Voltage-gatedK+channelsareimportantdeterminantsofneuronalmembraneexcitABIlity.Moreover,differencesinK+channelexpressionpatternsanddensitiescontributetothevariationsinactionpotentialwaveformsandrepetitivefiringpatternsevidentindifferentneuronalcelltypes(Maletic-Savaticetal.,1995;Pongs,1999;BlaineandRibera,1998;BurgerandRibera,1996).Kv7.2/KCNQK+channelsassociatewithKv7.3/KCNQ3K+channlestoformapotassiumchannelwithessentiallyidenticalpropertiestothechannelunderlyingthenativeM-current,aslowlyactivatinganddeactivatingpotassiumconductancewhichplaysacriticalroleindeterminingthesubthresholdelectricalexcitabilityofneuronsaswellastheresponsivenesstosynapticinputs.
Images:Kv7.2(dilution1:100)stainingofratskinslicedinto40μmcryo-sections(red)andcounterstainedwithNF-H(green)doi:10.3389/fnmol.2012.00063.
Defectsin Kv7.2arethecauseofbenignfamilialneonatalseizurestype1(BFNS1). Itisalsoexpressedintheperipheralterminalsofnociceptiveprimaryafferents.
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