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En A, Bogireddi H, Thomas B, Stutzman AV, Ikegami S, LaForest B, Almakki O, Pytel P, Moskowitz IP, Ikegami K. Pervasive nuclear envelope ruptures precede ECM signaling and disease onset without activating cGAS-STING in Lamin-cardiomyopathy mice. Cell Rep 2024; 43:114284. [PMID: 38814785 DOI: 10.1016/j.celrep.2024.114284] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2023] [Revised: 04/14/2024] [Accepted: 05/13/2024] [Indexed: 06/01/2024] Open
Abstract
Nuclear envelope (NE) ruptures are emerging observations in Lamin-related dilated cardiomyopathy, an adult-onset disease caused by loss-of-function mutations in Lamin A/C, a nuclear lamina component. Here, we test a prevailing hypothesis that NE ruptures trigger the pathological cGAS-STING cytosolic DNA-sensing pathway using a mouse model of Lamin cardiomyopathy. The reduction of Lamin A/C in cardio-myocyte of adult mice causes pervasive NE ruptures in cardiomyocytes, preceding inflammatory transcription, fibrosis, and fatal dilated cardiomyopathy. NE ruptures are followed by DNA damage accumulation without causing immediate cardiomyocyte death. However, cGAS-STING-dependent inflammatory signaling remains inactive. Deleting cGas or Sting does not rescue cardiomyopathy in the mouse model. The lack of cGAS-STING activation is likely due to the near absence of cGAS expression in adult cardiomyocytes at baseline. Instead, extracellular matrix (ECM) signaling is activated and predicted to initiate pro-inflammatory communication from Lamin-reduced cardiomyocytes to fibroblasts. Our work nominates ECM signaling, not cGAS-STING, as a potential inflammatory contributor in Lamin cardiomyopathy.
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Affiliation(s)
- Atsuki En
- Division of Molecular Cardiovascular Biology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH 45229, USA; Graduate School of Nanobioscience, Yokohama City University, Yokohama, Kanagawa 236-0027, Japan
| | - Hanumakumar Bogireddi
- Division of Molecular Cardiovascular Biology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH 45229, USA
| | - Briana Thomas
- Division of Molecular Cardiovascular Biology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH 45229, USA
| | - Alexis V Stutzman
- Department of Pediatrics, the University of Chicago, Chicago, IL 60637, USA
| | - Sachie Ikegami
- Department of Pediatrics, the University of Chicago, Chicago, IL 60637, USA
| | - Brigitte LaForest
- Department of Pediatrics, the University of Chicago, Chicago, IL 60637, USA
| | - Omar Almakki
- Department of Pediatrics, the University of Chicago, Chicago, IL 60637, USA
| | - Peter Pytel
- Department of Pathology, the University of Chicago, Chicago, IL 60637, USA
| | - Ivan P Moskowitz
- Department of Pediatrics, the University of Chicago, Chicago, IL 60637, USA; Department of Pathology, the University of Chicago, Chicago, IL 60637, USA; Department of Human Genetics, the University of Chicago, Chicago, IL 60637, USA
| | - Kohta Ikegami
- Division of Molecular Cardiovascular Biology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH 45229, USA; Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH 45267, USA.
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Matter A, Kaufman C, Zürcher N, Lenggenhager D, Grehten P, Bartholdi D, Horka L, Häberle J, Makris G. LEMD2-associated progeroid syndrome: Expanding the phenotype of the nuclear envelopathy caused by a defect in LEMD2 gene. Aging Cell 2024:e14189. [PMID: 38757373 DOI: 10.1111/acel.14189] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2024] [Revised: 03/27/2024] [Accepted: 04/19/2024] [Indexed: 05/18/2024] Open
Abstract
Nuclear envelopathies are rare genetic diseases that compromise the integrity of the nuclear envelope. Patients with a defect in LEM domain nuclear envelope protein 2 (LEMD2) leading to LEMD2-associated progeroid syndrome are exceedingly scarce in number, yet they exhibit shared clinical features including skeletal abnormalities and a prematurely-aged appearance. Our study broadens the understanding of LEMD2-associated progeroid syndrome by detailing its phenotypic and molecular characteristics in the first female and fourth reported case, highlighting a distinct impact on metabolic functions. The patient's history revealed growth delay, facial and skeletal abnormalities, and recurrent abdominal pain crises caused by hepatomegaly. Comparisons with the previously documented cases emphasized similarities in skeletal and facial features while showcasing unique variations, notably in cardiac and hepatic manifestations. In vitro experiments conducted on patient-derived peripheral blood and urinary epithelial cells and LEMD2-downregulated HepG2 cells confirmed abnormalities in the structure of the nuclear envelope in all three tissue-types. Overall, our work offers a comprehensive profile of a patient with LEMD2-related syndrome, emphasizing the hepatic involvement in the disease and broadening our understanding of clinical and molecular implications. This study not only contributes specific insights into LEMD2-related conditions but also underscores potential therapeutic paths for disorders affecting nuclear envelope dynamics.
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Affiliation(s)
- Alyssia Matter
- Division of Metabolism and Children's Research Center, University Children's Hospital Zurich, Zurich, Switzerland
| | - Christina Kaufman
- Division of Metabolism and Children's Research Center, University Children's Hospital Zurich, Zurich, Switzerland
| | - Nadia Zürcher
- Division of Metabolism and Children's Research Center, University Children's Hospital Zurich, Zurich, Switzerland
| | - Daniela Lenggenhager
- Department of Pathology and Molecular Pathology, University Hospital Zurich, Zurich, Switzerland
| | - Patrice Grehten
- Department of Diagnostic Imaging, University Children's Hospital Zurich, Zurich, Switzerland
| | - Deborah Bartholdi
- Department of Human Genetics, Inselspital, Bern University Hospital, Bern, Switzerland
| | - Laura Horka
- Department of Endocrinology, Diabetology and Clinical Nutrition, University Hospital Zurich, Zurich, Switzerland
| | - Johannes Häberle
- Division of Metabolism and Children's Research Center, University Children's Hospital Zurich, Zurich, Switzerland
| | - Georgios Makris
- Division of Metabolism and Children's Research Center, University Children's Hospital Zurich, Zurich, Switzerland
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van Heerden D, Klima S, van den Bout I. How nuclear envelope dynamics can direct laminopathy phenotypes. Curr Opin Cell Biol 2024; 86:102290. [PMID: 38048657 DOI: 10.1016/j.ceb.2023.102290] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 10/25/2023] [Accepted: 11/09/2023] [Indexed: 12/06/2023]
Abstract
The nuclear envelope separates the genome from the cytoplasmic environment. However, the nuclear envelope is also physically associated with the genome and exerts influence on gene expression and genome modification. The nucleus is dynamic, changing shape and responding to cell movement, disassembling and assembling during cell division, and undergoing rupture and repair. These dynamics can be impacted by genetic disease, leading to a family of diseases called laminopathies. Their disparate phenotypes suggest that multiple processes are affected. We highlight three such processes here, which we believe can be used to classify most of the laminopathies. While much still needs to be learned, some commonalities between these processes, such as proteins involved in nuclear envelope formation and rupture repair, may drive a variety of laminopathies. Here we review the latest information regarding nuclear dynamics and its role in laminopathies related to mutations in the nuclear lamina and linker of nucleoskeleton and cytoskeleton complex (LINC) proteins.
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Affiliation(s)
- David van Heerden
- Department of Physiology, Faculty of Health Sciences, University of Pretoria, South Africa; Centre for Neuroendocrinology, Department of Immunology, Faculty of Health Sciences, University of Pretoria, South Africa
| | - Stefanie Klima
- Department of Physiology, Faculty of Health Sciences, University of Pretoria, South Africa; Centre for Neuroendocrinology, Department of Immunology, Faculty of Health Sciences, University of Pretoria, South Africa
| | - Iman van den Bout
- Department of Physiology, Faculty of Health Sciences, University of Pretoria, South Africa; Centre for Neuroendocrinology, Department of Immunology, Faculty of Health Sciences, University of Pretoria, South Africa.
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Báez-Ferrer N, Díaz-Flores-Estévez F, Pérez-Cejas A, Avanzas P, Lorca R, Abreu-González P, Domínguez-Rodríguez A. Natural History of Dilated Cardiomyopathy Due to c.77T>C (p.Val26Ala) in Emerin Protein. J Clin Med 2024; 13:660. [PMID: 38337354 PMCID: PMC10856282 DOI: 10.3390/jcm13030660] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2023] [Revised: 01/12/2024] [Accepted: 01/20/2024] [Indexed: 02/12/2024] Open
Abstract
(1) Introduction: Dilated cardiomyopathy (DCM) mainly affects young individuals and is the main indication of heart transplantation. The variant c.77T>C (p.Val26Ala) of the gene coding for emerin (EMD) in chromosome Xq28 has been catalogued as a pathogenic variant for the development of DCM, exhibiting an X-linked inheritance pattern. (2) Methods: A retrospective study was conducted covering the period 2015-2023 in patients with DCM of genetic origin. The primary endpoint was patient age at onset of the first composite major cardiac event, in the form of a first episode of heart failure, malignant ventricular arrhythmia, or end-stage heart failure, according to the presence of truncating variant in titin gene (TTNtv) versus the p.Val26Ala mutation in the EMD protein. (3) Results: A total of 31 and 22 patients were included in the EMD group and TTNtv group, respectively. The primary endpoint was significantly higher in the EMD group, with a hazard ratio of 4.16 (95% confidence interval: 1.83-9.46; p = 0.001). At 55 years of age, all the patients in the EMD group had already presented heart failure, nine presented malignant ventricular arrhythmia (29%), and 13 required heart transplantation (42%). (4) Conclusions: DCM secondary to the c.77T>C (p.Val26Ala) mutation in the EMD gene is associated to an increased risk of major cardiac events compared to patients with DCM due to TTNtv, with a large proportion of transplanted patients in the fifth decade of life.
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Affiliation(s)
- Néstor Báez-Ferrer
- Cardiology Department, Hospital Universitario de Canarias, 38320 Tenerife, Spain
| | - Felícitas Díaz-Flores-Estévez
- Department of Genetics, Hospital Universitario de Canarias, 38320 Tenerife, Spain; (F.D.-F.-E.); (A.P.-C.)
- Department of Laboratory, Hospital Universitario de Canarias, 38320 Tenerife, Spain
| | - Antonia Pérez-Cejas
- Department of Genetics, Hospital Universitario de Canarias, 38320 Tenerife, Spain; (F.D.-F.-E.); (A.P.-C.)
- Department of Laboratory, Hospital Universitario de Canarias, 38320 Tenerife, Spain
| | - Pablo Avanzas
- Área del Corazón, Hospital Universitario Central Asturias, 33011 Oviedo, Spain; (P.A.); (R.L.)
- Instituto de Investigación Sanitaria del Principado de Asturias (ISPA), 33011 Oviedo, Spain
- Departamento de Medicina, Universidad de Oviedo, 33003 Oviedo, Spain
- Centro de Investigación en Red de Enfermedades Cardiovasculares (CIBERCV), 28029 Madrid, Spain
| | - Rebeca Lorca
- Área del Corazón, Hospital Universitario Central Asturias, 33011 Oviedo, Spain; (P.A.); (R.L.)
- Instituto de Investigación Sanitaria del Principado de Asturias (ISPA), 33011 Oviedo, Spain
- Departamento de Biología Funcional, Área de Fisiología, Universidad de Oviedo, 33003 Oviedo, Spain
- Unidad de Cardiopatías Familiares, Área del Corazón y Departamento de Genética Molecular, Hospital Universitario Central Asturias, 33011 Oviedo, Spain
- Redes de Investigación Cooperativa Orientadas a Resultados en Salud (RICORs), 28029 Madrid, Spain
| | - Pedro Abreu-González
- Physiology Department, Faculty of Medicine, Universidad de La Laguna, 38200 Tenerife, Spain;
| | - Alberto Domínguez-Rodríguez
- Cardiology Department, Hospital Universitario de Canarias, 38320 Tenerife, Spain
- Centro de Investigación en Red de Enfermedades Cardiovasculares (CIBERCV), 28029 Madrid, Spain
- Facultad de Ciencias de la Salud, Universidad Europea de Canarias, 38300 Tenerife, Spain
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Vargas JD. The Role of the LEMD2 p.L13R Mutation in Dilated Cardiomyopathy. Circ Res 2023; 132:185-186. [PMID: 36656966 DOI: 10.1161/circresaha.122.322352] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Jose D Vargas
- Washington DC VA Medical Center, WA, Veterans Affairs Medical Center, Washington DC
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