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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] [What about the content of this article? (0)] [Affiliation(s)] [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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Bermúdez-Jiménez FJ, Carriel V, Santos-Mateo JJ, Fernández A, García-Hernández S, Ramos KA, Piqueras-Flores J, Cabrera-Romero E, Barriales-Villa R, de la Higuera Romero L, Alcalá López JE, Gimeno Blanes JR, Sánchez-Porras D, Campos F, Alaminos M, Oyonarte-Ramírez JM, Álvarez M, Tercedor L, Brodehl A, Jiménez-Jáimez J. ROD2 domain filamin C missense mutations exhibit a distinctive cardiac phenotype with restrictive/hypertrophic cardiomyopathy and saw-tooth myocardium. Rev Esp Cardiol (Engl Ed) 2023; 76:301-311. [PMID: 35952944 DOI: 10.1016/j.rec.2022.08.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Accepted: 07/28/2022] [Indexed: 04/29/2023]
Abstract
INTRODUCTION AND OBJECTIVES Missense mutations in the filamin C (FLNC) gene have been reported as cause of inherited cardiomyopathy. Knowledge of the pathogenicity and genotype-phenotype correlation remains scarce. Our aim was to describe a distinctive cardiac phenotype related to rare missense FLNC variants in the ROD2 domain. METHODS We recruited 21 unrelated families genetically evaluated because of hypertrophic cardiomyopathy (HCM)/restrictive cardiomyopathy (RCM) phenotype carrying rare missense variants in the ROD2 domain of FLNC (FLNC-mRod2). Carriers underwent advanced cardiac imaging and genetic cascade screening. Myocardial tissue from 3 explanted hearts of a missense FLNC carrier was histologically analyzed and compared with an FLNC-truncating variant heart sample and a healthy control. Plasmids independently containing 3 FLNC missense variants were transfected and analyzed using confocal microscopy. RESULTS Eleven families (52%) with 20 assessed individuals (37 [23.7-52.7]) years showed 15 cases with a cardiac phenotype consisting of an overlap of HCM-RCM and left ventricular hypertrabeculation (saw-tooth appearance). During a median follow-up of 6.49 years, they presented with advanced heart failure: 16 (80%) diastolic dysfunction, 3 heart transplants, 3 heart failure deaths) and absence of cardiac conduction disturbances or skeletal myopathy. A total of 6 families had moderate genotype-phenotype segregation, and the remaining were de novo variants. Differential extracellular matrix remodeling and FLNC distribution among cardiomyocytes were confirmed on histology. HT1080 and H9c2 cells did not reveal cytoplasmic aggregation of mutant FLNC. CONCLUSIONS FLNC-mRod2 variants show a high prevalence of an overlapped phenotype comprising RCM, HCM and deep hypertrabeculation with saw-tooth appearance and distinctive cardiac histopathological remodeling.
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Affiliation(s)
- Francisco José Bermúdez-Jiménez
- Servicio de Cardiología, Hospital Universitario Virgen de las Nieves, Instituto de Investigación Biosanitaria ibsGRANADA, Granada, Spain; Centro Nacional de Investigaciones Cardiovasculares Carlos III (CNIC), Madrid, Spain
| | - Víctor Carriel
- Departamento de Histología, Grupo de Ingeniería Tisular, Universidad de Granada, Instituto de Investigación Biosanitaria ibsGRANADA, Granada, Spain
| | - Juan José Santos-Mateo
- Servicio de Cardiología, Hospital Universitario Virgen de la Arrixaca, Instituto Murciano de Investigación Biosanitaria Virgen de la Arrixaca Murcia (IMIB), Murcia, Spain; Centro de Investigación Biomédica en Red de Enfermedades Cardiovasculares (CIBERCV), Spain; European Reference Network for Rare and Low Prevalence Complex Diseases of the Heart (ERN-Guard Heart), Amsterdam, Netherlands
| | - Adrián Fernández
- Servicio de Cardiología, Hospital Universitario Fundación Favaloro, Buenos Aires, Argentina
| | - Soledad García-Hernández
- Health in Code SL, Cardiología y Departamento Científico, Instituto de Investigación Biomédica de A Coruña (INIBIC), A Coruña, Spain
| | - Karina Analía Ramos
- Servicio de Cardiología, Hospital Centenario, Facultad de Ciencias Médicas, Universidad de Rosario, Argentina
| | - Jesús Piqueras-Flores
- Servicio de Cardiología, Hospital General Universitario de Ciudad Real, Ciudad Real, Spain
| | - Eva Cabrera-Romero
- Servicio de Cardiología, Hospital Universitario Puerta de Hierro-Majadahonda, Majadahonda, Madrid, Spain; Centro de Investigación Biomédica en Red de Enfermedades Cardiovasculares (CIBERCV), Spain
| | - Roberto Barriales-Villa
- Complexo Hospitalario Universitario A Coruña, Instituto de Investigación Biomédica de A Coruña (INIBIC), A Coruña, Spain
| | - Luis de la Higuera Romero
- Health in Code SL, Cardiología y Departamento Científico, Instituto de Investigación Biomédica de A Coruña (INIBIC), A Coruña, Spain
| | - Juan Emilio Alcalá López
- Servicio de Cardiología, Hospital Universitario Virgen de las Nieves, Instituto de Investigación Biosanitaria ibsGRANADA, Granada, Spain
| | - Juan Ramón Gimeno Blanes
- Servicio de Cardiología, Hospital Universitario Virgen de la Arrixaca, Instituto Murciano de Investigación Biosanitaria Virgen de la Arrixaca Murcia (IMIB), Murcia, Spain; Centro de Investigación Biomédica en Red de Enfermedades Cardiovasculares (CIBERCV), Spain; European Reference Network for Rare and Low Prevalence Complex Diseases of the Heart (ERN-Guard Heart), Amsterdam, Netherlands
| | - David Sánchez-Porras
- Departamento de Histología, Grupo de Ingeniería Tisular, Universidad de Granada, Instituto de Investigación Biosanitaria ibsGRANADA, Granada, Spain
| | - Fernando Campos
- Departamento de Histología, Grupo de Ingeniería Tisular, Universidad de Granada, Instituto de Investigación Biosanitaria ibsGRANADA, Granada, Spain
| | - Miguel Alaminos
- Departamento de Histología, Grupo de Ingeniería Tisular, Universidad de Granada, Instituto de Investigación Biosanitaria ibsGRANADA, Granada, Spain
| | - José Manuel Oyonarte-Ramírez
- Servicio de Cardiología, Hospital Universitario Virgen de las Nieves, Instituto de Investigación Biosanitaria ibsGRANADA, Granada, Spain
| | - Miguel Álvarez
- Servicio de Cardiología, Hospital Universitario Virgen de las Nieves, Instituto de Investigación Biosanitaria ibsGRANADA, Granada, Spain
| | - Luis Tercedor
- Servicio de Cardiología, Hospital Universitario Virgen de las Nieves, Instituto de Investigación Biosanitaria ibsGRANADA, Granada, Spain
| | - Andreas Brodehl
- Erich and Hanna Klessmann Institute for Cardiovascular Research & Development (EHKI), Heart and Diabetes Center NRW, University Hospital of the Ruhr-University Bochum, Bad Oeynhausen, Germany
| | - Juan Jiménez-Jáimez
- Servicio de Cardiología, Hospital Universitario Virgen de las Nieves, Instituto de Investigación Biosanitaria ibsGRANADA, Granada, Spain.
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Tiemann J, Lindenkamp C, Wagner T, Brodehl A, Plümers R, Faust-Hinse I, Knabbe C, Hendig D. The Consideration of Pseudoxanthoma Elasticum as a Progeria Syndrome. FRONT BIOSCI-LANDMRK 2023; 28:55. [PMID: 37005749 DOI: 10.31083/j.fbl2803055] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2022] [Revised: 12/01/2022] [Accepted: 12/02/2022] [Indexed: 03/22/2023]
Abstract
BACKGROUND Pseudoxanthoma elasticum (PXE) is a rare autosomal recessive disorder caused by mutations in the ATP-binding cassette sub-family C member 6 (ABCC6) gene. Patients with PXE show molecular and clinical characteristics of known premature aging syndromes, such as Hutchinson-Gilford progeria syndrome (HGPS). Nevertheless, PXE has only barely been discussed against the background of premature aging, although a detailed characterization of aging processes in PXE could contribute to a better understanding of its pathogenesis. Thus, this study was performed to evaluate whether relevant factors which are known to play a role in accelerated aging processes in HGPS pathogenesis are also dysregulated in PXE. METHODS Primary human dermal fibroblasts from healthy donors (n = 3) and PXE patients (n = 3) and were cultivated under different culture conditions as our previous studies point towards effects of nutrient depletion on PXE phenotype. Gene expression of lamin A, lamin C, nucleolin, farnesyltransferase and zinc metallopeptidase STE24 were determined by quantitative real-time polymerase chain reaction. Additionally, protein levels of lamin A, C and nucleolin were evaluated by immunofluorescence and the telomere length was analyzed. RESULTS We could show a significant decrease of lamin A and C gene expression in PXE fibroblasts under nutrient depletion compared to controls. The gene expression of progerin and farnesyltransferase showed a significant increase in PXE fibroblasts when cultivated in 10% fetal calf serum (FCS) compared to controls. Immunofluorescence microscopy of lamin A/C and nucleolin and mRNA expression of zinc metallopeptidase STE24 and nucleolin showed no significant changes in any case. The determination of the relative telomere length showed significantly longer telomeres for PXE fibroblasts compared to controls when cultivated in 10% FCS. CONCLUSIONS These data indicate that PXE fibroblasts possibly undergo a kind of senescence which is independent of telomere damage and not triggered by defects of the nuclear envelope or nucleoli deformation.
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Affiliation(s)
- Janina Tiemann
- Institut für Laboratoriums- und Transfusionsmedizin, Herz- und Diabeteszentrum Nordrhein-Westfalen, Universitätsklinik der Ruhr-Universität Bochum, 32545 Bad Oeynhausen, Germany
| | - Christopher Lindenkamp
- Institut für Laboratoriums- und Transfusionsmedizin, Herz- und Diabeteszentrum Nordrhein-Westfalen, Universitätsklinik der Ruhr-Universität Bochum, 32545 Bad Oeynhausen, Germany
| | - Thomas Wagner
- Institut für Laboratoriums- und Transfusionsmedizin, Herz- und Diabeteszentrum Nordrhein-Westfalen, Universitätsklinik der Ruhr-Universität Bochum, 32545 Bad Oeynhausen, Germany
| | - Andreas Brodehl
- E. & H. Klessmann Institute for Cardiovascular Research & Development, Herz- und Diabeteszentrum Nordrhein-Westfalen, Universitätsklinik der Ruhr-Universität Bochum, 32545 Bad Oeynhausen, Germany
| | - Ricarda Plümers
- Institut für Laboratoriums- und Transfusionsmedizin, Herz- und Diabeteszentrum Nordrhein-Westfalen, Universitätsklinik der Ruhr-Universität Bochum, 32545 Bad Oeynhausen, Germany
| | - Isabel Faust-Hinse
- Institut für Laboratoriums- und Transfusionsmedizin, Herz- und Diabeteszentrum Nordrhein-Westfalen, Universitätsklinik der Ruhr-Universität Bochum, 32545 Bad Oeynhausen, Germany
| | - Cornelius Knabbe
- Institut für Laboratoriums- und Transfusionsmedizin, Herz- und Diabeteszentrum Nordrhein-Westfalen, Universitätsklinik der Ruhr-Universität Bochum, 32545 Bad Oeynhausen, Germany
| | - Doris Hendig
- Institut für Laboratoriums- und Transfusionsmedizin, Herz- und Diabeteszentrum Nordrhein-Westfalen, Universitätsklinik der Ruhr-Universität Bochum, 32545 Bad Oeynhausen, Germany
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Gaertner A, Burr L, Klauke B, Brodehl A, Laser KT, Klingel K, Tiesmeier J, Schulz U, zu Knyphausen E, Gummert J, Milting H. Compound Heterozygous FKTN Variants in a Patient with Dilated Cardiomyopathy Led to an Aberrant α-Dystroglycan Pattern. Int J Mol Sci 2022; 23:ijms23126685. [PMID: 35743126 PMCID: PMC9223741 DOI: 10.3390/ijms23126685] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2022] [Revised: 06/13/2022] [Accepted: 06/14/2022] [Indexed: 02/01/2023] Open
Abstract
Fukutin encoded by FKTN is a ribitol 5-phosphate transferase involved in glycosylation of α-dystroglycan. It is known that mutations in FKTN affect the glycosylation of α-dystroglycan, leading to a dystroglycanopathy. Dystroglycanopathies are a group of syndromes with a broad clinical spectrum including dilated cardiomyopathy and muscular dystrophy. In this study, we reported the case of a patient with muscular dystrophy, early onset dilated cardiomyopathy, and elevated creatine kinase levels who was a carrier of the compound heterozygous variants p.Ser299Arg and p.Asn442Ser in FKTN. Our work showed that compound heterozygous mutations in FKTN lead to a loss of fully glycosylated α-dystroglycan and result in cardiomyopathy and end-stage heart failure at a young age.
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Affiliation(s)
- Anna Gaertner
- Erich und Hanna Klessmann-Institut für Kardiovaskuläre Forschung und Entwicklung, Klinik für Thorax- und Kardiovaskularchirurgie, Herz und Diabeteszentrum NRW, Universitätsklinikum der Ruhr-Universität Bochum, Georgstr. 11, 32545 Bad Oeynhausen, Germany; (L.B.); (B.K.); (A.B.); (J.T.); (U.S.); (J.G.)
- Correspondence: (A.G.); (H.M.)
| | - Lidia Burr
- Erich und Hanna Klessmann-Institut für Kardiovaskuläre Forschung und Entwicklung, Klinik für Thorax- und Kardiovaskularchirurgie, Herz und Diabeteszentrum NRW, Universitätsklinikum der Ruhr-Universität Bochum, Georgstr. 11, 32545 Bad Oeynhausen, Germany; (L.B.); (B.K.); (A.B.); (J.T.); (U.S.); (J.G.)
| | - Baerbel Klauke
- Erich und Hanna Klessmann-Institut für Kardiovaskuläre Forschung und Entwicklung, Klinik für Thorax- und Kardiovaskularchirurgie, Herz und Diabeteszentrum NRW, Universitätsklinikum der Ruhr-Universität Bochum, Georgstr. 11, 32545 Bad Oeynhausen, Germany; (L.B.); (B.K.); (A.B.); (J.T.); (U.S.); (J.G.)
| | - Andreas Brodehl
- Erich und Hanna Klessmann-Institut für Kardiovaskuläre Forschung und Entwicklung, Klinik für Thorax- und Kardiovaskularchirurgie, Herz und Diabeteszentrum NRW, Universitätsklinikum der Ruhr-Universität Bochum, Georgstr. 11, 32545 Bad Oeynhausen, Germany; (L.B.); (B.K.); (A.B.); (J.T.); (U.S.); (J.G.)
| | - Kai Thorsten Laser
- Zentrum für Angeborene Herzfehler, Herz und Diabeteszentrum NRW, Universitätsklinikum der Ruhr-Universität Bochum, Georgstr. 11, 32545 Bad Oeynhausen, Germany; (K.T.L.); (E.z.K.)
| | - Karin Klingel
- Kardiopathologie, Institut für Pathologie und Neuropathologie, Universitätsklinikum Tübingen, Liebermeisterstraße 8, 72076 Tübingen, Germany;
| | - Jens Tiesmeier
- Erich und Hanna Klessmann-Institut für Kardiovaskuläre Forschung und Entwicklung, Klinik für Thorax- und Kardiovaskularchirurgie, Herz und Diabeteszentrum NRW, Universitätsklinikum der Ruhr-Universität Bochum, Georgstr. 11, 32545 Bad Oeynhausen, Germany; (L.B.); (B.K.); (A.B.); (J.T.); (U.S.); (J.G.)
| | - Uwe Schulz
- Erich und Hanna Klessmann-Institut für Kardiovaskuläre Forschung und Entwicklung, Klinik für Thorax- und Kardiovaskularchirurgie, Herz und Diabeteszentrum NRW, Universitätsklinikum der Ruhr-Universität Bochum, Georgstr. 11, 32545 Bad Oeynhausen, Germany; (L.B.); (B.K.); (A.B.); (J.T.); (U.S.); (J.G.)
| | - Edzard zu Knyphausen
- Zentrum für Angeborene Herzfehler, Herz und Diabeteszentrum NRW, Universitätsklinikum der Ruhr-Universität Bochum, Georgstr. 11, 32545 Bad Oeynhausen, Germany; (K.T.L.); (E.z.K.)
| | - Jan Gummert
- Erich und Hanna Klessmann-Institut für Kardiovaskuläre Forschung und Entwicklung, Klinik für Thorax- und Kardiovaskularchirurgie, Herz und Diabeteszentrum NRW, Universitätsklinikum der Ruhr-Universität Bochum, Georgstr. 11, 32545 Bad Oeynhausen, Germany; (L.B.); (B.K.); (A.B.); (J.T.); (U.S.); (J.G.)
| | - Hendrik Milting
- Erich und Hanna Klessmann-Institut für Kardiovaskuläre Forschung und Entwicklung, Klinik für Thorax- und Kardiovaskularchirurgie, Herz und Diabeteszentrum NRW, Universitätsklinikum der Ruhr-Universität Bochum, Georgstr. 11, 32545 Bad Oeynhausen, Germany; (L.B.); (B.K.); (A.B.); (J.T.); (U.S.); (J.G.)
- Correspondence: (A.G.); (H.M.)
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Gaertner A, Brodehl A, Sielemann K, Knoll R, Gummert J, Milting H. Identification of novel N-terminal splice variants in the DCM-associated gene RBM20. Cardiovasc Res 2022. [DOI: 10.1093/cvr/cvac066.129] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Funding Acknowledgements
Type of funding sources: Foundation. Main funding source(s): Erich und Hanna Klessmann Foundation
Introduction
Mutations in human RBM20, encoding the RNA binding protein 20, cause dilated cardiomyopathy (DCM). Within the nucleus RBM20 partially colocalies with other splicing factors. Sequencing of the cardiac transcriptome of a RBM20-deficient rat model revealed RBM20-dependent regulation of myocardial alternative splicing. We identified several carriers of RBM20 mutations.
In the literature, it is postulated that in myocardial tissue only one cardiac form of RBM20 with transcription start in exon 2 is expressed. However, it remains unclear why in the heart this alternative start codon is used. Furthermore, the function of putative different transcripts is unknown.
Methods
We analyzed human myocardial cDNA by 5’RACE to identify novel 5’-terminal RBM20 transcripts using gene specific primers within exon 2. Furthermore, we performed RNA-Seq analysis to detect different RBM20 transcripts directly in the human heart.
Results
By 5’RACE we could identify additional RBM20 exons localized within the first intron. The usage of two of these exons (internal exons, IE1 and IE2) instead of exon 1 results in transcripts with translation starting in the second exon. The usage of the third alternative internal exon (IE3) might result in a protein differing from full length and cardiac RBM20. Furthermore, we identified transcripts using an alternative exon, which is localized upstream of exon 1. In addition, a transcript comprising exon 1 and 2 of RBM20 was also detected by 5’ RACE. Using RNA-Seq we verified the expression of the transcripts containing exon 1, IE1 and IE2 in the human heart, respectively.
Conclusions
Here, we present first data on different N-terminal RBM20 transcripts in the human myocardium. In contrast to previous assumptions we identified different splicing forms of RBM20 with unknown functional impact in the human heart. As RBM20 is a DCM-associated gene, the function of the different RBM20 splicing variants might be interesting with respect to cardiomyopathies.
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Affiliation(s)
- A Gaertner
- Heart and Diabetes Center NRW, Erich und Hanna Klessmann-Institut für Kardiovaskuläre Forschung und Entwicklung , Bad Oeynhausen , Germany
| | - A Brodehl
- Heart and Diabetes Center NRW, Erich und Hanna Klessmann-Institut für Kardiovaskuläre Forschung und Entwicklung , Bad Oeynhausen , Germany
| | - K Sielemann
- Heart and Diabetes Center NRW, Erich und Hanna Klessmann-Institut für Kardiovaskuläre Forschung und Entwicklung , Bad Oeynhausen , Germany
| | - R Knoll
- Karolinska Institute , Stockholm , Sweden
| | - J Gummert
- Herz- und Diabeteszentrum NRW, Ruhr-Universitaet Bochum , Bad Oeynhausen , Germany
| | - H Milting
- Heart and Diabetes Center NRW, Erich und Hanna Klessmann-Institut für Kardiovaskuläre Forschung und Entwicklung , Bad Oeynhausen , Germany
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Boogerd CJ, Lacraz GPA, Vértesy Á, van Kampen SJ, Perini I, de Ruiter H, Versteeg D, Brodehl A, van der Kraak P, Giacca M, de Jonge N, Junker JP, van Oudenaarden A, Vink A, van Rooij E. OUP accepted manuscript. Cardiovasc Res 2022; 119:477-491. [PMID: 35576477 PMCID: PMC10064846 DOI: 10.1093/cvr/cvac072] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/06/2021] [Revised: 04/12/2022] [Accepted: 04/20/2022] [Indexed: 11/13/2022] Open
Abstract
AIMS Arrhythmogenic cardiomyopathy (ACM) is an inherited cardiac disorder that is characterized by progressive loss of myocardium that is replaced by fibro-fatty cells, arrhythmias, and sudden cardiac death. While myocardial degeneration and fibro-fatty replacement occur in specific locations, the underlying molecular changes remain poorly characterized. Here, we aim to delineate local changes in gene expression to identify new genes and pathways that are relevant for specific remodelling processes occurring during ACM. METHODS AND RESULTS Using Tomo-Seq, genome-wide transcriptional profiling with high spatial resolution, we created transmural epicardial-to-endocardial gene expression atlases of explanted ACM hearts to gain molecular insights into disease-driving processes. This enabled us to link gene expression profiles to the different regional remodelling responses and allowed us to identify genes that are potentially relevant for disease progression. In doing so, we identified distinct gene expression profiles marking regions of cardiomyocyte degeneration and fibro-fatty remodelling and revealed Zinc finger and BTB domain-containing protein 11 (ZBTB11) to be specifically enriched at sites of active fibro-fatty replacement of myocardium. Immunohistochemistry indicated ZBTB11 to be induced in cardiomyocytes flanking fibro-fatty areas, which could be confirmed in multiple cardiomyopathy patients. Forced overexpression of ZBTB11 induced autophagy and cell death-related gene programmes in human cardiomyocytes, leading to increased apoptosis. CONCLUSION Our study shows the power of Tomo-Seq to unveil new molecular mechanisms in human cardiomyopathy and uncovers ZBTB11 as a novel driver of cardiomyocyte loss.
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Affiliation(s)
| | | | | | - Sebastiaan J van Kampen
- Hubrecht Institute, Royal Netherlands Academy of Arts and Sciences (KNAW) and University Medical Center Utrecht, Utrecht, The Netherlands
| | - Ilaria Perini
- Hubrecht Institute, Royal Netherlands Academy of Arts and Sciences (KNAW) and University Medical Center Utrecht, Utrecht, The Netherlands
| | - Hesther de Ruiter
- Hubrecht Institute, Royal Netherlands Academy of Arts and Sciences (KNAW) and University Medical Center Utrecht, Utrecht, The Netherlands
| | - Danielle Versteeg
- Hubrecht Institute, Royal Netherlands Academy of Arts and Sciences (KNAW) and University Medical Center Utrecht, Utrecht, The Netherlands
| | - Andreas Brodehl
- Heart and Diabetes Center NRW, University Hospital of the Ruhr-University Bochum, Bad Oeynhausen, Germany
| | - Petra van der Kraak
- Department of Pathology, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands
| | - Mauro Giacca
- School of Cardiovascular Medicine and Sciences, King’s College London British Heart Foundation Centre, London, UK
| | - Nicolaas de Jonge
- Department of Cardiology, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands
| | - Jan Philipp Junker
- Berlin Institute for Medical Systems Biology, Max Delbrück Center for Molecular Medicine, Berlin, Germany
| | - Alexander van Oudenaarden
- Hubrecht Institute, Royal Netherlands Academy of Arts and Sciences (KNAW) and University Medical Center Utrecht, Utrecht, The Netherlands
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Brodehl A, Hain C, Flottmann F, Ratnavadivel S, Gaertner A, Klauke B, Kalinowski J, Körperich H, Gummert J, Paluszkiewicz L, Deutsch MA, Milting H. The Desmin Mutation DES-c.735G>C Causes Severe Restrictive Cardiomyopathy by Inducing In-Frame Skipping of Exon-3. Biomedicines 2021; 9:biomedicines9101400. [PMID: 34680517 PMCID: PMC8533191 DOI: 10.3390/biomedicines9101400] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2021] [Revised: 10/01/2021] [Accepted: 10/02/2021] [Indexed: 02/02/2023] Open
Abstract
Currently, little is known about the genetic background of restrictive cardiomyopathy (RCM). Herein, we screened an index patient with RCM in combination with atrial fibrillation using a next generation sequencing (NGS) approach and identified the heterozygous mutation DES-c.735G>C. As DES-c.735G>C affects the last base pair of exon-3, it is unknown whether putative missense or splice site mutations are caused. Therefore, we applied nanopore amplicon sequencing revealing the expression of a transcript without exon-3 in the explanted myocardial tissue of the index patient. Western blot analysis verified this finding at the protein level. In addition, we performed cell culture experiments revealing an abnormal cytoplasmic aggregation of the truncated desmin form (p.D214-E245del) but not of the missense variant (p.E245D). In conclusion, we show that DES-c.735G>C causes a splicing defect leading to exon-3 skipping of the DES gene. DES-c.735G>C can be classified as a pathogenic mutation associated with RCM and atrial fibrillation. In the future, this finding might have relevance for the genetic understanding of similar cases.
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Affiliation(s)
- Andreas Brodehl
- Heart and Diabetes Center NRW, Erich and Hanna Klessmann Institute, University Hospital of the Ruhr-University Bochum, Georgstrasse 11, D-32545 Bad Oeynhausen, Germany; (F.F.); (S.R.); (A.G.); (B.K.); (J.G.)
- Correspondence: (A.B.); (H.M.); Tel.: +49-(0)5731-973530 (A.B.); +49-(0)5731-973510 (H.M.)
| | - Carsten Hain
- Microbial Genomics and Biotechnology, Center for Biotechnology, Bielefeld University, D-33615 Bielefeld, Germany; (C.H.); (J.K.)
| | - Franziska Flottmann
- Heart and Diabetes Center NRW, Erich and Hanna Klessmann Institute, University Hospital of the Ruhr-University Bochum, Georgstrasse 11, D-32545 Bad Oeynhausen, Germany; (F.F.); (S.R.); (A.G.); (B.K.); (J.G.)
| | - Sandra Ratnavadivel
- Heart and Diabetes Center NRW, Erich and Hanna Klessmann Institute, University Hospital of the Ruhr-University Bochum, Georgstrasse 11, D-32545 Bad Oeynhausen, Germany; (F.F.); (S.R.); (A.G.); (B.K.); (J.G.)
| | - Anna Gaertner
- Heart and Diabetes Center NRW, Erich and Hanna Klessmann Institute, University Hospital of the Ruhr-University Bochum, Georgstrasse 11, D-32545 Bad Oeynhausen, Germany; (F.F.); (S.R.); (A.G.); (B.K.); (J.G.)
| | - Bärbel Klauke
- Heart and Diabetes Center NRW, Erich and Hanna Klessmann Institute, University Hospital of the Ruhr-University Bochum, Georgstrasse 11, D-32545 Bad Oeynhausen, Germany; (F.F.); (S.R.); (A.G.); (B.K.); (J.G.)
- Clinic for General and Interventional Cardiology/Angiology, Heart and Diabetes Center NRW, University Hospital of the Ruhr-University Bochum, Georgstrasse 11, D-32545 Bad Oeynhausen, Germany
| | - Jörn Kalinowski
- Microbial Genomics and Biotechnology, Center for Biotechnology, Bielefeld University, D-33615 Bielefeld, Germany; (C.H.); (J.K.)
| | - Hermann Körperich
- Heart and Diabetes Center NRW, Institute for Radiology, Nuclear Medicine and Molecular Imaging, University Hospital of the Ruhr-University Bochum, Georgstrasse 11, D-32545 Bad Oeynhausen, Germany;
| | - Jan Gummert
- Heart and Diabetes Center NRW, Erich and Hanna Klessmann Institute, University Hospital of the Ruhr-University Bochum, Georgstrasse 11, D-32545 Bad Oeynhausen, Germany; (F.F.); (S.R.); (A.G.); (B.K.); (J.G.)
- Heart and Diabetes Center NRW, Department of Thoracic and Cardiovascular Surgery, University Hospital Ruhr-University Bochum, Georgstrasse 11, D-32545 Bad Oeynhausen, Germany; (L.P.); (M.-A.D.)
| | - Lech Paluszkiewicz
- Heart and Diabetes Center NRW, Department of Thoracic and Cardiovascular Surgery, University Hospital Ruhr-University Bochum, Georgstrasse 11, D-32545 Bad Oeynhausen, Germany; (L.P.); (M.-A.D.)
| | - Marcus-André Deutsch
- Heart and Diabetes Center NRW, Department of Thoracic and Cardiovascular Surgery, University Hospital Ruhr-University Bochum, Georgstrasse 11, D-32545 Bad Oeynhausen, Germany; (L.P.); (M.-A.D.)
| | - Hendrik Milting
- Heart and Diabetes Center NRW, Erich and Hanna Klessmann Institute, University Hospital of the Ruhr-University Bochum, Georgstrasse 11, D-32545 Bad Oeynhausen, Germany; (F.F.); (S.R.); (A.G.); (B.K.); (J.G.)
- Correspondence: (A.B.); (H.M.); Tel.: +49-(0)5731-973530 (A.B.); +49-(0)5731-973510 (H.M.)
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8
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Abstract
Purpose of Review Arrhythmogenic cardiomyopathy (ACM) is a genetic disease characterized by life-threatening ventricular arrhythmias and sudden cardiac death (SCD) in apparently healthy young adults. Mutations in genes encoding for cellular junctions can be found in about half of the patients. However, disease onset and severity, risk of arrhythmias, and outcome are highly variable and drug-targeted treatment is currently unavailable. Recent Findings This review focuses on advances in clinical risk stratification, genetic etiology, and pathophysiological concepts. The desmosome is the central part of the disease, but other intercalated disc and associated structural proteins not only broaden the genetic spectrum but also provide novel molecular and cellular insights into the pathogenesis of ACM. Signaling pathways and the role of inflammation will be discussed and targets for novel therapeutic approaches outlined. Summary Genetic discoveries and experimental-driven preclinical research contributed significantly to the understanding of ACM towards mutation- and pathway-specific personalized medicine.
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Affiliation(s)
- Brenda Gerull
- Comprehensive Heart Failure Center (CHFC), Department of Medicine I, University Clinic Würzburg, Am Schwarzenberg 15, 97078, Würzburg, Germany.
| | - Andreas Brodehl
- Heart and Diabetes Center NRW, Erich and Hanna Klessmann Institute, University Hospital of the Ruhr-University Bochum, Georgstrasse 11, 32545, Bad Oeynhausen, Germany
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9
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Myasnikov R, Brodehl A, Meshkov A, Kulikova O, Kiseleva A, Pohl GM, Sotnikova E, Divashuk M, Klimushina M, Zharikova A, Pokrovskaya M, Koretskiy S, Kharlap M, Mershina E, Sinitsyn V, Basargina E, Gandaeva L, Barskiy V, Boytsov S, Milting H, Drapkina O. The Double Mutation DSG2-p.S363X and TBX20-p.D278X Is Associated with Left Ventricular Non-Compaction Cardiomyopathy: Case Report. Int J Mol Sci 2021; 22:ijms22136775. [PMID: 34202524 PMCID: PMC8268202 DOI: 10.3390/ijms22136775] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2021] [Revised: 06/10/2021] [Accepted: 06/22/2021] [Indexed: 12/12/2022] Open
Abstract
Left ventricular non-compaction cardiomyopathy (LVNC) is a rare heart disease, with or without left ventricular dysfunction, which is characterized by a two-layer structure of the myocardium and an increased number of trabeculae. The study of familial forms of LVNC is helpful for risk prediction and genetic counseling of relatives. Here, we present a family consisting of three members with LVNC. Using a next-generation sequencing approach a combination of two (likely) pathogenic nonsense mutations DSG2-p.S363X and TBX20-p.D278X was identified in all three patients. TBX20 encodes the cardiac T-box transcription factor 20. DSG2 encodes desmoglein–2, which is part of the cardiac desmosomes and belongs to the cadherin family. Since the identified nonsense variant (DSG2-p.S363X) is localized in the extracellular domain of DSG2, we performed in vitro cell transfection experiments. These experiments revealed the absence of truncated DSG2 at the plasma membrane, supporting the pathogenic relevance of DSG2-p.S363X. In conclusion, we suggest that in the future, these findings might be helpful for genetic screening and counseling of patients with LVNC.
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Affiliation(s)
- Roman Myasnikov
- National Research Center for Therapy and Preventive Medicine, Petroverigskiy Lane 10, 101990 Moscow, Russia; (R.M.); (A.M.); (O.K.); (E.S.); (M.D.); (M.K.); (A.Z.); (M.P.); (S.K.); (M.K.); (O.D.)
| | - Andreas Brodehl
- Erich and Hanna Klessmann Institute, Heart and Diabetes Center NRW, University Hospital of the Ruhr-University Bochum, Georgstrasse 11, 32545 Bad Oeynhausen, Germany; (G.M.P.); (H.M.)
- Correspondence: (A.B.); (A.K.)
| | - Alexey Meshkov
- National Research Center for Therapy and Preventive Medicine, Petroverigskiy Lane 10, 101990 Moscow, Russia; (R.M.); (A.M.); (O.K.); (E.S.); (M.D.); (M.K.); (A.Z.); (M.P.); (S.K.); (M.K.); (O.D.)
| | - Olga Kulikova
- National Research Center for Therapy and Preventive Medicine, Petroverigskiy Lane 10, 101990 Moscow, Russia; (R.M.); (A.M.); (O.K.); (E.S.); (M.D.); (M.K.); (A.Z.); (M.P.); (S.K.); (M.K.); (O.D.)
| | - Anna Kiseleva
- National Research Center for Therapy and Preventive Medicine, Petroverigskiy Lane 10, 101990 Moscow, Russia; (R.M.); (A.M.); (O.K.); (E.S.); (M.D.); (M.K.); (A.Z.); (M.P.); (S.K.); (M.K.); (O.D.)
- Correspondence: (A.B.); (A.K.)
| | - Greta Marie Pohl
- Erich and Hanna Klessmann Institute, Heart and Diabetes Center NRW, University Hospital of the Ruhr-University Bochum, Georgstrasse 11, 32545 Bad Oeynhausen, Germany; (G.M.P.); (H.M.)
| | - Evgeniia Sotnikova
- National Research Center for Therapy and Preventive Medicine, Petroverigskiy Lane 10, 101990 Moscow, Russia; (R.M.); (A.M.); (O.K.); (E.S.); (M.D.); (M.K.); (A.Z.); (M.P.); (S.K.); (M.K.); (O.D.)
| | - Mikhail Divashuk
- National Research Center for Therapy and Preventive Medicine, Petroverigskiy Lane 10, 101990 Moscow, Russia; (R.M.); (A.M.); (O.K.); (E.S.); (M.D.); (M.K.); (A.Z.); (M.P.); (S.K.); (M.K.); (O.D.)
- All-Russia Research Institute of Agricultural Biotechnology, Timiryazevskaya Street, 42, 127550 Moscow, Russia
| | - Marina Klimushina
- National Research Center for Therapy and Preventive Medicine, Petroverigskiy Lane 10, 101990 Moscow, Russia; (R.M.); (A.M.); (O.K.); (E.S.); (M.D.); (M.K.); (A.Z.); (M.P.); (S.K.); (M.K.); (O.D.)
| | - Anastasia Zharikova
- National Research Center for Therapy and Preventive Medicine, Petroverigskiy Lane 10, 101990 Moscow, Russia; (R.M.); (A.M.); (O.K.); (E.S.); (M.D.); (M.K.); (A.Z.); (M.P.); (S.K.); (M.K.); (O.D.)
- Faculty of Bioengineering and Bioinformatics, Lomonosov Moscow State University, Lomonosovsky Prospect 27, Building 10, 119991 Moscow, Russia
| | - Maria Pokrovskaya
- National Research Center for Therapy and Preventive Medicine, Petroverigskiy Lane 10, 101990 Moscow, Russia; (R.M.); (A.M.); (O.K.); (E.S.); (M.D.); (M.K.); (A.Z.); (M.P.); (S.K.); (M.K.); (O.D.)
| | - Sergey Koretskiy
- National Research Center for Therapy and Preventive Medicine, Petroverigskiy Lane 10, 101990 Moscow, Russia; (R.M.); (A.M.); (O.K.); (E.S.); (M.D.); (M.K.); (A.Z.); (M.P.); (S.K.); (M.K.); (O.D.)
| | - Maria Kharlap
- National Research Center for Therapy and Preventive Medicine, Petroverigskiy Lane 10, 101990 Moscow, Russia; (R.M.); (A.M.); (O.K.); (E.S.); (M.D.); (M.K.); (A.Z.); (M.P.); (S.K.); (M.K.); (O.D.)
| | - Elena Mershina
- Medical Research and Educational Center, Lomonosov Moscow State University, Lomonosovsky Prospect 27, Building 10, 119991 Moscow, Russia; (E.M.); (V.S.)
| | - Valentin Sinitsyn
- Medical Research and Educational Center, Lomonosov Moscow State University, Lomonosovsky Prospect 27, Building 10, 119991 Moscow, Russia; (E.M.); (V.S.)
| | - Elena Basargina
- National Medical Research Center for Children’s Health, Lomonosovsky Prospect 2, Building 1, 119991 Moscow, Russia; (E.B.); (L.G.); (V.B.)
| | - Leila Gandaeva
- National Medical Research Center for Children’s Health, Lomonosovsky Prospect 2, Building 1, 119991 Moscow, Russia; (E.B.); (L.G.); (V.B.)
| | - Vladimir Barskiy
- National Medical Research Center for Children’s Health, Lomonosovsky Prospect 2, Building 1, 119991 Moscow, Russia; (E.B.); (L.G.); (V.B.)
| | - Sergey Boytsov
- National Medical Research Center for Cardiology, 3-ya Cherepkovskaya Street, 15A, 121552 Moscow, Russia;
| | - Hendrik Milting
- Erich and Hanna Klessmann Institute, Heart and Diabetes Center NRW, University Hospital of the Ruhr-University Bochum, Georgstrasse 11, 32545 Bad Oeynhausen, Germany; (G.M.P.); (H.M.)
| | - Oxana Drapkina
- National Research Center for Therapy and Preventive Medicine, Petroverigskiy Lane 10, 101990 Moscow, Russia; (R.M.); (A.M.); (O.K.); (E.S.); (M.D.); (M.K.); (A.Z.); (M.P.); (S.K.); (M.K.); (O.D.)
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10
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Fischer B, Dittmann S, Brodehl A, Unger A, Stallmeyer B, Paul M, Seebohm G, Kayser A, Peischard S, Linke WA, Milting H, Schulze-Bahr E. Functional characterization of novel alpha-helical rod domain desmin (DES) pathogenic variants associated with dilated cardiomyopathy, atrioventricular block and a risk for sudden cardiac death. Int J Cardiol 2020; 329:167-174. [PMID: 33373648 DOI: 10.1016/j.ijcard.2020.12.050] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/14/2020] [Revised: 12/02/2020] [Accepted: 12/07/2020] [Indexed: 11/24/2022]
Abstract
BACKGROUND Desmin is the major intermediate filament (IF) protein in human heart and skeletal muscle. So-called 'desminopathies' are disorders due to pathogenic variants in the DES gene and are associated with skeletal myopathies and/or various types of cardiomyopathies. So far, only a limited number of DES pathogenic variants have been identified and functionally characterized. METHODS AND RESULTS Using a Sanger- and next generation sequencing (NGS) approach in patients with various types of cardiomyopathies, we identified two novel, non-synonymous missense DES variants: p.(Ile402Thr) and p.(Glu410Lys). Mutation carriers developed dilated (DCM) or arrhythmogenic cardiomyopathy (ACM), and cardiac conduction disease, leading to spare out the exercise-induced polymorphic ventricular tachycardia; we moved this variant to data in brief. To investigate the functional impact of these four DES variants, transfection experiments using SW-13 and H9c2 cells with native and mutant desmin were performed and filament assembly was analyzed by confocal microscopy. The DES_p.(Ile402Thr) and DES_p.(Glu410Lys) cells showed filament assembly defects forming cytoplasmic desmin aggregates. Furthermore, immunohistochemical and ultrastructural analysis of myocardial tissue from mutation carriers with the DES_p.(Glu410Lys) pathogenic variant supported the in vitro results. CONCLUSIONS Our in vitro results supported the classification of DES_p.(Ile402Thr) and DES_p.(Glu410Lys) as novel pathogenic variants and demonstrated that the cardiac phenotypes associated with DES variants are diverse and cell culture experiments improve in silico analysis and genetic counseling because the pathogenicity of a variant can be clarified.
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Affiliation(s)
- Björn Fischer
- Institute for Genetics of Heart Disease (IfGH), Department of Cardiovascular Medicine, University Hospital Muenster, Muenster, Germany
| | - Sven Dittmann
- Institute for Genetics of Heart Disease (IfGH), Department of Cardiovascular Medicine, University Hospital Muenster, Muenster, Germany.
| | - Andreas Brodehl
- Erich and Hanna Klessmann Institute, Heart and Diabetes Center NRW, University Hospital of the Ruhr-University Bochum, Bad Oeynhausen, Germany
| | - Andreas Unger
- Institute of Physiology II, University of Muenster, Germany
| | - Birgit Stallmeyer
- Institute for Genetics of Heart Disease (IfGH), Department of Cardiovascular Medicine, University Hospital Muenster, Muenster, Germany
| | - Matthias Paul
- Department of Cardiology I, University Hospital Muenster, Muenster, Germany
| | - Guiscard Seebohm
- Institute for Genetics of Heart Disease (IfGH), Department of Cardiovascular Medicine, University Hospital Muenster, Muenster, Germany
| | - Anne Kayser
- Institute for Genetics of Heart Disease (IfGH), Department of Cardiovascular Medicine, University Hospital Muenster, Muenster, Germany
| | - Stefan Peischard
- Institute for Genetics of Heart Disease (IfGH), Department of Cardiovascular Medicine, University Hospital Muenster, Muenster, Germany
| | | | - Hendrik Milting
- Erich and Hanna Klessmann Institute, Heart and Diabetes Center NRW, University Hospital of the Ruhr-University Bochum, Bad Oeynhausen, Germany
| | - Eric Schulze-Bahr
- Institute for Genetics of Heart Disease (IfGH), Department of Cardiovascular Medicine, University Hospital Muenster, Muenster, Germany
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11
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Protonotarios A, Brodehl A, Asimaki A, Jager J, Quinn E, Stanasiuk C, Ratnavadivel S, Futema M, Akhtar MM, Gossios TD, Ashworth M, Savvatis K, Walhorn V, Anselmetti D, Elliott PM, Syrris P, Milting H, Lopes LR. The Novel Desmin Variant p.Leu115Ile Is Associated With a Unique Form of Biventricular Arrhythmogenic Cardiomyopathy. Can J Cardiol 2020; 37:857-866. [PMID: 33290826 DOI: 10.1016/j.cjca.2020.11.017] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2020] [Revised: 11/10/2020] [Accepted: 11/26/2020] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND Arrhythmogenic cardiomyopathy (AC) is a heritable myocardial disorder and a major cause of sudden cardiac death. It is typically caused by mutations in desmosomal genes. Desmin gene (DES) variants have been previously reported in AC but with insufficient evidence to support their pathogenicity. METHODS We aimed to assess a large AC patient cohort for DES mutations and describe a unique phenotype associated with a recurring variant in three families. A cohort of 138 probands with a diagnosis of AC and no identifiable desmosomal gene mutations were prospectively screened by whole-exome sequencing. RESULTS A single DES variant (p.Leu115Ile, c.343C>A) was identified in 3 index patients (2%). We assessed the clinical phenotypes within their families and confirmed cosegregation. One carrier required heart transplantation, 2 died suddenly, and 1 died of noncardiac causes. All cases had right- and left-ventricular (LV) involvement. LV late gadolinium enhancement was present in all, and circumferential subepicardial distribution was confirmed on histology. A significant burden of ventricular arrhythmias was noted. Desmin aggregates were not observed macroscopically, but analysis of the desmin filament formation in transfected cardiomyocytes derived from induced pluripotent stem cells, and SW13 cells revealed cytoplasmic aggregation of mutant desmin. Atomic force microscopy revealed that the mutant form accumulates into short protofilaments and small fibrous aggregates. CONCLUSIONS DES p.Leu115Ile leads to disruption of the desmin filament network and causes a malignant biventricular form of AC, characterized by LV dysfunction and a circumferential subepicardial distribution of myocardial fibrosis.
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Affiliation(s)
- Alexandros Protonotarios
- Institute of Cardiovascular Science, University College London, London, United Kingdom; Inherited Cardiovascular Disease Unit, St Bartholomew's Hospital, London, United Kingdom; William Harvey Research Institute, Queen Mary University of London, London, United Kingdom.
| | - Andreas Brodehl
- Erich and Hanna Klessmann Institute for Cardiovascular Research & Development (EHKI), Heart and Diabetes Center NRW, University Hospital of the Ruhr-University Bochum, Germany
| | - Angeliki Asimaki
- Cardiology Clinical Academic Group, St George's University of London, Cranmer Terrace, London, United Kingdom
| | - Joanna Jager
- Institute of Cardiovascular Science, University College London, London, United Kingdom
| | - Ellie Quinn
- Inherited Cardiovascular Disease Unit, St Bartholomew's Hospital, London, United Kingdom
| | - Caroline Stanasiuk
- Erich and Hanna Klessmann Institute for Cardiovascular Research & Development (EHKI), Heart and Diabetes Center NRW, University Hospital of the Ruhr-University Bochum, Germany
| | - Sandra Ratnavadivel
- Erich and Hanna Klessmann Institute for Cardiovascular Research & Development (EHKI), Heart and Diabetes Center NRW, University Hospital of the Ruhr-University Bochum, Germany
| | - Marta Futema
- Institute of Cardiovascular Science, University College London, London, United Kingdom
| | - Mohammed M Akhtar
- Institute of Cardiovascular Science, University College London, London, United Kingdom; Inherited Cardiovascular Disease Unit, St Bartholomew's Hospital, London, United Kingdom
| | - Thomas D Gossios
- Inherited Cardiovascular Disease Unit, St Bartholomew's Hospital, London, United Kingdom
| | - Michael Ashworth
- Department of Pathology, Great Ormond Street Hospital for Children NHS Foundation Trust, London, United Kingdom
| | - Konstantinos Savvatis
- Institute of Cardiovascular Science, University College London, London, United Kingdom; Inherited Cardiovascular Disease Unit, St Bartholomew's Hospital, London, United Kingdom; William Harvey Research Institute, Queen Mary University of London, London, United Kingdom
| | - Volker Walhorn
- Experimental Biophysics and Applied Nanoscience, Physics Department, Bielefeld Institute for Nanoscience (BINAS), Bielefeld University, Bielefeld, Germany
| | - Dario Anselmetti
- Experimental Biophysics and Applied Nanoscience, Physics Department, Bielefeld Institute for Nanoscience (BINAS), Bielefeld University, Bielefeld, Germany
| | - Perry M Elliott
- Institute of Cardiovascular Science, University College London, London, United Kingdom; Inherited Cardiovascular Disease Unit, St Bartholomew's Hospital, London, United Kingdom
| | - Petros Syrris
- Institute of Cardiovascular Science, University College London, London, United Kingdom
| | - Hendrik Milting
- Erich and Hanna Klessmann Institute for Cardiovascular Research & Development (EHKI), Heart and Diabetes Center NRW, University Hospital of the Ruhr-University Bochum, Germany
| | - Luis R Lopes
- Institute of Cardiovascular Science, University College London, London, United Kingdom; Inherited Cardiovascular Disease Unit, St Bartholomew's Hospital, London, United Kingdom
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12
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Gaertner A, Klauke B, Felski E, Kassner A, Brodehl A, Gerdes D, Stanasiuk C, Ebbinghaus H, Schulz U, Dubowy KO, Tiesmeier J, Laser KT, Bante H, Bergau L, Sommer P, Fox H, Morshuis M, Gummert J, Milting H. Cardiomyopathy-associated mutations in the RS domain affect nuclear localization of RBM20. Hum Mutat 2020; 41:1931-1943. [PMID: 32840935 DOI: 10.1002/humu.24096] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2019] [Revised: 08/06/2020] [Accepted: 08/19/2020] [Indexed: 12/30/2022]
Abstract
Mutations in RBM20 encoding the RNA-binding motif protein 20 (RBM20) are associated with an early onset and clinically severe forms of cardiomyopathies. Transcriptome analyses revealed RBM20 as an important regulator of cardiac alternative splicing. RBM20 mutations are especially localized in exons 9 and 11 including the highly conserved arginine and serine-rich domain (RS domain). Here, we investigated in several cardiomyopathy patients, the previously described RBM20-mutation p.Pro638Leu localized within the RS domain. In addition, we identified in a patient the novel mutation p.Val914Ala localized in the (glutamate-rich) Glu-rich domain of RBM20 encoded by exon 11. Its impact on the disease was investigated with a novel TTN- and RYR2-splicing assay based on the patients' cardiac messenger RNA. Furthermore, we showed in cell culture and in human cardiac tissue that mutant RBM20-p.Pro638Leu is not localized in the nuclei but causes an abnormal cytoplasmic localization of the protein. In contrast the splicing deficient RBM20-p.Val914Ala has no influence on the intracellular localization. These results indicate that disease-associated variants in RBM20 lead to aberrant splicing through different pathomechanisms dependent on the localization of the mutation. This might have an impact on the future development of therapeutic strategies for the treatment of RBM20-induced cardiomyopathies.
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Affiliation(s)
- Anna Gaertner
- Herz- und Diabeteszentrum NRW, Universitätsklinikum der Ruhr-Universität Bochum, Bad Oeynhausen, Germany
- Klinik für Thorax- und Kardiovaskularchirurgie, Erich und Hanna Klessmann-Institut für Kardiovaskuläre Forschung und Entwicklung, Bad Oeynhausen, Germany
| | - Baerbel Klauke
- Herz- und Diabeteszentrum NRW, Universitätsklinikum der Ruhr-Universität Bochum, Bad Oeynhausen, Germany
- Klinik für Thorax- und Kardiovaskularchirurgie, Erich und Hanna Klessmann-Institut für Kardiovaskuläre Forschung und Entwicklung, Bad Oeynhausen, Germany
| | - Elina Felski
- Herz- und Diabeteszentrum NRW, Universitätsklinikum der Ruhr-Universität Bochum, Bad Oeynhausen, Germany
- Klinik für Thorax- und Kardiovaskularchirurgie, Erich und Hanna Klessmann-Institut für Kardiovaskuläre Forschung und Entwicklung, Bad Oeynhausen, Germany
| | - Astrid Kassner
- Herz- und Diabeteszentrum NRW, Universitätsklinikum der Ruhr-Universität Bochum, Bad Oeynhausen, Germany
- Klinik für Thorax- und Kardiovaskularchirurgie, Erich und Hanna Klessmann-Institut für Kardiovaskuläre Forschung und Entwicklung, Bad Oeynhausen, Germany
| | - Andreas Brodehl
- Herz- und Diabeteszentrum NRW, Universitätsklinikum der Ruhr-Universität Bochum, Bad Oeynhausen, Germany
- Klinik für Thorax- und Kardiovaskularchirurgie, Erich und Hanna Klessmann-Institut für Kardiovaskuläre Forschung und Entwicklung, Bad Oeynhausen, Germany
| | - Désirée Gerdes
- Herz- und Diabeteszentrum NRW, Universitätsklinikum der Ruhr-Universität Bochum, Bad Oeynhausen, Germany
- Klinik für Thorax- und Kardiovaskularchirurgie, Erich und Hanna Klessmann-Institut für Kardiovaskuläre Forschung und Entwicklung, Bad Oeynhausen, Germany
| | - Caroline Stanasiuk
- Herz- und Diabeteszentrum NRW, Universitätsklinikum der Ruhr-Universität Bochum, Bad Oeynhausen, Germany
- Klinik für Thorax- und Kardiovaskularchirurgie, Erich und Hanna Klessmann-Institut für Kardiovaskuläre Forschung und Entwicklung, Bad Oeynhausen, Germany
| | - Hans Ebbinghaus
- Herz- und Diabeteszentrum NRW, Universitätsklinikum der Ruhr-Universität Bochum, Bad Oeynhausen, Germany
- Klinik für Thorax- und Kardiovaskularchirurgie, Erich und Hanna Klessmann-Institut für Kardiovaskuläre Forschung und Entwicklung, Bad Oeynhausen, Germany
| | - Uwe Schulz
- Herz- und Diabeteszentrum NRW, Universitätsklinikum der Ruhr-Universität Bochum, Bad Oeynhausen, Germany
- Klinik für Thorax- und Kardiovaskularchirurgie, Erich und Hanna Klessmann-Institut für Kardiovaskuläre Forschung und Entwicklung, Bad Oeynhausen, Germany
| | - Karl-Otto Dubowy
- Herz- und Diabeteszentrum NRW, Universitätsklinikum der Ruhr-Universität Bochum, Bad Oeynhausen, Germany
- Kinderherzzentrum und Zentrum für Angeborene Herzfehler, Bad Oeynhausen, Germany
| | - Jens Tiesmeier
- Herz- und Diabeteszentrum NRW, Universitätsklinikum der Ruhr-Universität Bochum, Bad Oeynhausen, Germany
- Klinik für Thorax- und Kardiovaskularchirurgie, Erich und Hanna Klessmann-Institut für Kardiovaskuläre Forschung und Entwicklung, Bad Oeynhausen, Germany
| | - Kai-Thorsten Laser
- Herz- und Diabeteszentrum NRW, Universitätsklinikum der Ruhr-Universität Bochum, Bad Oeynhausen, Germany
- Kinderherzzentrum und Zentrum für Angeborene Herzfehler, Bad Oeynhausen, Germany
| | - Hendrik Bante
- Herz- und Diabeteszentrum NRW, Universitätsklinikum der Ruhr-Universität Bochum, Bad Oeynhausen, Germany
- Klinik für Elektrophysiologie/Rhythmologie, Bad Oeynhausen, Germany
| | - Leonard Bergau
- Herz- und Diabeteszentrum NRW, Universitätsklinikum der Ruhr-Universität Bochum, Bad Oeynhausen, Germany
- Klinik für Elektrophysiologie/Rhythmologie, Bad Oeynhausen, Germany
| | - Philipp Sommer
- Herz- und Diabeteszentrum NRW, Universitätsklinikum der Ruhr-Universität Bochum, Bad Oeynhausen, Germany
- Klinik für Elektrophysiologie/Rhythmologie, Bad Oeynhausen, Germany
| | - Henrik Fox
- Herz- und Diabeteszentrum NRW, Universitätsklinikum der Ruhr-Universität Bochum, Bad Oeynhausen, Germany
- Klinik für Thorax- und Kardiovaskularchirurgie, Erich und Hanna Klessmann-Institut für Kardiovaskuläre Forschung und Entwicklung, Bad Oeynhausen, Germany
| | - Michiel Morshuis
- Herz- und Diabeteszentrum NRW, Universitätsklinikum der Ruhr-Universität Bochum, Bad Oeynhausen, Germany
- Klinik für Thorax- und Kardiovaskularchirurgie, Erich und Hanna Klessmann-Institut für Kardiovaskuläre Forschung und Entwicklung, Bad Oeynhausen, Germany
| | - Jan Gummert
- Herz- und Diabeteszentrum NRW, Universitätsklinikum der Ruhr-Universität Bochum, Bad Oeynhausen, Germany
- Klinik für Thorax- und Kardiovaskularchirurgie, Erich und Hanna Klessmann-Institut für Kardiovaskuläre Forschung und Entwicklung, Bad Oeynhausen, Germany
| | - Hendrik Milting
- Herz- und Diabeteszentrum NRW, Universitätsklinikum der Ruhr-Universität Bochum, Bad Oeynhausen, Germany
- Klinik für Thorax- und Kardiovaskularchirurgie, Erich und Hanna Klessmann-Institut für Kardiovaskuläre Forschung und Entwicklung, Bad Oeynhausen, Germany
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Abstract
Arrhythmogenic cardiomyopathy has been clinically defined since the 1980s and causes right or biventricular cardiomyopathy associated with ventricular arrhythmia. Although it is a rare cardiac disease, it is responsible for a significant proportion of sudden cardiac deaths, especially in athletes. The majority of patients with arrhythmogenic cardiomyopathy carry one or more genetic variants in desmosomal genes. In the 1990s, several knockout mouse models of genes encoding for desmosomal proteins involved in cell-cell adhesion revealed for the first time embryonic lethality due to cardiac defects. Influenced by these initial discoveries in mice, arrhythmogenic cardiomyopathy received an increasing interest in human cardiovascular genetics, leading to the discovery of mutations initially in desmosomal genes and later on in more than 25 different genes. Of note, even in the clinic, routine genetic diagnostics are important for risk prediction of patients and their relatives with arrhythmogenic cardiomyopathy. Based on improvements in genetic animal engineering, different transgenic, knock-in, or cardiac-specific knockout animal models for desmosomal and nondesmosomal proteins have been generated, leading to important discoveries in this field. Here, we present an overview about the existing animal models of arrhythmogenic cardiomyopathy with a focus on the underlying pathomechanism and its importance for understanding of this disease. Prospectively, novel mechanistic insights gained from the whole animal, organ, tissue, cellular, and molecular levels will lead to the development of efficient personalized therapies for treatment of arrhythmogenic cardiomyopathy.
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Affiliation(s)
- Brenda Gerull
- Comprehensive Heart Failure Center Wuerzburg, Department of Internal Medicine I, University Hospital Würzburg, Würzburg, Germany.,Department of Cardiac Sciences, Libin Cardiovascular Institute of Alberta, University of Calgary, Calgary, AB, Canada
| | - Andreas Brodehl
- Erich and Hanna Klessmann Institute for Cardiovascular Research and Development, Heart and Diabetes Center NRW, University Hospitals of the Ruhr-University of Bochum, Bad Oeynhausen, Germany
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14
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Brodehl A, Weiss J, Debus JD, Stanasiuk C, Klauke B, Deutsch MA, Fox H, Bax J, Ebbinghaus H, Gärtner A, Tiesmeier J, Laser T, Peterschröder A, Gerull B, Gummert J, Paluszkiewicz L, Milting H. A homozygous DSC2 deletion associated with arrhythmogenic cardiomyopathy is caused by uniparental isodisomy. J Mol Cell Cardiol 2020; 141:17-29. [PMID: 32201174 DOI: 10.1016/j.yjmcc.2020.03.006] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/24/2019] [Revised: 02/27/2020] [Accepted: 03/18/2020] [Indexed: 12/21/2022]
Abstract
AIMS We aimed to unravel the genetic, molecular and cellular pathomechanisms of DSC2 truncation variants leading to arrhythmogenic cardiomyopathy (ACM). METHODS AND RESULTS We report a homozygous 4-bp DSC2 deletion variant c.1913_1916delAGAA, p.Q638LfsX647hom causing a frameshift carried by an ACM patient. Whole exome sequencing and comparative genomic hybridization analysis support a loss of heterozygosity in a large segment of chromosome 18 indicating segmental interstitial uniparental isodisomy (UPD). Ultrastructural analysis of the explanted myocardium from a mutation carrier using transmission electron microscopy revealed a partially widening of the intercalated disc. Using qRT-PCR we demonstrated that DSC2 mRNA expression was substantially decreased in the explanted myocardial tissue of the homozygous carrier compared to controls. Western blot analysis revealed absence of both full-length desmocollin-2 isoforms. Only a weak expression of the truncated form of desmocollin-2 was detectable. Immunohistochemistry showed that the truncated form of desmocollin-2 did not localize at the intercalated discs. In vitro, transfection experiments using induced pluripotent stem cell derived cardiomyocytes and HT-1080 cells demonstrated an obvious absence of the mutant truncated desmocollin-2 at the plasma membrane. Immunoprecipitation in combination with fluorescence measurements and Western blot analyses revealed an abnormal secretion of the truncated desmocollin-2. CONCLUSION In summary, we unraveled segmental UPD as the likely genetic reason for a small homozygous DSC2 deletion. We conclude that a combination of nonsense mediated mRNA decay and extracellular secretion is involved in DSC2 related ACM.
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Affiliation(s)
- Andreas Brodehl
- Erich and Hanna Klessmann Institute for Cardiovascular Research & Development (EHKI), Heart and Diabetes Center NRW, University Hospital of the Ruhr-University Bochum, Georgstrasse 11, 32545 Bad Oeynhausen, Germany.
| | - Jürgen Weiss
- Institute for Clinical Biochemistry and Pathobiochemistry, Cellular Morphology, German Diabetes Center, Auf'm Hennekamp 65, 40225 Düsseldorf, Germany
| | - Jana Davina Debus
- Erich and Hanna Klessmann Institute for Cardiovascular Research & Development (EHKI), Heart and Diabetes Center NRW, University Hospital of the Ruhr-University Bochum, Georgstrasse 11, 32545 Bad Oeynhausen, Germany
| | - Caroline Stanasiuk
- Erich and Hanna Klessmann Institute for Cardiovascular Research & Development (EHKI), Heart and Diabetes Center NRW, University Hospital of the Ruhr-University Bochum, Georgstrasse 11, 32545 Bad Oeynhausen, Germany
| | - Bärbel Klauke
- Erich and Hanna Klessmann Institute for Cardiovascular Research & Development (EHKI), Heart and Diabetes Center NRW, University Hospital of the Ruhr-University Bochum, Georgstrasse 11, 32545 Bad Oeynhausen, Germany
| | - Marcus André Deutsch
- Department of Cardio-Thoracic Surgery, Heart and Diabetes Center NRW, University Hospital of the Ruhr-University Bochum, Georgstrasse 11, 32545 Bad Oeynhausen, Germany
| | - Henrik Fox
- Department of Cardio-Thoracic Surgery, Heart and Diabetes Center NRW, University Hospital of the Ruhr-University Bochum, Georgstrasse 11, 32545 Bad Oeynhausen, Germany
| | - Jördis Bax
- Erich and Hanna Klessmann Institute for Cardiovascular Research & Development (EHKI), Heart and Diabetes Center NRW, University Hospital of the Ruhr-University Bochum, Georgstrasse 11, 32545 Bad Oeynhausen, Germany
| | - Hans Ebbinghaus
- Erich and Hanna Klessmann Institute for Cardiovascular Research & Development (EHKI), Heart and Diabetes Center NRW, University Hospital of the Ruhr-University Bochum, Georgstrasse 11, 32545 Bad Oeynhausen, Germany
| | - Anna Gärtner
- Erich and Hanna Klessmann Institute for Cardiovascular Research & Development (EHKI), Heart and Diabetes Center NRW, University Hospital of the Ruhr-University Bochum, Georgstrasse 11, 32545 Bad Oeynhausen, Germany
| | - Jens Tiesmeier
- Hospital Luebbecke-Rhaden, Muehlenkreis Hospitalsd, Medical-Campus OWL of the Ruhr-University Bochum, Virchowstr. 65, 32132 Luebbecke, Germany
| | - Thorsten Laser
- Center for Congenital Heart Defects, Heart and Diabetes Center NRW, University Hospital of the Ruhr-University Bochum, Georgstrasse 11, 32545 Bad Oeynhausen, Germany
| | - Andreas Peterschröder
- Institute for Radiology, Nuclear Medicine and Molecular Imaging, Heart and Diabetes Center NRW, University Hospital of the Ruhr-University Bochum, Georgstrasse 11, 32545 Bad Oeynhausen, Germany
| | - Brenda Gerull
- Department of Cardiac Sciences, Libin Cardiovascular Institute of Alberta, University of Calgary, Calgary, Alberta, Canada; Comprehensive Heart Failure Center and Department of Internal Medicine I, University Hospital Würzburg, Germany
| | - Jan Gummert
- Erich and Hanna Klessmann Institute for Cardiovascular Research & Development (EHKI), Heart and Diabetes Center NRW, University Hospital of the Ruhr-University Bochum, Georgstrasse 11, 32545 Bad Oeynhausen, Germany; Department of Cardio-Thoracic Surgery, Heart and Diabetes Center NRW, University Hospital of the Ruhr-University Bochum, Georgstrasse 11, 32545 Bad Oeynhausen, Germany
| | - Lech Paluszkiewicz
- Department of Cardio-Thoracic Surgery, Heart and Diabetes Center NRW, University Hospital of the Ruhr-University Bochum, Georgstrasse 11, 32545 Bad Oeynhausen, Germany
| | - Hendrik Milting
- Erich and Hanna Klessmann Institute for Cardiovascular Research & Development (EHKI), Heart and Diabetes Center NRW, University Hospital of the Ruhr-University Bochum, Georgstrasse 11, 32545 Bad Oeynhausen, Germany.
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15
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Affiliation(s)
- Anna Gaertner
- Heart and Diabetes Center NRWUniversity Hospital of the Ruhr‐University Bochum, Clinic of Thoracic and Cardiovascular Surgery, Erich and Hanna Klessmann Institute for Cardiovascular Research and DevelopmentGeorgstrasse 11D‐32545Bad OeynhausenGermany
| | - Bärbel Klauke
- Heart and Diabetes Center NRWUniversity Hospital of the Ruhr‐University Bochum, Clinic of Thoracic and Cardiovascular Surgery, Erich and Hanna Klessmann Institute for Cardiovascular Research and DevelopmentGeorgstrasse 11D‐32545Bad OeynhausenGermany
| | - Andreas Brodehl
- Heart and Diabetes Center NRWUniversity Hospital of the Ruhr‐University Bochum, Clinic of Thoracic and Cardiovascular Surgery, Erich and Hanna Klessmann Institute for Cardiovascular Research and DevelopmentGeorgstrasse 11D‐32545Bad OeynhausenGermany
| | - Hendrik Milting
- Heart and Diabetes Center NRWUniversity Hospital of the Ruhr‐University Bochum, Clinic of Thoracic and Cardiovascular Surgery, Erich and Hanna Klessmann Institute for Cardiovascular Research and DevelopmentGeorgstrasse 11D‐32545Bad OeynhausenGermany
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16
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Affiliation(s)
- Anna Gaertner
- Erich and Hanna Klessmann Institute, Heart and Diabetes Center NRW, University Hospital of the Ruhr-University Bochum, Georgstrasse 11, 32545, Bad Oeynhausen, Germany.
| | - Andreas Brodehl
- Erich and Hanna Klessmann Institute, Heart and Diabetes Center NRW, University Hospital of the Ruhr-University Bochum, Georgstrasse 11, 32545, Bad Oeynhausen, Germany
| | - Hendrik Milting
- Erich and Hanna Klessmann Institute, Heart and Diabetes Center NRW, University Hospital of the Ruhr-University Bochum, Georgstrasse 11, 32545, Bad Oeynhausen, Germany.
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17
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Brodehl A, Ebbinghaus H, Deutsch MA, Gummert J, Gärtner A, Ratnavadivel S, Milting H. Human Induced Pluripotent Stem-Cell-Derived Cardiomyocytes as Models for Genetic Cardiomyopathies. Int J Mol Sci 2019; 20:ijms20184381. [PMID: 31489928 PMCID: PMC6770343 DOI: 10.3390/ijms20184381] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2019] [Revised: 08/29/2019] [Accepted: 09/03/2019] [Indexed: 12/17/2022] Open
Abstract
In the last few decades, many pathogenic or likely pathogenic genetic mutations in over hundred different genes have been described for non-ischemic, genetic cardiomyopathies. However, the functional knowledge about most of these mutations is still limited because the generation of adequate animal models is time-consuming and challenging. Therefore, human induced pluripotent stem cells (iPSCs) carrying specific cardiomyopathy-associated mutations are a promising alternative. Since the original discovery that pluripotency can be artificially induced by the expression of different transcription factors, various patient-specific-induced pluripotent stem cell lines have been generated to model non-ischemic, genetic cardiomyopathies in vitro. In this review, we describe the genetic landscape of non-ischemic, genetic cardiomyopathies and give an overview about different human iPSC lines, which have been developed for the disease modeling of inherited cardiomyopathies. We summarize different methods and protocols for the general differentiation of human iPSCs into cardiomyocytes. In addition, we describe methods and technologies to investigate functionally human iPSC-derived cardiomyocytes. Furthermore, we summarize novel genome editing approaches for the genetic manipulation of human iPSCs. This review provides an overview about the genetic landscape of inherited cardiomyopathies with a focus on iPSC technology, which might be of interest for clinicians and basic scientists interested in genetic cardiomyopathies.
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Affiliation(s)
- Andreas Brodehl
- Erich and Hanna Klessmann Institute, Heart and Diabetes Center NRW, University Hospital of the Ruhr-University Bochum, Georgstrasse 11, D-32545 Bad Oeynhausen, Germany.
| | - Hans Ebbinghaus
- Erich and Hanna Klessmann Institute, Heart and Diabetes Center NRW, University Hospital of the Ruhr-University Bochum, Georgstrasse 11, D-32545 Bad Oeynhausen, Germany.
| | - Marcus-André Deutsch
- Department of Thoracic and Cardiovascular Surgery, Heart and Diabetes Center NRW, University Hospital Ruhr-University Bochum, Georgstrasse 11, D-32545 Bad Oeynhausen, Germany.
| | - Jan Gummert
- Erich and Hanna Klessmann Institute, Heart and Diabetes Center NRW, University Hospital of the Ruhr-University Bochum, Georgstrasse 11, D-32545 Bad Oeynhausen, Germany.
- Department of Thoracic and Cardiovascular Surgery, Heart and Diabetes Center NRW, University Hospital Ruhr-University Bochum, Georgstrasse 11, D-32545 Bad Oeynhausen, Germany.
| | - Anna Gärtner
- Erich and Hanna Klessmann Institute, Heart and Diabetes Center NRW, University Hospital of the Ruhr-University Bochum, Georgstrasse 11, D-32545 Bad Oeynhausen, Germany.
| | - Sandra Ratnavadivel
- Erich and Hanna Klessmann Institute, Heart and Diabetes Center NRW, University Hospital of the Ruhr-University Bochum, Georgstrasse 11, D-32545 Bad Oeynhausen, Germany.
| | - Hendrik Milting
- Erich and Hanna Klessmann Institute, Heart and Diabetes Center NRW, University Hospital of the Ruhr-University Bochum, Georgstrasse 11, D-32545 Bad Oeynhausen, Germany.
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18
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Boogerd CJ, Lacraz GP, Vértesy Á, Perini I, de Ruiter H, Brodehl A, van der Kraak P, Huibers M, de Jonge N, Junker JP, Vink A, van Rooij E. Abstract 510: Spatial Transcriptomics Unveil ZBTB11 as a Regulator of Cardiomyocyte Degeneration in Arrhythmogenic Cardiomyopathy. Circ Res 2019. [DOI: 10.1161/res.125.suppl_1.510] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Introduction:
Arrhythmogenic cardiomyopathy (ACM) is an inherited cardiac disorder characterized by progressive loss of contractile myocardium which is replaced by fibrous and adipose tissue, ventricular arrhythmias, and sudden cardiac death. Fibrofatty replacement extends transmurally with an epi-to-endocardial gradient, yet molecular differences between the transition regions are poorly characterized.
Methods and Results:
To explore molecular mechanisms underlying ACM we obtained an explanted heart of a 35-year-old male with a known pathogenic
PKP2
mutation, c.2544G>A. We utilized Tomo-Seq to acquire a genome-wide transcriptional profile with 100μm-spatial resolution, generating a transmural expression atlas of the ACM heart. Tracing transcriptional differences across the ventricular wall enabled us to identify clusters of genes specific to the myocardium and fibrofatty region. In addition, we detected restricted sites of active remodelling within the myocardium with a clearly distinct gene program. Amongst genes specifically enriched in this composite region was the Zinc Finger and BTB Domain-Containing Protein 11 (ZBTB11). Overexpression of ZBTB11 in human cardiomyocytes induced a differential gene expression profile with striking similarities to the composite region from the Tomo-Seq analysis. Most notably, ZBTB11 induced a TP53 mediated stress response including activation of apoptosis and autophagy. The presence of ZBTB11-positive cardiomyocytes flanking fibrofatty islands was confirmed in ACM patients harbouring other
PKP2
mutations, as well as ACM and DCM hearts with mutations in non-desmosomal genes. We are currently exploring the ZBTB11 transcriptional network, and its role in disease progression in human cardiomyopathies.
Conclusions:
Using a spatial transcriptomics approach on a human ACM heart we have identified ZBTB11 as a novel marker of cardiomyocyte degeneration in cardiomyopathies. ZBTB11 induces autophagy and apoptosis and therefore may be relevant for the development of biomarker assays and in identifying novel targets for therapies against cardiomyopathies.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | - Aryan Vink
- Univ Med Cntr Utrecht, Utrecht, Netherlands
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19
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Affiliation(s)
- Andreas Brodehl
- From the Erich and Hanna Klessmann Institute for Cardiovascular Research and Development, Heart and Diabetes Center North Rhine-Westphalia, University Hospital of the Ruhr University of Bochum, Bad Oeynhausen, Germany.
| | - Anna Gaertner-Rommel
- From the Erich and Hanna Klessmann Institute for Cardiovascular Research and Development, Heart and Diabetes Center North Rhine-Westphalia, University Hospital of the Ruhr University of Bochum, Bad Oeynhausen, Germany
| | - Hendrik Milting
- From the Erich and Hanna Klessmann Institute for Cardiovascular Research and Development, Heart and Diabetes Center North Rhine-Westphalia, University Hospital of the Ruhr University of Bochum, Bad Oeynhausen, Germany
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20
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Brodehl A, Rezazadeh S, Williams T, Munsie NM, Liedtke D, Oh T, Ferrier R, Shen Y, Jones SJM, Stiegler AL, Boggon TJ, Duff HJ, Friedman JM, Gibson WT, Childs SJ, Gerull B. Mutations in ILK, encoding integrin-linked kinase, are associated with arrhythmogenic cardiomyopathy. Transl Res 2019; 208:15-29. [PMID: 30802431 PMCID: PMC7412573 DOI: 10.1016/j.trsl.2019.02.004] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/07/2018] [Revised: 01/17/2019] [Accepted: 02/12/2019] [Indexed: 12/11/2022]
Abstract
Arrhythmogenic cardiomyopathy is a genetic heart muscle disorder characterized by fibro-fatty replacement of cardiomyocytes leading to life-threatening ventricular arrhythmias, heart failure, and sudden cardiac death. Mutations in genes encoding cardiac junctional proteins are known to cause about half of cases, while remaining genetic causes are unknown. Using exome sequencing, we identified 2 missense variants (p.H33N and p.H77Y) that were predicted to be damaging in the integrin-linked kinase (ILK) gene in 2 unrelated families. The p.H33N variant was found to be de novo. ILK links integrins and the actin cytoskeleton, and is essential for the maintenance of normal cardiac function. Both of the new variants are located in the ILK ankyrin repeat domain, which binds to the first LIM domain of the adaptor proteins PINCH1 and PINCH2. In silico binding studies proposed that the human variants disrupt the ILK-PINCH complex. Recombinant mutant ILK expressed in H9c2 rat myoblast cells shows aberrant prominent cytoplasmic localization compared to the wild-type. Expression of human wild-type and mutant ILK under the control of the cardiac-specific cmlc2 promotor in zebrafish shows that p.H77Y and p.P70L, a variant previously reported in a dilated cardiomyopathy family, cause cardiac dysfunction and death by about 2-3 weeks of age. Our findings provide genetic and functional evidence that ILK is a cardiomyopathy disease gene and highlight its relevance for diagnosis and genetic counseling of inherited cardiomyopathies.
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Affiliation(s)
- Andreas Brodehl
- Department of Cardiac Sciences, Libin Cardiovascular Institute of Alberta, University of Calgary, Calgary, Alberta, Canada
| | - Saman Rezazadeh
- Department of Cardiac Sciences, Libin Cardiovascular Institute of Alberta, University of Calgary, Calgary, Alberta, Canada
| | - Tatjana Williams
- Comprehensive Heart Failure Center and Department of Internal Medicine I, University Hospital Würzburg, Würzburg, Germany
| | - Nicole M Munsie
- Department of Biochemistry and Molecular Biology, Alberta Children's Hospital Research Institute, University of Calgary, Calgary, Alberta, Canada
| | - Daniel Liedtke
- Institute of Human Genetics, Julius-Maximilians-Universität Würzburg, Würzburg, Germany
| | - Tracey Oh
- Department of Medical Genetics, University of British Columbia, Vancouver, British Columbia, Canada
| | - Raechel Ferrier
- Department of Medical Genetics, Alberta Health Services, Calgary, Alberta, Canada
| | - Yaoqing Shen
- Canada's Michael Smith Genome Sciences Centre, Vancouver, British Columbia, Canada
| | - Steven J M Jones
- Canada's Michael Smith Genome Sciences Centre, Vancouver, British Columbia, Canada
| | - Amy L Stiegler
- Department of Pharmacology, Yale University School of Medicine, New Haven, Connecticut, USA
| | - Titus J Boggon
- Department of Pharmacology, Yale University School of Medicine, New Haven, Connecticut, USA
| | - Henry J Duff
- Department of Cardiac Sciences, Libin Cardiovascular Institute of Alberta, University of Calgary, Calgary, Alberta, Canada
| | - Jan M Friedman
- Department of Medical Genetics, University of British Columbia, Vancouver, British Columbia, Canada
| | - William T Gibson
- Department of Medical Genetics, University of British Columbia, Vancouver, British Columbia, Canada; BC Children's Hospital Research Institute, Vancouver, British Columbia, Canada
| | | | - Sarah J Childs
- Department of Biochemistry and Molecular Biology, Alberta Children's Hospital Research Institute, University of Calgary, Calgary, Alberta, Canada
| | - Brenda Gerull
- Department of Cardiac Sciences, Libin Cardiovascular Institute of Alberta, University of Calgary, Calgary, Alberta, Canada; Comprehensive Heart Failure Center and Department of Internal Medicine I, University Hospital Würzburg, Würzburg, Germany.
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Marakhonov AV, Brodehl A, Myasnikov RP, Sparber PA, Kiseleva AV, Kulikova OV, Meshkov AN, Zharikova AA, Koretsky SN, Kharlap MS, Stanasiuk C, Mershina EA, Sinitsyn VE, Shevchenko AO, Mozheyko NP, Drapkina OM, Boytsov SA, Milting H, Skoblov MY. Back Cover, Volume 40, Issue 6. Hum Mutat 2019. [DOI: 10.1002/humu.23796] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Andrey V. Marakhonov
- Laboratory of Genetic EpidemiologyResearch Centre for Medical Genetics (RCMG)Moscow Russia
- School of BiomedicineFar Eastern Federal UniversityVladivostok Russia
| | - Andreas Brodehl
- Erich and Hanna Klessmann Institute, Heart and Diabetes Centre NRWUniversity Hospital of the Ruhr‐University BochumBad Oeynhausen Germany
| | - Roman P. Myasnikov
- Department of Clinical Cardiology and Molecular GeneticsFederal State Institution National Center for Preventive MedicineMoscow Russia
| | - Peter A. Sparber
- School of BiomedicineFar Eastern Federal UniversityVladivostok Russia
| | - Anna V. Kiseleva
- Laboratory of Molecular GeneticsFederal State Institution National Center for Preventive MedicineMoscow Russia
| | - Olga V. Kulikova
- Department of Clinical Cardiology and Molecular GeneticsFederal State Institution National Center for Preventive MedicineMoscow Russia
| | - Alexey N. Meshkov
- Department of Molecular and Cellular GeneticsPirogov Russian National Research Medical UniversityMoscow Russia
- Laboratory of Molecular GeneticsFederal State Institution National Center for Preventive MedicineMoscow Russia
| | - Anastasia A. Zharikova
- M.V. Lomonosov Moscow State UniversityMoscow Russia
- Laboratory of Molecular GeneticsFederal State Institution National Center for Preventive MedicineMoscow Russia
| | - Serguey N. Koretsky
- Department of Fundamental and Applied Aspects of ObesityFederal State Institution National Center for Preventive MedicineMoscow Russia
| | - Maria S. Kharlap
- Cardiac Arrhythmias DepartmentFederal State Institution National Center for Preventive MedicineMoscow Russia
| | - Caroline Stanasiuk
- Erich and Hanna Klessmann Institute, Heart and Diabetes Centre NRWUniversity Hospital of the Ruhr‐University BochumBad Oeynhausen Germany
| | - Elena A. Mershina
- M.V. Lomonosov Moscow State UniversityMoscow Russia
- Radiology DepartmentLomonosov Moscow State University Medical Research and Educational CenterMoscow Russia
| | - Valentin E. Sinitsyn
- M.V. Lomonosov Moscow State UniversityMoscow Russia
- Radiology DepartmentLomonosov Moscow State University Medical Research and Educational CenterMoscow Russia
| | - Alexey O. Shevchenko
- Department of Critical Care Translational MedicineV.I. Shumakov National Medical Research Center of Transplantology and Artificial OrgansMoscow Russia
| | - Natalia P. Mozheyko
- Pathology DepartmentV.I. Shumakov National Medical Research Center of Transplantology and Artificial OrgansMoscow Russia
| | - Oksana M. Drapkina
- Department of Fundamental and Applied Aspects of ObesityFederal State Institution National Center for Preventive MedicineMoscow Russia
| | | | - Hendrik Milting
- Erich and Hanna Klessmann Institute, Heart and Diabetes Centre NRWUniversity Hospital of the Ruhr‐University BochumBad Oeynhausen Germany
| | - Mikhail Yu. Skoblov
- Laboratory of Functional GenomicsResearch Centre for Medical Genetics (RCMG)Moscow Russia Russia
- School of BiomedicineFar Eastern Federal UniversityVladivostok Russia
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Brodehl A, Ebbinghaus H, Gaertner-Rommel A, Stanasiuk C, Klauke B, Milting H. Functional analysis of DES-p.L398P and RBM20-p.R636C. Genet Med 2019; 21:1246-1247. [DOI: 10.1038/s41436-018-0291-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2018] [Accepted: 08/17/2018] [Indexed: 12/22/2022] Open
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Marakhonov AV, Brodehl A, Myasnikov RP, Sparber PA, Kiseleva AV, Kulikova OV, Meshkov AN, Zharikova AA, Koretsky SN, Kharlap MS, Stanasiuk C, Mershina EA, Sinitsyn VE, Shevchenko AO, Mozheyko NP, Drapkina OM, Boytsov SA, Milting H, Skoblov MY. Noncompaction cardiomyopathy is caused by a novel in-frame desmin (DES) deletion mutation within the 1A coiled-coil rod segment leading to a severe filament assembly defect. Hum Mutat 2019; 40:734-741. [PMID: 30908796 DOI: 10.1002/humu.23747] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2018] [Revised: 03/03/2019] [Accepted: 03/06/2019] [Indexed: 11/07/2022]
Abstract
Mutations in DES, encoding desmin protein, are associated with different kinds of skeletal and/or cardiac myopathies. However, it is unknown, whether DES mutations are associated with left ventricular hypertrabeculation (LVHT). Here, we performed a clinical examination and subsequent genetic analysis in a family, with two individuals presenting LVHT with conduction disease and skeletal myopathy. The genetic analysis revealed a novel small in-frame deletion within the DES gene, p.Q113_L115del, affecting the α-helical rod domain. Immunohistochemistry analysis of explanted myocardial tissue from the index patient revealed an abnormal cytoplasmic accumulation of desmin and a degraded sarcomeric structure. Cell transfection experiments with wild-type and mutant desmin verified the cytoplasmic aggregation and accumulation of mutant desmin. Cotransfection experiments were performed to model the heterozygous state of the patients and revealed a dominant negative effect of the mutant desmin on filament assembly. DES:p.Q113_L115del is classified as a pathogenic mutation associated with dilated cardiomyopathy with prominent LVHT.
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Affiliation(s)
- Andrey V Marakhonov
- Laboratory of Genetic Epidemiology, Research Centre for Medical Genetics (RCMG), Moscow, Russia.,School of Biomedicine, Far Eastern Federal University, Vladivostok, Russia
| | - Andreas Brodehl
- Erich and Hanna Klessmann Institute, Heart and Diabetes Centre NRW, University Hospital of the Ruhr-University Bochum, Bad Oeynhausen, Germany
| | - Roman P Myasnikov
- Department of Clinical Cardiology and Molecular Genetics, Federal State Institution National Center for Preventive Medicine, Moscow, Russia
| | - Peter A Sparber
- School of Biomedicine, Far Eastern Federal University, Vladivostok, Russia
| | - Anna V Kiseleva
- Laboratory of Molecular Genetics, Federal State Institution National Center for Preventive Medicine, Moscow, Russia
| | - Olga V Kulikova
- Department of Clinical Cardiology and Molecular Genetics, Federal State Institution National Center for Preventive Medicine, Moscow, Russia
| | - Alexey N Meshkov
- Department of Molecular and Cellular Genetics, Pirogov Russian National Research Medical University, Moscow, Russia.,Laboratory of Molecular Genetics, Federal State Institution National Center for Preventive Medicine, Moscow, Russia
| | - Anastasia A Zharikova
- M.V. Lomonosov Moscow State University, Moscow, Russia.,Laboratory of Molecular Genetics, Federal State Institution National Center for Preventive Medicine, Moscow, Russia
| | - Serguey N Koretsky
- Department of Fundamental and Applied Aspects of Obesity, Federal State Institution National Center for Preventive Medicine, Moscow, Russia
| | - Maria S Kharlap
- Cardiac Arrhythmias Department, Federal State Institution National Center for Preventive Medicine, Moscow, Russia
| | - Caroline Stanasiuk
- Erich and Hanna Klessmann Institute, Heart and Diabetes Centre NRW, University Hospital of the Ruhr-University Bochum, Bad Oeynhausen, Germany
| | - Elena A Mershina
- M.V. Lomonosov Moscow State University, Moscow, Russia.,Radiology Department, Lomonosov Moscow State University Medical Research and Educational Center, Moscow, Russia
| | - Valentin E Sinitsyn
- M.V. Lomonosov Moscow State University, Moscow, Russia.,Radiology Department, Lomonosov Moscow State University Medical Research and Educational Center, Moscow, Russia
| | - Alexey O Shevchenko
- Department of Critical Care Translational Medicine, V.I. Shumakov National Medical Research Center of Transplantology and Artificial Organs, Moscow, Russia
| | - Natalia P Mozheyko
- Pathology Department, V.I. Shumakov National Medical Research Center of Transplantology and Artificial Organs, Moscow, Russia
| | - Oksana M Drapkina
- Department of Fundamental and Applied Aspects of Obesity, Federal State Institution National Center for Preventive Medicine, Moscow, Russia
| | | | - Hendrik Milting
- Erich and Hanna Klessmann Institute, Heart and Diabetes Centre NRW, University Hospital of the Ruhr-University Bochum, Bad Oeynhausen, Germany
| | - Mikhail Yu Skoblov
- Laboratory of Functional Genomics, Research Centre for Medical Genetics (RCMG), Moscow, Russia, Russia.,School of Biomedicine, Far Eastern Federal University, Vladivostok, Russia
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Brodehl A, Stanasiuk C, Anselmetti D, Gummert J, Milting H. Incorporation of desmocollin-2 into the plasma membrane requires N-glycosylation at multiple sites. FEBS Open Bio 2019; 9:996-1007. [PMID: 30942563 PMCID: PMC6487837 DOI: 10.1002/2211-5463.12631] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2018] [Revised: 02/28/2019] [Accepted: 03/21/2019] [Indexed: 12/11/2022] Open
Abstract
Desmocollin‐2 (DSC2) is a desmosomal protein of the cadherin family. Desmosomes are multiprotein complexes, which are involved in cell adhesion of cardiomyocytes and of keratinocytes. The molecular structure of the complete extracellular domain (ECD) of DSC2 was recently described, revealing three disulfide bridges, four N‐glycosylation sites, and four O‐mannosylation sites. However, the functional relevance of these post‐translational modifications for the protein trafficking of DSC2 to the plasma membrane is still unknown. Here, we generated a set of DSC2 mutants, in which we systematically exchanged all N‐glycosylation sites, O‐mannosylation sites, and disulfide bridges within the ECD and investigated the resulting subcellular localization by confocal laser scanning microscopy. Of note, all single and double N‐glycosylation‐ deficient mutants were efficiently incorporated into the plasma membrane, indicating that the absence of these glycosylation sites has a minor effect on the protein trafficking of DSC2. However, the exchange of multiple N‐glycosylation sites resulted in intracellular accumulation. Colocalization analysis using cell compartment trackers revealed that N‐glycosylation‐ deficient DSC2 mutants were retained within the Golgi apparatus. In contrast, elimination of the four O‐mannosylation sites or the disulfide bridges in the ECD has no obvious effect on the intracellular protein processing of DSC2. These experiments underscore the importance of N‐glycosylation at multiple sites of DSC2 for efficient intracellular transport to the plasma membrane.
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Affiliation(s)
- Andreas Brodehl
- Erich and Hanna Klessmann Institute for Cardiovascular Research & Development (EHKI), Heart and Diabetes Center NRW, University Hospital of the Ruhr-University Bochum, Oeynhausen, Germany
| | - Caroline Stanasiuk
- Erich and Hanna Klessmann Institute for Cardiovascular Research & Development (EHKI), Heart and Diabetes Center NRW, University Hospital of the Ruhr-University Bochum, Oeynhausen, Germany
| | - Dario Anselmetti
- Faculty of Physics, Experimental Biophysics and Applied Nanoscience, Bielefeld Institute for Nanoscience (BINAS), Bielefeld University, Germany
| | - Jan Gummert
- Erich and Hanna Klessmann Institute for Cardiovascular Research & Development (EHKI), Heart and Diabetes Center NRW, University Hospital of the Ruhr-University Bochum, Oeynhausen, Germany
| | - Hendrik Milting
- Erich and Hanna Klessmann Institute for Cardiovascular Research & Development (EHKI), Heart and Diabetes Center NRW, University Hospital of the Ruhr-University Bochum, Oeynhausen, Germany
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25
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Debus JD, Milting H, Brodehl A, Kassner A, Anselmetti D, Gummert J, Gaertner-Rommel A. In vitro analysis of arrhythmogenic cardiomyopathy associated desmoglein-2 (DSG2) mutations reveals diverse glycosylation patterns. J Mol Cell Cardiol 2019; 129:303-313. [DOI: 10.1016/j.yjmcc.2019.03.014] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/18/2018] [Revised: 02/06/2019] [Accepted: 03/14/2019] [Indexed: 12/12/2022]
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26
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Brodehl A, Gaertner-Rommel A, Milting H. Molecular insights into cardiomyopathies associated with desmin (DES) mutations. Biophys Rev 2018; 10:983-1006. [PMID: 29926427 DOI: 10.1007/s12551-018-0429-0] [Citation(s) in RCA: 77] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2018] [Accepted: 05/22/2018] [Indexed: 12/15/2022] Open
Abstract
Increasing usage of next-generation sequencing techniques pushed during the last decade cardiogenetic diagnostics leading to the identification of a huge number of genetic variants in about 170 genes associated with cardiomyopathies, channelopathies, or syndromes with cardiac involvement. Because of the biochemical and cellular complexity, it is challenging to understand the clinical meaning or even the relevant pathomechanisms of the majority of genetic sequence variants. However, detailed knowledge about the associated molecular pathomechanism is essential for the development of efficient therapeutic strategies in future and genetic counseling. Mutations in DES, encoding the muscle-specific intermediate filament protein desmin, have been identified in different kinds of cardiac and skeletal myopathies. Here, we review the functions of desmin in health and disease with a focus on cardiomyopathies. In addition, we will summarize the genetic and clinical literature about DES mutations and will explain relevant cell and animal models. Moreover, we discuss upcoming perspectives and consequences of novel experimental approaches like genome editing technology, which might open a novel research field contributing to the development of efficient and mutation-specific treatment options.
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Affiliation(s)
- Andreas Brodehl
- Erich and Hanna Klessmann Institute for Cardiovascular Research & Development, Heart and Diabetes Centre NRW, Ruhr-University Bochum, Georgstrasse 11, 32545, Bad Oeynhausen, Germany.
| | - Anna Gaertner-Rommel
- Erich and Hanna Klessmann Institute for Cardiovascular Research & Development, Heart and Diabetes Centre NRW, Ruhr-University Bochum, Georgstrasse 11, 32545, Bad Oeynhausen, Germany
| | - Hendrik Milting
- Erich and Hanna Klessmann Institute for Cardiovascular Research & Development, Heart and Diabetes Centre NRW, Ruhr-University Bochum, Georgstrasse 11, 32545, Bad Oeynhausen, Germany.
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27
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Schirmer I, Dieding M, Klauke B, Brodehl A, Gaertner-Rommel A, Walhorn V, Gummert J, Schulz U, Paluszkiewicz L, Anselmetti D, Milting H. A novel desmin (DES) indel mutation causes severe atypical cardiomyopathy in combination with atrioventricular block and skeletal myopathy. Mol Genet Genomic Med 2017; 6:288-293. [PMID: 29274115 PMCID: PMC5902401 DOI: 10.1002/mgg3.358] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2017] [Revised: 11/02/2017] [Accepted: 11/08/2017] [Indexed: 12/31/2022] Open
Abstract
Background DES mutations cause different cardiac and skeletal myopathies. Most of them are missense mutations. Methods Using a next‐generation sequencing cardiac 174 gene panel, we identified a novel heterozygous in‐frame indel mutation (DES‐c.493_520del28insGCGT, p.Q165_A174delinsAS) in a Caucasian patient with cardiomyopathy in combination with atrioventricular block and skeletal myopathy. This indel mutation is located in the coding region of the first exon. Family anamnesis revealed a history of sudden cardiac death. We performed cell transfection experiments and in vitro assembly experiments to prove the pathogenicity of this novel DES indel mutation. Results These experiments revealed a severe filament formation defect of mutant desmin supporting the pathogenicity. In addition, we labeled a skeletal muscle biopsy from the mutation carrier revealing cytoplasmic desmin positive protein aggregates. In summary, we identified and functionally characterized a pathogenic DES indel mutation causing cardiac and skeletal myopathy. Conclusion Our study has relevance for the clinical and genetic interpretation of further DES indel mutations causing cardiac or skeletal myopathies and might be helpful for risk stratification.
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Affiliation(s)
- Ilona Schirmer
- Erich and Hanna Klessmann Institute for Cardiovascular Research & Development (EHKI), Heart and Diabetes Centre NRW, University Hospital of the Ruhr-University Bochum, Bad Oeynhausen, Germany
| | - Mareike Dieding
- Faculty of Physics, Experimental Biophysics and Applied Nanoscience, Bielefeld Institute for Nanoscience (BINAS), Bielefeld University, Bielefeld, Germany
| | - Bärbel Klauke
- Erich and Hanna Klessmann Institute for Cardiovascular Research & Development (EHKI), Heart and Diabetes Centre NRW, University Hospital of the Ruhr-University Bochum, Bad Oeynhausen, Germany
| | - Andreas Brodehl
- Erich and Hanna Klessmann Institute for Cardiovascular Research & Development (EHKI), Heart and Diabetes Centre NRW, University Hospital of the Ruhr-University Bochum, Bad Oeynhausen, Germany
| | - Anna Gaertner-Rommel
- Erich and Hanna Klessmann Institute for Cardiovascular Research & Development (EHKI), Heart and Diabetes Centre NRW, University Hospital of the Ruhr-University Bochum, Bad Oeynhausen, Germany
| | - Volker Walhorn
- Faculty of Physics, Experimental Biophysics and Applied Nanoscience, Bielefeld Institute for Nanoscience (BINAS), Bielefeld University, Bielefeld, Germany
| | - Jan Gummert
- Erich and Hanna Klessmann Institute for Cardiovascular Research & Development (EHKI), Heart and Diabetes Centre NRW, University Hospital of the Ruhr-University Bochum, Bad Oeynhausen, Germany
| | - Uwe Schulz
- Erich and Hanna Klessmann Institute for Cardiovascular Research & Development (EHKI), Heart and Diabetes Centre NRW, University Hospital of the Ruhr-University Bochum, Bad Oeynhausen, Germany
| | - Lech Paluszkiewicz
- Erich and Hanna Klessmann Institute for Cardiovascular Research & Development (EHKI), Heart and Diabetes Centre NRW, University Hospital of the Ruhr-University Bochum, Bad Oeynhausen, Germany
| | - Dario Anselmetti
- Faculty of Physics, Experimental Biophysics and Applied Nanoscience, Bielefeld Institute for Nanoscience (BINAS), Bielefeld University, Bielefeld, Germany
| | - Hendrik Milting
- Erich and Hanna Klessmann Institute for Cardiovascular Research & Development (EHKI), Heart and Diabetes Centre NRW, University Hospital of the Ruhr-University Bochum, Bad Oeynhausen, Germany
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28
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Bermúdez-Jiménez FJ, Carriel V, Brodehl A, Alaminos M, Campos A, Schirmer I, Milting H, Abril BÁ, Álvarez M, López-Fernández S, García-Giustiniani D, Monserrat L, Tercedor L, Jiménez-Jáimez J. Novel Desmin Mutation p.Glu401Asp Impairs Filament Formation, Disrupts Cell Membrane Integrity, and Causes Severe Arrhythmogenic Left Ventricular Cardiomyopathy/Dysplasia. Circulation 2017; 137:1595-1610. [PMID: 29212896 DOI: 10.1161/circulationaha.117.028719] [Citation(s) in RCA: 67] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/03/2017] [Accepted: 11/09/2017] [Indexed: 11/16/2022]
Abstract
BACKGROUND Desmin (DES) mutations cause severe skeletal and cardiac muscle disease with heterogeneous phenotypes. Recently, DES mutations were described in patients with inherited arrhythmogenic right ventricular cardiomyopathy/dysplasia, although their cellular and molecular pathomechanisms are not precisely known. Our aim is to describe clinically and functionally the novel DES-p.Glu401Asp mutation as a cause of inherited left ventricular arrhythmogenic cardiomyopathy/dysplasia. METHODS We identified the novel DES mutation p.Glu401Asp in a large Spanish family with inherited left ventricular arrhythmogenic cardiomyopathy/dysplasia and a high incidence of adverse cardiac events. A full clinical evaluation was performed on all mutation carriers and noncarriers to establish clinical and genetic cosegregation. In addition, desmin, and intercalar disc-related proteins expression were histologically analyzed in explanted cardiac tissue affected by the DES mutation. Furthermore, mesenchymal stem cells were isolated and cultured from 2 family members with the DES mutation (1 with mild and 1 with severe symptomatology) and a member without the mutation (control) and differentiated ex vivo to cardiomyocytes. Then, important genes related to cardiac differentiation and function were analyzed by real-time quantitative polymerase chain reaction. Finally, the p.Glu401Asp mutated DES gene was transfected into cell lines and analyzed by confocal microscopy. RESULTS Of the 66 family members screened for the DES-p.Glu401Asp mutation, 23 of them were positive, 6 were obligate carriers, and 2 were likely carriers. One hundred percent of genotype-positive patients presented data consistent with inherited arrhythmogenic cardiomyopathy/dysplasia phenotype with variable disease severity expression, high-incidence of sudden cardiac death, and absence of skeletal myopathy or conduction system disorders. Immunohistochemistry was compatible with inherited arrhythmogenic cardiomyopathy/dysplasia, and the functional study showed an abnormal growth pattern and cellular adhesion, reduced desmin RNA expression, and some other membrane proteins, as well, and desmin aggregates in transfected cells expressing the mutant desmin. CONCLUSIONS The DES-p.Glu401Asp mutation causes predominant inherited left ventricular arrhythmogenic cardiomyopathy/dysplasia with a high incidence of adverse clinical events in the absence of skeletal myopathy or conduction system disorders. The pathogenic mechanism probably corresponds to an alteration in desmin dimer and oligomer assembly and its connection with membrane proteins within the intercalated disc.
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MESH Headings
- Adolescent
- Adult
- Aged
- Aged, 80 and over
- Arrhythmias, Cardiac/diagnosis
- Arrhythmias, Cardiac/genetics
- Arrhythmias, Cardiac/physiopathology
- Cardiomyopathies/diagnosis
- Cardiomyopathies/genetics
- Cardiomyopathies/physiopathology
- Cell Differentiation/genetics
- Cells, Cultured
- Child
- Desmin/genetics
- Desmin/metabolism
- Electrocardiography
- Female
- Genetic Predisposition to Disease
- Heart Defects, Congenital/diagnosis
- Heart Defects, Congenital/genetics
- Heart Defects, Congenital/physiopathology
- Heart Ventricles/abnormalities
- Heart Ventricles/metabolism
- Heart Ventricles/physiopathology
- Heredity
- Heterozygote
- Humans
- Magnetic Resonance Imaging
- Male
- Mesenchymal Stem Cells/metabolism
- Mesenchymal Stem Cells/pathology
- Middle Aged
- Mutation
- Myocytes, Cardiac/metabolism
- Myocytes, Cardiac/pathology
- Pedigree
- Phenotype
- Spain
- Young Adult
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Affiliation(s)
- Francisco José Bermúdez-Jiménez
- Cardiology Department, Virgen de las Nieves University Hospital, Granada, Spain (F.J.B.-J., B.A.A., M. Álvarez, S.L.-F., L.T., J.J.-J.).
- Department of Histology, Tissue Engineering Group, Faculty of Medicine, University of Granada, Spain (F.J.B.-J., B.A.A., M. Álvarez, S.L.-F, L.T., J.J.-J., V.C., M. Alaminos, A.C.)
- Instituto de Investigación Biosanitaria (F.J.B.-J., B.A.A., M. Álvarez, S.L.-F, L.T., J.J.-J., V.C., M. Alaminos, A.C.)
| | - Víctor Carriel
- Department of Histology, Tissue Engineering Group, Faculty of Medicine, University of Granada, Spain (F.J.B.-J., B.A.A., M. Álvarez, S.L.-F, L.T., J.J.-J., V.C., M. Alaminos, A.C.)
- Instituto de Investigación Biosanitaria (F.J.B.-J., B.A.A., M. Álvarez, S.L.-F, L.T., J.J.-J., V.C., M. Alaminos, A.C.)
| | - Andreas Brodehl
- Erich and Hanna Klessmann Institute for Cardiovascular Research and Development, Heart and Diabetes Centre North Rhine-Westphalia, Ruhr University Bochum, Bad Oeynhausen, Germany (A.B., I.S., H.M.)
| | - Miguel Alaminos
- Department of Histology, Tissue Engineering Group, Faculty of Medicine, University of Granada, Spain (F.J.B.-J., B.A.A., M. Álvarez, S.L.-F, L.T., J.J.-J., V.C., M. Alaminos, A.C.)
- Instituto de Investigación Biosanitaria (F.J.B.-J., B.A.A., M. Álvarez, S.L.-F, L.T., J.J.-J., V.C., M. Alaminos, A.C.)
| | - Antonio Campos
- Department of Histology, Tissue Engineering Group, Faculty of Medicine, University of Granada, Spain (F.J.B.-J., B.A.A., M. Álvarez, S.L.-F, L.T., J.J.-J., V.C., M. Alaminos, A.C.)
- Instituto de Investigación Biosanitaria (F.J.B.-J., B.A.A., M. Álvarez, S.L.-F, L.T., J.J.-J., V.C., M. Alaminos, A.C.)
| | - Ilona Schirmer
- Erich and Hanna Klessmann Institute for Cardiovascular Research and Development, Heart and Diabetes Centre North Rhine-Westphalia, Ruhr University Bochum, Bad Oeynhausen, Germany (A.B., I.S., H.M.)
| | - Hendrik Milting
- Erich and Hanna Klessmann Institute for Cardiovascular Research and Development, Heart and Diabetes Centre North Rhine-Westphalia, Ruhr University Bochum, Bad Oeynhausen, Germany (A.B., I.S., H.M.)
| | - Beatriz Álvarez Abril
- Cardiology Department, Virgen de las Nieves University Hospital, Granada, Spain (F.J.B.-J., B.A.A., M. Álvarez, S.L.-F., L.T., J.J.-J.)
- Department of Histology, Tissue Engineering Group, Faculty of Medicine, University of Granada, Spain (F.J.B.-J., B.A.A., M. Álvarez, S.L.-F, L.T., J.J.-J., V.C., M. Alaminos, A.C.)
- Instituto de Investigación Biosanitaria (F.J.B.-J., B.A.A., M. Álvarez, S.L.-F, L.T., J.J.-J., V.C., M. Alaminos, A.C.)
| | - Miguel Álvarez
- Cardiology Department, Virgen de las Nieves University Hospital, Granada, Spain (F.J.B.-J., B.A.A., M. Álvarez, S.L.-F., L.T., J.J.-J.)
- Department of Histology, Tissue Engineering Group, Faculty of Medicine, University of Granada, Spain (F.J.B.-J., B.A.A., M. Álvarez, S.L.-F, L.T., J.J.-J., V.C., M. Alaminos, A.C.)
- Instituto de Investigación Biosanitaria (F.J.B.-J., B.A.A., M. Álvarez, S.L.-F, L.T., J.J.-J., V.C., M. Alaminos, A.C.)
| | - Silvia López-Fernández
- Cardiology Department, Virgen de las Nieves University Hospital, Granada, Spain (F.J.B.-J., B.A.A., M. Álvarez, S.L.-F., L.T., J.J.-J.)
- Department of Histology, Tissue Engineering Group, Faculty of Medicine, University of Granada, Spain (F.J.B.-J., B.A.A., M. Álvarez, S.L.-F, L.T., J.J.-J., V.C., M. Alaminos, A.C.)
- Instituto de Investigación Biosanitaria (F.J.B.-J., B.A.A., M. Álvarez, S.L.-F, L.T., J.J.-J., V.C., M. Alaminos, A.C.)
| | | | - Lorenzo Monserrat
- Cardiology Department, Health in Code, A Coruña, Spain (D.G.-G., L.M.)
| | - Luis Tercedor
- Cardiology Department, Virgen de las Nieves University Hospital, Granada, Spain (F.J.B.-J., B.A.A., M. Álvarez, S.L.-F., L.T., J.J.-J.)
- Department of Histology, Tissue Engineering Group, Faculty of Medicine, University of Granada, Spain (F.J.B.-J., B.A.A., M. Álvarez, S.L.-F, L.T., J.J.-J., V.C., M. Alaminos, A.C.)
- Instituto de Investigación Biosanitaria (F.J.B.-J., B.A.A., M. Álvarez, S.L.-F, L.T., J.J.-J., V.C., M. Alaminos, A.C.)
| | - Juan Jiménez-Jáimez
- Cardiology Department, Virgen de las Nieves University Hospital, Granada, Spain (F.J.B.-J., B.A.A., M. Álvarez, S.L.-F., L.T., J.J.-J.)
- Department of Histology, Tissue Engineering Group, Faculty of Medicine, University of Granada, Spain (F.J.B.-J., B.A.A., M. Álvarez, S.L.-F, L.T., J.J.-J., V.C., M. Alaminos, A.C.)
- Instituto de Investigación Biosanitaria (F.J.B.-J., B.A.A., M. Álvarez, S.L.-F, L.T., J.J.-J., V.C., M. Alaminos, A.C.)
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29
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Schirmer I, Dieding M, Brodehl A, Klauke B, Gerdes D, Walhorn V, Milting H. P6291Molecular and cellular characterization of a novel desmin mutation identified in a patient with a cardiac and skeletal myopathy. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx493.p6291] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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30
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Brodehl A, Williams T, Rezazadeh S, Munsie N, Duff H, Childs S, Gerull B. P1601Mutations in ILK (integrin linked kinase) are associated with human arrhythmogenic cardiomyopathy and decreased survival in zebrafish. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx502.p1601] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Affiliation(s)
- A. Brodehl
- Libin Cardiovascular Institute of Alberta - University of Calgary, Calgary, Canada
| | - T. Williams
- Comprehensive Heart Failure Center (CHFC), Internal Medicine, Wurzburg, Germany
| | - S. Rezazadeh
- Libin Cardiovascular Institute of Alberta - University of Calgary, Calgary, Canada
| | - N. Munsie
- University of Calgary, Department of Biochemistry and Molecular Biology, Calgary, Canada
| | - H. Duff
- Libin Cardiovascular Institute of Alberta - University of Calgary, Calgary, Canada
| | - S.J. Childs
- University of Calgary, Department of Biochemistry and Molecular Biology, Calgary, Canada
| | - B. Gerull
- Comprehensive Heart Failure Center (CHFC), Internal Medicine, Wurzburg, Germany
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31
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Brodehl A, Gaertner-Rommel A, Klauke B, Grewe SA, Schirmer I, Peterschröder A, Faber L, Vorgerd M, Gummert J, Anselmetti D, Schulz U, Paluszkiewicz L, Milting H. The novel αB-crystallin (CRYAB) mutation p.D109G causes restrictive cardiomyopathy. Hum Mutat 2017; 38:947-952. [PMID: 28493373 DOI: 10.1002/humu.23248] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2017] [Revised: 05/03/2017] [Accepted: 05/03/2017] [Indexed: 11/09/2022]
Abstract
Restrictive cardiomyopathy (RCM) is a rare heart disease characterized by diastolic dysfunction and atrial enlargement. The genetic etiology of RCM is not completely known. We identified by a next-generation sequencing panel the novel CRYAB missense mutation c.326A>G, p.D109G in a small family with RCM in combination with skeletal myopathy with an early onset of the disease. CRYAB encodes αB-crystallin, a member of the small heat shock protein family, which is highly expressed in cardiac and skeletal muscle. In addition to in silico prediction analysis, our structural analysis of explanted myocardial tissue of a mutation carrier as well as in vitro cell transfection experiments revealed abnormal protein aggregation of mutant αB-crystallin and desmin, supporting the deleterious effect of this novel mutation. In conclusion, CRYAB appears to be a novel RCM gene, which might have relevance for the molecular diagnosis and the genetic counseling of further affected families in the future.
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Affiliation(s)
- Andreas Brodehl
- Department of Thoracic and Cardiovascular Surgery, Heart and Diabetes Centre NRW, University Hospital of the Ruhr-University Bochum, Erich and Hanna Klessmann Institute for Cardiovascular Research & Development (EHKI), Bad Oeynhausen, Germany
| | - Anna Gaertner-Rommel
- Department of Thoracic and Cardiovascular Surgery, Heart and Diabetes Centre NRW, University Hospital of the Ruhr-University Bochum, Erich and Hanna Klessmann Institute for Cardiovascular Research & Development (EHKI), Bad Oeynhausen, Germany
| | - Bärbel Klauke
- Department of Thoracic and Cardiovascular Surgery, Heart and Diabetes Centre NRW, University Hospital of the Ruhr-University Bochum, Erich and Hanna Klessmann Institute for Cardiovascular Research & Development (EHKI), Bad Oeynhausen, Germany
| | - Simon Andre Grewe
- Department of Thoracic and Cardiovascular Surgery, Heart and Diabetes Centre NRW, University Hospital of the Ruhr-University Bochum, Erich and Hanna Klessmann Institute for Cardiovascular Research & Development (EHKI), Bad Oeynhausen, Germany
| | - Ilona Schirmer
- Department of Thoracic and Cardiovascular Surgery, Heart and Diabetes Centre NRW, University Hospital of the Ruhr-University Bochum, Erich and Hanna Klessmann Institute for Cardiovascular Research & Development (EHKI), Bad Oeynhausen, Germany
| | - Andreas Peterschröder
- Department of Thoracic and Cardiovascular Surgery, Heart and Diabetes Centre NRW, University Hospital of the Ruhr-University Bochum, Institute of Radiology, Nuclear Medicine and Molecular Imaging, Bad Oeynhausen, Germany
| | - Lothar Faber
- Department of Thoracic and Cardiovascular Surgery, Heart and Diabetes Centre NRW, University Hospital of the Ruhr-University Bochum, Clinic of Cardiology, Bad Oeynhausen, Germany
| | - Matthias Vorgerd
- Department of Neurology, BG-University Hospital Bergmannsheil, Bochum, Germany
| | - Jan Gummert
- Department of Thoracic and Cardiovascular Surgery, Heart and Diabetes Centre NRW, University Hospital of the Ruhr-University Bochum, Erich and Hanna Klessmann Institute for Cardiovascular Research & Development (EHKI), Bad Oeynhausen, Germany
| | - Dario Anselmetti
- Bielefeld University and Bielefeld Institute for Nanoscience (BINAS), Faculty of Physics, Experimental Biophysics and Applied Nanoscience, Bielefeld, Germany
| | - Uwe Schulz
- Department of Thoracic and Cardiovascular Surgery, Heart and Diabetes Centre NRW, University Hospital of the Ruhr-University Bochum, Erich and Hanna Klessmann Institute for Cardiovascular Research & Development (EHKI), Bad Oeynhausen, Germany
| | - Lech Paluszkiewicz
- Department of Thoracic and Cardiovascular Surgery, Heart and Diabetes Centre NRW, University Hospital of the Ruhr-University Bochum, Erich and Hanna Klessmann Institute for Cardiovascular Research & Development (EHKI), Bad Oeynhausen, Germany
| | - Hendrik Milting
- Department of Thoracic and Cardiovascular Surgery, Heart and Diabetes Centre NRW, University Hospital of the Ruhr-University Bochum, Erich and Hanna Klessmann Institute for Cardiovascular Research & Development (EHKI), Bad Oeynhausen, Germany
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Brodehl A, Belke DD, Garnett L, Martens K, Abdelfatah N, Rodriguez M, Diao C, Chen YX, Gordon PMK, Nygren A, Gerull B. Transgenic mice overexpressing desmocollin-2 (DSC2) develop cardiomyopathy associated with myocardial inflammation and fibrotic remodeling. PLoS One 2017; 12:e0174019. [PMID: 28339476 PMCID: PMC5365111 DOI: 10.1371/journal.pone.0174019] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2016] [Accepted: 03/02/2017] [Indexed: 12/16/2022] Open
Abstract
Background Arrhythmogenic cardiomyopathy is an inherited heart muscle disorder leading to ventricular arrhythmias and heart failure, mainly as a result of mutations in cardiac desmosomal genes. Desmosomes are cell-cell junctions mediating adhesion of cardiomyocytes; however, the molecular and cellular mechanisms underlying the disease remain widely unknown. Desmocollin-2 is a desmosomal cadherin serving as an anchor molecule required to reconstitute homeostatic intercellular adhesion with desmoglein-2. Cardiac specific lack of desmoglein-2 leads to severe cardiomyopathy, whereas overexpression does not. In contrast, the corresponding data for desmocollin-2 are incomplete, in particular from the view of protein overexpression. Therefore, we developed a mouse model overexpressing desmocollin-2 to determine its potential contribution to cardiomyopathy and intercellular adhesion pathology. Methods and results We generated transgenic mice overexpressing DSC2 in cardiac myocytes. Transgenic mice developed a severe cardiac dysfunction over 5 to 13 weeks as indicated by 2D-echocardiography measurements. Corresponding histology and immunohistochemistry demonstrated fibrosis, necrosis and calcification which were mainly localized in patches near the epi- and endocardium of both ventricles. Expressions of endogenous desmosomal proteins were markedly reduced in fibrotic areas but appear to be unchanged in non-fibrotic areas. Furthermore, gene expression data indicate an early up-regulation of inflammatory and fibrotic remodeling pathways between 2 to 3.5 weeks of age. Conclusion Cardiac specific overexpression of desmocollin-2 induces necrosis, acute inflammation and patchy cardiac fibrotic remodeling leading to fulminant biventricular cardiomyopathy.
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Affiliation(s)
- Andreas Brodehl
- Department of Cardiac Sciences and Libin Cardiovascular Institute of Alberta, University of Calgary, Calgary, Alberta, Canada
| | - Darrell D. Belke
- Department of Cardiac Sciences and Libin Cardiovascular Institute of Alberta, University of Calgary, Calgary, Alberta, Canada
| | - Lauren Garnett
- Department of Cardiac Sciences and Libin Cardiovascular Institute of Alberta, University of Calgary, Calgary, Alberta, Canada
| | - Kristina Martens
- Department of Cardiac Sciences and Libin Cardiovascular Institute of Alberta, University of Calgary, Calgary, Alberta, Canada
| | - Nelly Abdelfatah
- Department of Cardiac Sciences and Libin Cardiovascular Institute of Alberta, University of Calgary, Calgary, Alberta, Canada
| | - Marcela Rodriguez
- Department of Cardiac Sciences and Libin Cardiovascular Institute of Alberta, University of Calgary, Calgary, Alberta, Canada
- Schulich School of Engineering, University of Calgary, Calgary, Alberta, Canada
| | - Catherine Diao
- Department of Cardiac Sciences and Libin Cardiovascular Institute of Alberta, University of Calgary, Calgary, Alberta, Canada
| | - Yong-Xiang Chen
- Department of Cardiac Sciences and Libin Cardiovascular Institute of Alberta, University of Calgary, Calgary, Alberta, Canada
| | - Paul M. K. Gordon
- Alberta Children's Hospital Research Institute Genomics and Bioinformatics Facility, University of Calgary, Calgary, Alberta, Canada
| | - Anders Nygren
- Department of Cardiac Sciences and Libin Cardiovascular Institute of Alberta, University of Calgary, Calgary, Alberta, Canada
- Schulich School of Engineering, University of Calgary, Calgary, Alberta, Canada
| | - Brenda Gerull
- Department of Cardiac Sciences and Libin Cardiovascular Institute of Alberta, University of Calgary, Calgary, Alberta, Canada
- Comprehensive Heart Failure Center and Department of Internal Medicine I, University Hospital Würzburg, Würzburg, Germany
- * E-mail:
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Brodehl A, Milting H. Functional studies can contribute to predict the pathogenicity of a novel mutation for cardiomyopathy. J Mol Cell Cardiol 2017; 109:57. [PMID: 28189650 DOI: 10.1016/j.yjmcc.2017.01.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/30/2016] [Revised: 01/18/2017] [Accepted: 01/20/2017] [Indexed: 10/20/2022]
Affiliation(s)
- Andreas Brodehl
- Herz- und Diabeteszentrum NRW, Universitätsklinikum der Ruhr Universität Bochum, Erich und Hanna Klessmann-Institut für kardiovaskuläre Forschung und Entwicklung, Georgstrasse 11, 32545, Bad Oeynhausen, NRW, Germany
| | - Hendrik Milting
- Herz- und Diabeteszentrum NRW, Universitätsklinikum der Ruhr Universität Bochum, Erich und Hanna Klessmann-Institut für kardiovaskuläre Forschung und Entwicklung, Georgstrasse 11, 32545, Bad Oeynhausen, NRW, Germany.
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Brodehl A, Ferrier RA, Hamilton SJ, Greenway SC, Brundler MA, Yu W, Gibson WT, McKinnon ML, McGillivray B, Alvarez N, Giuffre M, Schwartzentruber J, Gerull B. Mutations inFLNCare Associated with Familial Restrictive Cardiomyopathy. Hum Mutat 2016; 37:269-79. [DOI: 10.1002/humu.22942] [Citation(s) in RCA: 112] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2015] [Accepted: 11/23/2015] [Indexed: 01/22/2023]
Affiliation(s)
- Andreas Brodehl
- Department of Cardiac Sciences; Libin Cardiovascular Institute of Alberta; University of Calgary; Calgary Alberta Canada
| | - Raechel A. Ferrier
- Department of Medical Genetics; University of Calgary and Alberta Health Services; Calgary Alberta Canada
| | - Sara J. Hamilton
- Department of Medical Genetics; University of British Columbia; Vancouver British Columbia Canada
| | - Steven C. Greenway
- Department of Cardiac Sciences; Libin Cardiovascular Institute of Alberta; University of Calgary; Calgary Alberta Canada
- Department of Paediatrics; Alberta Children's Hospital Research Institute; University of Calgary; Calgary Alberta Canada
| | - Marie-Anne Brundler
- Department of Paediatrics; Alberta Children's Hospital Research Institute; University of Calgary; Calgary Alberta Canada
- Departments of Pathology and Laboratory Medicine; University of Calgary; Calgary Alberta Canada
| | - Weiming Yu
- Departments of Pathology and Laboratory Medicine; University of Calgary; Calgary Alberta Canada
| | - William T. Gibson
- Department of Medical Genetics; University of British Columbia; Vancouver British Columbia Canada
- Child and Family Research Institute; Vancouver British Columbia Canada
| | - Margaret L. McKinnon
- Department of Medical Genetics; University of British Columbia; Vancouver British Columbia Canada
| | - Barbara McGillivray
- Department of Medical Genetics; University of British Columbia; Vancouver British Columbia Canada
| | - Nanette Alvarez
- Department of Cardiac Sciences; Libin Cardiovascular Institute of Alberta; University of Calgary; Calgary Alberta Canada
| | - Michael Giuffre
- Department of Cardiac Sciences; Libin Cardiovascular Institute of Alberta; University of Calgary; Calgary Alberta Canada
| | | | - Brenda Gerull
- Department of Cardiac Sciences; Libin Cardiovascular Institute of Alberta; University of Calgary; Calgary Alberta Canada
- Department of Medical Genetics; University of Calgary and Alberta Health Services; Calgary Alberta Canada
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Brodehl A, Garnett L, Diao C, Martens K, Nygren A, Chen Y, Belke D, Gerull B. TRANSGENIC MICE OVEREXPRESSING DSC2 DEVELOP BIVENTRICULAR CARDIOMYOPATHY ASSOCIATED WITH FIBROSIS AND NECROSIS. Can J Cardiol 2015. [DOI: 10.1016/j.cjca.2015.07.148] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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Brodehl A, Ferrier R, Greenway S, Brundler M, Yu W, Alvarez N, Giuffre M, Gerull B. MUTATIONS IN FILAMIN C CAUSE FAMILIAL RESTRICTIVE CARDIOMYOPATHY. Can J Cardiol 2015. [DOI: 10.1016/j.cjca.2015.07.318] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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Brodehl A, Dieding M, Klauke B, Dec E, Madaan S, Huang T, Gargus J, Fatima A, Saric T, Cakar H, Walhorn V, Tönsing K, Skrzipczyk T, Cebulla R, Gerdes D, Schulz U, Gummert J, Svendsen JH, Olesen MS, Anselmetti D, Christensen AH, Kimonis V, Milting H. The novel desmin mutant p.A120D impairs filament formation, prevents intercalated disk localization, and causes sudden cardiac death. ACTA ACUST UNITED AC 2013; 6:615-23. [PMID: 24200904 DOI: 10.1161/circgenetics.113.000103] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
BACKGROUND The intermediate filament protein desmin is encoded by the gene DES and contributes to the mechanical stabilization of the striated muscle sarcomere and cell contacts within the cardiac intercalated disk. DES mutations cause severe skeletal and cardiac muscle diseases with heterogeneous phenotypes. Recently, DES mutations were also found in patients with arrhythmogenic right ventricular cardiomyopathy. Currently, the cellular and molecular pathomechanisms of the DES mutations leading to this disease are not exactly known. METHODS AND RESULTS We identified the 2 novel variants DES-p.A120D (c.359C>A) and DES-p.H326R (c.977A>G), which were characterized by cell culture experiments and atomic force microscopy. Family analysis indicated a broad spectrum of cardiomyopathies with a striking frequency of arrhythmias and sudden cardiac deaths. The in vitro experiments of desmin-p.A120D reveal a severe intrinsic filament formation defect causing cytoplasmic aggregates in cell lines and of the isolated recombinant protein. Model variants of codon 120 indicated that ionic interactions contribute to this filament formation defect. Ex vivo analysis of ventricular tissue slices revealed a loss of desmin staining within the intercalated disk and severe cytoplasmic aggregate formation, whereas z-band localization was not affected. The functional experiments of desmin-p.H326R did not demonstrate any differences from wild type. CONCLUSIONS Because of the functional in vivo and in vitro characterization, DES-p.A120D has to be regarded as a pathogenic mutation and DES-p.H326R as a rare variant with unknown significance. Presumably, the loss of the desmin-p. A120D filament localization at the intercalated disk explains its clinical arrhythmogenic potential.
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Harder A, Dieding M, Walhorn V, Degenhard S, Brodehl A, Wege C, Milting H, Anselmetti D. Apertureless scanning near-field optical microscopy of sparsely labeled tobacco mosaic viruses and the intermediate filament desmin. Beilstein J Nanotechnol 2013; 4:510-6. [PMID: 24062977 PMCID: PMC3778390 DOI: 10.3762/bjnano.4.60] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/18/2013] [Accepted: 08/22/2013] [Indexed: 05/08/2023]
Abstract
Both fluorescence imaging and atomic force microscopy (AFM) are highly versatile and extensively used in applications ranging from nanotechnology to life sciences. In fluorescence microscopy luminescent dyes serve as position markers. Moreover, they can be used as active reporters of their local vicinity. The dipolar coupling of the tip with the incident light and the fluorophore give rise to a local field and fluorescence enhancement. AFM topographic imaging allows for resolutions down to the atomic scale. It can be operated in vacuum, under ambient conditions and in liquids. This makes it ideal for the investigation of a wide range of different samples. Furthermore an illuminated AFM cantilever tip apex exposes strongly confined non-propagating electromagnetic fields that can serve as a coupling agent for single dye molecules. Thus, combining both techniques by means of apertureless scanning near-field optical microscopy (aSNOM) enables concurrent high resolution topography and fluorescence imaging. Commonly, among the various (apertureless) SNOM approaches metallic or metallized probes are used. Here, we report on our custom-built aSNOM setup, which uses commercially available monolithic silicon AFM cantilevers. The field enhancement confined to the tip apex facilitates an optical resolution down to 20 nm. Furthermore, the use of standard mass-produced AFM cantilevers spares elaborate probe production or modification processes. We investigated tobacco mosaic viruses and the intermediate filament protein desmin. Both are mixed complexes of building blocks, which are fluorescently labeled to a low degree. The simultaneous recording of topography and fluorescence data allows for the exact localization of distinct building blocks within the superordinate structures.
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Affiliation(s)
- Alexander Harder
- Experimental Biophysics and Applied Nanoscience, Faculty of Physics and Bielefeld Institute for Biophysics and Nanoscience (BINAS), Bielefeld University, Universitätsstrasse 25, D-33615 Bielefeld, Germany
| | - Mareike Dieding
- Experimental Biophysics and Applied Nanoscience, Faculty of Physics and Bielefeld Institute for Biophysics and Nanoscience (BINAS), Bielefeld University, Universitätsstrasse 25, D-33615 Bielefeld, Germany
| | - Volker Walhorn
- Experimental Biophysics and Applied Nanoscience, Faculty of Physics and Bielefeld Institute for Biophysics and Nanoscience (BINAS), Bielefeld University, Universitätsstrasse 25, D-33615 Bielefeld, Germany
| | - Sven Degenhard
- Department of Molecular Biology and Plant Virology, Institute of Biology, University of Stuttgart, Pfaffenwaldring 57, D-70569 Stuttgart, Germany
| | - Andreas Brodehl
- Erich and Hanna Klessmann Institute for Cardiovascular Research & Development (EHKI), Heart and Diabetes Center NRW, Ruhr University Bochum, Georgstraße 11, D-32545 Bad Oeynhausen, Germany
- Libin Cardiovascular Institute of Alberta, Department of Cardiac Sciences, University of Calgary, 3280 Hospital Drive NW, T2N4Z6, AB, Canada
| | - Christina Wege
- Department of Molecular Biology and Plant Virology, Institute of Biology, University of Stuttgart, Pfaffenwaldring 57, D-70569 Stuttgart, Germany
| | - Hendrik Milting
- Erich and Hanna Klessmann Institute for Cardiovascular Research & Development (EHKI), Heart and Diabetes Center NRW, Ruhr University Bochum, Georgstraße 11, D-32545 Bad Oeynhausen, Germany
| | - Dario Anselmetti
- Experimental Biophysics and Applied Nanoscience, Faculty of Physics and Bielefeld Institute for Biophysics and Nanoscience (BINAS), Bielefeld University, Universitätsstrasse 25, D-33615 Bielefeld, Germany
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Brodehl A, Hedde PN, Dieding M, Fatima A, Walhorn V, Gayda S, Šarić T, Klauke B, Gummert J, Anselmetti D, Heilemann M, Nienhaus GU, Milting H. Dual color photoactivation localization microscopy of cardiomyopathy-associated desmin mutants. J Biol Chem 2012; 287:16047-57. [PMID: 22403400 PMCID: PMC3346104 DOI: 10.1074/jbc.m111.313841] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2011] [Revised: 02/27/2012] [Indexed: 11/06/2022] Open
Abstract
Mutations in the DES gene coding for the intermediate filament protein desmin may cause skeletal and cardiac myopathies, which are frequently characterized by cytoplasmic aggregates of desmin and associated proteins at the cellular level. By atomic force microscopy, we demonstrated filament formation defects of desmin mutants, associated with arrhythmogenic right ventricular cardiomyopathy. To understand the pathogenesis of this disease, it is essential to analyze desmin filament structures under conditions in which both healthy and mutant desmin are expressed at equimolar levels mimicking an in vivo situation. Here, we applied dual color photoactivation localization microscopy using photoactivatable fluorescent proteins genetically fused to desmin and characterized the heterozygous status in living cells lacking endogenous desmin. In addition, we applied fluorescence resonance energy transfer to unravel short distance structural patterns of desmin mutants in filaments. For the first time, we present consistent high resolution data on the structural effects of five heterozygous desmin mutations on filament formation in vitro and in living cells. Our results may contribute to the molecular understanding of the pathological filament formation defects of heterozygous DES mutations in cardiomyopathies.
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Affiliation(s)
- Andreas Brodehl
- From the E. & H. Klessmann Institute for Cardiovascular Research & Development and
| | - Per Niklas Hedde
- the Institute of Applied Physics and Center for Functional Nanostructures, Karlsruhe Institute of Technology, 76128 Karlsruhe, Germany
| | - Mareike Dieding
- the Experimental Biophysics and Applied Nanoscience, Faculty of Physics and Bielefeld Institute for Biophysics and Nanoscience (BINAS), Bielefeld University, 33615 Bielefeld, Germany
| | - Azra Fatima
- the Institute for Neurophysiology, Medical Center, University of Cologne, 50931 Cologne, Germany
| | - Volker Walhorn
- the Experimental Biophysics and Applied Nanoscience, Faculty of Physics and Bielefeld Institute for Biophysics and Nanoscience (BINAS), Bielefeld University, 33615 Bielefeld, Germany
| | - Susan Gayda
- the Institute of Applied Physics and Center for Functional Nanostructures, Karlsruhe Institute of Technology, 76128 Karlsruhe, Germany
| | - Tomo Šarić
- the Institute for Neurophysiology, Medical Center, University of Cologne, 50931 Cologne, Germany
| | - Bärbel Klauke
- From the E. & H. Klessmann Institute for Cardiovascular Research & Development and
| | - Jan Gummert
- the Clinic of Cardio-Thoracic Surgery, Heart and Diabetes Center NRW, Ruhr-University Bochum, 32545 Bad Oeynhausen, Germany
| | - Dario Anselmetti
- the Experimental Biophysics and Applied Nanoscience, Faculty of Physics and Bielefeld Institute for Biophysics and Nanoscience (BINAS), Bielefeld University, 33615 Bielefeld, Germany
| | - Mike Heilemann
- the Department of Biotechnology & Biophysics, Julius-Maximilians-University Würzburg, 97074 Würzburg, Germany, and
| | - Gerd Ulrich Nienhaus
- the Institute of Applied Physics and Center for Functional Nanostructures, Karlsruhe Institute of Technology, 76128 Karlsruhe, Germany
- the Department of Physics, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801
| | - Hendrik Milting
- From the E. & H. Klessmann Institute for Cardiovascular Research & Development and
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Niklas Hedde P, Gayda S, Brodehl A, Gummert J, Milting H, Ulrich Nienhaus G. Colocalization Analysis of Mutant and Wildtype Desmin using Dual Color Super-Resolution Microscopy. Biophys J 2012. [DOI: 10.1016/j.bpj.2011.11.3918] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022] Open
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Klauke B, Kossmann S, Gaertner A, Brand K, Stork I, Brodehl A, Dieding M, Walhorn V, Anselmetti D, Gerdes D, Bohms B, Schulz U, Zu Knyphausen E, Vorgerd M, Gummert J, Milting H. De novo desmin-mutation N116S is associated with arrhythmogenic right ventricular cardiomyopathy. Hum Mol Genet 2010; 19:4595-607. [PMID: 20829228 DOI: 10.1093/hmg/ddq387] [Citation(s) in RCA: 134] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Arrhythmogenic right ventricular cardiomyopathy (ARVC) is an inherited heart muscle disease, frequently accompanied by sudden cardiac death and terminal heart failure. Genotyping of ARVC patients might be used for palliative treatment of the affected family. We genotyped a cohort of 22 ARVC patients referred to molecular genetic screening in our heart center for mutations in the desmosomal candidate genes JUP, DSG2, DSC2, DSP and PKP2 known to be associated with ARVC. In 43% of the cohort, we found disease-associated sequence variants. In addition, we screened for desmin mutations and found a novel desmin-mutation p.N116S in a patient with ARVC and terminal heart failure, which is located in segment 1A of the desmin rod domain. The mutation leads to the aggresome formation in cardiac and skeletal muscle without signs of an overt clinical myopathy. Cardiac aggresomes appear to be prominent, especially in the right ventricle of the heart. Viscosimetry and atomic force microscopy of the desmin wild-type and N116S mutant isolated from recombinant Escherichia coli revealed severe impairment of the filament formation, which was supported by transfections in SW13 cells. Thus, the gene coding for desmin appears to be a novel ARVC gene, which should be included in molecular genetic screening of ARVC patients.
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Affiliation(s)
- Baerbel Klauke
- Herz- & Diabeteszentrum NRW, Klinik f. Thorax- und Kardiovaskularchirurgie, Erich und Hanna Klessmann-Institutfür Kardiovaskulaere Forschung und Entwicklung/Klinik fuer angeborene Herzfehler, Georgstrasse 11, Bad Oeynhausen, Germany
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Gawlowski T, Stratmann B, Stork I, Engelbrecht B, Brodehl A, Niehaus K, Körfer R, Tschoepe D, Milting H. Heat shock protein 27 modification is increased in the human diabetic failing heart. Horm Metab Res 2009; 41:594-9. [PMID: 19384818 DOI: 10.1055/s-0029-1216374] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Chronic conditions like diabetes mellitus (DM) leading to altered metabolism might cause cardiac dysfunction. Hyperglycemia plays an important role in the pathogenesis of diabetic complications including accumulation of methylglyoxal (MG), a highly reactive alpha-dicarbonyl metabolite of glucose degradation pathways and increased generation of advanced glycation endproducts (AGEs). The aim of this investigation was to study the extent of the MG-modification argpyrimidine in human diabetic heart and in rat cardiomyoblasts grown under hyperglycemic conditions. Left ventricular myocardial samples from explanted hearts of patients with cardiomyopathy with (n=8) or without DM (n=8) as well as nonfailing donor organs (n=6), and rat cardiac myoblasts H9c2 treated with glucose were screened for the MG-modification argpyrimidine. The small heat shock protein 27 (Hsp27) revealed to be the major argpyrimidine containing protein in cardiac tissue. Additionally, the modification of arginine leading to argpyrimidine and the phosphorylation of Hsp27 are increased in the myocardium of patients with DM. In H9c2 cells hyperglycemia leads to a decrease of the Hsp27-expression and an increase in argpyrimidine content and phosphorylation of Hsp27, which was accompanied by the induction of oxidative stress and apoptosis. This study shows an association between diabetes and increased argpyrimidine-modification of myocardial Hsp27, a protein which is involved in apoptosis, oxidative stress, and cytoskeleton stabilization.
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Affiliation(s)
- T Gawlowski
- Heart and Diabetes Center NRW, Ruhr-University Bochum for the Meta-Card Research Group, Diabetes Center, 32545 Bad Oeynhausen, Germany
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