ArticleArchives of medical science : AMS2016
Deficiency of cyclase-associated protein 2 promotes arrhythmias associated with connexin43 maldistribution and fibrosis.
Article in Archives of medical science : AMS, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 10 papers.
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Who cites it
10 citing papers in PubMed, 19 citations in OpenAlex.
- Cyclase-associated protein interacts with actin filament barbed ends to promote depolymerization and formin displacement.The Journal of biological chemistry · 2023Article
- miRNA mediated downregulation of cyclase-associated protein 1 (CAP1) is required for myoblast fusion.Frontiers in cell and developmental biology · 2022Article
- Transthyretin amyloid fibrils alter primary fibroblast structure, function, and inflammatory gene expression.American journal of physiology. Heart and circulatory physiology · 2021Article
- Functional Redundancy of Cyclase-Associated Proteins CAP1 and CAP2 in Differentiating Neurons.Cells · 2021Article
- Cyclase-associated protein 2 (CAP2) controls MRTF-A localization and SRF activity in mouse embryonic fibroblasts.Scientific reports · 2021Article
- CAPt'n of Actin Dynamics: Recent Advances in the Molecular, Developmental and Physiological Functions of Cyclase-Associated Protein (CAP).Frontiers in cell and developmental biology · 2020Review
- CAP2 is a Valuable Biomarker for Diagnosis and Prognostic in Patients with Gastric Cancer.Pathology oncology research : POR · 2020Article
- CAP2 deficiency delays myofibril actin cytoskeleton differentiation and disturbs skeletal muscle architecture and function.Proceedings of the National Academy of Sciences of the United States of America · 2019Article
- Risk factors and prognostic role of an electrical storm in patients after myocardial infarction with an implanted ICD for secondary prevention.Archives of medical science : AMS · 2018Article
- Neuronal Actin Dynamics, Spine Density and Neuronal Dendritic Complexity Are Regulated by CAP2.Frontiers in cellular neuroscience · 2016Article
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Authors and funding
6 authors at 3 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
introductionCyclase-associated protein 2 (CAP2) plays a major role in regulating the actin cytoskeleton. Since inactivation of CAP2 in a mouse model by a gene trap approach (Cap2 (gt/gt) ) results in cardiomyopathy and increased mortality, we hypothesized that CAP2 has a major impact on arrhythmias and electrophysiological parameters. MATERIAL AND
methodsWe performed long-term-ECG recordings in transgenic CAP2 deficient mice (C57BL/6) to detect spontaneous arrhythmias. In vivo electrophysiological studies by right heart catheterization and ex vivo epicardial mapping were used to analyze electrophysiological parameters, the inducibility of arrhythmias, and conduction velocities. Expression and distribution of cardiac connexins and the amount of cardiac fibrosis were evaluated.
resultsSpontaneous ventricular arrhythmias could be detected in Cap2 (gt/gt) during the long-term-ECG recording. Cap2 (gt/gt) showed marked conduction delays at atrial and ventricular levels, including a reduced heart rate (421.0 ±40.6 bpm vs. 450.8 ±27.9 bpm; p < 0.01), and prolongations of PQ (46.3 ±4.1 ms vs. 38.6 ±6.5 ms; p < 0.01), QRS (16.2 ±2.6 ms vs. 12.6 ±1.4 ms; p < 0.01), and QTc interval (55.8 ±6.0 ms vs. 45.2 ±3.3 ms; p = 0.02) in comparison to wild type mice. The PQ prolongation was due to an infra-Hisian conduction delay (HV: 9.7 ±2.1 ms vs. 6.5 ±3.1 ms; p = 0.02). The inducibility of ventricular tachycardias during the electrophysiological studies was significantly elevated in the mutant mice (inducible animals: 88% vs. 33%; p = 0.04). Cap2 (gt/gt) showed more abnormal distribution of connexin43 compared to WT (23.0 ±4.7% vs. 2.9 ±0.8%; p < 0.01). Myocardial fibrosis was elevated in Cap2 (gt/gt) hearts (9.1 ±6.7% vs. 5.5 ±3.3%; p < 0.01).
conclusionsLoss of CAP2 results in marked electrophysiological disturbances including impaired sinus node function, conduction delays, and susceptibility to malignant arrhythmias. Structural changes in Cap2 (gt/gt) are associated with alterations in myocardial connexins and fibrosis.
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