ArticleProceedings of the National Academy of Sciences of the United States of America2015
Arrhythmogenesis in a catecholaminergic polymorphic ventricular tachycardia mutation that depresses ryanodine receptor function.
Article in Proceedings of the National Academy of Sciences of the United States of America, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 70 papers, 1 of them a synthesis that pooled it.
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, 1 synthesis or guideline pooled it, 114 citations in OpenAlex.
- Diagnosis and management of very rare primary arrhythmia syndromes in children and adults: a Clinical Consensus Statement of the European Heart Rhythm Association of the ESC and the Association of Cardiovascular Nursing & Allied Professions of the ESC, endorsed by the Association for European Paediatric and Congenital Cardiology.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 · 2026Guideline
- Understanding CPVT pathogenic mechanisms based on mutation location within RyR2: towards personalized medicine?The Journal of physiology · 2026Article
- Ca2+ signalling in cardiac muscle: the importance of balances.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 · 2026Review
- Ryanodine receptor 2 mutations in catecholaminergic polymorphic ventricular tachycardia: From molecular mechanisms to precision medicine.World journal of cardiology · 2026Review
- Calcium release channel deficiency syndrome in patients diagnosed with idiopathic ventricular fibrillation and decedents classified as sudden unexplained death in the young.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 · 2026Article
- Loss-of-Function Mutation RyR2-A4860G Confers an Arrhythmia Phenotype in Mice Inconsistent With Calcium Release Deficiency Syndrome.Circulation. Arrhythmia and electrophysiology · 2026Article
- Calcium release deficiency syndrome: an emerging ryanodinopathy.Frontiers in molecular biosciences · 2026Review
- CPVT1 point mutations in RyR2 S5 and S6 segments and their CaCell calcium · 2025Article
- Compromised repolarization reserve in a murine model of catecholaminergic polymorphic ventricular tachycardia caused by RyR2-R420Q mutation.Journal of molecular and cellular cardiology · 2025Article
- Catecholaminergic polymorphic ventricular tachycardia: A narrative review of recent advances in genetics, mechanisms, diagnosis, and treatment.Asian heart journal · 2025Review
- A Comprehensive Review of a Mechanism-Based Ventricular Electrical Storm Management.Journal of clinical medicine · 2025Review
- Catecholaminergic Polymorphic Ventricular Tachycardia: Advancing From Molecular Insights to Preclinical Models.Journal of the American Heart Association · 2025Review
- Gain-of-Function and Loss-of-Function Mutations in the RyR2-Expressing Gene Are Responsible for the CPVT1-Related Arrhythmogenic Activities in the Heart.Current issues in molecular biology · 2024Article
- The Role of Human-Induced Pluripotent Stem Cells in Studying Cardiac Channelopathies.International journal of molecular sciences · 2024Review
- Dual ablation of the RyR2-Ser2808 and RyR2-Ser2814 sites increases propensity for pro-arrhythmic spontaneous CaThe Journal of physiology · 2024Article
- Mitochondrial Calcium Regulation of Cardiac Metabolism in Health and Disease.Physiology (Bethesda, Md.) · 2024Review
- An inherited life-threatening arrhythmia model established by screening randomly mutagenized mice.Proceedings of the National Academy of Sciences of the United States of America · 2024Article
- Can cardiomyocytes bypass the 'Ca2+-induced Ca2+-release' mechanism?Cardiovascular research · 2024Article
- Dissecting the roles of calcium cycling and its coupling with voltage in the genesis of early afterdepolarizations in cardiac myocyte models.PLoS computational biology · 2024Article
- p38γ/δ activation alters cardiac electrical activity and predisposes to ventricular arrhythmia.Nature cardiovascular research · 2023Article
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
8 authors at 2 institutions in 2 countries.
Funding
Abstract
Current mechanisms of arrhythmogenesis in catecholaminergic polymorphic ventricular tachycardia (CPVT) require spontaneous Ca(2+) release via cardiac ryanodine receptor (RyR2) channels affected by gain-of-function mutations. Hence, hyperactive RyR2 channels eager to release Ca(2+) on their own appear as essential components of this arrhythmogenic scheme. This mechanism, therefore, appears inadequate to explain lethal arrhythmias in patients harboring RyR2 channels destabilized by loss-of-function mutations. We aimed to elucidate arrhythmia mechanisms in a RyR2-linked CPVT mutation (RyR2-A4860G) that depresses channel activity. Recombinant RyR2-A4860G protein was expressed equally as wild type (WT) RyR2, but channel activity was dramatically inhibited, as inferred by [(3)H]ryanodine binding and single channel recordings. Mice heterozygous for the RyR2-A4860G mutation (RyR2-A4860G(+/-)) exhibited basal bradycardia but no cardiac structural alterations; in contrast, no homozygotes were detected at birth, suggesting a lethal phenotype. Sympathetic stimulation elicited malignant arrhythmias in RyR2-A4860G(+/-) hearts, recapitulating the phenotype originally described in a human patient with the same mutation. In isoproterenol-stimulated ventricular myocytes, the RyR2-A4860G mutation decreased the peak of Ca(2+) release during systole, gradually overloading the sarcoplasmic reticulum with Ca(2+). The resultant Ca(2+) overload then randomly caused bursts of prolonged Ca(2+) release, activating electrogenic Na(+)-Ca(2+) exchanger activity and triggering early afterdepolarizations. The RyR2-A4860G mutation reveals novel pathways by which RyR2 channels engage sarcolemmal currents to produce life-threatening arrhythmias.
Indexed as
Identifiers
What 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.