ArticleJournal of interventional cardiac electrophysiology : an international journal of arrhythmias and pacing2015
A peptidomimetic inhibitor suppresses the inducibility of β1-adrenergic autoantibody-mediated cardiac arrhythmias in the rabbit.
Article in Journal of interventional cardiac electrophysiology : an international journal of arrhythmias and pacing, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers.
What it found
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Who cites it
7 citing papers in PubMed, 12 citations in OpenAlex.
- Article
- Article
- Electroimmunology and cardiac arrhythmia.Nature reviews. Cardiology · 2021Review
- Elevated β1-Adrenergic Receptor Autoantibody Levels Increase Atrial Fibrillation Susceptibility by Promoting Atrial Fibrosis.Frontiers in physiology · 2020Article
- Adrenergic Autoantibody-Induced Postural Tachycardia Syndrome in Rabbits.Journal of the American Heart Association · 2019Article
- Cyclic peptide RD808 reduces myocardial injury induced by βHeart and vessels · 2019Article
- Article
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Authors and funding
9 authors at 1 institution in 1 country.
Funding
Abstract
purposePrevious studies demonstrated that burst pacing and subthreshold infusion of acetylcholine in β1-adrenergic receptor (β1AR)-immunized rabbits induced sustained sinus tachycardia. The aim of this study was to examine the anti-arrhythmogenic effect of a newly designed retro-inverso (RI) peptidomimetic inhibitor that specifically targets the β1AR antibodies in the rabbit.
methodsSix New Zealand white rabbits were immunized with a β1AR second extracellular loop peptide to produce sympathomimetic β1AR antibodies. A catheter-based electrophysiological study was performed on anesthetized rabbits before and after immunization and subsequent treatment with the RI peptide inhibitor. Each rabbit served as its own control.
resultsNo sustained arrhythmias were induced at preimmune baseline. At 6 weeks after immunization, there was a marked increase in induced sustained tachyarrhythmias, predominantly sinus tachycardia, which was largely suppressed by the RI peptide. The atrial effective refractory period was shortened significantly in immunized rabbits compared to their preimmune state. The RI peptide reversed and prolonged this shortening. β1AR antibody levels were negatively correlated with the atrial effective refractory period. Postimmune sera-induced β1AR activation in transfected cells in vitro was also blocked by the RI peptide.
conclusionsβ1AR-activating autoantibodies are associated with reduction of the atrial effective refractory period and facilitate arrhythmia induction in this model. The RI peptide reversal may have important therapeutic implications in subjects who harbor these autoantibodies.
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