b2 subunits. The \u03b1 subunits form a gene family with at least 10 members. Mutations in \u03b1 subunit genes have been linked to paroxysmal disorders such as epilepsy, long QT syndrome, and hyperkalemic periodic paralysis in humans, and motor endplate disease and cerebellar ataxia in mice. Three genes encode sodium channel \u03b2 subunits with at least one alternative splice product. A mutation in the \u03b21 subunit gene has been linked to generalized epilepsy with febrile seizures plus type 1 (GEFS + 1) in a human family with this disease. Sodium channel \u03b2 subunits are multifunctional. They modulate channel gating and regulate the level of channel expression at the plasma membrane. More recently, they have been shown to function as cell adhesion molecules in terms of interaction with extracellular matrix, regulation of cell migration, cellular aggregation, and interaction with the cytoskeleton. Structure-function studies have resulted in the preliminary assignment of functional domains in the \u03b21 subunit. A sodium channel signaling complex is proposed that involves \u03b2 subunits as channel modulators as well as cell adhesion molecules, other cell adhesion molecules such as neurofascin and contactin, RPTP\u03b2, and extracellular matrix molecules such as tenascin.<\/jats:p>","DOI":"10.1177\/107385840100700108","type":"journal-article","created":{"date-parts":[[2009,4,17]],"date-time":"2009-04-17T18:53:06Z","timestamp":1239994386000},"page":"42-54","source":"Crossref","is-referenced-by-count":301,"title":["Sodium Channel \u03b2 Subunits: Anything but Auxiliary"],"prefix":"10.1177","volume":"7","author":[{"given":"Lori L.","family":"Isom","sequence":"first","affiliation":[{"name":"Department of Pharmacology, The University of Michigan, Ann 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