Cited by 327Cardiac electrophysiology and arrhythmiasIon channel regulation and functionCardiovascular Effects of Exercise

Dantrolene rescues arrhythmogenic RYR2 defect in a patient‐specific stem cell model of catecholaminergic polymorphic ventricular tachycardia

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Jung, Christian B., Moretti, Alessandra, Mederos y Schnitzler, Michael, Iop, Laura, Storch, Ursula, Bellin, Milena, Dorn, Tatjana, Ruppenthal, Sandra +9 more·2012·EMBO Molecular Medicine

Abstract

Coordinated release of calcium (Ca(2+) ) from the sarcoplasmic reticulum (SR) through cardiac ryanodine receptor (RYR2) channels is essential for cardiomyocyte function. In catecholaminergic polymorphic ventricular tachycardia (CPVT), an inherited disease characterized by stress-induced ventricular arrhythmias in young patients with structurally normal hearts, autosomal dominant mutations in RYR2 or recessive mutations in calsequestrin lead to aberrant diastolic Ca(2+) release from the SR causing arrhythmogenic delayed after depolarizations (DADs). Here, we report the generation of induced pluripotent stem cells (iPSCs) from a CPVT patient carrying a novel RYR2 S406L mutation. In patient iPSC-derived cardiomyocytes, catecholaminergic stress led to elevated diastolic Ca(2+) concentrations, a reduced SR Ca(2+) content and an increased susceptibility to DADs and arrhythmia as compared to control myocytes. This was due to increased frequency and duration of elementary Ca(2+) release events (Ca(2+) sparks). Dantrolene, a drug effective on malignant hyperthermia, restored normal Ca(2+) spark properties and rescued the arrhythmogenic phenotype. This suggests defective inter-domain interactions within the RYR2 channel as the pathomechanism of the S406L mutation. Our work provides a new in vitro model to study the pathogenesis of human cardiac arrhythmias and develop novel therapies for CPVT.

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Authors
Jung, C. B., Moretti, A., Mederos y Schnitzler, M., Iop, L., Storch, U., Bellin, M., Dorn, T., Ruppenthal, S., Pfeiffer, S., Goedel, A., Dirschinger, R. J., Seyfarth, M., Lam, J. T., Sinnecker, D., Gudermann, T., Lipp, P., & Laugwitz, K.
Affiliations
  • TUM Klinikum (DE)
  • Walther-Straub-Institut für Pharmakologie und Toxikologie (DE)
  • Universitätsklinikum des Saarlandes (DE)
  • Witten/Herdecke University (DE)
Corresponding author
  • Gudermann, Thomas
  • Lipp, Peter
  • Laugwitz, Karl‐Ludwig
Venue
EMBO Molecular Medicine
Published
2012-01-25
Volume
4
Issue
3
Pages
180-191
ISSN
  • 1757-4676 (ISSN-L)
  • 1757-4684
OpenAlex
W2165179483
Cited by
327
References
45
Citations by year
2026: 1 · 2025: 9 · 2024: 9 · 2023: 10 · 2022: 4 · 2021: 30 · 2020: 17 · 2019: 17 · 2018: 32 · 2017: 32 · 2016: 37 · 2015: 41 · 2014: 27 · 2013: 36 · 2012: 25
FWCI
19.29
Type
journal article
Language
en
Open access
Locations
  • EMBO Molecular Medicine (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • mediaTUM (Technical University of Munich) (submittedVersion)
  • Padua Research Archive (University of Padova) (submittedVersion, cc-by)
Funders
  • European Research Council (Marie Curie Excellence Team (MEXT‐23208; ERC 261053–CHD‐iPS)
  • German Ministry for Education and Research (01 GN 0826)
  • National Research Fund, Luxembourg
Topics
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Cardiac electrophysiology and arrhythmias
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Ion channel regulation and function
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Cardiovascular Effects of Exercise
Keywords
catecholaminergic polymorphic ventricular tachycardia, RyR2, dantrolene, iPSC-derived cardiomyocytes, calcium sparks, diastolic calcium release, sarcoplasmic reticulum calcium, delayed afterdepolarizations, cardiac arrhythmias, malignant hyperthermia
MeSH terms
Polymorphic Catecholaminergic Ventricular Tachycardia, Adult, Calcium, Cells, Cultured, Dantrolene, Female, Humans, Models, Biological, Sarcoplasmic Reticulum, Ion Transport, Tachycardia, Ventricular, Ryanodine Receptor Calcium Release Channel, Myocytes, Cardiac, Induced Pluripotent Stem Cells

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