What question did this study set out to answer?

To examine the structural biology, regulation, and pathological remodeling of cardiac gap junction channels and their contribution to arrhythmogenesis.

September 14, 2021CellsOpen Access

Remodeling of Cardiac Gap Junctional Cell–Cell Coupling

Q: What is the clinical evidence from this study?

Study design: Review. Population: Cardiac remodeling and gap junctional cell-cell coupling.

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Key result

Cardiac gap junction remodeling in AF and MI alters conduction pathways, creating an arrhythmogenic substrate.

Key Points

To examine the structural biology, regulation, and pathological remodeling of cardiac gap junction channels and their contribution to arrhythmogenesis.
Synthesized molecular and physiological evidence on cardiac connexin isoforms (Cx43, Cx40, Cx45) and their spatial distribution in heart tissue.
Evaluated the regulatory impact of neurohormonal signaling pathways and mechanical forces on connexin expression and gap junction localization.
Cardiac electrical syncytium function and anisotropic conductivity depend on gap junctions predominantly formed by Cx43, Cx40, and Cx45 connexin isoforms.
Pathologies including atrial fibrillation, myocardial infarction, and cardiomyopathy alter connexin expression via angiotensin, endothelin, and catecholamine signaling.
Spatial redistribution and reduced expression of gap junctions diminish conduction velocity and create non-uniform anisotropy, establishing an arrhythmogenic substrate that may be modifiable by pharmacological interventions.

PICO

Population

Cardiac remodeling and gap junctional cell-cell coupling

Cardiac gap junctions undergo dynamic remodeling in various cardiac diseases, contributing to arrhythmogenic substrates through altered connexin expression and localization.

Discussion

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Implication

Gap junction remodeling may promote arrhythmogenesis in AF and MI; leaves open whether connexin-targeted therapies alter outcomes.

Cite This Study

Dhein et al. (2021) conducted a review in Cardiac remodeling and gap junctional cell-cell coupling. Cardiac gap junctions undergo remodeling in diseases such as atrial fibrillation and myocardial infarction, altering conduction pathways and potentially creating an arrhythmogenic substrate.

synapsesocial.com/papers/6a164116a2d9d2b88ec50d4f https://doi.org/10.3390/cells10092422

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Remodeling of Cardiac Gap Junctional Cell–Cell Coupling

Key Points

PICO

Discussion

Implication

Cite This Study

Remodeling of Cardiac Gap Junctional Cell–Cell Coupling

Key Points

PICO

Discussion

Implication

Cite This Study

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