ArticleCardiovascular research2007
Early electrical remodeling in rabbit pulmonary vein results from trafficking of intracellular SK2 channels to membrane sites.
Article in Cardiovascular research, 2007. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 81 papers, 2 of them syntheses that pooled it.
What it found
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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.
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Who cites it
81 citing papers in PubMed, 2 syntheses or guidelines pooled it, 156 citations in OpenAlex.
- 2017 HRS/EHRA/ECAS/APHRS/SOLAECE expert consensus statement on catheter and surgical ablation of atrial fibrillation.Europace : European pacing, arrhythmias, and cardiac electrophysiology : journal of the working groups on cardiac pacing, arrhythmias, and cardiac cellular electrophysiology of the European Society of Cardiology · 2018Guideline
- Guideline
- Computational modelling of the pro- and antiarrhythmic effects of atrial high rate-dependent trafficking of small-conductance calcium-activated potassium channels.The Journal of physiology · 2026Article
- Activation of Small Conductance CaInternational journal of molecular sciences · 2025Article
- Large-scale single-nuclei profiling identifies role for ATRNL1 in atrial fibrillation.Nature communications · 2024Article
- Challenges in the Therapeutic Targeting of KCa Channels: From Basic Physiology to Clinical Applications.International journal of molecular sciences · 2024Review
- hiPSC-derived cardiomyocytes as a model to study the role of small-conductance CaFrontiers in cell and developmental biology · 2024Review
- From Atrial Small-conductance Calcium-activated Potassium Channels to New Antiarrhythmics.European cardiology · 2024Review
- Up-regulated small-conductance calcium-activated potassium currents contribute to atrial arrhythmogenesis in high-fat feeding mice.Europace : European pacing, arrhythmias, and cardiac electrophysiology : journal of the working groups on cardiac pacing, arrhythmias, and cardiac cellular electrophysiology of the European Society of Cardiology · 2023Article
- Dual effects of the small-conductance CaAmerican journal of physiology. Heart and circulatory physiology · 2023Article
- Towards Improved HumanBiomedicines · 2023Review
- In silico analysis of the dynamic regulation of cardiac electrophysiology by KThe Journal of physiology · 2023Article
- Small-conductance calcium-activated potassium channels in the heart: expression, regulation and pathological implications.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2023Review
- Enhanced CaCirculation research · 2023Article
- Emerging Antiarrhythmic Drugs for Atrial Fibrillation.International journal of molecular sciences · 2022Review
- Exploring the Coordination of Cardiac Ion Channels With Action Potential Clamp Technique.Frontiers in physiology · 2022Review
- Downregulation of ICCs and PDGFRα+ cells on colonic dysmotility in hirschsprung disease.Frontiers in pediatrics · 2022Article
- Differential regulation of KPhysiological reports · 2021Article
- Cardiac small-conductance calcium-activated potassium channels in health and disease.Pflugers Archiv : European journal of physiology · 2021Review
- The regulation of the small-conductance calcium-activated potassium current and the mechanisms of sex dimorphism in J wave syndrome.Pflugers Archiv : European journal of physiology · 2021Review
21 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
8 authors at 1 institution in 1 country.
Funding
Abstract
objectiveAtrial fibrillation is often initiated by bursts of ectopic activity arising in the pulmonary veins. We have previously shown that a 3-h intermittent burst pacing protocol (BPP), mimicking ectopic pulmonary vein foci, shortens action potential duration (APD) locally at the pulmonary vein-atrial interface (PV) while having no effect elsewhere in rabbit atrium. This shortening is Ca(2+) dependent and is prevented by apamin, which blocks small conductance Ca(2+)-activated K(+) channels (SK(Ca)). The present study investigates the ionic and molecular mechanisms whereby two apamin-sensitive SK(Ca) channels, SK2 and SK3, might contribute to the regional APD changes.
methodsMicroelectrode and patch clamp techniques were used to record APDs and apamin-sensitive currents in isolated rabbit left atria and cells dispersed from PV and Bachmann's bundle (BB) regions. SK2 and SK3 mRNA and protein levels were quantified, and immunofluorescence was used to observe channel protein distribution.
resultsThere was a direct relationship between APD shortening and apamin-sensitive current in burst-paced but not sham-paced PV. Moreover, apamin-sensitive current density increased in PV but not BB after BPP. SK2 mRNA, protein, and current were increased in PV after BPP, while SK2 immunostaining shifted from a perinuclear pattern in sham atria to predominance at sites near or at the PV membrane.
conclusionsBPP-induced acceleration of repolarization in PV results from SK2 channel trafficking to the membrane, leading to increased apamin-sensitive outward current. This is the first indication of involvement of Ca(2+)-activated K(+) currents in atrial remodeling and provides a possible basis for evolution of an arrhythmogenic substrate.
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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.