2025
Enhanced trafficking of an inherited erythromelalgia NaV1.7 mutant channel at a physiological temperature
Mis M, Tyagi S, Akin E, Ghovanloo M, Zhao P, Dib-Hajj F, Randall A, Waxman S, Dib-Hajj S. Enhanced trafficking of an inherited erythromelalgia NaV1.7 mutant channel at a physiological temperature. Neurobiology Of Pain 2025, 18: 100188. DOI: 10.1016/j.ynpai.2025.100188.Peer-Reviewed Original ResearchMutant channelsIB4- neuronsInherited erythromelalgiaEnhanced traffickingActivity of Nav1.7Expressed sodium channelsHuman pain disordersCurrent-clamp recordingsDRG sensory neuronsVoltage-clamp recordingsAttacks of burning painGain-of-function mutationsIncreased membrane insertionHyperpolarizing shiftNeuronal hyperexcitabilityPain disordersCurrent-clampNav1.7 channelsWT channelsSensory neuronsSodium channelsIncreased firingTemporary reliefNeuronsSkin temperatureNav1.8, an analgesic target for nonpsychotomimetic phytocannabinoids
Ghovanloo M, Tyagi S, Zhao P, Waxman S. Nav1.8, an analgesic target for nonpsychotomimetic phytocannabinoids. Proceedings Of The National Academy Of Sciences Of The United States Of America 2025, 122: e2416886122. PMID: 39835903, PMCID: PMC11789019, DOI: 10.1073/pnas.2416886122.Peer-Reviewed Original ResearchConceptsExcitation of peripheral sensory neuronsTherapeutic potential of cannabinoidsPotential of cannabinoidsPeripheral sensory neuronsVoltage-gated sodiumSpectrum of adverse effectsNociceptor excitabilityPain signalsIn vivo studiesAnalgesic targetsPain treatmentAttenuate painRepetitive firingNav1.8Sensory neuronsTreatment optionsClinical studiesInhibit excitabilityAnalgesic compoundsPainTherapeutic potentialCannabigerolProof-of-principalAdverse effectsTreatment
2024
Compartment-specific regulation of NaV1.7 in sensory neurons after acute exposure to TNF-α
Tyagi S, Higerd-Rusli G, Ghovanloo M, Dib-Hajj F, Zhao P, Liu S, Kim D, Shim J, Park K, Waxman S, Choi J, Dib-Hajj S. Compartment-specific regulation of NaV1.7 in sensory neurons after acute exposure to TNF-α. Cell Reports 2024, 43: 113685. PMID: 38261513, PMCID: PMC10947185, DOI: 10.1016/j.celrep.2024.113685.Peer-Reviewed Original ResearchTNF-aSensory neuronsEffect of TNF-aSensory neuron excitabilityTumor necrosis factor-aRegulation of NaV1.7Voltage-gated sodiumPro-inflammatory cytokinesCompartment-specific effectsNeuronal plasma membraneSensitize nociceptorsNeuronal excitabilitySomatic membraneChannel N terminusElectrophysiological recordingsP38 MAPKIon channelsFactor AAcute exposureMolecular determinantsNeuronsAxonal endingsPhospho-acceptor sitesPlasma membraneCompartment-specific regulation
2023
Sodium currents in naĂŻve mouse dorsal root ganglion neurons: No major differences between sexes
Ghovanloo M, Tyagi S, Zhao P, Effraim P, Dib-Hajj S, Waxman S. Sodium currents in naĂŻve mouse dorsal root ganglion neurons: No major differences between sexes. Channels 2023, 18: 2289256. PMID: 38055732, PMCID: PMC10761158, DOI: 10.1080/19336950.2023.2289256.Peer-Reviewed Original ResearchConceptsSexual dimorphismRodent dorsal root ganglion neuronsBiophysical propertiesDorsal root ganglion neuronsExpression patternsSex-dependent regulationVoltage-gated sodiumFunctional analysisGanglion neuronsRodent sensory neuronsMouse dorsal root ganglion neuronsNaĂŻve WT miceNumber of cellsMixed populationDimorphismUniform experimental conditionsSex-dependent differencesSensory neuronsNative DRG neuronsPain pathwaysDRG neuronsWT miceClinical studiesNav currentsAdult malesPaclitaxel effects on axonal localization and vesicular trafficking of NaV1.8
Baker C, Tyagi S, Higerd-Rusli G, Liu S, Zhao P, Dib-Hajj F, Waxman S, Dib-Hajj S. Paclitaxel effects on axonal localization and vesicular trafficking of NaV1.8. Frontiers In Molecular Neuroscience 2023, 16: 1130123. PMID: 36860665, PMCID: PMC9970094, DOI: 10.3389/fnmol.2023.1130123.Peer-Reviewed Original ResearchChemotherapy-induced peripheral neuropathyDorsal root gangliaPTX treatmentDRG axonsEffect of paclitaxelVoltage-gated sodium channel NaPain syndromePeripheral neuropathyDRG neuronsSodium channel NaRoot gangliaCell cycle arrestNeuronal somataSensory neuronsSide effectsTherapeutic targetingTumor growthPaclitaxel effectAntineoplastic agentsAxonal localizationPaclitaxelNumber of NaAxonal compartmentAxonsChannel Na
2022
Depolarizing NaV and Hyperpolarizing KV Channels Are Co-Trafficked in Sensory Neurons
Higerd-Rusli GP, Alsaloum M, Tyagi S, Sarveswaran N, Estacion M, Akin EJ, Dib-Hajj FB, Liu S, Sosniak D, Zhao P, Dib-Hajj SD, Waxman SG. Depolarizing NaV and Hyperpolarizing KV Channels Are Co-Trafficked in Sensory Neurons. Journal Of Neuroscience 2022, 42: 4794-4811. PMID: 35589395, PMCID: PMC9188389, DOI: 10.1523/jneurosci.0058-22.2022.Peer-Reviewed Original ResearchIon channel traffickingMembrane proteinsChannel traffickingAxonal membrane proteinsTransport vesiclesPhysiological functionsSame vesiclesAxonal proteinsSpecific transport vesiclesIon channelsTrafficking of NaDiverse physiological functionsExcitability disordersDifferent physiological functionsDistinct ion channelsSensory neuron membraneSensory neuronsDistinct functional classesDistinct functional rolesNormal neuronal excitabilityTrafficking mechanismsNeuronal excitabilityPlasma membraneTherapeutic strategiesPrecise regulation
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