ArticleThe Journal of neuroscience : the official journal of the Society for Neuroscience2002
Potassium currents during the action potential of hippocampal CA3 neurons.
Article in The Journal of neuroscience : the official journal of the Society for Neuroscience, 2002. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 70 papers.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
70 citing papers in PubMed, 152 citations in OpenAlex.
- Review
- Age-related increase in the excitability of mouse layer V pyramidal neurons in the primary motor cortex is accompanied by an increased persistent inward current.GeroScience · 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
- Conotoxin KM-RIIIJ reveals interplay between KScientific reports · 2024Article
- Bidirectional dysregulation of synaptic glutamate signaling after transient metabolic failure.eLife · 2024Article
- Probing intracellular potassium dynamics in neurons with the genetically encoded sensor lc-LysM GEPII 1.0 in vitro and in vivo.Scientific reports · 2024Article
- Oxytocin Modifies the Excitability and the Action Potential Shape of the Hippocampal CA1 GABAergic Interneurons.International journal of molecular sciences · 2024Article
- Opto-electronic feedback control of membrane potential for real-time control of action potentials.Cell reports methods · 2023Article
- D-type K+ current rules the function of electrically coupled neurons in a species-specific fashion.The Journal of general physiology · 2023Article
- Different species, different gap junctions?The Journal of general physiology · 2023Article
- Comparative Effects of Domain-Specific Human Monoclonal Antibodies Against LGI1 on Neuronal Excitability.Neurology(R) neuroimmunology & neuroinflammation · 2023Article
- Involvement of GABAergic Interneuron Subtypes in 4-Aminopyridine-Induced Seizure-Like Events in Mouse Entorhinal CortexThe Journal of neuroscience : the official journal of the Society for Neuroscience · 2023Article
- GABACurrent research in neurobiology · 2023Article
- Electrophysiological basis of cardiac arrhythmia in a mouse model of myotonic dystrophy type 1.Frontiers in physiology · 2023Article
- Tuning the Sensitivity of Genetically Encoded Fluorescent Potassium Indicators through Structure-Guided and Genome Mining Strategies.ACS sensors · 2022Article
- Homeostatic regulation of extracellular signal-regulated kinase 1/2 activity and axonal KFrontiers in cellular neuroscience · 2022Article
- Short-Term Epileptiform Activity Potentiates Excitatory Synapses but Does Not Affect Intrinsic Membrane Properties of Pyramidal Neurons in the Rat Hippocampus In Vitro.Biomedicines · 2021Article
- TPEN attenuates amyloid-βMolecular brain · 2021Article
- Altered hippocampal gene expression, glial cell population, and neuronal excitability in aminopeptidase P1 deficiency.Scientific reports · 2021Article
- Mechanism of Manganese Dysregulation of Dopamine Neuronal Activity.The Journal of neuroscience : the official journal of the Society for Neuroscience · 2020Article
10 more citing papers are in PubMed but not listed here.
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
2 authors at 1 institution in 1 country.
Funding
Abstract
Central neurons have multiple types of voltage-dependent potassium channels, whose activation during action potentials shapes spike width and whose activation and inactivation at subthreshold voltages modulate firing frequency. We characterized the voltage-dependent potassium currents flowing during the action potentials of hippocampal CA3 pyramidal neurons and examined the susceptibility of the underlying channel types to inactivation at subthreshold voltages. Using acutely dissociated neurons that permitted rapid voltage clamp, action potentials recorded previously were used as the command voltage waveform, and individual components of potassium current were identified by pharmacological sensitivity. The overall voltage-dependent potassium current in the neurons could be split into three major components based on pharmacology and kinetics during step voltage pulses: I(D) (fast activating, slowly inactivating, and sensitive to 4-aminopyridine at 30 microm), I(A) (fast activating, fast inactivating, and sensitive to 4-aminopyridine at 3 mm), and I(K) (slowly activating, noninactivating, and sensitive to external TEA at 3-25 mm). The potassium current during the action potential was composed of approximately equal contributions of I(D) and I(A), with a negligible contribution of I(K). I(D) and I(A) had nearly identical trajectories of activation and deactivation during the action potential. Both I(A) and I(D) showed steady-state inactivation at subthreshold voltages, but maximal inactivation at such voltages was incomplete for both currents. Because of the major contribution of both I(D) and I(A) to spike repolarization, it is likely that modulation or partial inactivation at subthreshold voltages of either current can influence spike timing with minimal effect on spike width.
Indexed as
Identifiers
12451111PMC6758734W2120652370What OpenQuestion holds
Registered trials
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.