Insights Into the Pathogenesis of Catecholaminergic Polymorphic Ventricular Tachycardia From Engineered Human Heart Tissue

BACKGROUND: Modeling of human arrhythmias with induced pluripotent stem cell-derived cardiomyocytes has focused on single-cell phenotypes. However, arrhythmias are the emergent properties of cells assembled into tissues, and the impact of inherited arrhythmia mutations on tissue-level properties of human heart tissue has not been reported.

METHODS: Here, we report an optogenetically based, human engineered tissue model of catecholaminergic polymorphic ventricular tachycardia (CPVT), an inherited arrhythmia caused by mutation of the cardiac ryanodine channel and triggered by exercise. We developed a human induced pluripotent stem cell-derived cardiomyocyte-based platform to study the tissue-level properties of engineered human myocardium. We investigated pathogenic mechanisms in CPVT by combining this novel platform with genome editing.

RESULTS: In our model, CPVT tissues were vulnerable to developing reentrant rhythms when stimulated by rapid pacing and catecholamine, recapitulating hallmark features of the disease. These conditions elevated diastolic Ca2+ levels and increased temporal and spatial dispersion of Ca2+ wave speed, creating a vulnerable arrhythmia substrate. Using Cas9 genome editing, we pinpointed a single catecholamine-driven phosphorylation event, ryanodine receptor-serine 2814 phosphorylation by Ca2+/calmodulin-dependent protein kinase II, that is required to unmask the arrhythmic potential of CPVT tissues.

CONCLUSIONS: Our study illuminates the molecular and cellular pathogenesis of CPVT and reveals a critical role of calmodulin-dependent protein kinase II-dependent reentry in the tissue-scale mechanism of this disease. We anticipate that this approach will be useful for modeling other inherited and acquired cardiac arrhythmias.

Medienart:

E-Artikel

Erscheinungsjahr:

2019

Erschienen:

2019

Enthalten in:

Zur Gesamtaufnahme - volume:140

Enthalten in:

Circulation - 140(2019), 5 vom: 30. Juli, Seite 390-404

Sprache:

Englisch

Beteiligte Personen:

Park, Sung-Jin [VerfasserIn]
Zhang, Donghui [VerfasserIn]
Qi, Yan [VerfasserIn]
Li, Yifei [VerfasserIn]
Lee, Keel Yong [VerfasserIn]
Bezzerides, Vassilios J [VerfasserIn]
Yang, Pengcheng [VerfasserIn]
Xia, Shutao [VerfasserIn]
Kim, Sean L [VerfasserIn]
Liu, Xujie [VerfasserIn]
Lu, Fujian [VerfasserIn]
Pasqualini, Francesco S [VerfasserIn]
Campbell, Patrick H [VerfasserIn]
Geva, Judith [VerfasserIn]
Roberts, Amy E [VerfasserIn]
Kleber, Andre G [VerfasserIn]
Abrams, Dominic J [VerfasserIn]
Pu, William T [VerfasserIn]
Parker, Kevin Kit [VerfasserIn]

Links:

Volltext

Themen:

Arrhythmias, cardiac
Biological engineering
CaMKII
Catecholaminergic polymorphic ventricular tachycardia disease models
Gene editing
Journal Article
Research Support, N.I.H., Extramural
Research Support, Non-U.S. Gov't
Research Support, U.S. Gov't, Non-P.H.S.
Stem cells

Anmerkungen:

Date Completed 24.04.2020

Date Revised 01.08.2023

published: Print-Electronic

Citation Status MEDLINE

doi:

10.1161/CIRCULATIONAHA.119.039711

funding:

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

NLM299241971