ArticleThe Journal of neuroscience : the official journal of the Society for Neuroscience2003
Kv3 potassium conductance is necessary and kinetically optimized for high-frequency action potential generation in hippocampal interneurons.
Article in The Journal of neuroscience : the official journal of the Society for Neuroscience, 2003. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 138 papers.
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138 citing papers in PubMed.
- Impacts of Kv3.1 Channels on Action Potentials in Fusiform Neurons From the Dorsal Cochlear Nucleus of Mice Before and After Hearing Onset.Journal of the Association for Research in Otolaryngology : JARO · 2026Article
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- Prefrontal cortex interneurons and their contributions to attention, working memory, and adaptive behavior.Progress in neurobiology · 2026Review
- Article
- A neuron type-specific microexon in Ank3/ankyrin-G modulates calcium activity and neuronal excitability.Nature communications · 2026Article
- A silent Kv channel subunit shapes PV neuron action potential waveform and short-term synaptic plasticity during high-frequency firing.Proceedings of the National Academy of Sciences of the United States of America · 2026Article
- A silent Kv channel subunit shapes PV neuron action potential waveform and short-term synaptic plasticity during high-frequency firing.bioRxiv : the preprint server for biology · 2025Article
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- Gene expression correlates and mechanistic insights into electric organ discharge duration changes in mormyrid electric fish.The Journal of experimental biology · 2025Article
- Downmodulation of Potassium Conductances Induces Epileptic Seizures in Cortical Network Models Via Multiple Synergistic Factors.The Journal of neuroscience : the official journal of the Society for Neuroscience · 2025Article
- The impact of dynamic reversal potential on the evolution of action potential attributes during spike trains.Frontiers in computational neuroscience · 2025Article
- Multimodal Interrogation of Ventral Pallidum Projections Reveals Projection-Specific Signatures and Effects on Cocaine Reward.The Journal of neuroscience : the official journal of the Society for Neuroscience · 2024Article
- Targeted therapy improves cellular dysfunction, ataxia, and seizure susceptibility in a model of a progressive myoclonus epilepsy.Cell reports. Medicine · 2024Article
- A structurally precise mechanism links an epilepsy-associatedProceedings of the National Academy of Sciences of the United States of America · 2024Article
- Spiral ganglion neuron degeneration in aminoglycoside-deafened rats involves innate and adaptive immune responses not requiring complement.Frontiers in molecular neuroscience · 2024Article
- Case Report: Targeted treatment by fluoxetine/norfluoxetine of aFrontiers in pharmacology · 2024Article
- Physiological features of parvalbumin-expressing GABAergic interneurons contributing to high-frequency oscillations in the cerebral cortex.Current research in neurobiology · 2024Review
- Machine learning reveals common transcriptomic signatures across rat brain and placenta following developmental organophosphate ester exposure.Toxicological sciences : an official journal of the Society of Toxicology · 2023Article
78 more citing papers are in PubMed but not listed here.
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Abstract
Kv3 channels are thought to be essential for the fast-spiking (FS) phenotype in GABAergic interneurons, but how these channels confer the ability to generate action potentials (APs) at high frequency is unknown. To address this question, we developed a fast dynamic-clamp system (approximately 50 kHz) that allowed us to add a Kv3 model conductance to CA1 oriens alveus (OA) interneurons in hippocampal slices. Selective pharmacological block of Kv3 channels by 0.3 mm 4-aminopyridine or 1 mm tetraethylammonium ions led to a marked broadening of APs during trains of short stimuli and a reduction in AP frequency during 1 sec stimuli. The addition of artificial Kv3 conductance restored the original AP pattern. Subtraction of Kv3 conductance by dynamic clamp mimicked the effects of the blockers. Application of artificial Kv3 conductance also led to FS in OA interneurons after complete K+ channel block and even induced FS in hippocampal pyramidal neurons in the absence of blockers. Adding artificial Kv3 conductance with altered deactivation kinetics revealed a nonmonotonic relationship between mean AP frequency and deactivation rate, with a maximum slightly above the original value. Insertion of artificial Kv3 conductance with either lowered activation threshold or inactivation also led to a reduction in the mean AP frequency. However, the mechanisms were distinct. Shifting the activation threshold induced adaptation, whereas adding inactivation caused frequency-dependent AP broadening. In conclusion, Kv3 channels are necessary for the FS phenotype of OA interneurons, and several of their gating properties appear to be optimized for high-frequency repetitive activity.
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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.