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Göz M, Pohl G, Steinecker SM, Walhorn V, Milting H, Anselmetti D. Arrhythmogenic cardiomyopathy-related cadherin variants affect desmosomal binding kinetics. J Mol Cell Cardiol 2024; 195:36-44. [PMID: 39079569 DOI: 10.1016/j.yjmcc.2024.07.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/05/2024] [Revised: 07/09/2024] [Accepted: 07/25/2024] [Indexed: 08/05/2024]
Abstract
Cadherins are calcium dependent adhesion proteins that establish and maintain the intercellular mechanical contact by bridging the gap between adjacent cells. Desmoglein-2 (Dsg2) and desmocollin-2 (Dsc2) are tissue specific cadherin isoforms of the cell-cell contact in cardiac desmosomes. Mutations in the DSG2-gene and in the DSC2-gene are related to arrhythmogenic right ventricular cardiomyopathy (ARVC) a rare but severe heart muscle disease. Here, several possible homophilic and heterophilic binding interactions of wild-type Dsg2, wild-type Dsc2, as well as one Dsg2- and two Dsc2-variants, each associated with ARVC, are investigated. Using single molecule force spectroscopy (SMFS) with atomic force microscopy (AFM) and applying Jarzynski's equality the kinetics and thermodynamics of Dsg2/Dsc2 interaction can be determined. The free energy landscape of Dsg2/Dsc2 dimerization exposes a high activation energy barrier, which is in line with the proposed strand-swapping binding motif. Although the binding motif is not affected by any of the mutations, the binding kinetics of the interactions differ significantly from the wild-type. While wild-type cadherins exhibit an average complex lifetime of approx. 0.3 s interactions involving a variant consistently show - lifetimes that are substantially larger. The lifetimes of the wild-type interactions give rise to the picture of a dynamic adhesion interface consisting of continuously dissociating and (re)associating molecular bonds, while the delayed binding kinetics of interactions involving an ARVC-associated variant might be part of the pathogenesis. Our data provide a comprehensive and consistent thermodynamic and kinetic description of cardiac cadherin binding, allowing detailed insight into the molecular mechanisms of cell adhesion.
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Affiliation(s)
- Manuel Göz
- Department of Physics, Experimental Biophysics and Applied Nanoscience, Bielefeld University, Universitätsstraße 25, Bielefeld, Germany
| | - Greta Pohl
- Erich & Hanna Klessmann Institute for Cardiovascular Research and Development, Heart and Diabetes Center NRW, University Hospital of the Ruhr-University Bochum, Georgstraße 11, Bad Oeynhausen, Germany
| | - Sylvia M Steinecker
- Department of Physics, Experimental Biophysics and Applied Nanoscience, Bielefeld University, Universitätsstraße 25, Bielefeld, Germany
| | - Volker Walhorn
- Department of Physics, Experimental Biophysics and Applied Nanoscience, Bielefeld University, Universitätsstraße 25, Bielefeld, Germany.
| | - Hendrik Milting
- Erich & Hanna Klessmann Institute for Cardiovascular Research and Development, Heart and Diabetes Center NRW, University Hospital of the Ruhr-University Bochum, Georgstraße 11, Bad Oeynhausen, Germany
| | - Dario Anselmetti
- Department of Physics, Experimental Biophysics and Applied Nanoscience, Bielefeld University, Universitätsstraße 25, Bielefeld, Germany
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Uchechukwu CF, Anyaduba UL, Udekwu CC, Orababa OQ, Kade AE. Desmoglein-2 and COVID-19 complications: insights into its role as a biomarker, pathogenesis and clinical implications. J Gen Virol 2023; 104. [PMID: 37815458 DOI: 10.1099/jgv.0.001902] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/11/2023] Open
Abstract
Desmoglein-2 (DSG2) has emerged as a potential biomarker for coronavirus disease 2019 (COVID-19) complications, particularly cardiac and cardiovascular involvement. The expression of DSG2 in lung tissues has been detected at elevated levels, and circulating DSG2 levels correlate with COVID-19 severity. DSG2 may contribute to myocardial injury, cardiac dysfunction and vascular endothelial dysfunction in COVID-19. Monitoring DSG2 levels could aid in risk stratification, early detection and prognostication of COVID-19 complications. However, further research is required to validate DSG2 as a biomarker. Such research will aim to elucidate its precise role in pathogenesis, establishing standardized assays for its measurement and possibly identifying therapeutic targets.
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Affiliation(s)
- Chidiebere F Uchechukwu
- Institute of Immunology and Immunotherapy, University of Birmingham, Birmingham, UK
- Warwick Medical School, University of Warwick, Coventry, UK
- School of Life Sciences, University of Warwick, Coventry, UK
- Michael Okpara University of Agriculture, Umudike, Nigeria
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Remme CA, Heijman J, Gomez AM, Zaza A, Odening KE. 25 years of basic and translational science in EP Europace: novel insights into arrhythmia mechanisms and therapeutic strategies. Europace 2023; 25:euad210. [PMID: 37622575 PMCID: PMC10450791 DOI: 10.1093/europace/euad210] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2023] [Accepted: 06/19/2023] [Indexed: 08/26/2023] Open
Abstract
In the last 25 years, EP Europace has published more than 300 basic and translational science articles covering different arrhythmia types (ranging from atrial fibrillation to ventricular tachyarrhythmias), different diseases predisposing to arrhythmia formation (such as genetic arrhythmia disorders and heart failure), and different interventional and pharmacological anti-arrhythmic treatment strategies (ranging from pacing and defibrillation to different ablation approaches and novel drug-therapies). These studies have been conducted in cellular models, small and large animal models, and in the last couple of years increasingly in silico using computational approaches. In sum, these articles have contributed substantially to our pathophysiological understanding of arrhythmia mechanisms and treatment options; many of which have made their way into clinical applications. This review discusses a representative selection of EP Europace manuscripts covering the topics of pacing and ablation, atrial fibrillation, heart failure and pro-arrhythmic ventricular remodelling, ion channel (dys)function and pharmacology, inherited arrhythmia syndromes, and arrhythmogenic cardiomyopathies, highlighting some of the advances of the past 25 years. Given the increasingly recognized complexity and multidisciplinary nature of arrhythmogenesis and continued technological developments, basic and translational electrophysiological research is key advancing the field. EP Europace aims to further increase its contribution to the discovery of arrhythmia mechanisms and the implementation of mechanism-based precision therapy approaches in arrhythmia management.
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Affiliation(s)
- Carol Ann Remme
- Department of Experimental Cardiology, Amsterdam UMC location University of Amsterdam, Heart Centre, Academic Medical Center, Room K2-104.2, Meibergdreef 11, 1105 AZ Amsterdam, The Netherlands
- Amsterdam Cardiovascular Sciences, Heart Failure & Arrhythmias, Amsterdam, The Netherlands
| | - Jordi Heijman
- Department of Cardiology, Cardiovascular Research Institute Maastricht, Faculty of Health, Medicine and Life Sciences, Maastricht University, 6229 ER Maastricht, The Netherlands
| | - Ana M Gomez
- Signaling and Cardiovascular Pathophysiology, UMR-S 1180, Inserm, Université Paris-Saclay, 91400 Orsay, France
| | - Antonio Zaza
- Department of Biotechnology and Biosciences, University of Milano-Bicocca, 20126 Milan, Italy
| | - Katja E Odening
- Translational Cardiology, Department of Cardiology and Department of Physiology, Inselspital University Hospital Bern, University of Bern, 3012 Bern, Switzerland
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Pohl GM, Göz M, Gaertner A, Brodehl A, Cimen T, Saguner AM, Schulze-Bahr E, Walhorn V, Anselmetti D, Milting H. Cardiomyopathy related desmocollin-2 prodomain variants affect the intracellular cadherin transport and processing. Front Cardiovasc Med 2023; 10:1127261. [PMID: 37273868 PMCID: PMC10235514 DOI: 10.3389/fcvm.2023.1127261] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2022] [Accepted: 05/02/2023] [Indexed: 06/06/2023] Open
Abstract
Background Arrhythmogenic cardiomyopathy can be caused by genetic variants in desmosomal cadherins. Since cardiac desmosomal cadherins are crucial for cell-cell-adhesion, their correct localization at the plasma membrane is essential. Methods Nine desmocollin-2 variants at five positions from various public genetic databases (p.D30N, p.V52A/I, p.G77V/D/S, p.V79G, p.I96V/T) and three additional conserved positions (p.C32, p.C57, p.F71) within the prodomain were investigated in vitro using confocal microscopy. Model variants (p.C32A/S, p.V52G/L, p.C57A/S, p.F71Y/A/S, p.V79A/I/L, p.I96l/A) were generated to investigate the impact of specific amino acids. Results We revealed that all analyzed positions in the prodomain are critical for the intracellular transport. However, the variants p.D30N, p.V52A/I and p.I96V listed in genetic databases do not disturb the intracellular transport revealing that the loss of these canonical sequences may be compensated. Conclusion As disease-related homozygous truncating desmocollin-2 variants lacking the transmembrane domain are not localized at the plasma membrane, we predict that some of the investigated prodomain variants may be relevant in the context of arrhythmogenic cardiomyopathy due to disturbed intracellular transport.
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Affiliation(s)
- Greta Marie Pohl
- Erich & Hanna Klessmann-Institute for Cardiovascular Research and Development & Clinic for Thoracic and Cardiovascular Surgery, Heart- and Diabetes Center NRW, D-32545 Bad Oeynhausen, University Hospital of the Ruhr-University Bochum, Bad Oeynhausen, Germany
| | - Manuel Göz
- Experimental Biophysics and Applied Nanoscience, Faculty of Physics, University of Bielefeld, NRW, Bielefeld, Germany
| | - Anna Gaertner
- Erich & Hanna Klessmann-Institute for Cardiovascular Research and Development & Clinic for Thoracic and Cardiovascular Surgery, Heart- and Diabetes Center NRW, D-32545 Bad Oeynhausen, University Hospital of the Ruhr-University Bochum, Bad Oeynhausen, Germany
| | - Andreas Brodehl
- Erich & Hanna Klessmann-Institute for Cardiovascular Research and Development & Clinic for Thoracic and Cardiovascular Surgery, Heart- and Diabetes Center NRW, D-32545 Bad Oeynhausen, University Hospital of the Ruhr-University Bochum, Bad Oeynhausen, Germany
| | - Tolga Cimen
- Department of Cardiology, University Heart Center Zurich, University Hospital Zurich, Zürich, Switzerland
| | - Ardan M. Saguner
- Department of Cardiology, University Heart Center Zurich, University Hospital Zurich, Zürich, Switzerland
| | - Eric Schulze-Bahr
- Department of Cardiovascular Medicine, Institute for Genetics of Heart Diseases (IfGH), University Hospital Münster, Münster, Germany
| | - Volker Walhorn
- Experimental Biophysics and Applied Nanoscience, Faculty of Physics, University of Bielefeld, NRW, Bielefeld, Germany
| | - Dario Anselmetti
- Experimental Biophysics and Applied Nanoscience, Faculty of Physics, University of Bielefeld, NRW, Bielefeld, Germany
| | - Hendrik Milting
- Erich & Hanna Klessmann-Institute for Cardiovascular Research and Development & Clinic for Thoracic and Cardiovascular Surgery, Heart- and Diabetes Center NRW, D-32545 Bad Oeynhausen, University Hospital of the Ruhr-University Bochum, Bad Oeynhausen, Germany
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Lou J, Chen H, Huang S, Chen P, Yu Y, Chen F. Update on risk factors and biomarkers of sudden unexplained cardiac death. J Forensic Leg Med 2022; 87:102332. [DOI: 10.1016/j.jflm.2022.102332] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2020] [Revised: 02/21/2022] [Accepted: 03/02/2022] [Indexed: 02/01/2023]
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Rare Variants Associated with Arrhythmogenic Cardiomyopathy: Reclassification Five Years Later. J Pers Med 2021; 11:jpm11030162. [PMID: 33652588 PMCID: PMC7996798 DOI: 10.3390/jpm11030162] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2021] [Revised: 02/17/2021] [Accepted: 02/19/2021] [Indexed: 12/17/2022] Open
Abstract
Genetic interpretation of rare variants associated with arrhythmogenic cardiomyopathy (ACM) is essential due to their diagnostic implications. New data may relabel previous variant classifications, but how often reanalysis is necessary remains undefined. Five years ago, 39 rare ACM-related variants were identified in patients with features of cardiomyopathy. These variants were classified following the American College of Medical Genetics and Genomics’ guidelines. In the present study, we reevaluated these rare variants including novel available data. All cases carried one rare variant classified as being of ambiguous significance (82.05%) or likely pathogenic (17.95%) in 2016. In our comprehensive reanalysis, the classification of 30.77% of these variants changed, mainly due to updated global frequencies. As in 2016, nowadays most variants were classified as having an uncertain role (64.1%), but the proportion of variants with an uncertain role was significantly decreased (17.95%). The percentage of rare variants classified as potentially deleterious increased from 17.95% to 23.07%. Moreover, 83.33% of reclassified variants gained certainty. We propose that periodic genetic reanalysis of all rare variants associated with arrhythmogenic cardiomyopathy should be undertaken at least once every five years. Defining the roles of rare variants may help clinicians obtain a definite diagnosis.
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Qiu M, Yang C, Du H, Li Q, Zhang Z, Xiong X, Yu C, Song X, Hu C, Xia B, Yang L, Peng H, Liu L, Jiang X. Whole-genome resequencing reveals aberrant autosomal SNPs affect chicken feathering rate. Anim Biotechnol 2020; 33:884-896. [PMID: 33342337 DOI: 10.1080/10495398.2020.1846545] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
Previous studies have shown that the feather growth rate of chicks is determined by two alleles located on the sex chromosome Z; however, in chicken production, feathering is usually not consistently controlled by the sex chromosome. To identify whether the feathering rate is related to autosomal inheritance, whole-genome resequencing was performed in eight chickens with slow- and fast-feathering rate. A total of 54,984 autosomal single nucleotide polymorphisms (SNPs) were identified, including 393 and 376 exonic SNPs in slow-feathering and fast-feathering chickens, respectively. Mutated genes were mainly involved in response to stimuli and growth and reproduction processes. Mutated genes related to slow-feathering rate were mainly involved in wingless-type MMTV integration site signaling pathway and mitogen-activated protein kinase signaling pathway, whereas mutated genes associated with fast-feathering rate were primarily enriched in autophagy, calcium signaling pathway, extracellular matrix-receptor interaction, and Focal adhesion processes. Importantly, two SNPs, involved in feather development, were found in the exonic regions of Wnt signaling genes. These results shed new light on the relationship between genetic mutation and feather growth rate from the perspective of autosomal inheritance and may have economic significance in chicken breeding.
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Affiliation(s)
- Mohan Qiu
- Sichuan Animal Science Academy, Chengdu, Sichuan, China.,Animal Breeding and Genetics Key Laboratory of Sichuan Province, Chengdu, Sichuan, China
| | - Chaowu Yang
- Sichuan Animal Science Academy, Chengdu, Sichuan, China
| | - Huarui Du
- Sichuan Animal Science Academy, Chengdu, Sichuan, China
| | - Qingyun Li
- Sichuan Animal Science Academy, Chengdu, Sichuan, China
| | - Zengrong Zhang
- Sichuan Animal Science Academy, Chengdu, Sichuan, China.,Animal Breeding and Genetics Key Laboratory of Sichuan Province, Chengdu, Sichuan, China
| | - Xia Xiong
- Sichuan Animal Science Academy, Chengdu, Sichuan, China
| | - Chunlin Yu
- Sichuan Animal Science Academy, Chengdu, Sichuan, China
| | - Xiaoyan Song
- Animal Breeding and Genetics Key Laboratory of Sichuan Province, Chengdu, Sichuan, China
| | - Chenming Hu
- Sichuan Animal Science Academy, Chengdu, Sichuan, China
| | - Bo Xia
- Sichuan Animal Science Academy, Chengdu, Sichuan, China
| | - Li Yang
- Sichuan Animal Science Academy, Chengdu, Sichuan, China
| | - Han Peng
- Animal Breeding and Genetics Key Laboratory of Sichuan Province, Chengdu, Sichuan, China
| | - Lan Liu
- Sichuan Animal Science Academy, Chengdu, Sichuan, China
| | - Xiaosong Jiang
- Sichuan Animal Science Academy, Chengdu, Sichuan, China.,Animal Breeding and Genetics Key Laboratory of Sichuan Province, Chengdu, Sichuan, China
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