Evidence map›Paper›PMID 39435333›Full record

ArticleFrontiers in cell and developmental biology2024

Morphological, electrophysiological, and molecular alterations in foetal noncompacted cardiomyopathy induced by disruption of ROCK signalling.

David Sedmera, Veronika Olejnickova, Barbora Sankova, Hana Kolesova, Martin Bartos, Alena Kvasilova, Lauren C Phillips, Simon D Bamforth, Helen M Phillips

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Article in Frontiers in cell and developmental biology, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.

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2citing papers in PubMed
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3 · Its place in the literature

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2 citing papers in PubMed.

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4 · The record

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5 · Who and what money

Authors and funding

9 authors.

David SedmeraInstitute of Anatomy, First Faculty of Medicine, Charles University, Prague, Czechia.
Veronika OlejnickovaInstitute of Anatomy, First Faculty of Medicine, Charles University, Prague, Czechia.
Barbora SankovaInstitute of Anatomy, First Faculty of Medicine, Charles University, Prague, Czechia.
Hana KolesovaInstitute of Anatomy, First Faculty of Medicine, Charles University, Prague, Czechia.
Martin BartosInstitute of Anatomy, First Faculty of Medicine, Charles University, Prague, Czechia.
Alena KvasilovaInstitute of Anatomy, First Faculty of Medicine, Charles University, Prague, Czechia.
Lauren C PhillipsBiosciences Institute, Newcastle University, Newcastle upon Tyne, United Kingdom.
Simon D BamforthBiosciences Institute, Newcastle University, Newcastle upon Tyne, United Kingdom.
Helen M PhillipsBiosciences Institute, Newcastle University, Newcastle upon Tyne, United Kingdom.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Left ventricular noncompaction cardiomyopathy is associated with heart failure, arrhythmia, and sudden cardiac death. The developmental mechanism underpinning noncompaction in the adult heart is still not fully understood, with lack of trabeculae compaction, hypertrabeculation, and loss of proliferation cited as possible causes. To study this, we utilised a mouse model of aberrant Rho kinase (ROCK) signalling in cardiomyocytes, which led to a noncompaction phenotype during embryogenesis, and monitored how this progressed after birth and into adulthood. The cause of the early noncompaction at E15.5 was attributed to a decrease in proliferation in the developing ventricular wall. By E18.5, the phenotype became patchy, with regions of noncompaction interspersed with thick compacted areas of ventricular wall. To study how this altered myoarchitecture of the heart influenced impulse propagation in the developing and adult heart, we used histology with immunohistochemistry for gap junction protein expression, optical mapping, and electrocardiography. At the prenatal stages, a clear reduction in left ventricular wall thickness, accompanied by abnormal conduction of the ectopically paced beat in that area, was observed in mutant hearts. This correlated with increased expression of connexin-40 and connexin-43 in noncompacted trabeculae. In postnatal stages, left ventricular noncompaction was resolved, but the right ventricular wall remained structurally abnormal through to adulthood with cardiomyocyte hypertrophy and retention of myocardial crypts. Thus, this is a novel model of self-correcting embryonic hypertrabeculation cardiomyopathy, but it highlights that remodelling potential differs between the left and right ventricles. We conclude that disruption of ROCK signalling induces both morphological and electrophysiological changes that evolve over time, highlighting the link between myocyte proliferation and noncompaction phenotypes and electrophysiological differentiation.

Indexed as

cardiomyocyte proliferationcompactionconductionmouse embryonic heartmyocardial trabeculaeROCKventricular wall

Identifiers

PMID39435333
PMCPMC11491540

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