1
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Sikder K, Phillips E, Zhong Z, Wang N, Saunders J, Mothy D, Kossenkov A, Schneider T, Nichtova Z, Csordas G, Margulies KB, Choi JC. Perinuclear damage from nuclear envelope deterioration elicits stress responses that contribute to LMNA cardiomyopathy. SCIENCE ADVANCES 2024; 10:eadh0798. [PMID: 38718107 PMCID: PMC11078192 DOI: 10.1126/sciadv.adh0798] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Accepted: 04/03/2024] [Indexed: 05/12/2024]
Abstract
Mutations in the LMNA gene encoding lamins A/C cause an array of tissue-selective diseases, with the heart being the most commonly affected organ. Despite progress in understanding the perturbations emanating from LMNA mutations, an integrative understanding of the pathogenesis underlying cardiac dysfunction remains elusive. Using a novel conditional deletion model capable of translatome profiling, we observed that cardiomyocyte-specific Lmna deletion in adult mice led to rapid cardiomyopathy with pathological remodeling. Before cardiac dysfunction, Lmna-deleted cardiomyocytes displayed nuclear abnormalities, Golgi dilation/fragmentation, and CREB3-mediated stress activation. Translatome profiling identified MED25 activation, a transcriptional cofactor that regulates Golgi stress. Autophagy is disrupted in the hearts of these mice, which can be recapitulated by disrupting the Golgi. Systemic administration of modulators of autophagy or ER stress significantly delayed cardiac dysfunction and prolonged survival. These studies support a hypothesis wherein stress responses emanating from the perinuclear space contribute to the LMNA cardiomyopathy development.
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Affiliation(s)
- Kunal Sikder
- Center for Translational Medicine, Department of Medicine, Thomas Jefferson University, Philadelphia PA, USA
| | - Elizabeth Phillips
- Center for Translational Medicine, Department of Medicine, Thomas Jefferson University, Philadelphia PA, USA
| | - Zhijiu Zhong
- Translational Research and Pathology, Thomas Jefferson University, Philadelphia, PA, USA
| | - Nadan Wang
- Center for Translational Medicine, Department of Medicine, Thomas Jefferson University, Philadelphia PA, USA
| | - Jasmine Saunders
- Center for Translational Medicine, Department of Medicine, Thomas Jefferson University, Philadelphia PA, USA
| | - David Mothy
- Center for Translational Medicine, Department of Medicine, Thomas Jefferson University, Philadelphia PA, USA
| | - Andrew Kossenkov
- Bioinformatics Facility, The Wistar Institute Cancer Center, Philadelphia, PA, USA
| | - Timothy Schneider
- Mitocare, Department of Pathology, Anatomy, and Cell Biology, Thomas Jefferson University, Philadelphia, PA, USA
| | - Zuzana Nichtova
- Mitocare, Department of Pathology, Anatomy, and Cell Biology, Thomas Jefferson University, Philadelphia, PA, USA
| | - Gyorgy Csordas
- Mitocare, Department of Pathology, Anatomy, and Cell Biology, Thomas Jefferson University, Philadelphia, PA, USA
| | - Kenneth B. Margulies
- Cardiovascular Institute, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Jason C. Choi
- Center for Translational Medicine, Department of Medicine, Thomas Jefferson University, Philadelphia PA, USA
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2
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Affiliation(s)
- Chuyan Long
- Department of Cardiovascular Medicine, The Second Affiliated Hospital of Nanchang University
| | - Xiao Liu
- Department of Cardiovascular Medicine, The Second Affiliated Hospital of Nanchang University
| | - Qinmei Xiong
- Department of Cardiovascular Medicine, The Second Affiliated Hospital of Nanchang University
| | - YuHao Su
- Department of Cardiovascular Medicine, The Second Affiliated Hospital of Nanchang University
| | - Kui Hong
- Department of Cardiovascular Medicine, The Second Affiliated Hospital of Nanchang University
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3
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Onoue K, Wakimoto H, Jiang J, Parfenov M, DePalma S, Conner D, Gorham J, McKean D, Seidman JG, Seidman CE, Saito Y. Cardiomyocyte Proliferative Capacity Is Restricted in Mice With Lmna Mutation. Front Cardiovasc Med 2021; 8:639148. [PMID: 34250035 PMCID: PMC8260675 DOI: 10.3389/fcvm.2021.639148] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2020] [Accepted: 05/21/2021] [Indexed: 02/01/2023] Open
Abstract
LMNA is one of the leading causative genes of genetically inherited dilated cardiomyopathy (DCM). Unlike most DCM-causative genes, which encode sarcomeric or sarcomere-related proteins, LMNA encodes nuclear envelope proteins, lamin A and C, and does not directly associate with contractile function. However, a mutation in this gene could lead to the development of DCM. The molecular mechanism of how LMNA mutation contributes to DCM development remains largely unclear and yet to be elucidated. The objective of this study was to clarify the mechanism of developing DCM caused by LMNA mutation. Methods and Results: We assessed cardiomyocyte phenotypes and characteristics focusing on cell cycle activity in mice with Lmna mutation. Both cell number and cell size were reduced, cardiomyocytes were immature, and cell cycle activity was retarded in Lmna mutant mice at both 5 weeks and 2 years of age. RNA-sequencing and pathway analysis revealed "proliferation of cells" had the most substantial impact on Lmna mutant mice. Cdkn1a, which encodes the cell cycle regulating protein p21, was strongly upregulated in Lmna mutants, and upregulation of p21 was confirmed by Western blot and immunostaining. DNA damage, which is known to upregulate Cdkn1a, was more abundantly detected in Lmna mutant mice. To assess the proliferative capacity of cardiomyocytes, the apex of the neonate mouse heart was resected, and recovery from the insult was observed. A restricted cardiomyocyte proliferating capacity after resecting the apex of the heart was observed in Lmna mutant mice. Conclusions: Our results strongly suggest that loss of lamin function contributes to impaired cell proliferation through cell cycle defects. The inadequate inborn or responsive cell proliferation capacity plays an essential role in developing DCM with LMNA mutation.
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Affiliation(s)
- Kenji Onoue
- Department of Cardiovascular Medicine, Nara Medical University, Kashihara, Japan.,Department of Genetics, Harvard Medical School, Boston, MA, United States
| | - Hiroko Wakimoto
- Department of Genetics, Harvard Medical School, Boston, MA, United States
| | - Jiangming Jiang
- Department of Genetics, Harvard Medical School, Boston, MA, United States
| | - Michael Parfenov
- Department of Genetics, Harvard Medical School, Boston, MA, United States
| | - Steven DePalma
- Department of Genetics, Harvard Medical School, Boston, MA, United States
| | - David Conner
- Department of Genetics, Harvard Medical School, Boston, MA, United States
| | - Joshua Gorham
- Department of Genetics, Harvard Medical School, Boston, MA, United States
| | - David McKean
- Department of Genetics, Harvard Medical School, Boston, MA, United States
| | - Jonathan G Seidman
- Department of Genetics, Harvard Medical School, Boston, MA, United States
| | - Christine E Seidman
- Department of Genetics, Harvard Medical School, Boston, MA, United States.,Division of Cardiovascular Medicine, Howard Hughes Medical Institute, Brigham and Women's Hospital, Boston, MA, United States
| | - Yoshihiko Saito
- Department of Cardiovascular Medicine, Nara Medical University, Kashihara, Japan
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4
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Meli AC. Genome protection on the move. Cardiovasc Res 2020; 116:e109-e111. [PMID: 32707575 DOI: 10.1093/cvr/cvaa189] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- Albano C Meli
- PhyMedExp, INSERM, CNRS, University of Montpellier, CHU Arnaud de Villeneuve, 34295 Montpellier Cedex 5, France
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5
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Heizer PJ, Yang Y, Tu Y, Kim PH, Chen NY, Hu Y, Yoshinaga Y, de Jong PJ, Vergnes L, Morales JE, Li RL, Jackson N, Reue K, Young SG, Fong LG. Deficiency in ZMPSTE24 and resulting farnesyl-prelamin A accumulation only modestly affect mouse adipose tissue stores. J Lipid Res 2020; 61:413-421. [PMID: 31941672 DOI: 10.1194/jlr.ra119000593] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2019] [Revised: 01/14/2020] [Indexed: 11/20/2022] Open
Abstract
Zinc metallopeptidase STE24 (ZMPSTE24) is essential for the conversion of farnesyl-prelamin A to mature lamin A, a key component of the nuclear lamina. In the absence of ZMPSTE24, farnesyl-prelamin A accumulates in the nucleus and exerts toxicity, causing a variety of disease phenotypes. By ∼4 months of age, both male and female Zmpste24 -/- mice manifest a near-complete loss of adipose tissue, but it has never been clear whether this phenotype is a direct consequence of farnesyl-prelamin A toxicity in adipocytes. To address this question, we generated a conditional knockout Zmpste24 allele and used it to create adipocyte-specific Zmpste24-knockout mice. To boost farnesyl-prelamin A levels, we bred in the "prelamin A-only" Lmna allele. Gene expression, immunoblotting, and immunohistochemistry experiments revealed that adipose tissue in these mice had decreased Zmpste24 expression along with strikingly increased accumulation of prelamin A. In male mice, Zmpste24 deficiency in adipocytes was accompanied by modest changes in adipose stores (an 11% decrease in body weight, a 23% decrease in body fat mass, and significantly smaller gonadal and inguinal white adipose depots). No changes in adipose stores were detected in female mice, likely because prelamin A expression in adipose tissue is lower in female mice. Zmpste24 deficiency in adipocytes did not alter the number of macrophages in adipose tissue, nor did it alter plasma levels of glucose, triglycerides, or fatty acids. We conclude that ZMPSTE24 deficiency in adipocytes, and the accompanying accumulation of farnesyl-prelamin A, reduces adipose tissue stores, but only modestly and only in male mice.
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Affiliation(s)
- Patrick J Heizer
- Departments of Medicine University of California, Los Angeles, Los Angeles, CA 90095
| | - Ye Yang
- Departments of Medicine University of California, Los Angeles, Los Angeles, CA 90095
| | - Yiping Tu
- Departments of Medicine University of California, Los Angeles, Los Angeles, CA 90095
| | - Paul H Kim
- Departments of Medicine University of California, Los Angeles, Los Angeles, CA 90095
| | - Natalie Y Chen
- Departments of Medicine University of California, Los Angeles, Los Angeles, CA 90095
| | - Yan Hu
- Departments of Medicine University of California, Los Angeles, Los Angeles, CA 90095
| | - Yuko Yoshinaga
- Children's Hospital Oakland Research Institute, Oakland, CA 94609
| | - Pieter J de Jong
- Children's Hospital Oakland Research Institute, Oakland, CA 94609
| | - Laurent Vergnes
- Human Genetics, University of California, Los Angeles, Los Angeles, CA 90095
| | - Jazmin E Morales
- Departments of Medicine University of California, Los Angeles, Los Angeles, CA 90095
| | - Robert L Li
- Departments of Medicine University of California, Los Angeles, Los Angeles, CA 90095
| | - Nicholas Jackson
- Departments of Medicine University of California, Los Angeles, Los Angeles, CA 90095
| | - Karen Reue
- Human Genetics, University of California, Los Angeles, Los Angeles, CA 90095
| | - Stephen G Young
- Departments of Medicine University of California, Los Angeles, Los Angeles, CA 90095 .,Human Genetics, University of California, Los Angeles, Los Angeles, CA 90095
| | - Loren G Fong
- Departments of Medicine University of California, Los Angeles, Los Angeles, CA 90095
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6
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Yokokawa T, Ichimura S, Hijioka N, Kaneshiro T, Yoshihisa A, Kunii H, Nakazato K, Ishida T, Suzuki O, Ohno S, Aiba T, Ohtani H, Takeishi Y. Case reports of a c.475G>T, p.E159* lamin A/C mutation with a family history of conduction disorder, dilated cardiomyopathy and sudden cardiac death. BMC Cardiovasc Disord 2019; 19:298. [PMID: 31847799 PMCID: PMC6918565 DOI: 10.1186/s12872-019-01282-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2019] [Accepted: 11/27/2019] [Indexed: 11/26/2022] Open
Abstract
Background Patients with some mutations in the lamin A/C (LMNA) gene are characterized by the presence of dilated cardiomyopathy (DCM), conduction abnormalities, ventricular tachyarrhythmias (VT), and sudden cardiac death (SCD). Various clinical features have been observed among patients who have the same LMNA mutation. Here, we show a family with cardiac laminopathy with a c.475G > T, p.E159* LMNA mutation, and a family history of conduction disorder, DCM, VT, and SCD. Case presentation A proband (female) with atrial fibrillation and bradycardia was implanted with a pacemaker in her fifties. Twenty years later, she experienced a loss of consciousness due to polymorphic VT. She had a serious family history; her mother and elder sister died suddenly in their fifties and sixties, respectively, and her nephew and son were diagnosed as having DCM. Genetic screening of the proband, her son, and nephew identified a nonsense mutation (c.475G > T, p.E159*) in the LMNA gene. Although the proband’s left ventricular ejection fraction remained relatively preserved, her son and nephew’s left ventricular ejection fraction were reduced, resulting in cardiac resynchronization therapy by implantation of a defibrillator. Conclusions In this family with cardiac laminopathy with a c.475G > T, p.E159* LMNA mutation, DCM, SCD, and malignant VT occurred. Clinical manifestation of various atrial and ventricular arrhythmias and heart failure with reduced ejection fraction occurred in an age-dependent manner in all family members who had the nonsense mutation. It appears highly likely that the E159* LMNA mutation is related to various cardiac problems in the family of the current report.
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Affiliation(s)
- Tetsuro Yokokawa
- Department of Cardiovascular Medicine, Fukushima Medical University, 1 Hikarigaoka, Fukushima, 960-1295, Japan. .,Department of Pulmonary Hypertension, Fukushima Medical University, Fukushima, Japan.
| | - Shohei Ichimura
- Department of Cardiovascular Medicine, Fukushima Medical University, 1 Hikarigaoka, Fukushima, 960-1295, Japan
| | - Naoko Hijioka
- Department of Cardiovascular Medicine, Fukushima Medical University, 1 Hikarigaoka, Fukushima, 960-1295, Japan
| | - Takashi Kaneshiro
- Department of Cardiovascular Medicine, Fukushima Medical University, 1 Hikarigaoka, Fukushima, 960-1295, Japan.,Department of Arrhythmia and Cardiac Pacing, Fukushima Medical University, Fukushima, Japan
| | - Akiomi Yoshihisa
- Department of Cardiovascular Medicine, Fukushima Medical University, 1 Hikarigaoka, Fukushima, 960-1295, Japan.,Department of Advanced Cardiac Therapeutics, Fukushima Medical University, Fukushima, Japan
| | - Hiroyuki Kunii
- Department of Cardiovascular Medicine, Fukushima Medical University, 1 Hikarigaoka, Fukushima, 960-1295, Japan
| | - Kazuhiko Nakazato
- Department of Cardiovascular Medicine, Fukushima Medical University, 1 Hikarigaoka, Fukushima, 960-1295, Japan
| | - Takafumi Ishida
- Department of Cardiovascular Medicine, Fukushima Medical University, 1 Hikarigaoka, Fukushima, 960-1295, Japan
| | - Osamu Suzuki
- Department of Diagnostic Pathology, Fukushima Medical University, Fukushima, Japan
| | - Seiko Ohno
- Department of Bioscience and Genetics, National Cerebral and Cardiovascular Center, Suita, Japan.,Department of Cardiovascular Medicine, Shiga University of Medical Science, Otsu, Japan
| | - Takeshi Aiba
- Department of Cardiovascular Medicine, National Cerebral and Cardiovascular Center, Suita, Japan
| | - Hiroshi Ohtani
- Department of Cardiovascular Medicine, Iwase General Hospital, Fukushima, Japan
| | - Yasuchika Takeishi
- Department of Cardiovascular Medicine, Fukushima Medical University, 1 Hikarigaoka, Fukushima, 960-1295, Japan
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7
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Wada E, Kato M, Yamashita K, Kokuba H, Liang WC, Bonne G, Hayashi YK. Deficiency of emerin contributes differently to the pathogenesis of skeletal and cardiac muscles in LmnaH222P/H222P mutant mice. PLoS One 2019; 14:e0221512. [PMID: 31430335 PMCID: PMC6701770 DOI: 10.1371/journal.pone.0221512] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2019] [Accepted: 08/08/2019] [Indexed: 11/18/2022] Open
Abstract
Laminopathies are tissue-selective diseases that affect differently in organ systems. Mutations in nuclear envelopes, emerin (Emd) and lamin A/C (Lmna) genes, cause clinically indistinguishable myopathy called Emery-Dreifuss muscular dystrophy (EDMD) and limb-girdle muscular dystrophy. Several murine models for EDMD have been generated; however, emerin-null (Emd) mice do not show obvious skeletal and cardiac muscle phenotypes, and Lmna H222P/H222P mutant (H222P) mice show only a mild phenotype in skeletal muscle when they already have severe cardiomyopathy. Thus, the underlying molecular mechanism of muscle involvement due to nuclear abnormalities is still unclarified. We generated double mutant (Emd-/-/LmnaH222P/H222P; EH) mice to characterize dystrophic changes and to elucidate interactions between emerin and lamin A/C in skeletal and cardiac muscles. As H222P mice, EH mice grow normally and have breeding productivity. EH mice showed severer muscle involvement compared with that of H222P mice which was an independent of cardiac abnormality at 12 weeks of age. Nuclear abnormalities, reduced muscle fiber size and increased fibrosis were prominent in EH mice. Roles of emerin and lamin A/C in satellite cells function and regeneration of muscle fiber were also evaluated by cardiotoxin-induced muscle injury. Delayed increases in myog and myh3 expression were seen in both H222P and EH mice; however, the expression levels of those genes were similar with control and regenerated muscle fiber size was not different at day 7 after injury. These results indicate that EH mouse is a suitable model for studying skeletal muscle involvement, independent of cardiac function, in laminopathies and an interaction between emerin and lamin A/C in different tissues.
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Affiliation(s)
- Eiji Wada
- Department of Pathophysiology, Tokyo Medical University, Tokyo, Japan
| | - Megumi Kato
- Department of Pathophysiology, Tokyo Medical University, Tokyo, Japan
| | - Kaori Yamashita
- Department of Pathophysiology, Tokyo Medical University, Tokyo, Japan
| | - Hiroko Kokuba
- Institute of Medical Science, Tokyo Medical University, Tokyo, Japan
| | - Wen-Chen Liang
- Department of Pediatrics, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan
- Department of Pediatrics, School of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Gisèle Bonne
- Sorbonne Université, Inserm UMRS 974, Center of Research in Myology, Paris, France
| | - Yukiko K. Hayashi
- Department of Pathophysiology, Tokyo Medical University, Tokyo, Japan
- * E-mail:
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8
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Fischer KE, Riddle NC. Sex Differences in Aging: Genomic Instability. J Gerontol A Biol Sci Med Sci 2019; 73:166-174. [PMID: 28575157 DOI: 10.1093/gerona/glx105] [Citation(s) in RCA: 56] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2017] [Accepted: 05/26/2017] [Indexed: 11/13/2022] Open
Abstract
Aging is characterized by decreasing physiological integration, reduced function, loss of resilience, and increased risk of death. Paradoxically, although women live longer, they suffer greater morbidity particularly late in life. These sex differences in human lifespan and healthspan are consistently observed in all countries and during every era for which reliable data exist. While these differences are ubiquitous in humans, evidence of sex differences in longevity and health for other species is more equivocal. Among fruit flies, nematodes, and mice, sex differences in lifespan vary depending on strain and treatment. In this review, we focus on sex differences in age-related alterations in DNA damage and mutation rates, telomere attrition, epigenetics, and nuclear architecture. We find that robust sex differences exist, eg, the higher incidence of DNA damage in men compared to women, but sex differences are not often conserved between species. For most mechanisms reviewed here, there are insufficient data to make a clear determination regarding the impact of sex, largely because sex differences have not been analyzed. Overall, our findings reveal an urgent need for well-designed studies that explicitly examine sex differences in molecular drivers of aging.
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Affiliation(s)
| | - Nicole C Riddle
- Department of Biology, The University of Alabama at Birmingham
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9
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Cellular and Animal Models of Striated Muscle Laminopathies. Cells 2019; 8:cells8040291. [PMID: 30934932 PMCID: PMC6523539 DOI: 10.3390/cells8040291] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2019] [Revised: 03/18/2019] [Accepted: 03/25/2019] [Indexed: 01/12/2023] Open
Abstract
The lamin A/C (LMNA) gene codes for nuclear intermediate filaments constitutive of the nuclear lamina. LMNA has 12 exons and alternative splicing of exon 10 results in two major isoforms—lamins A and C. Mutations found throughout the LMNA gene cause a group of diseases collectively known as laminopathies, of which the type, diversity, penetrance and severity of phenotypes can vary from one individual to the other, even between individuals carrying the same mutation. The majority of the laminopathies affect cardiac and/or skeletal muscles. The underlying molecular mechanisms contributing to such tissue-specific phenotypes caused by mutations in a ubiquitously expressed gene are not yet well elucidated. This review will explore the different phenotypes observed in established models of striated muscle laminopathies and their respective contributions to advancing our understanding of cardiac and skeletal muscle-related laminopathies. Potential future directions for developing effective treatments for patients with lamin A/C mutation-associated cardiac and/or skeletal muscle conditions will be discussed.
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10
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Choi JC, Wu W, Phillips E, Plevin R, Sera F, Homma S, Worman HJ. Elevated dual specificity protein phosphatase 4 in cardiomyopathy caused by lamin A/C gene mutation is primarily ERK1/2-dependent and its depletion improves cardiac function and survival. Hum Mol Genet 2019; 27:2290-2305. [PMID: 29668927 DOI: 10.1093/hmg/ddy134] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2018] [Accepted: 04/09/2018] [Indexed: 12/30/2022] Open
Abstract
Mutations in the lamin A/C gene (LMNA) encoding the nuclear intermediate filament proteins lamins A and C cause a group of tissue-selective diseases, the most common of which is dilated cardiomyopathy (herein referred to as LMNA cardiomyopathy) with variable skeletal muscle involvement. We previously showed that cardiomyocyte-specific overexpression of dual specificity protein phosphatase 4 (DUSP4) is involved in the pathogenesis of LMNA cardiomyopathy. However, how mutations in LMNA activate Dusp4 expression and whether it is necessary for the development of LMNA cardiomyopathy are currently unknown. We now show that female LmnaH222P/H222P mice, a model for LMNA cardiomyopathy, have increased Dusp4 expression and hyperactivation of extracellular signal-regulated kinase (ERK) 1/2 with delayed kinetics relative to male mice, consistent with the sex-dependent delay in the onset and progression of disease. Mechanistically, we show that the H222P amino acid substitution in lamin A enhances its binding to ERK1/2 and increases sequestration at the nuclear envelope. Finally, we show that genetic deletion of Dusp4 has beneficial effects on heart function and prolongs survival in LmnaH222P/H222P mice. These results further establish Dusp4 as a key contributor to the pathogenesis of LMNA cardiomyopathy and a potential target for drug therapy.
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Affiliation(s)
- Jason C Choi
- Department of Medicine, Center for Translational Medicine, Thomas Jefferson University, Philadelphia, PA 19107, USA
| | - Wei Wu
- Department of Medicine, Vagelos College of Physicians and Surgeons, Columbia University, New York, NY 10032, USA.,Department of Pathology and Cell Biology, Vagelos College of Physicians and Surgeons, Columbia University, New York, NY 10032, USA
| | - Elizabeth Phillips
- Department of Medicine, Center for Translational Medicine, Thomas Jefferson University, Philadelphia, PA 19107, USA
| | - Robin Plevin
- Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, Glasgow G4 0RE, UK
| | - Fusako Sera
- Department of Medicine, Vagelos College of Physicians and Surgeons, Columbia University, New York, NY 10032, USA
| | - Shunichi Homma
- Department of Medicine, Vagelos College of Physicians and Surgeons, Columbia University, New York, NY 10032, USA
| | - Howard J Worman
- Department of Medicine, Vagelos College of Physicians and Surgeons, Columbia University, New York, NY 10032, USA.,Department of Pathology and Cell Biology, Vagelos College of Physicians and Surgeons, Columbia University, New York, NY 10032, USA
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11
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Kessler EL, Rivaud MR, Vos MA, van Veen TAB. Sex-specific influence on cardiac structural remodeling and therapy in cardiovascular disease. Biol Sex Differ 2019; 10:7. [PMID: 30717770 PMCID: PMC6360698 DOI: 10.1186/s13293-019-0223-0] [Citation(s) in RCA: 58] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/11/2018] [Accepted: 01/24/2019] [Indexed: 01/19/2023] Open
Abstract
Background Cardiovascular diseases (CVDs) culminating into heart failure (HF) are major causes of death in men and women. Prevalence and manifestation, however, differ between sexes, since men mainly present with coronary artery disease (CAD) and myocardial infarction (MI), and post-menopausal women predominantly present with hypertension. These discrepancies are probably influenced by underlying genetic and molecular differences in structural remodeling pathways involved in hypertrophy, inflammation, fibrosis, and apoptosis. In general, men mainly develop eccentric forms, while women develop concentric forms of hypertrophy. Besides that, women show less inflammation, fibrosis, and apoptosis upon HF. This seems to emerge, at least partially, from the fact that the underlying pathways might be modulated by estrogen, which changes after menopause due to declining of the estrogen levels. Conclusion In this review, sex-dependent alterations in adverse cardiac remodeling are discussed for various CVDs. Moreover, potential therapeutic options, like estrogen treatment, are reviewed.
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Affiliation(s)
- Elise L Kessler
- Department of Medical Physiology, Division of Heart and Lungs, University Medical Center, Utrecht, Utrecht University, Yalelaan 50, 3584CM, Utrecht, The Netherlands. .,Department of Experimental Cardiology, Division of Heart and Lungs, University Medical Center, Utrecht, Utrecht University, P.O.Box 85500, Heidelberglaan 100, Utrecht, 3584CT, The Netherlands.
| | - Mathilde R Rivaud
- Department of Medical Physiology, Division of Heart and Lungs, University Medical Center, Utrecht, Utrecht University, Yalelaan 50, 3584CM, Utrecht, The Netherlands.,Department of Clinical and Experimental Cardiology, Heart Center, Academic Medical Center, Amsterdam, The Netherlands
| | - Marc A Vos
- Department of Medical Physiology, Division of Heart and Lungs, University Medical Center, Utrecht, Utrecht University, Yalelaan 50, 3584CM, Utrecht, The Netherlands
| | - Toon A B van Veen
- Department of Medical Physiology, Division of Heart and Lungs, University Medical Center, Utrecht, Utrecht University, Yalelaan 50, 3584CM, Utrecht, The Netherlands
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12
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Han M, Zhao M, Cheng C, Huang Y, Han S, Li W, Tu X, Luo X, Yu X, Liu Y, Chen Q, Ren X, Wang QK, Ke T. Lamin A mutation impairs interaction with nucleoporin NUP155 and disrupts nucleocytoplasmic transport in atrial fibrillation. Hum Mutat 2018; 40:310-325. [PMID: 30488537 DOI: 10.1002/humu.23691] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2018] [Revised: 11/19/2018] [Accepted: 11/26/2018] [Indexed: 12/19/2022]
Abstract
Atrial fibrillation (AF) is the most common cardiac arrhythmia. Here, we show the identification and functional characterization of one AF-associated mutation p.Arg399Cys in lamin A/C. Co-immunoprecipitation and GST pull-down assays demonstrate that lamin A/C interacts with NUP155, which is a nucleoporin and causes AF when mutated. Lamin A/C mutation p.Arg399Cys impairs the interaction between lamin A/C and NUP155, and increases extractability of NUP155 from the nuclear envelope (NE). Mutation p.Arg399Cys leads to aggregation of lamin A/C in the nucleus, although it does not impair the integrity of NE upon cellular stress. Mutation p.Arg399Cys inhibits the export of HSP70 mRNA and the nuclear import of HSP70 protein. Electrophysiological studies show that mutation p.Arg399Cys decreases the peak cardiac sodium current by decreasing the cell surface expression level of cardiac sodium channel Nav 1.5, but does not affect IKr potassium current. In conclusion, our results indicate that lamin A/C mutation p.Arg399Cys weakens the interaction between nuclear lamina (lamin A/C) and the nuclear pore complex (NUP155), leading to the development of AF. The findings provide a novel molecular mechanism for the pathogenesis of AF.
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Affiliation(s)
- Meng Han
- The Key Laboratory of Molecular Biophysics of the Ministry of Education, College of Life Science and Technology, Center for Human Genome Research, Cardio-X Institute, Huazhong University of Science and Technology, Wuhan, P. R. China
| | - Miao Zhao
- The Key Laboratory of Molecular Biophysics of the Ministry of Education, College of Life Science and Technology, Center for Human Genome Research, Cardio-X Institute, Huazhong University of Science and Technology, Wuhan, P. R. China
| | - Chen Cheng
- The Key Laboratory of Molecular Biophysics of the Ministry of Education, College of Life Science and Technology, Center for Human Genome Research, Cardio-X Institute, Huazhong University of Science and Technology, Wuhan, P. R. China
| | - Yuan Huang
- National "111" Center for Cellular Regulation and Molecular Pharmaceutics, Hubei University of Technology, Wuhan, P. R. China
| | - Shengna Han
- Department of Pharmacology, Basic Medical College, Zhengzhou University, Zhengzhou, P. R. China
| | - Wenjuan Li
- The Key Laboratory of Molecular Biophysics of the Ministry of Education, College of Life Science and Technology, Center for Human Genome Research, Cardio-X Institute, Huazhong University of Science and Technology, Wuhan, P. R. China
| | - Xin Tu
- The Key Laboratory of Molecular Biophysics of the Ministry of Education, College of Life Science and Technology, Center for Human Genome Research, Cardio-X Institute, Huazhong University of Science and Technology, Wuhan, P. R. China
| | - Xuan Luo
- The Key Laboratory of Molecular Biophysics of the Ministry of Education, College of Life Science and Technology, Center for Human Genome Research, Cardio-X Institute, Huazhong University of Science and Technology, Wuhan, P. R. China
| | - Xiaoling Yu
- The Key Laboratory of Molecular Biophysics of the Ministry of Education, College of Life Science and Technology, Center for Human Genome Research, Cardio-X Institute, Huazhong University of Science and Technology, Wuhan, P. R. China
| | - Yinan Liu
- The Key Laboratory of Molecular Biophysics of the Ministry of Education, College of Life Science and Technology, Center for Human Genome Research, Cardio-X Institute, Huazhong University of Science and Technology, Wuhan, P. R. China
| | - Qiuyun Chen
- Center for Cardiovascular Genetics, Department of Molecular Cardiology, Lerner Research Institute, Department of Cardiovascular Medicine, Cleveland Clinic, Cleveland, Ohio
- Department of Molecular Medicine, Department of Genetics and Genome Sciences, Case Western Reserve University, Cleveland, Ohio
| | - Xiang Ren
- The Key Laboratory of Molecular Biophysics of the Ministry of Education, College of Life Science and Technology, Center for Human Genome Research, Cardio-X Institute, Huazhong University of Science and Technology, Wuhan, P. R. China
| | - Qing Kenneth Wang
- The Key Laboratory of Molecular Biophysics of the Ministry of Education, College of Life Science and Technology, Center for Human Genome Research, Cardio-X Institute, Huazhong University of Science and Technology, Wuhan, P. R. China
- Center for Cardiovascular Genetics, Department of Molecular Cardiology, Lerner Research Institute, Department of Cardiovascular Medicine, Cleveland Clinic, Cleveland, Ohio
- Department of Molecular Medicine, Department of Genetics and Genome Sciences, Case Western Reserve University, Cleveland, Ohio
| | - Tie Ke
- The Key Laboratory of Molecular Biophysics of the Ministry of Education, College of Life Science and Technology, Center for Human Genome Research, Cardio-X Institute, Huazhong University of Science and Technology, Wuhan, P. R. China
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13
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Galata Z, Kloukina I, Kostavasili I, Varela A, Davos CH, Makridakis M, Bonne G, Capetanaki Y. Amelioration of desmin network defects by αB-crystallin overexpression confers cardioprotection in a mouse model of dilated cardiomyopathy caused by LMNA gene mutation. J Mol Cell Cardiol 2018; 125:73-86. [PMID: 30342008 DOI: 10.1016/j.yjmcc.2018.10.017] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/15/2018] [Revised: 10/02/2018] [Accepted: 10/16/2018] [Indexed: 10/28/2022]
Abstract
The link between the cytoplasmic desmin intermediate filaments and those of nuclear lamins serves as a major integrator point for the intracellular communication between the nucleus and the cytoplasm in cardiac muscle. We investigated the involvement of desmin in the cardiomyopathy caused by the lamin A/C gene mutation using the LmnaH222P/H222P mouse model of the disease. We demonstrate that in these mouse hearts desmin loses its normal Z disk and intercalated disc localization and presents aggregate formation along with mislocalization of basic intercalated disc protein components, as well as severe structural abnormalities of the intercalated discs and mitochondria. To address the extent by which the observed desmin network defects contribute to the progression of LmnaH222P/H222P cardiomyopathy, we investigated the consequences of desmin-targeted approaches for the disease treatment. We showed that cardiac-specific overexpression of the small heat shock protein αΒ-Crystallin confers cardioprotection in LmnaH222P/H222P mice by ameliorating desmin network defects and by attenuating the desmin-dependent mislocalization of basic intercalated disc protein components. In addition, αΒ-Crystallin overexpression rescues the intercalated disc, mitochondrial and nuclear defects of LmnaH222P/H222P hearts, as well as the abnormal activation of ERK1/2. Consistent with that, by generating the LmnaH222P/H222PDes+/- mice, we showed that the genetically decreased endogenous desmin levels have cardioprotective effects in LmnaH222P/H222P hearts since less desmin is available to form dysfunctional aggregates. In conclusion, our results demonstrate that desmin network disruption, disorganization of intercalated discs and mitochondrial defects are a major mechanism contributing to the progression of this LMNA cardiomyopathy and can be ameliorated by αΒ-Crystallin overexpression.
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Affiliation(s)
- Zoi Galata
- Center of Basic Research, Biomedical Research Foundation, Academy of Athens, Athens 11527, Greece
| | - Ismini Kloukina
- Center of Basic Research, Biomedical Research Foundation, Academy of Athens, Athens 11527, Greece
| | - Ioanna Kostavasili
- Center of Basic Research, Biomedical Research Foundation, Academy of Athens, Athens 11527, Greece
| | - Aimilia Varela
- Center of Clinical, Experimental Surgery & Translational Research, Biomedical Research Foundation, Academy of Athens, Athens 11527, Greece
| | - Constantinos H Davos
- Center of Clinical, Experimental Surgery & Translational Research, Biomedical Research Foundation, Academy of Athens, Athens 11527, Greece
| | - Manousos Makridakis
- Center of Systems Biology, Biomedical Research Foundation, Academy of Athens, Athens 11527, Greece
| | - Gisѐle Bonne
- Sorbonne Université, INSERM UMRS-974, Center for Research in Myology, Institut de Myologie, G.H. Pitié Salpêtrière, F-75651 Paris Cedex 13, France
| | - Yassemi Capetanaki
- Center of Basic Research, Biomedical Research Foundation, Academy of Athens, Athens 11527, Greece.
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14
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Affiliation(s)
- Masamichi Ito
- Department of Cardiovascular Medicine, Graduate School of Medicine, The University of Tokyo
| | - Seitaro Nomura
- Department of Cardiovascular Medicine, Graduate School of Medicine, The University of Tokyo
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15
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Nakajima K, Aiba T, Makiyama T, Nishiuchi S, Ohno S, Kato K, Yamamoto Y, Doi T, Shizuta S, Onoue K, Yagihara N, Ishikawa T, Watanabe I, Kawakami H, Oginosawa Y, Murakoshi N, Nogami A, Aonuma K, Saito Y, Kimura T, Yasuda S, Makita N, Shimizu W, Horie M, Kusano K. Clinical Manifestations and Long-Term Mortality in Lamin A/C Mutation Carriers From a Japanese Multicenter Registry. Circ J 2018; 82:2707-2714. [PMID: 30078822 DOI: 10.1253/circj.cj-18-0339] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
BACKGROUND Mutation in the lamin A/C gene (LMNA) is associated with several cardiac phenotypes, such as cardiac conduction disorders (CCD), atrial arrhythmia (AA), malignant ventricular arrhythmia (MVA) and left ventricular dysfunction (LVD), leading to sudden cardiac death (SCD) and/or end-stage heart failure. We investigated how these phenotypes are associated with each other and which of them are most important for total mortality. Methods and Results: A multicenter registry included 110 LMNA mutation carriers (age, 43±15 years, male: 62%) from 60 families. After genetic diagnosis of LMNA mutation (missense: 27%, non-missense: 73%), patients or subjects were followed to evaluate the manifestations of their phenotypes and the risk of total mortality; 90 patients could be followed (median: 5 [0-35] years). Prevalence of the 4 clinical phenotypes was significantly increased during follow-up. Among these phenotypes, AA was significantly associated with MVA. CCD was significantly associated with LVD. LVD, meanwhile, was significantly associated with CCD and MVA. Male sex was significantly associated with MVA. Furthermore, during follow-up, 17 patients died: 12 end-stage heart failure, 4 SCD and 1 stroke. LVD was the only independent predictor for all-cause death (OR: 41.7, 95% CI: 4.1-422.3; P=0.0016). CONCLUSIONS Several cardiac phenotypes were age-dependently increased in LMNA mutation carriers, suggesting that ICD or CRT-D could suppress SCD after middle age; however, LVD leading to end-stage heart failure was the only independent predictor for total mortality.
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Affiliation(s)
- Kenzaburo Nakajima
- Department of Cardiovascular Medicine, National Cerebral and Cardiovascular Center.,Department of Advanced Cardiovascular Medicine, Graduate School of Medical Sciences Kumamoto University
| | - Takeshi Aiba
- Department of Cardiovascular Medicine, National Cerebral and Cardiovascular Center.,Department of Advanced Arrhythmia and Translational Medical Science, National Cerebral and Cardiovascular Center
| | - Takeru Makiyama
- Department of Cardiovascular Medicine, Kyoto University Graduate School of Medicine
| | - Suguru Nishiuchi
- Department of Cardiovascular Medicine, Kyoto University Graduate School of Medicine
| | - Seiko Ohno
- Department of Cardiovascular and Respiratory Medicine, Shiga University of Medical Science
| | - Koichi Kato
- Department of Cardiovascular and Respiratory Medicine, Shiga University of Medical Science
| | - Yuta Yamamoto
- Department of Cardiovascular Medicine, Kyoto University Graduate School of Medicine
| | - Takahiro Doi
- Department of Cardiovascular Medicine, Kyoto University Graduate School of Medicine
| | - Satoshi Shizuta
- Department of Cardiovascular Medicine, Kyoto University Graduate School of Medicine
| | - Kenji Onoue
- Department of Cardiovascular Medicine, Nara Medical University
| | - Nobue Yagihara
- Department of Cardiovascular Biology and Medicine, Niigata University Graduate School of Medical and Dental Sciences
| | - Taisuke Ishikawa
- Department of Molecular Physiology, Nagasaki University Graduate School of Biomedical Sciences
| | - Ichiro Watanabe
- Division of Cardiology, Department of Medicine, Nihon University School of Medicine
| | - Hiroshi Kawakami
- Department of Cardiology, Pulmonology, Hypertension and Nephrology, Ehime University Graduate School of Medicine
| | - Yasushi Oginosawa
- The Second Department of Internal Medicine, University of Occupational and Environmental Health
| | | | - Akihiko Nogami
- Cardiovascular Division, Faculty of Medicine, University of Tsukuba
| | - Kazutaka Aonuma
- Cardiovascular Division, Faculty of Medicine, University of Tsukuba
| | - Yoshihiko Saito
- Department of Cardiovascular Medicine, Nara Medical University
| | - Takeshi Kimura
- Department of Cardiovascular Medicine, Kyoto University Graduate School of Medicine
| | - Satoshi Yasuda
- Department of Cardiovascular Medicine, National Cerebral and Cardiovascular Center.,Department of Advanced Cardiovascular Medicine, Graduate School of Medical Sciences Kumamoto University
| | - Naomasa Makita
- Department of Molecular Physiology, Nagasaki University Graduate School of Biomedical Sciences
| | - Wataru Shimizu
- Department of Cardiovascular Medicine, Nippon Medical School
| | - Minoru Horie
- Department of Cardiovascular and Respiratory Medicine, Shiga University of Medical Science
| | - Kengo Kusano
- Department of Cardiovascular Medicine, National Cerebral and Cardiovascular Center.,Department of Advanced Cardiovascular Medicine, Graduate School of Medical Sciences Kumamoto University
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16
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Kawakami H, Ogimoto A, Tokunaga N, Nishimura K, Kawakami H, Higashi H, Iio C, Kono T, Aono J, Uetani T, Nagai T, Inoue K, Suzuki J, Ikeda S, Okura T, Ohyagi Y, Tabara Y, Higaki J. A Novel Truncating LMNA Mutation in Patients with Cardiac Conduction Disorders and Dilated Cardiomyopathy. Int Heart J 2018; 59:531-541. [PMID: 29628476 DOI: 10.1536/ihj.17-377] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
The cardiac phenotype of laminopathies is characterized by cardiac conduction disorders (CCDs) and dilated cardiomyopathy (DCM). Although laminopathies have been considered monogenic, they exhibit a remarkable degree of clinical variability. This case series aimed to detect the causal mutation and to investigate the causes of clinical variability in a Japanese family with inherited CCD and DCM.Of the five family members investigated, four had either CCD/DCM or CCD alone, while one subject had no cardiovascular disease and acted as a normal control. We performed targeted resequencing of 174 inherited cardiovascular disease-associated genes in this family and pathological mutations were confirmed using Sanger sequencing. The degree of clinical severity and variability were also evaluated using long-term medical records. We discovered a novel heterozygous truncating lamin A/C (LMNA) mutation (c.774delG) in all four subjects with CCD. Because this mutation was predicted to cause a frameshift mutation and premature termination (p.Gln258HisfsTer222) in LMNA, we believe that this LMNA mutation was the causal mutation in this family with CCD and laminopathies. In addition, gender-specific intra-familiar clinical variability was observed in this Japanese family where affected males exhibited an earlier onset of CCD and more severe DCM compared to affected females. Using targeted resequencing, we discovered a novel truncating LMNA mutation associated with CCD and DCM in this family characterized by gender differences in clinical severity in LMNA carriers. Our results suggest that in patients with laminopathy, clinical severity may be the result of multiple factors.
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Affiliation(s)
- Hiroshi Kawakami
- Department of Cardiology, Pulmonology, Hypertension & Nephrology, Ehime University Graduate School of Medicine
| | - Akiyoshi Ogimoto
- Department of Cardiology, Pulmonology, Hypertension & Nephrology, Ehime University Graduate School of Medicine
| | - Naohito Tokunaga
- Department of Cardiology, Pulmonology, Hypertension & Nephrology, Ehime University Graduate School of Medicine
| | - Kazuhisa Nishimura
- Department of Cardiology, Pulmonology, Hypertension & Nephrology, Ehime University Graduate School of Medicine
| | - Hideo Kawakami
- Department of Cardiology, Ehime Prefectural Imabari Hospital
| | - Haruhiko Higashi
- Department of Cardiology, Pulmonology, Hypertension & Nephrology, Ehime University Graduate School of Medicine
| | - Chiharuko Iio
- Department of Cardiology, Pulmonology, Hypertension & Nephrology, Ehime University Graduate School of Medicine
| | - Tamami Kono
- Department of Cardiology, Pulmonology, Hypertension & Nephrology, Ehime University Graduate School of Medicine
| | - Jun Aono
- Department of Cardiology, Pulmonology, Hypertension & Nephrology, Ehime University Graduate School of Medicine
| | - Teruyoshi Uetani
- Department of Cardiology, Pulmonology, Hypertension & Nephrology, Ehime University Graduate School of Medicine
| | - Takayuki Nagai
- Department of Cardiology, Pulmonology, Hypertension & Nephrology, Ehime University Graduate School of Medicine
| | - Katsuji Inoue
- Department of Cardiology, Pulmonology, Hypertension & Nephrology, Ehime University Graduate School of Medicine
| | - Jun Suzuki
- Department of Cardiology, Pulmonology, Hypertension & Nephrology, Ehime University Graduate School of Medicine
| | - Shuntaro Ikeda
- Department of Cardiology, Pulmonology, Hypertension & Nephrology, Ehime University Graduate School of Medicine
| | - Takafumi Okura
- Department of Cardiology, Pulmonology, Hypertension & Nephrology, Ehime University Graduate School of Medicine
| | - Yasumasa Ohyagi
- Department of Geriatric Medicine, Ehime University Graduate School of Medicine
| | - Yasuharu Tabara
- Center for Genomic Medicine, Kyoto University Graduate School of Medicine
| | - Jitsuo Higaki
- Department of Cardiology, Pulmonology, Hypertension & Nephrology, Ehime University Graduate School of Medicine
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17
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Arimura T, Muchir A, Kuwahara M, Morimoto S, Ishikawa T, Du CK, Zhan DY, Nakao S, Machida N, Tanaka R, Yamane Y, Hayashi T, Kimura A. Overexpression of heart-specific small subunit of myosin light chain phosphatase results in heart failure and conduction disturbance. Am J Physiol Heart Circ Physiol 2018; 314:H1192-H1202. [PMID: 29451818 DOI: 10.1152/ajpheart.00696.2017] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Mutations in genes encoding components of the sarcomere cause cardiomyopathy, which is often associated with abnormal Ca2+ sensitivity of muscle contraction. We have previously shown that a heart-specific myosin light chain phosphatase small subunit (hHS-M21) increases the Ca2+ sensitivity of muscle contraction. The aim of the present study was to investigate the function of hHS-M21 in vivo and the causative role of abnormal Ca2+ sensitivity in cardiomyopathy. We generated transgenic mice with cardiac-specific overexpression of hHS-M21. We confirmed that hHS-M21 increased the Ca2+ sensitivity of cardiac muscle contraction in vivo, which was not followed by an increased phosphorylation of myosin light chain 2 isoforms. hHS-M21 transgenic mice developed severe systolic dysfunction with myocardial fibrosis and degeneration of cardiomyocytes in association with sinus bradycardia and atrioventricular conduction defect. The contractile dysfunction and cardiac fibrosis were improved by treatment with the Rho kinase inhibitor fasudil. Our findings suggested that the overexpression of hHS-M21 results in cardiac dysfunction and conduction disturbance via non-myosin light chain 2 phosphorylation-dependent regulation. NEW & NOTEWORTHY The present study is the first to develop mice with transgenic overexpression of a heart-specific myosin light chain phosphatase small subunit (hHS-M21) and to examine the effects of hHS-M21 on cardiac function. Elevation of hHS-M21 induced heart failure with myocardial fibrosis and degeneration of cardiomyocytes accompanied by supraventricular arrhythmias.
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Affiliation(s)
- Takuro Arimura
- Department of Molecular Pathogenesis, Medical Research Institute, Tokyo Medical and Dental University , Tokyo , Japan
| | - Antoine Muchir
- Department of Medicine and Department of Pathology and Cell Biology, College of Physicians and Surgeons, Columbia University , Columbia, New York
| | - Masayoshi Kuwahara
- Department of Veterinary Pathophysiology and Animal Health, Graduate School of Agriculture and Life Sciences, The University of Tokyo , Tokyo , Japan
| | - Sachio Morimoto
- Department of Clinical Pharmacology, Graduate School of Medical Sciences, Kyushu University , Fukuoka , Japan
| | - Taisuke Ishikawa
- Department of Molecular Pathogenesis, Medical Research Institute, Tokyo Medical and Dental University , Tokyo , Japan
| | - Cheng-Kun Du
- Department of Clinical Pharmacology, Graduate School of Medical Sciences, Kyushu University , Fukuoka , Japan
| | - Dong-Yun Zhan
- Department of Clinical Pharmacology, Graduate School of Medical Sciences, Kyushu University , Fukuoka , Japan
| | - Shu Nakao
- Department of Veterinary Clinical Oncology, Faculty of Agriculture, Tokyo University of Agriculture and Technology , Tokyo , Japan
| | - Noboru Machida
- Department of Veterinary Clinical Oncology, Faculty of Agriculture, Tokyo University of Agriculture and Technology , Tokyo , Japan
| | - Ryo Tanaka
- Department of Veterinary Surgery, Faculty of Agriculture, Tokyo University of Agriculture and Technology , Tokyo , Japan
| | - Yoshihisa Yamane
- Department of Veterinary Surgery, Faculty of Agriculture, Tokyo University of Agriculture and Technology , Tokyo , Japan
| | - Takeharu Hayashi
- Department of Molecular Pathogenesis, Medical Research Institute, Tokyo Medical and Dental University , Tokyo , Japan
| | - Akinori Kimura
- Department of Molecular Pathogenesis, Medical Research Institute, Tokyo Medical and Dental University , Tokyo , Japan
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18
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Captur G, Arbustini E, Bonne G, Syrris P, Mills K, Wahbi K, Mohiddin SA, McKenna WJ, Pettit S, Ho CY, Muchir A, Gissen P, Elliott PM, Moon JC. Lamin and the heart. Heart 2017; 104:468-479. [DOI: 10.1136/heartjnl-2017-312338] [Citation(s) in RCA: 81] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/21/2017] [Revised: 10/17/2017] [Accepted: 10/19/2017] [Indexed: 11/04/2022] Open
Abstract
Lamins A and C are intermediate filament nuclear envelope proteins encoded by the LMNA gene. Mutations in LMNA cause autosomal dominant severe heart disease, accounting for 10% of dilated cardiomyopathy (DCM). Characterised by progressive conduction system disease, arrhythmia and systolic impairment, lamin A/C heart disease is more malignant than other common DCMs due to high event rates even when the left ventricular impairment is mild. It has several phenotypic mimics, but overall it is likely to be an under-recognised cause of DCM. In certain clinical scenarios, particularly familial DCM with early conduction disease, the pretest probability of finding an LMNA mutation may be quite high.Recognising lamin A/C heart disease is important because implantable cardioverter defibrillators need to be implanted early. Promising oral drug therapies are within reach thanks to research into the mitogen-activated protein kinase (MAPK) and affiliated pathways. Personalised heart failure therapy may soon become feasible for LMNA, alongside personalised risk stratification, as variant-related differences in phenotype severity and clinical course are being steadily elucidated.Genotyping and family screening are clinically important both to confirm and to exclude LMNA mutations, but it is the three-pronged integration of such genetic information with functional data from in vivo cardiomyocyte mechanics, and pathological data from microscopy of the nuclear envelope, that is properly reshaping our LMNA knowledge base, one variant at a time. This review explains the biology of lamin A/C heart disease (genetics, structure and function of lamins), clinical presentation (diagnostic pointers, electrocardiographic and imaging features), aspects of screening and management, including current uncertainties, and future directions.
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19
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Rafiq MA, Chaudhry A, Care M, Spears DA, Morel CF, Hamilton RM. Whole exome sequencing identified 1 base pair novel deletion in BCL2-associated athanogene 3 (BAG3) gene associated with severe dilated cardiomyopathy (DCM) requiring heart transplant in multiple family members. Am J Med Genet A 2017; 173:699-705. [PMID: 28211974 DOI: 10.1002/ajmg.a.38087] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2015] [Accepted: 11/15/2016] [Indexed: 02/03/2023]
Abstract
Dilated cardiomyopathy (DCM) is characterized by dilation and impaired contraction of the left ventricle or both ventricles. Among hereditary DCM, the genetic causes are heterogeneous, and include mutations encoding cytoskeletal, nucleoskeletal, mitochondrial, and calcium-handling proteins. We report three severely affected males, in a four-generation pedigree, with DCM phenotype who underwent cardiac transplant. Cardiomegaly with marked biventricular dilation and fibrosis were noticeable histopathological findings. The affected males had tested negative on a 46-gene pancardiomyopathy panel. Whole Exome Sequencing (WES) was performed to reveal mutation in the gene responsible in generation of DCM phenotypes. The 1-bp (Chr10:121435979delC; c.913delC) novel heterozygous deletion in exon 4 of BAG3, was identified in three affected males, resulted in frame-shift and a premature termination codon (p.Met306-Stop) producing a truncated BAG3 protein lacking functionally important PXXP and BAG domains. WES data were further utilized to map 10 SNP markers around the discovered mutation to generate shared disease haplotype in all affected individuals encompassing 11 Mb on 10q25.3-26.2 harboring BAG3. Finally genotypes were inferred for the unavailable/deceased individuals in the pedigrees. Here we propose that Chr10:121435979delC in BAG3 is a causal mutation in these subjects. Our and earlier studies indicate that BAG3 mutations are associated with DCM phenotypes. BAG3 should be added to cardiomyopathy gene panels for screening of DCM patients, and patients previously considered gene elusive should undergo sequencing of the BAG3 gene. © 2017 Wiley Periodicals, Inc.
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Affiliation(s)
- Muhammad Arshad Rafiq
- Physiology and Experimental Medicine, The Hospital for Sick Children and Research Institute, Toronto, Ontario, Canada.,Department of Bio-Sciences, COMSATS Institute of Information Technology (CIIT), Islamabad, Pakistan
| | - Ayeshah Chaudhry
- Division of Clinical and Metabolic Genetics, The Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada
| | - Melanie Care
- Fred A. Litwin Family Center in Genetic Medicine, University Health Network, University of Toronto, Toronto, Ontario, Canada
| | - Danna A Spears
- Division of Cardiology, University Health Network, University of Toronto, Toronto, Ontario, Canada
| | - Chantal F Morel
- Fred A. Litwin Family Center in Genetic Medicine, University Health Network, University of Toronto, Toronto, Ontario, Canada
| | - Robert M Hamilton
- Physiology and Experimental Medicine, The Hospital for Sick Children and Research Institute, Toronto, Ontario, Canada
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20
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Tsuji M, Kawasaki T, Matsuda T, Arai T, Gojo S, Takeuchi JK. Sexual dimorphisms of mRNA and miRNA in human/murine heart disease. PLoS One 2017; 12:e0177988. [PMID: 28704447 PMCID: PMC5509429 DOI: 10.1371/journal.pone.0177988] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2016] [Accepted: 05/05/2017] [Indexed: 01/08/2023] Open
Abstract
BACKGROUND Sexual dimorphisms are well recognized in various cardiac diseases such as ischemic cardiomyopathy (ICM), hypertrophic cardiomyopathy (HCM) and dilated cardiomyopathy (DCM). Thorough understanding of the underlying genetic programs is crucial to optimize treatment strategies specified for each gender. By performing meta-analysis and microarray analysis, we sought to comprehensively characterize the sexual dimorphisms in the healthy and diseased heart at the level of both mRNA and miRNA transcriptome. RESULTS Existing mRNA microarray data of both mouse and human heart were integrated, identifying dozens/ hundreds of sexually dimorphic genes in healthy heart, ICM, HCM, and DCM. These sexually dimorphic genes overrepresented gene ontologies (GOs) important for cardiac homeostasis. Further, microarray of miRNA, isolated from mouse sham left ventricle (LV) (n = 6 & n = 5 for male & female) and chronic MI LV (n = 19 & n = 19) and from human normal LV (n = 6 & n = 6) and ICM LV (n = 4 & n = 5), was conducted. This revealed that 13 mouse miRNAs are sexually dimorphic in MI and 6 in normal heart. In human, 3 miRNAs were sexually dimorphic in ICM and 15 in normal heart. These data revealed miRNA-mRNA networks that operate in a sexually-biased fashion. CONCLUSIONS mRNA and miRNA transcriptome of normal and disease heart show significant sex differences, which might impact the cardiac homeostasis. Together this study provides the first comprehensive picture of the genome-wide program underlying the heart sexual dimorphisms, laying the foundation for gender specific treatment strategies.
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Affiliation(s)
- Masato Tsuji
- Division of Bio-informational Pharmacology, Medical Research Institute, Tokyo Medical Dental University, Tokyo, Japan
- Department of Biological Sciences, Graduate School of Science, The University of Tokyo, Tokyo, Japan
- * E-mail: (MT); (JKT)
| | - Takanori Kawasaki
- Department of Cardiovascular Medicine, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Takeru Matsuda
- Department of Mathematical Informatics, Graduate School of Information Science and Technology, The University of Tokyo, Tokyo, Japan
| | - Tomio Arai
- Department of Pathology, Tokyo Metropolitan Geriatric Hospital and Institute of Gerontology, Tokyo, Japan
| | - Satoshi Gojo
- Department of Cardiovascular Medicine, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Jun K. Takeuchi
- Division of Bio-informational Pharmacology, Medical Research Institute, Tokyo Medical Dental University, Tokyo, Japan
- Department of Biological Sciences, Graduate School of Science, The University of Tokyo, Tokyo, Japan
- * E-mail: (MT); (JKT)
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21
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Kato K, Takahashi N, Fujii Y, Umehara A, Nishiuchi S, Makiyama T, Ohno S, Horie M. LMNA cardiomyopathy detected in Japanese arrhythmogenic right ventricular cardiomyopathy cohort. J Cardiol 2016; 68:346-51. [DOI: 10.1016/j.jjcc.2015.10.013] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/19/2015] [Revised: 10/01/2015] [Accepted: 10/05/2015] [Indexed: 12/19/2022]
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22
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Lee YK, Jiang Y, Ran XR, Lau YM, Ng KM, Lai WHK, Siu CW, Tse HF. Recent advances in animal and human pluripotent stem cell modeling of cardiac laminopathy. Stem Cell Res Ther 2016; 7:139. [PMID: 27649756 PMCID: PMC5029055 DOI: 10.1186/s13287-016-0401-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
Laminopathy is a disease closely related to deficiency of the nuclear matrix protein lamin A/C or failure in prelamin A processing, and leads to accumulation of the misfold protein causing progeria. The resultant disrupted lamin function is highly associated with abnormal nuclear architecture, cell senescence, apoptosis, and unstable genome integrity. To date, the effects of loss in nuclear integrity on the susceptible organ, striated muscle, have been commonly associated with muscular dystrophy, dilated cardiac myopathy (DCM), and conduction defeats, but have not been studied intensively. In this review, we aim to summarize recent breakthroughs in an in vivo laminopathy model and in vitro study using patient-specific human induced pluripotent stem cells (iPSCs) that reproduce the pathophysiological phenotype for further drug screening. We describe several in-vivo transgenic mouse models to elucidate the effects of Lmna H222P, N195K mutations, and LMNA knockout on cardiac function, in terms of hemodynamic and electrical signal propagation; certain strategies targeted on stress-related MAPK are mentioned. We will also discuss human iPSC cardiomyocytes serving as a platform to reveal the underlying mechanisms, such as the altered mechanical sensation in electrical coupling of the heart conduction system and ion channel alternation in relation to altered nuclear architecture, and furthermore to enable screening of drugs that can attenuate this cardiac premature aging phenotype by inhibition of prelamin misfolding and oxidative stress, and also enhancement of autophagy protein clearance and cardiac-protective microRNA.
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Affiliation(s)
- Yee-Ki Lee
- Cardiology Division, Department of Medicine, Li Ka Shing Faculty of Medicine, University of Hong Kong, Queen Mary Hospital, Hong Kong, People's Republic of China.,Hong Kong-Guangdong Joint Laboratory on Stem Cell and Regenerative Medicine, University of Hong Kong and Guangzhou Institutes of Biomedicine and Health, Guangzhou, People's Republic of China
| | - Yu Jiang
- Cardiology Division, Department of Medicine, Li Ka Shing Faculty of Medicine, University of Hong Kong, Queen Mary Hospital, Hong Kong, People's Republic of China.,Hong Kong-Guangdong Joint Laboratory on Stem Cell and Regenerative Medicine, University of Hong Kong and Guangzhou Institutes of Biomedicine and Health, Guangzhou, People's Republic of China
| | - Xin-Ru Ran
- Cardiology Division, Department of Medicine, Li Ka Shing Faculty of Medicine, University of Hong Kong, Queen Mary Hospital, Hong Kong, People's Republic of China.,Hong Kong-Guangdong Joint Laboratory on Stem Cell and Regenerative Medicine, University of Hong Kong and Guangzhou Institutes of Biomedicine and Health, Guangzhou, People's Republic of China
| | - Yee-Man Lau
- Cardiology Division, Department of Medicine, Li Ka Shing Faculty of Medicine, University of Hong Kong, Queen Mary Hospital, Hong Kong, People's Republic of China.,Hong Kong-Guangdong Joint Laboratory on Stem Cell and Regenerative Medicine, University of Hong Kong and Guangzhou Institutes of Biomedicine and Health, Guangzhou, People's Republic of China
| | - Kwong-Man Ng
- Cardiology Division, Department of Medicine, Li Ka Shing Faculty of Medicine, University of Hong Kong, Queen Mary Hospital, Hong Kong, People's Republic of China.,Hong Kong-Guangdong Joint Laboratory on Stem Cell and Regenerative Medicine, University of Hong Kong and Guangzhou Institutes of Biomedicine and Health, Guangzhou, People's Republic of China
| | - Wing-Hon Kevin Lai
- Cardiology Division, Department of Medicine, Li Ka Shing Faculty of Medicine, University of Hong Kong, Queen Mary Hospital, Hong Kong, People's Republic of China.,Hong Kong-Guangdong Joint Laboratory on Stem Cell and Regenerative Medicine, University of Hong Kong and Guangzhou Institutes of Biomedicine and Health, Guangzhou, People's Republic of China
| | - Chung-Wah Siu
- Cardiology Division, Department of Medicine, Li Ka Shing Faculty of Medicine, University of Hong Kong, Queen Mary Hospital, Hong Kong, People's Republic of China
| | - Hung-Fat Tse
- Cardiology Division, Department of Medicine, Li Ka Shing Faculty of Medicine, University of Hong Kong, Queen Mary Hospital, Hong Kong, People's Republic of China. .,Hong Kong-Guangdong Joint Laboratory on Stem Cell and Regenerative Medicine, University of Hong Kong and Guangzhou Institutes of Biomedicine and Health, Guangzhou, People's Republic of China. .,Shenzhen Institutes of Research and Innovation, University of Hong Kong, Hong Kong, SAR, China.
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23
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The effect of the lamin A and its mutants on nuclear structure, cell proliferation, protein stability, and mobility in embryonic cells. Chromosoma 2016; 126:501-517. [PMID: 27534416 PMCID: PMC5509783 DOI: 10.1007/s00412-016-0610-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2016] [Revised: 07/11/2016] [Accepted: 08/02/2016] [Indexed: 01/26/2023]
Abstract
LMNA gene encodes for nuclear intermediate filament proteins lamin A/C. Mutations in this gene lead to a spectrum of genetic disorders, collectively referred to as laminopathies. Lamin A/C are widely expressed in most differentiated somatic cells but not in early embryos and some undifferentiated cells. To investigate the role of lamin A/C in cell phenotype maintenance and differentiation, which could be a determinant of the pathogenesis of laminopathies, we examined the role played by exogenous lamin A and its mutants in differentiated cell lines (HeLa, NHDF) and less-differentiated HEK 293 cells. We introduced exogenous wild-type and mutated (H222P, L263P, E358K D446V, and ∆50) lamin A into different cell types and analyzed proteins’ impact on proliferation, protein mobility, and endogenous nuclear envelope protein distribution. The mutants give rise to a broad spectrum of nuclear phenotypes and relocate lamin C. The mutations ∆50 and D446V enhance proliferation in comparison to wild-type lamin A and control cells, but no changes in exogenous protein mobility measured by FRAP were observed. Interestingly, although transcripts for lamins A and C are at similar level in HEK 293 cells, only lamin C protein is detected in western blots. Also, exogenous lamin A and its mutants, when expressed in HEK 293 cells underwent posttranscriptional processing. Overall, our results provide new insight into the maintenance of lamin A in less-differentiated cells. Embryonic cells are very sensitive to lamin A imbalance, and its upregulation disturbs lamin C, which may influence gene expression and many regulatory pathways.
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24
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Skeletal Muscle Laminopathies: A Review of Clinical and Molecular Features. Cells 2016; 5:cells5030033. [PMID: 27529282 PMCID: PMC5040975 DOI: 10.3390/cells5030033] [Citation(s) in RCA: 60] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2016] [Revised: 06/01/2016] [Accepted: 06/08/2016] [Indexed: 01/12/2023] Open
Abstract
LMNA-related disorders are caused by mutations in the LMNA gene, which encodes for the nuclear envelope proteins, lamin A and C, via alternative splicing. Laminopathies are associated with a wide range of disease phenotypes, including neuromuscular, cardiac, metabolic disorders and premature aging syndromes. The most frequent diseases associated with mutations in the LMNA gene are characterized by skeletal and cardiac muscle involvement. This review will focus on genetics and clinical features of laminopathies affecting primarily skeletal muscle. Although only symptomatic treatment is available for these patients, many achievements have been made in clarifying the pathogenesis and improving the management of these diseases.
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25
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Zaragoza MV, Fung L, Jensen E, Oh F, Cung K, McCarthy LA, Tran CK, Hoang V, Hakim SA, Grosberg A. Exome Sequencing Identifies a Novel LMNA Splice-Site Mutation and Multigenic Heterozygosity of Potential Modifiers in a Family with Sick Sinus Syndrome, Dilated Cardiomyopathy, and Sudden Cardiac Death. PLoS One 2016; 11:e0155421. [PMID: 27182706 PMCID: PMC4868298 DOI: 10.1371/journal.pone.0155421] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2016] [Accepted: 04/28/2016] [Indexed: 11/18/2022] Open
Abstract
The goals are to understand the primary genetic mechanisms that cause Sick Sinus Syndrome and to identify potential modifiers that may result in intrafamilial variability within a multigenerational family. The proband is a 63-year-old male with a family history of individuals (>10) with sinus node dysfunction, ventricular arrhythmia, cardiomyopathy, heart failure, and sudden death. We used exome sequencing of a single individual to identify a novel LMNA mutation and demonstrated the importance of Sanger validation and family studies when evaluating candidates. After initial single-gene studies were negative, we conducted exome sequencing for the proband which produced 9 gigabases of sequencing data. Bioinformatics analysis showed 94% of the reads mapped to the reference and identified 128,563 unique variants with 108,795 (85%) located in 16,319 genes of 19,056 target genes. We discovered multiple variants in known arrhythmia, cardiomyopathy, or ion channel associated genes that may serve as potential modifiers in disease expression. To identify candidate mutations, we focused on ~2,000 variants located in 237 genes of 283 known arrhythmia, cardiomyopathy, or ion channel associated genes. We filtered the candidates to 41 variants in 33 genes using zygosity, protein impact, database searches, and clinical association. Only 21 of 41 (51%) variants were validated by Sanger sequencing. We selected nine confirmed variants with minor allele frequencies <1% for family studies. The results identified LMNA c.357-2A>G, a novel heterozygous splice-site mutation as the primary mutation with rare or novel variants in HCN4, MYBPC3, PKP4, TMPO, TTN, DMPK and KCNJ10 as potential modifiers and a mechanism consistent with haploinsufficiency.
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Affiliation(s)
- Michael V. Zaragoza
- UC Irvine Cardiogenomics Program, Department of Pediatrics, Division of Genetics & Genomics and Department of Biological Sciences, University of California Irvine, Irvine, California, United States of America
- * E-mail:
| | - Lianna Fung
- UC Irvine Cardiogenomics Program, Department of Pediatrics, Division of Genetics & Genomics and Department of Biological Sciences, University of California Irvine, Irvine, California, United States of America
| | - Ember Jensen
- UC Irvine Cardiogenomics Program, Department of Pediatrics, Division of Genetics & Genomics and Department of Biological Sciences, University of California Irvine, Irvine, California, United States of America
| | - Frances Oh
- UC Irvine Cardiogenomics Program, Department of Pediatrics, Division of Genetics & Genomics and Department of Biological Sciences, University of California Irvine, Irvine, California, United States of America
| | - Katherine Cung
- UC Irvine Cardiogenomics Program, Department of Pediatrics, Division of Genetics & Genomics and Department of Biological Sciences, University of California Irvine, Irvine, California, United States of America
| | - Linda A. McCarthy
- Department of Biomedical Engineering and The Edwards Lifesciences Center for Advanced Cardiovascular Technology, University of California Irvine, Irvine, California, United States of America
| | - Christine K. Tran
- UC Irvine Cardiogenomics Program, Department of Pediatrics, Division of Genetics & Genomics and Department of Biological Sciences, University of California Irvine, Irvine, California, United States of America
| | - Van Hoang
- UC Irvine Cardiogenomics Program, Department of Pediatrics, Division of Genetics & Genomics and Department of Biological Sciences, University of California Irvine, Irvine, California, United States of America
| | - Simin A. Hakim
- UC Irvine Cardiogenomics Program, Department of Pediatrics, Division of Genetics & Genomics and Department of Biological Sciences, University of California Irvine, Irvine, California, United States of America
| | - Anna Grosberg
- Department of Biomedical Engineering and The Edwards Lifesciences Center for Advanced Cardiovascular Technology, University of California Irvine, Irvine, California, United States of America
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26
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Field J, Ye DZ, Shinde M, Liu F, Schillinger KJ, Lu M, Wang T, Skettini M, Xiong Y, Brice AK, Chung DC, Patel VV. CAP2 in cardiac conduction, sudden cardiac death and eye development. Sci Rep 2015; 5:17256. [PMID: 26616005 PMCID: PMC4663486 DOI: 10.1038/srep17256] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2015] [Accepted: 10/14/2015] [Indexed: 02/03/2023] Open
Abstract
Sudden cardiac death kills 180,000 to 450,000 Americans annually, predominantly males. A locus that confers a risk for sudden cardiac death, cardiac conduction disease, and a newly described developmental disorder (6p22 syndrome) is located at 6p22. One gene at 6p22 is CAP2, which encodes a cytoskeletal protein that regulates actin dynamics. To determine the role of CAP2 in vivo, we generated knockout (KO) mice. cap2−/cap2− males were underrepresented at weaning and ~70% died by 12 weeks of age, but cap2−/cap2− females survived at close to the expected levels and lived normal life spans. CAP2 knockouts resembled patients with 6p22 syndrome in that mice were smaller and they developed microphthalmia and cardiac disease. The cardiac disease included cardiac conduction disease (CCD) and, after six months of age, dilated cardiomyopathy (DCM), most noticeably in the males. To address the mechanisms underlying these phenotypes, we used Cre-mediated recombination to knock out CAP2 in cardiomyocytes. We found that the mice developed CCD, leading to sudden cardiac death from complete heart block, but no longer developed DCM or the other phenotypes, including sex bias. These studies establish a direct role for CAP2 and actin dynamics in sudden cardiac death and cardiac conduction disease.
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Affiliation(s)
- Jeffrey Field
- Department of Systems Pharmacology and Translational Therapeutics, University of Pennsylvania Perelman School of Medicine Philadelphia, Pennsylvania 19041 USA
| | - Diana Z Ye
- Department of Systems Pharmacology and Translational Therapeutics, University of Pennsylvania Perelman School of Medicine Philadelphia, Pennsylvania 19041 USA
| | - Manasi Shinde
- Department of Systems Pharmacology and Translational Therapeutics, University of Pennsylvania Perelman School of Medicine Philadelphia, Pennsylvania 19041 USA
| | - Fang Liu
- Cardiovascular Institute, University of Pennsylvania Perelman School of Medicine Philadelphia, Pennsylvania 19041 USA
| | - Kurt J Schillinger
- Cardiovascular Institute, University of Pennsylvania Perelman School of Medicine Philadelphia, Pennsylvania 19041 USA.,Section of Cardiac Electrophysiology, University of Pennsylvania Perelman School of Medicine Philadelphia, Pennsylvania 19041 USA
| | - MinMin Lu
- Cardiovascular Institute, University of Pennsylvania Perelman School of Medicine Philadelphia, Pennsylvania 19041 USA
| | - Tao Wang
- Cardiovascular Institute, University of Pennsylvania Perelman School of Medicine Philadelphia, Pennsylvania 19041 USA
| | - Michelle Skettini
- Department of Systems Pharmacology and Translational Therapeutics, University of Pennsylvania Perelman School of Medicine Philadelphia, Pennsylvania 19041 USA
| | - Yao Xiong
- Department of Systems Pharmacology and Translational Therapeutics, University of Pennsylvania Perelman School of Medicine Philadelphia, Pennsylvania 19041 USA
| | - Angela K Brice
- University Laboratory Animal Resources and School of Veterinary Medicine, Department of Pathobiology, University of Pennsylvania, Philadelphia, Pennsylvania
| | - Daniel C Chung
- Scheie Eye Institute, University of Pennsylvania Perelman School of Medicine, Pennsylvania 19041 USA
| | - Vickas V Patel
- Cardiovascular Institute, University of Pennsylvania Perelman School of Medicine Philadelphia, Pennsylvania 19041 USA.,Section of Cardiac Electrophysiology, University of Pennsylvania Perelman School of Medicine Philadelphia, Pennsylvania 19041 USA
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27
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Ishikawa T, Tsuji Y, Makita N. Inherited bradyarrhythmia: A diverse genetic background. J Arrhythm 2015; 32:352-358. [PMID: 27761158 PMCID: PMC5063261 DOI: 10.1016/j.joa.2015.09.009] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2015] [Revised: 09/03/2015] [Accepted: 09/16/2015] [Indexed: 12/31/2022] Open
Abstract
Bradyarrhythmia is a common heart rhythm abnormality comprising number of diseases and is associated with decreased heart rate due to the failure of action potential generation and propagation at the sinus node. Permanent pacemaker implantation is often used therapeutically to compensate for decreased heart rate and cardiac output. The vast majority of bradyarrhythmia cases are attributable either to aging or to structural abnormalities of the cardiac conduction system, caused by underlying structural heart disease. However, there is a subset of bradyarrhythmia primarily caused by genetic defects in the absence of aging or underlying structural heart disease. These include several genes that play principal roles in cardiac electrophysiology, heart development, cardioprotection, and the structural integrity of the membrane and sarcomere. Recent advances in the functional analysis of mutations using a heterologous expression system and genetically engineered animal models have provided significant insights into the underlying molecular mechanisms responsible for inherited arrhythmia. In this review, current understandings of the genetic and molecular basis of inherited bradyarrhythmia are presented.
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Affiliation(s)
- Taisuke Ishikawa
- Department of Molecular Physiology, Nagasaki University Graduate School of Biomedical Sciences, 1-12-4 Sakamoto, Nagasaki 852-8523, Japan
| | - Yukiomi Tsuji
- Department of Molecular Physiology, Nagasaki University Graduate School of Biomedical Sciences, 1-12-4 Sakamoto, Nagasaki 852-8523, Japan
| | - Naomasa Makita
- Department of Molecular Physiology, Nagasaki University Graduate School of Biomedical Sciences, 1-12-4 Sakamoto, Nagasaki 852-8523, Japan
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28
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Abstract
Recent studies show that nuclear lamins, the type V intermediate filament proteins, are required for proper building of at least some organs. As the major structural components of the nuclear lamina found underneath the inner nuclear membranes, lamins are ubiquitously expressed in all animal cells. How the broadly expressed lamins support the building of specific tissues is not understood. By studying Drosophila testis, we have uncovered a mechanism by which lamin-B functions in the cyst stem cell (CySC) and its differentiated cyst cell, the cell types known to form the niche/microenvironment for the germline stem cells (GSC) and the developing germ line, to ensure testis organogenesis (1). In this extra view, we discuss some remaining questions and the implications of our findings in the understanding of how the ubiquitous nuclear lamina regulates tissue building in a context-dependent manner.
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Affiliation(s)
- Haiyang Chen
- a Department of Embryology; Carnegie Institution for Science; Baltimore, MD USA
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29
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Kimura A. Molecular genetics and pathogenesis of cardiomyopathy. J Hum Genet 2015; 61:41-50. [PMID: 26178429 DOI: 10.1038/jhg.2015.83] [Citation(s) in RCA: 76] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2015] [Accepted: 06/15/2015] [Indexed: 12/19/2022]
Abstract
Cardiomyopathy is defined as a disease of functional impairment in the cardiac muscle and its etiology includes both extrinsic and intrinsic factors. Cardiomyopathy caused by the intrinsic factors is called as primary cardiomyopathy of which two major clinical phenotypes are hypertrophic cardiomyopathy (HCM) and dilated cardiomyopathy (DCM). Genetic approaches have revealed the disease genes for hereditary primary cardiomyopathy and functional studies have demonstrated that characteristic functional alterations induced by the disease-associated mutations are closely related to the clinical types, such that increased and decreased Ca(2+) sensitivities of muscle contraction are associated with HCM and DCM, respectively. In addition, recent studies have suggested that mutations in the Z-disc components found in HCM and DCM may result in increased and decreased stiffness of sarcomere, respectively. Moreover, functional analysis of mutations in the other components of cardiac muscle have suggested that the altered response to metabolic stresses is associated with cardiomyopathy, further indicating the heterogeneity in the etiology and pathogenesis of cardiomyopathy.
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Affiliation(s)
- Akinori Kimura
- Department of Molecular Pathogenesis, Medical Research Institute, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
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30
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Carmosino M, Torretta S, Procino G, Gerbino A, Forleo C, Favale S, Svelto M. Role of nuclear Lamin A/C in cardiomyocyte functions. Biol Cell 2014; 106:346-58. [PMID: 25055884 DOI: 10.1111/boc.201400033] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2014] [Accepted: 07/16/2014] [Indexed: 12/21/2022]
Abstract
Lamin A/C is a structural protein of the nuclear envelope (NE) and cardiac involvement in Lamin A/C mutations was one of the first phenotypes to be reported in humans, suggesting a crucial role of this protein in the cardiomyocytes function. Mutations in LMNA gene cause a class of pathologies generically named 'Lamanopathies' mainly involving heart and skeletal muscles. Moreover, the well-known disease called Hutchinson-Gilford Progeria Syndrome due to extensive mutations in LMNA gene, in addition to the systemic phenotype of premature aging, is characterised by the death of patients at around 13 typically for a heart attack or stroke, suggesting again the heart as the main site sensitive to Lamin A/C disfunction. Indeed, the identification of the roles of the Lamin A/C in cardiomyocytes function is a key area of exploration. One of the primary biological roles recently conferred to Lamin A/C is to affect contractile cells lineage determination and senescence. Then, in differentiated adult cardiomyocytes both the 'structural' and 'gene expression hypothesis' could explain the role of Lamin A in the function of cardiomyocytes. In fact, recent advances in the field propose that the structural weakness/stiffness of the NE, regulated by Lamin A/C amount in NE, can 'consequently' alter gene expression.
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Affiliation(s)
- Monica Carmosino
- Department of Sciences, University of Basilicata, Potenza, Italy; Department of Biosciences, Biotechnologies and Biopharmaceutics, University of Bari, Bari, Italy
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31
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Arimura T, Takeya R, Ishikawa T, Yamano T, Matsuo A, Tatsumi T, Nomura T, Sumimoto H, Kimura A. Dilated cardiomyopathy-associated FHOD3 variant impairs the ability to induce activation of transcription factor serum response factor. Circ J 2014; 77:2990-6. [PMID: 24088304 DOI: 10.1253/circj.cj-13-0255] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
BACKGROUND Dilated cardiomyopathy (DCM) is characterized by a dilated left ventricular cavity with systolic dysfunction manifested by heart failure. It has been revealed that mutations in genes for cytoskeleton or sarcomere proteins cause DCM. However, the disease-causing mutations can be found only in far less than half of patients with a family history, indicating that there should be other disease genes for DCM. Formin homology 2 domain containing 3 (FHOD3) is a sarcomeric protein expressed in the heart that plays an essential role in sarcomere organization during myofibrillogenesis. The purpose of this study was to explore a possible novel disease gene for DCM. METHODS AND RESULTS We analyzed 48 Japanese familial DCM patients for mutations in FHOD3, and a missense variant, Tyr1249Asn, which was predicted to modify the 3D structure and damage protein function, was found in a case with adult-onset DCM. Functional studies revealed that the DCM-associated mutation significantly reduced the ability to induce actin dynamics-dependent activation of serum response factor, although no remarkable change in the cellular localization was induced in neonatal rat cardiomyocytes transfected with a mutant construct of FHOD3. CONCLUSIONS The DCM-associated FHOD3 variant may cause DCM by interfering with actin filament assembly.
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Affiliation(s)
- Takuro Arimura
- Department of Molecular Pathogenesis, Medical Research Institute, Tokyo Medical and Dental University
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32
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Milting H, Klauke B, Christensen AH, Musebeck J, Walhorn V, Grannemann S, Munnich T, ari T, Rasmussen TB, Jensen HK, Mogensen J, Baecker C, Romaker E, Laser KT, zu Knyphausen E, Kassner A, Gummert J, Judge DP, Connors S, Hodgkinson K, Young TL, van der Zwaag PA, van Tintelen JP, Anselmetti D. The TMEM43 Newfoundland mutation p.S358L causing ARVC-5 was imported from Europe and increases the stiffness of the cell nucleus. Eur Heart J 2014; 36:872-81. [DOI: 10.1093/eurheartj/ehu077] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/05/2013] [Accepted: 02/03/2014] [Indexed: 02/03/2023] Open
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Van Tintelen JP, Pieper PG, Van Spaendonck-Zwarts KY, Van Den Berg MP. Pregnancy, cardiomyopathies, and genetics. Cardiovasc Res 2014; 101:571-8. [PMID: 24451172 DOI: 10.1093/cvr/cvu014] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Although familial forms of cardiomyopathy such as hypertrophic or dilated cardiomyopathy have been recognized for decades, it is only recently that much of the genetic basis of these inherited cardiomyopathies has been elucidated. This has provided important insights into the pathophysiological mechanisms underlying the disease phenotype. This increased knowledge and the availability of genetic testing has resulted in increasing numbers of mutation carriers who are being monitored, including many who are now of child-bearing age. Pregnancy is generally well tolerated in asymptomatic patients or mutation carriers with inherited cardiomyopathies. However, since pregnancy leads to major physiological changes in the cardiovascular system, in women with genetic cardiomyopathies or who carry a mutation pre-disposing to a genetic cardiomyopathy, pregnancy entails a risk of developing heart failure and/or arrhythmias. This deterioration of cardiac function may occur despite optimal medical treatment. Advanced left ventricular dysfunction, poor functional class (NYHA class III or IV), or prior cardiac events appear to increase the risk of maternal cardiac complications. However, there are no large series of cardiomyopathy patients who are regularly evaluated for cardiac complications during pregnancy and for certain types of inherited cardiomyopathy, only case reports on individual pregnancies are available. Pre-conception cardiologic evaluation and genetic counselling are important for every woman with a cardiomyopathy or a cardiomyopathy-related mutation who is considering having a family. In this article, we give an overview of the basic clinical aspects, genetics, and pregnancy outcome in women with different types of inherited cardiomyopathies. We also discuss the genetic aspects of pregnancy-associated cardiomyopathy, including peripartum cardiomyopathy.
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Affiliation(s)
- J Peter Van Tintelen
- Department of Genetics, University of Groningen, University Medical Center Groningen, PO Box 30001, 9700 RB, Groningen, the Netherlands
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34
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Meyer S, van der Meer P, van Tintelen JP, van den Berg MP. Sex differences in cardiomyopathies. Eur J Heart Fail 2014; 16:238-47. [PMID: 24464619 DOI: 10.1002/ejhf.15] [Citation(s) in RCA: 63] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/12/2013] [Revised: 09/26/2013] [Accepted: 10/01/2013] [Indexed: 12/16/2022] Open
Abstract
Cardiomyopathies are a heterogeneous group of heart muscle diseases with a variety of specific phenotypes. According to the contemporary European Society of Cardiology classification, they are classified into hypertrophic (HCM), dilated (DCM), arrhythmogenic right ventricular (ARVC), restrictive (RCM), and unclassified cardiomyopathies. Each class is aetiologically further categorized into inherited (familial) and non-inherited (non-familial) forms. There is substantial evidence that biological sex is a strong modulator of the clinical manifestation of these cardiomyopathies, and sex-specific characteristics are detectable in all classes. For the clinician, it is important to know the sex-specific aspects of clinical disease expression and the potential modes of inheritance or the hereditary influences underlying the development of cardiomyopathies, since these may aid in diagnosing such diseases in both sexes.
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Affiliation(s)
- Sven Meyer
- Department of Cardiology, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
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35
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Abstract
Lamins A and C, encoded by LMNA, are constituent of the nuclear lamina, a meshwork of proteins underneath the nuclear envelope first described as scaffolding proteins of the nucleus. Since the discovery of LMNA mutations in highly heterogeneous human disorders (including cardiac and muscular dystrophies, lipodystrophies and progeria), the number of functions described for lamin A/C has expanded. Lamin A/C is notably involved in the regulation of chromatin structure and gene transcription, and in the resistance of cells to mechanical stress. This review focuses on studies performed on knock-out and knock-in Lmna mouse models, which have led to decipher some of the lamin A/C functions in striated muscles and to the first preclinical trials of pharmaceutical therapies.
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