2020
Two independent mouse lines carrying the Nav1.7 I228M gain-of-function variant display dorsal root ganglion neuron hyperexcitability but a minimal pain phenotype
Chen L, Wimalasena NK, Shim J, Han C, Lee SI, Gonzalez-Cano R, Estacion M, Faber CG, Lauria G, Dib-Hajj S, Woolf CJ, Waxman SG. Two independent mouse lines carrying the Nav1.7 I228M gain-of-function variant display dorsal root ganglion neuron hyperexcitability but a minimal pain phenotype. Pain 2020, 162: 1758-1770. PMID: 33323889, PMCID: PMC8119301, DOI: 10.1097/j.pain.0000000000002171.Peer-Reviewed Original ResearchConceptsSmall fiber neuropathyDorsal root ganglion neuron hyperexcitabilityNeuron hyperexcitabilityMouse linesIdiopathic small fiber neuropathyIntraepidermal nerve fiber lossPainful small fiber neuropathyFunction variantsDRG neuron hyperexcitabilityNerve fiber lossSodium channel Nav1.7Multielectrode array recordingsNeuropathic painThermal hyperalgesiaDRG neuronsFiber lossPain disordersSensory dysfunctionNeuropathy phenotypePain phenotypesM miceSensory neuronsHyperexcitabilityChannel Nav1.7Independent mouse lines
2016
Familial gain-of-function Nav1.9 mutation in a painful channelopathy
Han C, Yang Y, Morsche R, Drenth JP, Politei JM, Waxman SG, Dib-Hajj SD. Familial gain-of-function Nav1.9 mutation in a painful channelopathy. Journal Of Neurology Neurosurgery & Psychiatry 2016, 88: 233. PMID: 27503742, DOI: 10.1136/jnnp-2016-313804.Peer-Reviewed Original ResearchConceptsPain disordersPainful small fiber neuropathyDorsal root ganglion neuronsSmall fiber neuropathyPotential therapeutic targetVoltage-clamp recordingsFunction mutationsPain symptomsGastrointestinal disturbancesGanglion neuronsClinical examinationHyperpolarising shiftFunctional assessmentTherapeutic targetDistal extremitiesPhenotypic spectrumElectrophysiological recordingsPatientsBlood relativesFirst arginine residuePainAcceleration of activationSegment 4ChannelopathiesDisorders