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pubmed-article:17219031pubmed:abstractTextAxonal degeneration is a major cause of permanent disability in multiple sclerosis (MS). Recent observations from our and other laboratories suggest that sodium accumulation within compromised axons is a key, early step in the degenerative process, and hence that limiting axonal sodium influx may represent a mechanism for axonal protection in MS. Here we assess whether lamotrigine, a sodium channel-blocking agent, is effective in preventing axonal degeneration in an animal model of MS, namely chronic-relapsing experimental autoimmune encephalomyelitis (CR-EAE). When administered from 7 days post-inoculation, lamotrigine provided a small but significant reduction in the neurological deficit present at the termination of the experiments (averaged over three independent experiments; vehicle: 3.5+/-2.7; lamotrigine: 2.6+/-2.0, P<0.05) and preserved more functional axons in the spinal cord (measured as mean compound action potential area; vehicle: 31.7 microV.ms+/-23.0; lamotrigine: 42.9+/-27.4, P<0.05). Histological examination of the thoracic spinal cord (n=71) revealed that lamotrigine treatment also provided significant protection against axonal degeneration (percentage degeneration in dorsal column; vehicle: 33.5 %+/-38.5; lamotrigine: 10.4 %+/-12.5, P<0.01). The findings suggest that lamotrigine may provide a novel avenue for axonal protection in MS.lld:pubmed
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pubmed-article:17219031pubmed:dateRevised2011-11-3lld:pubmed
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pubmed-article:17219031pubmed:year2006lld:pubmed
pubmed-article:17219031pubmed:articleTitleAxonal protection achieved in a model of multiple sclerosis using lamotrigine.lld:pubmed
pubmed-article:17219031pubmed:affiliationDepartment of Clinical Neuroscience, King's College London, Guy's Campus, National Hospital for Neurology and Neurosurgery, London, UK.lld:pubmed
pubmed-article:17219031pubmed:publicationTypeJournal Articlelld:pubmed
pubmed-article:17219031pubmed:publicationTypeResearch Support, Non-U.S. Gov'tlld:pubmed
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