The DOI matches its Crossref record; 90 of the 91 references it cites were found in a registry or an index.
Apamin-Sensitive Small Conductance Calcium-Activated Potassium Channels, through their Selective Coupling to Voltage-Gated Calcium Channels, Are Critical Determinants of the Precision, Pace, and Pattern of Action Potential Generation in Rat Subthalamic Nucleus Neurons In Vitro
Open accessAbstract
Distinct activity patterns in subthalamic nucleus (STN) neurons are observed during normal voluntary movement and abnormal movement in Parkinson's disease (PD). To determine how such patterns of activity are regulated by small conductance (SK) calcium-activated potassium channels (K Ca ) and voltage-gated calcium (Ca v ) channels, STN neurons were recorded in the perforated patch configuration in slices, [which were prepared from postnatal day 16 (P16)-P30 rats and held at 37°C] and then treated with the SK K Ca channel antagonist apamin or the SK K Ca agonist 1-ethyl-2-benzimidazolinone or the Ca v channel antagonists ω-conotoxin GVIA (Ca v 2.2-selective) or nifedipine (Ca v 1.2-1.3-selective). In other experiments, fura-2 was introduced as an indicator of intracellular calcium dynamics. A component of the current underlying single-spike afterhyperpolarization was sensitive to apamin, phase-locked to calcium entry via Ca v 2.2 channels, and necessary for precise, autonomous, single-spike oscillation. SK K Ca /Ca v 2.2 channel coupling did not underlie spike-frequency adaptation but limited activity in response to current injection by encoding the accumulation of intracellular calcium, maintained the characteristic sigmoidal frequency-intensity relationship and generated a post-train afterhyperpolarization. In addition, SK K Ca channels terminated rebound burst activity more effectively in neurons with short-duration bursts (<100 msec) than neurons with long-duration bursts (>100 msec), presumably through their activation by Ca v 3 channels. Ca v 1.2-1.3 channels were not strongly coupled to SK K Ca channels and therefore supported secondary range and long-duration rebound burst firing. In summary, SK K Ca channels play a fundamental role in autonomous, driven, and rebound activity and oppose the transition from autonomous, rhythmic, single-spike activity to burst firing in STN neurons.
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“This could constitute an inhibitory driving force for spontaneous neuronal activity as AHP amplitude is reversely correlated with the firing frequency [83–85].”
From Chronic unpredictable stress induces depression-related behaviors by suppressing AgRP neuron activity (2021) · cites this paper as [84]
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Modulation and Robustness of Endogenous Neuronal SpikingPreprint
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Metadata
- Authors
- Hallworth, N. E., Wilson, C. J., & Bevan, M. D.
- Affiliations
- Northwestern University (US)
- Venue
- The Journal of Neuroscience
- Publisher
- Society for Neuroscience
- Published
- 2003-08-20
- Volume
- 23
- Issue
- 20
- Pages
- 7525-7542
- ISSN
- 0270-6474 (ISSN-L)
- 1529-2401
- PMC
- PMC6740770
- OpenAlex
- W1823433896
- Cited by
- 210
- References
- 91
- Citations by year
- 2026: 3 · 2025: 3 · 2024: 8 · 2023: 6 · 2022: 4 · 2021: 5 · 2020: 5 · 2019: 7 · 2018: 13 · 2017: 4 · 2016: 7 · 2015: 8 · 2014: 10 · 2013: 6 · 2012: 15
- FWCI
- 4.83
- Type
- journal article
- Language
- en
- Open access
- green
- www.ncbi.nlm.nih.gov
- Locations
- Journal of Neuroscience (publishedVersion)
- Europe PMC (PubMed Central) (publishedVersion)
- PubMed Central (publishedVersion)
- PubMed (publishedVersion)
- Funders
- National Institute of Neurological Disorders and Stroke (NS-41280, R01NS020702, NS-20702, NS26473, R37NS041280, NS047085, P50NS047085, R01NS041280)
- Topics
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Ion channel regulation and function
- Health Sciences › Medicine › Clinical Neurology › Deep Brain Stimulation and Movement Disorders
- Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Cardiac electrophysiology and arrhythmias
- Keywords
- small conductance calcium-activated potassium channels, apamin, voltage-gated calcium channels, N-type calcium channels, Cav3 channels, channel coupling, action potential generation, afterhyperpolarization, intracellular calcium dynamics, Parkinson's disease, neuronal firing patterns
- MeSH terms
- Action Potentials, Animals, Apamin, Calcium, Calcium Channel Blockers, Cells, Cultured, Kinetics, Neurons, Periodicity, Calcium Channels, Potassium Channels, Ion Transport, Rats, Sprague-Dawley, Patch-Clamp Techniques, Subthalamic Nucleus, Calcium Channels, L-Type, Potassium Channels, Calcium-Activated, Potassium Channel Blockers, Rats, Small-Conductance Calcium-Activated Potassium Channels
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