2008
Targeted deletion of kcne2 impairs ventricular repolarization via disruption of IK,slow1 and Ito,f
Roepke TK, Kontogeorgis A, Ovanez C, Xu X, Young JB, Purtell K, Goldstein PA, Christini DJ, Peters NS, Akar FG, Gutstein DE, Lerner DJ, Abbott GW. Targeted deletion of kcne2 impairs ventricular repolarization via disruption of IK,slow1 and Ito,f. The FASEB Journal 2008, 22: 3648-3660. PMID: 18603586, PMCID: PMC2537427, DOI: 10.1096/fj.08-110171.Peer-Reviewed Original ResearchConceptsAlpha subunitKv4 alpha subunitsAction potential durationVentricular action potential durationFunctional promiscuityVentricular membrane fractionsLong QT syndromeVentricular repolarizationAncillary subunitsWild typeNovel roleMembrane fractionKcne2 deletionKv1.5 proteinTargeted deletionSubunitsKcne2 disruptionMiRP1Cardiac roleProteinKCNE2DeletionKv1.5Sevoflurane anesthesiaDisruption
2003
Phenotypic differences in transient outward K+ current of human and canine ventricular myocytes: insights into molecular composition of ventricular Ito
Akar FG, Wu RC, Deschenes I, Armoundas AA, Piacentino V, Houser SR, Tomaselli GF. Phenotypic differences in transient outward K+ current of human and canine ventricular myocytes: insights into molecular composition of ventricular Ito. AJP Heart And Circulatory Physiology 2003, 286: h602-h609. PMID: 14527940, DOI: 10.1152/ajpheart.00673.2003.Peer-Reviewed Original ResearchConceptsTransient outwardPhenotypic differencesKv channel-interacting proteinsIndependent transient outwardChannel-interacting proteinsProtein chemical techniquesSteady-state inactivationCanine ventricular myocytesWestern blot analysisElectrical remodelingChannel subunit genesMonoexponential time coursePharmacological sensitivityVentricular repolarizationCardiac diseaseElectrophysiological roleCanine ventricularHuman cardiac diseasePosttranslational modificationsVentricular myocytesSubunit genePharmacological propertiesDiseased heartPhenotypic propertiesOxidative stress
1998
Modulated Dispersion Explains Changes in Arrhythmia Vulnerability During Premature Stimulation of the Heart
Laurita K, Girouard S, Akar F, Rosenbaum D. Modulated Dispersion Explains Changes in Arrhythmia Vulnerability During Premature Stimulation of the Heart. Circulation 1998, 98: 2774-2780. PMID: 9851966, DOI: 10.1161/01.cir.98.24.2774.Peer-Reviewed Original ResearchConceptsVentricular fibrillation thresholdSingle premature stimulusPremature stimuliArrhythmia vulnerabilityBaseline levelsPremature stimulationS1S2 intervalRepolarization gradientsGuinea pig heartsBaseline pacingFibrillation thresholdArrhythmogenic substrateVentricular fibrillationVentricular sitesStimulus-induced changesVentricular repolarizationCoupling intervalCardiac arrhythmiasS2 beatElectrophysiological propertiesAction potentialsOptical action potentialsHeterogeneous electrophysiological propertiesPig heartsRepolarization