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Martins IQ, Cuervo M, Vilhena I. Heart transplant anesthetic approach in a patient with Emery Dreyfuss muscular dystrophy: A case report. Rev Esp Anestesiol Reanim (Engl Ed) 2023; 70:540-544. [PMID: 37678464 DOI: 10.1016/j.redare.2023.09.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2022] [Accepted: 11/17/2022] [Indexed: 09/09/2023]
Abstract
Emery-Dreifuss muscular dystrophy is associated with cardiac abnormalities and rarely heart transplantation may be the treatment of choice. In this case, a male patient with Emery- Dreifuss muscular dystrophy developed NYHA class IV heart failure at 33 years of age and was submitted to heart transplantation. Anesthesia was adapted to prevent the development of malignant hyperthermia and rhabdomyolysis. The surgery was a success and the patient's progress was extremely positive with symptomatic improvement. In these patients, is critical to adjust not only his positioning but also the therapy administered in order to reduce iatrogeny and promote a faster recovery.
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Affiliation(s)
- I Q Martins
- Department of Anesthesiology, Centro Hospitalar e Universitário de Coimbra, Coimbra, Portugal.
| | - M Cuervo
- Department of Anesthesiology, Centro Hospitalar e Universitário de Coimbra, Coimbra, Portugal
| | - I Vilhena
- Department of Anesthesiology, Centro Hospitalar e Universitário de Coimbra, Coimbra, Portugal
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2
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Elzamzami FD, Samal A, Arun AS, Dharmaraj T, Prasad NR, Rendon-Jonguitud A, DeVine L, Walston JD, Cole RN, Wilson KL. Native lamin A/C proteomes and novel partners from heart and skeletal muscle in a mouse chronic inflammation model of human frailty. Front Cell Dev Biol 2023; 11:1240285. [PMID: 37936983 PMCID: PMC10626543 DOI: 10.3389/fcell.2023.1240285] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2023] [Accepted: 10/05/2023] [Indexed: 11/09/2023] Open
Abstract
Clinical frailty affects ∼10% of people over age 65 and is studied in a chronically inflamed (Interleukin-10 knockout; "IL10-KO") mouse model. Frailty phenotypes overlap the spectrum of diseases ("laminopathies") caused by mutations in LMNA. LMNA encodes nuclear intermediate filament proteins lamin A and lamin C ("lamin A/C"), important for tissue-specific signaling, metabolism and chromatin regulation. We hypothesized that wildtype lamin A/C associations with tissue-specific partners are perturbed by chronic inflammation, potentially contributing to dysfunction in frailty. To test this idea we immunoprecipitated native lamin A/C and associated proteins from skeletal muscle, hearts and brains of old (21-22 months) IL10-KO versus control C57Bl/6 female mice, and labeled with Tandem Mass Tags for identification and quantitation by mass spectrometry. We identified 502 candidate lamin-binding proteins from skeletal muscle, and 340 from heart, including 62 proteins identified in both tissues. Candidates included frailty phenotype-relevant proteins Perm1 and Fam210a, and nuclear membrane protein Tmem38a, required for muscle-specific genome organization. These and most other candidates were unaffected by IL10-KO, but still important as potential lamin A/C-binding proteins in native heart or muscle. A subset of candidates (21 in skeletal muscle, 30 in heart) showed significantly different lamin A/C-association in an IL10-KO tissue (p < 0.05), including AldoA and Gins3 affected in heart, and Lmcd1 and Fabp4 affected in skeletal muscle. To screen for binding, eleven candidates plus prelamin A and emerin controls were arrayed as synthetic 20-mer peptides (7-residue stagger) and incubated with recombinant purified lamin A "tail" residues 385-646 under relatively stringent conditions. We detected strong lamin A binding to peptides solvent exposed in Lmcd1, AldoA, Perm1, and Tmem38a, and plausible binding to Csrp3 (muscle LIM protein). These results validated both proteomes as sources for native lamin A/C-binding proteins in heart and muscle, identified four candidate genes for Emery-Dreifuss muscular dystrophy (CSRP3, LMCD1, ALDOA, and PERM1), support a lamin A-interactive molecular role for Tmem38A, and supported the hypothesis that lamin A/C interactions with at least two partners (AldoA in heart, transcription factor Lmcd1 in muscle) are altered in the IL10-KO model of frailty.
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Affiliation(s)
- Fatima D. Elzamzami
- Department of Cell Biology, Johns Hopkins University School of Medicine, Baltimore, MD, United States
| | - Arushi Samal
- Department of Cell Biology, Johns Hopkins University School of Medicine, Baltimore, MD, United States
| | - Adith S. Arun
- Department of Cell Biology, Johns Hopkins University School of Medicine, Baltimore, MD, United States
| | - Tejas Dharmaraj
- Department of Cell Biology, Johns Hopkins University School of Medicine, Baltimore, MD, United States
| | - Neeti R. Prasad
- Department of Cell Biology, Johns Hopkins University School of Medicine, Baltimore, MD, United States
| | - Alex Rendon-Jonguitud
- Department of Cell Biology, Johns Hopkins University School of Medicine, Baltimore, MD, United States
| | - Lauren DeVine
- Department of Biological Chemistry, Johns Hopkins University School of Medicine, Baltimore, MD, United States
| | - Jeremy D. Walston
- Division of Geriatric Medicine and Gerontology, Johns Hopkins University School of Medicine, Baltimore, MD, United States
| | - Robert N. Cole
- Department of Biological Chemistry, Johns Hopkins University School of Medicine, Baltimore, MD, United States
| | - Katherine L. Wilson
- Department of Cell Biology, Johns Hopkins University School of Medicine, Baltimore, MD, United States
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3
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Xie Y, Luo J, Zhong J, Liu X, Tang J, Lan D. Detection of gonosomal mosaicism by ultra-deep sequencing and droplet digital PCR in patients with Emery-Dreifuss muscular dystrophy. Mol Genet Genomic Med 2023:e2161. [PMID: 36897110 DOI: 10.1002/mgg3.2161] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2022] [Revised: 01/12/2023] [Accepted: 02/15/2023] [Indexed: 03/11/2023] Open
Abstract
BACKGROUND Emery-Dreifuss muscular dystrophy (EDMD2) is a rare form of muscular dystrophy that is inherited as an autosomal dominant trait. In some patients, it is inherited from parental mosaicism, and this increases the recurrence risk significantly. The presence of mosaicism is underestimated due to the limitations of genetic testing and the difficulty in obtaining samples. METHODS A peripheral blood sample from a 9-year-old girl with EDMD2 was analyzed by enhanced whole exome sequencing (WES). Sanger sequencing in her unaffected parents and younger sister was performed for validation. In the mother, ultra-deep sequencing and droplet digital PCR (ddPCR) in multiple samples (blood, urine, saliva, oral epithelium, and nail clippings) were performed in order to identify the suspected mosaicism of the variant. RESULTS WES revealed a heterozygous mutation (LMNA, c.1622G>A) in the proband. Sanger sequencing of the mother suggested the presence of mosaicism. The ratio of mosaic mutation was confirmed in different samples by ultra-deep sequencing and ddPCR (19.98%-28.61% and 17.94%-28.33%, respectively). This inferred that the mosaic mutation may have occurred early during embryonic development and that the mother had gonosomal mosaicism. CONCLUSION We described a case of EDMD2 caused by maternal gonosomal mosaicism which was confirmed by using ultra-deep sequencing and ddPCR. This study illustrates the importance of a systematic and comprehensive screening of parental mosaicism with more sensitive approaches and the use of multiple tissue samples.
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Affiliation(s)
- Yanshu Xie
- Department of Pediatrics, The First Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Jingsi Luo
- Genetic and Metabolic Central Laboratory, Guangxi Birth Defects Research and Prevention Institute, Maternal and Child Health Hospital of Guangxi Zhuang Autonomous Region, Nanning, China.,Guangxi Key Laboratory of Precision Medicine for Genetic Diseases, Maternal and Child Health Hospital of Guangxi Zhuang Autonomous Region, Nanning, China
| | - Jingzi Zhong
- Department of Pediatrics, The First Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Xu Liu
- Department of Pediatrics, The First Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Jing Tang
- Department of Pediatrics, The First Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Dan Lan
- Department of Pediatrics, The First Affiliated Hospital of Guangxi Medical University, Nanning, China
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Leite AI, Ramos SDS, In Cio R, Vilhena IR, Carvalhas J. Several challenges associated with the anesthetic management of Emery-Dreifuss muscular dystrophy patients: case report. Braz J Anesthesiol 2023; 73:217-219. [PMID: 34624368 PMCID: PMC10068533 DOI: 10.1016/j.bjane.2021.07.037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Revised: 06/20/2021] [Accepted: 07/03/2021] [Indexed: 11/15/2022]
Abstract
Emery-Dreifuss Muscular Dystrophy is a very rare type of muscular dystrophy, associated with contractures, atrophy, and muscle weakness, besides cardiomyopathy with severe arrhythmias. Published studies focusing on this disorder are scarce. We describe the anesthetic management of a male patient with Emery-Dreifuss Muscular Dystrophy, to be submitted to umbilical and inguinal hernioplasty and hydrocele repair under epidural anesthesia. The anesthesia approach enabled us to circumvent the patient...s susceptibility to malignant hyperthermia and his potentially difficult airway, in addition to maintaining hemodynamic stability. The day after surgery the patient resumed walking, and two days later he was discharged from the hospital.
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Affiliation(s)
- Ana Isabel Leite
- Centro Hospitalar E Universit..rio de Coimbra, E.P.E, Coimbra, Portugal.
| | | | - Raquel In Cio
- Centro Hospitalar E Universit..rio de Coimbra, E.P.E, Coimbra, Portugal
| | | | - Joana Carvalhas
- Centro Hospitalar E Universit..rio de Coimbra, E.P.E, Coimbra, Portugal
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Kashyap N, Nikhanj A, Gagnon LR, Moukaskas B, Siddiqi ZA, Oudit GY. Cardiac manifestations and clinical management of X-linked Emery-Dreifuss muscular dystrophy: a case series. Eur Heart J Case Rep 2023; 7:ytad013. [PMID: 36727127 PMCID: PMC9879840 DOI: 10.1093/ehjcr/ytad013] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2022] [Revised: 12/30/2022] [Accepted: 01/09/2023] [Indexed: 01/13/2023]
Abstract
Background Heart disease is an under-recognized cause of morbidity and mortality in patients with Emery-Dreifuss muscular dystrophy (EDMD). Arrhythmias and conduction delays are highly prevalent and given the rarity of this disease the patient care process remains poorly defined. Case summary This study closely followed four adult patients from the Neuromuscular Multidisciplinary Clinic (Alberta, Canada) that presented with X-linked recessive EDMD. Patients were assessed and managed on a case-by-case basis. Clinical status and cardiac function were assessed through clinical history, physical examination, and investigations (12-lead electrocardiogram, 24 hour Holter monitor, transthoracic echocardiogram, and plasma biomarkers). Conduction disease, requiring permanent pacemaker, was prevalent in all patients. With appropriate medical therapy over a median follow-up period five years the cardiac status was shown to have stabilized in all these patients. Discussion We demonstrate the presentation of arrhythmias, conduction abnormalities, and chamber dilation in adult patients with X-linked EDMD. Cardiac medications and pacemaker therapy are shown to prevent adverse outcomes from these complications. Patients with EDMD are expected to develop heart disease early and prior to the development of an overt neuromuscular phenotype. These patients should be closely monitored in a multidisciplinary setting for effective management to improve their clinical outcomes.
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Affiliation(s)
- Niharika Kashyap
- Division of Cardiology, Department of Medicine, University of Alberta, 8440 112 Street NW, Edmonton, Alberta T6G 2R7, Canada,Mazankowski Alberta Heart Institute, University of Alberta, 11220 83 Avenue NW, Edmonton, Alberta T6G 2J2, Canada
| | - Anish Nikhanj
- Division of Cardiology, Department of Medicine, University of Alberta, 8440 112 Street NW, Edmonton, Alberta T6G 2R7, Canada,Mazankowski Alberta Heart Institute, University of Alberta, 11220 83 Avenue NW, Edmonton, Alberta T6G 2J2, Canada
| | - Luke R Gagnon
- Division of Cardiology, Department of Medicine, University of Alberta, 8440 112 Street NW, Edmonton, Alberta T6G 2R7, Canada,Mazankowski Alberta Heart Institute, University of Alberta, 11220 83 Avenue NW, Edmonton, Alberta T6G 2J2, Canada
| | - Basel Moukaskas
- Division of Cardiology, Department of Medicine, University of Alberta, 8440 112 Street NW, Edmonton, Alberta T6G 2R7, Canada,Mazankowski Alberta Heart Institute, University of Alberta, 11220 83 Avenue NW, Edmonton, Alberta T6G 2J2, Canada
| | - Zaeem A Siddiqi
- Division of Neurology, Department of Medicine, University of Alberta, 8440 112 Street NW, Edmonton, Alberta T6G 2R7, Canada
| | - Gavin Y Oudit
- Corresponding author. Tel: +780 407 8569, Fax: +780 407 6452,
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Iskandar K, Sunartini, Astari FN, Gumilang RA, Ilma N, Shartyanie NP, Adistyawan G, Tan G, Gunadi, Lai PS. Autosomal dominant Emery-Dreifuss muscular dystrophy caused by a mutation in the lamin A/C gene identified by exome sequencing: a case report. BMC Pediatr 2022; 22:601. [PMID: 36253810 DOI: 10.1186/s12887-022-03662-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/02/2021] [Accepted: 10/10/2022] [Indexed: 11/16/2022] Open
Abstract
Background Emery-Dreifuss Muscular Dystrophy (EDMD) is an uncommon genetic disease among the group of muscular dystrophies. EDMD is clinically heterogeneous and resembles other muscular dystrophies. Mutation of the lamin A/C (LMNA) gene, which causes EDMD, also causes many other diseases. There is inter and intrafamilial variability in clinical presentations. Precise diagnosis can help in patient surveillance, especially before they present with cardiac problems. Hence, this paper shows how a molecular work-out by next-generation sequencing can help this group of disorders. Case presentation A 2-year-10-month-old Javanese boy presented to our clinic with weakness in lower limbs and difficulty climbing stairs. The clinical features of the boy were Gower's sign, waddling gait and high CK level. His father presented with elbow contractures and heels, toe walking and weakness of limbs, pelvic, and peroneus muscles. Exome sequencing on this patient detected a pathogenic variant in the LMNA gene (NM_170707: c.C1357T: NP_733821: p.Arg453Trp) that has been reported to cause Autosomal Dominant Emery-Dreifuss muscular dystrophy. Further examination showed total atrioventricular block and atrial fibrillation in the father. Conclusion EDMD is a rare disabling muscular disease that poses a diagnostic challenge. Family history work-up and thorough neuromuscular physical examinations are needed. Early diagnosis is essential to recognize orthopaedic and cardiac complications, improving the clinical management and prognosis of the disease. Exome sequencing could successfully determine pathogenic variants to provide a conclusive diagnosis.
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Tang Z, Hu Z, Qin X, Zhu Z, Liu Z. Surgical Treatment for Severe Cervical Hyperlordosis and Thoracolumar Kyphoscoliosis with Emery-Dreifuss Muscular Dystrophy: A Case Report and Literature Review. Orthop Surg 2022; 14:3448-3454. [PMID: 36250567 PMCID: PMC9732636 DOI: 10.1111/os.13526] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/19/2022] [Revised: 08/31/2022] [Accepted: 09/01/2022] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND Emery-Dreifuss muscular dystrophy (EDMD) is an uncommon, gradually progressive X-linked myopathy, and it could result in rigid spinal deformity. Only a few case reports have described surgical treatment of cervical hyperlordosis and thoracolumbar kyphoscoliosis secondary to EDMD. We report a rare case of EDMD to present the surgical strategies of severe cervical hyperlordosis and thoracolumbar kyphoscoliosis. CASE PRESENTATION The patient was a 22-year-old man with EDMD who had severe cervical hyperlordosis and thoracolumbar kyphoscoliosis. A posterior spinal fusion from T9-S2 was performed to correct the thoracolumbar kyphoscoliosis at the age of 21 years. Six months later, with an anterior C7-T1 closing wedge bone-disc-bone osteotomy and a posterior-anterior-posterior cervicothoracic fusion from C4-T4, the cervical deformity was corrected, thus achieving a horizontal gaze. During 1.5-year follow-up, no loss of correction was observed. CONCLUSION Cervical posterior-anterior-posterior closing-wedge osteotomy combined with long fusion at thoracolumbar spine can be a reliable surgical technique to correct severe spine deformity in EDMD. This two-stage revision surgical strategy can help restore a horizontal gaze on the basis of a balanced trunk. Cervical deformity in such patients should be corrected in the first stage considering its role as a "driver" of the global spine deformity.
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Affiliation(s)
- Ziyang Tang
- Division of Spine Surgery, Department of Orthopedic Surgery, Nanjing Drum Tower HospitalThe Clinical College of Nanjing Medical UniversityNanjingChina
| | - Zongshan Hu
- Division of Spine Surgery, Department of Orthopedic Surgery, Nanjing Drum Tower HospitalThe Affiliated Hospital of Nanjing University Medical SchoolNanjingChina
| | - Xiaodong Qin
- Division of Spine Surgery, Department of Orthopedic Surgery, Nanjing Drum Tower HospitalThe Affiliated Hospital of Nanjing University Medical SchoolNanjingChina
| | - Zezhang Zhu
- Division of Spine Surgery, Department of Orthopedic Surgery, Nanjing Drum Tower HospitalThe Clinical College of Nanjing Medical UniversityNanjingChina,Division of Spine Surgery, Department of Orthopedic Surgery, Nanjing Drum Tower HospitalThe Affiliated Hospital of Nanjing University Medical SchoolNanjingChina
| | - Zhen Liu
- Division of Spine Surgery, Department of Orthopedic Surgery, Nanjing Drum Tower HospitalThe Clinical College of Nanjing Medical UniversityNanjingChina,Division of Spine Surgery, Department of Orthopedic Surgery, Nanjing Drum Tower HospitalThe Affiliated Hospital of Nanjing University Medical SchoolNanjingChina
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Takamizawa K, Kim KS, Ueda H. Emery-Dreifuss muscular dystrophy with dilated cardiomyopathy preceding skeletal muscle symptoms. Cardiol Young 2022; 32:1175-7. [PMID: 34819192 DOI: 10.1017/S1047951121004674] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Emery-Dreifuss muscular dystrophy is a slowly progressive skeletal muscle and joint disorder associated with cardiac complications. Dilated cardiomyopathy was the initial manifestation of Emery-Dreifuss muscular dystrophy in an 8-year-old girl. Despite normal muscle and myocardial biopsies, genetic testing revealed LMNA mutations. As Emery-Dreifuss muscular dystrophy is associated with minimal skeletal muscle weakness, cardiac complications can facilitate its diagnosis.
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Yamazawa H, Takeda A, Izumi G, Komaki H, Nishino I. Sudden cardiac death prevention in an Emery-Dreifuss muscular dystrophy patient. Pediatr Int 2022; 64:e15204. [PMID: 35522606 DOI: 10.1111/ped.15204] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/09/2021] [Revised: 02/26/2022] [Accepted: 03/25/2022] [Indexed: 01/05/2023]
Affiliation(s)
- Hirokuni Yamazawa
- Department of Pediatrics, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Hokkaido, Japan
| | - Atsuhito Takeda
- Department of Pediatrics, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Hokkaido, Japan
| | - Gaku Izumi
- Department of Pediatrics, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Hokkaido, Japan
| | - Hirofumi Komaki
- Translational Medical Center, National Center of Neurology and Psychiatry, Tokyo, Japan
| | - Ichizo Nishino
- Department of Neuromuscular Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo, Japan
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Nicolas HA, Hua K, Quigley H, Ivare J, Tesson F, Akimenko MA. A CRISPR/Cas9 zebrafish lamin A/C mutant model of muscular laminopathy. Dev Dyn 2021; 251:645-661. [PMID: 34599606 DOI: 10.1002/dvdy.427] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2021] [Revised: 08/13/2021] [Accepted: 09/16/2021] [Indexed: 11/06/2022] Open
Abstract
BACKGROUND Lamin A/C gene (LMNA) mutations frequently cause cardiac and/or skeletal muscle diseases called striated muscle laminopathies. We created a zebrafish muscular laminopathy model using CRISPR/Cas9 technology to target the zebrafish lmna gene. RESULTS Heterozygous and homozygous lmna mutants present skeletal muscle damage at 1 day post-fertilization (dpf), and mobility impairment at 4 to 7 dpf. Cardiac structure and function analyses between 1 and 7 dpf show mild and transient defects in the lmna mutants compared to wild type (WT). Quantitative RT-PCR analysis of genes implicated in striated muscle laminopathies show a decrease in jun and nfκb2 expression in 7 dpf homozygous lmna mutants compared to WT. Homozygous lmna mutants have a 1.26-fold protein increase in activated Erk 1/2, kinases associated with striated muscle laminopathies, compared to WT at 7 dpf. Activated Protein Kinase C alpha (Pkc α), a kinase that interacts with lamin A/C and Erk 1/2, is also upregulated in 7 dpf homozygous lmna mutants compared to WT. CONCLUSIONS This study presents an animal model of skeletal muscle laminopathy where heterozygous and homozygous lmna mutants exhibit prominent skeletal muscle abnormalities during the first week of development. Furthermore, this is the first animal model that potentially implicates Pkc α in muscular laminopathies.
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Affiliation(s)
- Hannah A Nicolas
- Department of Biology, Faculty of Science, University of Ottawa, Ottawa, Ontario, Canada
| | - Khang Hua
- Department of Biology, Faculty of Science, University of Ottawa, Ottawa, Ontario, Canada
| | - Hailey Quigley
- Department of Biology, Faculty of Science, University of Ottawa, Ottawa, Ontario, Canada
| | - Joshua Ivare
- Department of Biology, Faculty of Science, University of Ottawa, Ottawa, Ontario, Canada
| | - Frédérique Tesson
- Interdisciplinary School of Health Sciences, University of Ottawa, Ottawa, Ontario, Canada
| | - Marie-Andrée Akimenko
- Department of Biology, Faculty of Science, University of Ottawa, Ottawa, Ontario, Canada
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Kovalchuk T, Yakovleva E, Fetisova S, Vershinina T, Lebedeva V, Lyubimtseva T, Lebedev D, Mitrofanova L, Ryzhkov A, Sokolnikova P, Fomicheva Y, Kozyreva A, Zhuk S, Smolina N, Zlotina A, Pervunina T, Kostareva A, Vasichkina E. Case Reports: Emery-Dreifuss Muscular Dystrophy Presenting as a Heart Rhythm Disorders in Children. Front Cardiovasc Med 2021; 8:668231. [PMID: 34026875 PMCID: PMC8137911 DOI: 10.3389/fcvm.2021.668231] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2021] [Accepted: 04/07/2021] [Indexed: 01/06/2023] Open
Abstract
Emery-Dreifuss muscular dystrophy (EDMD) is inherited muscle dystrophy often accompanied by cardiac abnormalities in the form of supraventricular arrhythmias, conduction defects and sinus node dysfunction. Cardiac phenotype typically arises years after skeletal muscle presentation, though, could be severe and life-threatening. The defined clinical manifestation with joint contractures, progressive muscle weakness and atrophy, as well as cardiac symptoms are observed by the third decade of life. Still, clinical course and sequence of muscle and cardiac signs may be variable and depends on the genotype. Cardiac abnormalities in patients with EDMD in pediatric age are not commonly seen. Here we describe five patients with different forms of EDMD (X-linked and autosomal-dominant) caused by the mutations in EMD and LMNA genes, presented with early onset of cardiac abnormalities and no prominent skeletal muscle phenotype. The predominant forms of cardiac pathology were atrial arrhythmias and conduction disturbances that progress over time. The presented cases discussed in the light of therapeutic strategy, including radiofrequency ablation and antiarrhythmic devices implantation, and the importance of thorough neurological and genetic screening in pediatric patients presenting with complex heart rhythm disorders.
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Affiliation(s)
- Tatiana Kovalchuk
- World-Class Research Centre for Personalized Medicine, Almazov National Medical Research Centre, Saint Petersburg, Russia
| | - Elena Yakovleva
- World-Class Research Centre for Personalized Medicine, Almazov National Medical Research Centre, Saint Petersburg, Russia
| | - Svetlana Fetisova
- World-Class Research Centre for Personalized Medicine, Almazov National Medical Research Centre, Saint Petersburg, Russia
| | - Tatiana Vershinina
- World-Class Research Centre for Personalized Medicine, Almazov National Medical Research Centre, Saint Petersburg, Russia
| | - Viktoriya Lebedeva
- Institute of Heart and Vessels, Almazov National Medical Research Centre, Saint Petersburg, Russia
| | - Tamara Lyubimtseva
- Institute of Heart and Vessels, Almazov National Medical Research Centre, Saint Petersburg, Russia
| | - Dmitriy Lebedev
- Institute of Heart and Vessels, Almazov National Medical Research Centre, Saint Petersburg, Russia
| | - Lubov Mitrofanova
- Pathology Unit, Almazov National Medical Research Centre, Saint Petersburg, Russia
| | - Anton Ryzhkov
- Radiology Unit, Almazov National Medical Research Centre, Saint Petersburg, Russia
| | - Polina Sokolnikova
- Institute of Molecular biology and Genetics, Almazov National Medical Research Centre, Saint Petersburg, Russia
| | - Yuliya Fomicheva
- Institute of Molecular biology and Genetics, Almazov National Medical Research Centre, Saint Petersburg, Russia
| | - Alexandra Kozyreva
- Institute of Molecular biology and Genetics, Almazov National Medical Research Centre, Saint Petersburg, Russia
| | - Sergey Zhuk
- Institute of Molecular biology and Genetics, Almazov National Medical Research Centre, Saint Petersburg, Russia
| | - Natalia Smolina
- Institute of Molecular biology and Genetics, Almazov National Medical Research Centre, Saint Petersburg, Russia
| | - Anna Zlotina
- Institute of Molecular biology and Genetics, Almazov National Medical Research Centre, Saint Petersburg, Russia
| | - Tatiana Pervunina
- Institute of Perinatology and Pediatrics, Almazov National Medical Research Centre, Saint Petersburg, Russia
| | - Anna Kostareva
- Institute of Molecular biology and Genetics, Almazov National Medical Research Centre, Saint Petersburg, Russia.,Department of Women's and Children's Health and Center for Molecular Medicine, Karolinska Institutet, Solna, Sweden
| | - Elena Vasichkina
- World-Class Research Centre for Personalized Medicine, Almazov National Medical Research Centre, Saint Petersburg, Russia
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Tao J, Duan J, Pi X, Wang H, Li S. A splicing LMNA mutation causing laminopathies accompanied by aortic valve malformation. J Clin Lab Anal 2021; 35:e23736. [PMID: 33626194 DOI: 10.1002/jcla.23736] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2020] [Revised: 01/25/2021] [Accepted: 01/26/2021] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Laminopathies caused by LMNA gene mutations are characterized by different clinical manifestations. Among them, cardiac involvement is one of the most severe phenotypes. CASE PRESENTATION A 30-year-old man visited the hospital because of palpitations, shortness of breath, and fatigue. He also had muscular dystrophy, joint contractures, scoliosis, and mild dysphagia. A novel de novo heterozygous LMNA splice variant (c.810+1G>T) with dilated cardiomyopathy, Emery-Dreifuss muscular dystrophy, and progressive cardiac conduction defect was identified by genetic analysis. The patient also presented with congenital aortic valve malformation, which has never been reported in laminopathies. CONCLUSIONS The LMNA mutation (c.810+1G>T) was identified for the first time, enriching the mutation spectrum of the LMNA gene. The correlation between an LMNA mutation and congenital aortic valve malformation deserves further study.
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Affiliation(s)
- Jingwen Tao
- Division of Cardiology, Department of Internal Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.,Hubei Key Laboratory of Genetics and Molecular Mechanism of Cardiological Disorders, Huazhong University of Science and Technology, Wuhan, China
| | - Jialin Duan
- Division of Cardiology, Department of Internal Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.,Hubei Key Laboratory of Genetics and Molecular Mechanism of Cardiological Disorders, Huazhong University of Science and Technology, Wuhan, China
| | - Xiu Pi
- Division of Cardiology, Department of Internal Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.,Hubei Key Laboratory of Genetics and Molecular Mechanism of Cardiological Disorders, Huazhong University of Science and Technology, Wuhan, China
| | - Hong Wang
- Division of Cardiology, Department of Internal Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.,Hubei Key Laboratory of Genetics and Molecular Mechanism of Cardiological Disorders, Huazhong University of Science and Technology, Wuhan, China
| | - Sheng Li
- Division of Cardiology, Department of Internal Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.,Hubei Key Laboratory of Genetics and Molecular Mechanism of Cardiological Disorders, Huazhong University of Science and Technology, Wuhan, China
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13
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Giucă A, Mitu C, Popescu BO, Bastian AE, Capşa R, Mursă A, Rădoi V, Popescu BA, Jurcuţ R. Novel FHL1 mutation variant identified in a patient with nonobstructive hypertrophic cardiomyopathy and myopathy - a case report. BMC Med Genet 2020; 21:188. [PMID: 32993534 PMCID: PMC7525989 DOI: 10.1186/s12881-020-01131-w] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/17/2020] [Accepted: 09/22/2020] [Indexed: 12/23/2022]
Abstract
Background Hypertrophic cardiomyopathy (HCM) is a genetic disorder mostly caused by sarcomeric gene mutations, but almost 10% of cases are attributed to inherited metabolic and neuromuscular disorders. First described in 2008 in an American-Italian family with scapuloperoneal myopathy, FHL1 gene encodes four-and-a-half LIM domains 1 proteins which are involved in sarcomere formation, assembly and biomechanical stress sensing both in cardiac and skeletal muscle, and its mutations are responsible for a large spectrum of neuromuscular disorders (mostly myopathies) and cardiac disease, represented by HCM, either isolated, or in conjunction with neurologic and skeletal muscle impairment. We thereby report a novel mutation variant in FHL1 structure, associated with HCM and type 6 Emery-Dreifuss muscular dystrophy (EDMD). Case presentation We describe the case of a 40 year old male patient, who was referred to our department for evaluation in the setting of NYHA II heart failure symptoms and was found to have HCM. The elevated muscular enzymes raised the suspicion of a neuromuscular disease. Rigid low spine and wasting of deltoidus, supraspinatus, infraspinatus and calf muscles were described by the neurological examination. Electromyography and muscle biopsy found evidence of chronic myopathy. Diagnosis work-up was completed by next-generation sequencing genetic testing which found a likely pathogenic mutation in the FHL1 gene (c.157-1G > A, hemizygous) involved in the development of X-linked EDMD type 6. Conclusion This case report highlights the importance of multimodality diagnostic approach in a patient with a neuromuscular disorder and associated hypertrophic cardiomyopathy by identifying a novel mutation variant in FHL1 gene. Raising awareness of non-sarcomeric gene mutations which can lead to HCM is fundamental, because of diagnostic and clinical risk stratification challenges.
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Affiliation(s)
- Adrian Giucă
- Expert Center for Rare Cardiovascular Genetic Diseases, "Prof. Dr. C.C. Iliescu" Emergency Institute for Cardiovascular Diseases, Street no.258, postal code:022328, Bucharest, Romania
| | - Cristina Mitu
- Neurology Department, Colentina Clinical Hospital, Bucharest, Romania
| | - Bogdan Ovidiu Popescu
- Neurology Department, Colentina Clinical Hospital, Bucharest, Romania.,"Carol Davila" University of Medicine and Pharmacy, Euroecolab, Bucharest, Romania
| | | | - Răzvan Capşa
- "Carol Davila" University of Medicine and Pharmacy, Euroecolab, Bucharest, Romania.,Fundeni Clinical Institute, Bucharest, Romania
| | - Adriana Mursă
- Expert Center for Rare Cardiovascular Genetic Diseases, "Prof. Dr. C.C. Iliescu" Emergency Institute for Cardiovascular Diseases, Street no.258, postal code:022328, Bucharest, Romania
| | - Viorica Rădoi
- Expert Center for Rare Cardiovascular Genetic Diseases, "Prof. Dr. C.C. Iliescu" Emergency Institute for Cardiovascular Diseases, Street no.258, postal code:022328, Bucharest, Romania.,"Carol Davila" University of Medicine and Pharmacy, Euroecolab, Bucharest, Romania
| | - Bogdan Alexandru Popescu
- Expert Center for Rare Cardiovascular Genetic Diseases, "Prof. Dr. C.C. Iliescu" Emergency Institute for Cardiovascular Diseases, Street no.258, postal code:022328, Bucharest, Romania.,"Carol Davila" University of Medicine and Pharmacy, Euroecolab, Bucharest, Romania
| | - Ruxandra Jurcuţ
- Expert Center for Rare Cardiovascular Genetic Diseases, "Prof. Dr. C.C. Iliescu" Emergency Institute for Cardiovascular Diseases, Street no.258, postal code:022328, Bucharest, Romania. .,"Carol Davila" University of Medicine and Pharmacy, Euroecolab, Bucharest, Romania.
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14
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Gómez-Monsivais WL, Monterrubio-Ledezma F, Huerta-Cantillo J, Mondragon-Gonzalez R, Alamillo-Iniesta A, García-Aguirre I, Azuara-Medina PM, Arguello-García R, Rivera-Monroy JE, Holaska JM, Hernández-Méndez JME, Garrido E, Magaña JJ, Winder SJ, Brancaccio A, Martínez-Vieyra I, Navarro-Garcia F, Cisneros B. The Molecular Basis and Biologic Significance of the β-Dystroglycan-Emerin Interaction. Int J Mol Sci 2020; 21:E5944. [PMID: 32824881 DOI: 10.3390/ijms21175944] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2020] [Revised: 07/29/2020] [Accepted: 08/04/2020] [Indexed: 01/04/2023] Open
Abstract
β-dystroglycan (β-DG) assembles with lamins A/C and B1 and emerin at the nuclear envelope (NE) to maintain proper nuclear architecture and function. To provide insight into the nuclear function of β-DG, we characterized the interaction between β-DG and emerin at the molecular level. Emerin is a major NE protein that regulates multiple nuclear processes and whose deficiency results in Emery–Dreifuss muscular dystrophy (EDMD). Using truncated variants of β-DG and emerin, via a series of in vitro and in vivo binding experiments and a tailored computational analysis, we determined that the β-DG–emerin interaction is mediated at least in part by their respective transmembrane domains (TM). Using surface plasmon resonance assays we showed that emerin binds to β-DG with high affinity (KD in the nanomolar range). Remarkably, the analysis of cells in which DG was knocked out demonstrated that loss of β-DG resulted in a decreased emerin stability and impairment of emerin-mediated processes. β-DG and emerin are reciprocally required for their optimal targeting within the NE, as shown by immunofluorescence, western blotting and immunoprecipitation assays using emerin variants with mutations in the TM domain and B-lymphocytes of a patient with EDMD. In summary, we demonstrated that β-DG plays a role as an emerin interacting partner modulating its stability and function.
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15
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Fujii S, Eguchi K, Sato C, Saito Y, Indrawati LA, Shirai S, Nishino I, Yabe I. [A case of Emery-Dreifuss muscular dystrophy with slight joint contracture]. Rinsho Shinkeigaku 2020; 60:554-559. [PMID: 32641626 DOI: 10.5692/clinicalneurol.60.cn-001431] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
A 42-year-old man with a history of two previous coronary embolisms was referred to our hospital. He had been experiencing muscle weakness since he was around 40 years old. He had muscle atrophy of the scapula, upper arm, and lower extremities, and electromyography revealed myogenic changes in the limb muscles. Histopathological analysis of the muscle biopsy specimen revealed a complete deficiency of emerin protein, and genetic examination revealed a mutation in the emerin (EMD) gene, resulting in a diagnosis of Emery-Dreifuss muscular dystrophy (EDMD). EDMD is a muscular disorder with three symptoms: joint contracture at early onset, muscle weakness and atrophy, and cardiac dysfunction. Although this patient showed no obvious joint contracture, the course and clinical symptoms vary among patients. Therefore, in patients in whom clinical diagnosis is difficult, muscle biopsy and genetic testing should be performed for EDMD in order to prevent sudden death due to this disease.
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Affiliation(s)
- Shintaro Fujii
- Department of Neurology, Faculty of Medicine and Graduate School of Medicine, Hokkaido University
| | - Katsuki Eguchi
- Department of Neurology, Faculty of Medicine and Graduate School of Medicine, Hokkaido University
| | - Chika Sato
- Department of Neurology, Faculty of Medicine and Graduate School of Medicine, Hokkaido University
| | - Yoshihiko Saito
- Department of Neurology, National Center of Neurology and Psychiatry
| | - Luh Ari Indrawati
- Department of Neurology, National Center of Neurology and Psychiatry
| | - Shinichi Shirai
- Department of Neurology, Faculty of Medicine and Graduate School of Medicine, Hokkaido University
| | - Ichizo Nishino
- Department of Neurology, National Center of Neurology and Psychiatry
| | - Ichiro Yabe
- Department of Neurology, Faculty of Medicine and Graduate School of Medicine, Hokkaido University
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16
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Chiba Y, Fukushima A, Nakao M, Kobayashi Y, Ishigaki T, Tenma T, Kamiya K, Shingu Y, Ooka T, Matsui Y, Anzai T. Refractory Right Ventricular Failure in a Patient with Emery-Dreifuss Muscular Dystrophy. Intern Med 2020; 59:1277-1281. [PMID: 32074578 PMCID: PMC7303449 DOI: 10.2169/internalmedicine.4113-19] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
A 23-year-old man had progressive muscle weakness and Emery-Dreifuss muscular dystrophy (EDMD) due to a LMNA (lamin A/C) mutation. Congestive heart failure diagnosed at 19 years of age. Maximal drug treatment/cardiac resynchronization failed to improve the cardiac function. He was therefore hospitalized due to heart failure. Despite extracorporeal membrane oxygenation, he developed severe right heart dysfunction and died (multiple organ failure). A cardiac lesion's presence determines the prognosis of EDMD. While there are many arrhythmia reports, few reports on heart failure (particularly severe heart failure requiring cardiac transplantation) have been published. Right heart function monitoring and early ventricular-assist device use plus right heart support considering heart transplantation are important.
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Affiliation(s)
- Yasuyuki Chiba
- Department of Cardiovascular Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Japan
| | - Arata Fukushima
- Department of Cardiovascular Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Japan
- Asabu Heart and Gastrointestinal Clinic, Japan
| | - Motoki Nakao
- Department of Cardiovascular Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Japan
| | - Yuta Kobayashi
- Department of Cardiovascular Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Japan
| | - Takahiro Ishigaki
- Department of Cardiovascular and Thoracic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Japan
| | - Taro Tenma
- Department of Cardiovascular Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Japan
| | - Kiwamu Kamiya
- Department of Cardiovascular Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Japan
| | - Yasushige Shingu
- Department of Cardiovascular and Thoracic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Japan
| | - Tomonori Ooka
- Department of Cardiovascular and Thoracic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Japan
| | - Yoshiro Matsui
- Department of Cardiovascular and Thoracic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Japan
- Hanaoka Seishu Memorial Cardiovascular Clinic, Japan
| | - Toshihisa Anzai
- Department of Cardiovascular Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Japan
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17
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Bossone KA, Ellis JA, Holaska JM. Histone acetyltransferase inhibition rescues differentiation of emerin-deficient myogenic progenitors. Muscle Nerve 2020; 62:128-136. [PMID: 32304242 DOI: 10.1002/mus.26892] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2019] [Revised: 03/05/2020] [Accepted: 04/07/2020] [Indexed: 12/20/2022]
Abstract
INTRODUCTION Emery-Dreifuss muscular dystrophy (EDMD) is a disease characterized by skeletal muscle wasting, major tendon contractures, and cardiac conduction defects. Mutations in the gene encoding emerin cause EDMD1. Our previous studies suggested that emerin activation of histone deacetylase 3 (HDAC3) to reduce histone 4-lysine 5 (H4K5) acetylation (ac) is important for myogenic differentiation. METHODS Pharmacological inhibitors (Nu9056, L002) of histone acetyltransferases targeting acetylated H4K5 were used to test whether increased acetylated H4K5 was responsible for the impaired differentiation seen in emerin-deficient myogenic progenitors. RESULTS Nu9056 and L002 rescued impaired differentiation in emerin deficiency. SRT1720, which inhibits the nicotinamide adenine dinucleotide (NAD)+ -dependent deacetylase sirtuin 1 (SIRT1), failed to rescue myotube formation. DISCUSSION We conclude that emerin regulation of HDAC3 activity to affect H4K5 acetylation dynamics is important for myogenic differentiation. Targeting H4K5ac dynamics represents a potential new strategy for ameliorating the skeletal muscle wasting seen in EDMD1.
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Affiliation(s)
- Katherine A Bossone
- Department of Biomedical Sciences, Cooper Medical School of Rowan University, Camden, New Jersey, United States.,Department of Pharmaceutical Sciences, University of the Sciences, Philadelphia, Pennsylvania, United States
| | - Joseph A Ellis
- Department of Pharmaceutical Sciences, University of the Sciences, Philadelphia, Pennsylvania, United States
| | - James M Holaska
- Department of Biomedical Sciences, Cooper Medical School of Rowan University, Camden, New Jersey, United States.,Department of Pharmaceutical Sciences, University of the Sciences, Philadelphia, Pennsylvania, United States
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18
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Affiliation(s)
| | - Shravan Ambati
- AdventHealth Orlando Hospital, Orlando, Florida.,Orlando Heart and Vascular Center, Orlando, Florida
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19
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Perepelina K, Klauzen P, Khudiakov A, Zlotina A, Fomicheva Y, Rudenko D, Gordeev M, Sergushichev A, Malashicheva A, Kostareva A. Generation of two iPSC lines (FAMRCi006-A and FAMRCi006-B) from patient with dilated cardiomyopathy and Emery-Dreifuss muscular dystrophy associated with genetic variant LMNAp.Arg527Pro. Stem Cell Res 2020; 43:101714. [PMID: 32059175 DOI: 10.1016/j.scr.2020.101714] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/30/2019] [Revised: 12/24/2019] [Accepted: 01/20/2020] [Indexed: 11/16/2022] Open
Abstract
Mutations in LMNA gene are known to cause a broad range of diseases called laminopathies. We have generated two induced pluripotent stem cell lines FAMRCi006-A and FAMRCi006-B from a patient carrying LMNA p. p.Arg527Pro mutation associated with Emery-Dreifuss muscular dystrophy and dilated cardiomyopathy. Patient-specific peripheral blood mononuclear cells were reprogrammed to iPSCs using Sendai virus reprogramming system. Characterization of iPSCs had revealed pluripotency marker expression, normal karyotype, ability to differentiate into three embryonic germ layers. The reported iPSC lines could be a useful tool for in vitro modeling of laminopathies associated with LMNA genetic variants.
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Affiliation(s)
- Kseniya Perepelina
- Saint Petersburg State University, Saint-Petersburg, Russia; Almazov National Medical Research Centre, Saint-Petersburg, Russia.
| | - Polina Klauzen
- Saint Petersburg State University, Saint-Petersburg, Russia; Almazov National Medical Research Centre, Saint-Petersburg, Russia
| | | | - Anna Zlotina
- Saint Petersburg State University, Saint-Petersburg, Russia; Almazov National Medical Research Centre, Saint-Petersburg, Russia
| | - Yulia Fomicheva
- Almazov National Medical Research Centre, Saint-Petersburg, Russia
| | - Dmitry Rudenko
- Almazov National Medical Research Centre, Saint-Petersburg, Russia
| | - Mikhail Gordeev
- Almazov National Medical Research Centre, Saint-Petersburg, Russia
| | | | - Anna Malashicheva
- Saint Petersburg State University, Saint-Petersburg, Russia; Almazov National Medical Research Centre, Saint-Petersburg, Russia
| | - Anna Kostareva
- Saint Petersburg State University, Saint-Petersburg, Russia; Almazov National Medical Research Centre, Saint-Petersburg, Russia
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20
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Meinke P, Kerr ARW, Czapiewski R, de Las Heras JI, Dixon CR, Harris E, Kölbel H, Muntoni F, Schara U, Straub V, Schoser B, Wehnert M, Schirmer EC. A multistage sequencing strategy pinpoints novel candidate alleles for Emery-Dreifuss muscular dystrophy and supports gene misregulation as its pathomechanism. EBioMedicine 2019; 51:102587. [PMID: 31862442 PMCID: PMC7000448 DOI: 10.1016/j.ebiom.2019.11.048] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2019] [Revised: 11/18/2019] [Accepted: 11/26/2019] [Indexed: 12/27/2022] Open
Abstract
Background As genome-wide approaches prove difficult with genetically heterogeneous orphan diseases, we developed a new approach to identify candidate genes. We applied this to Emery-Dreifuss muscular dystrophy (EDMD), characterised by early onset contractures, slowly progressive muscular wasting, and life-threatening heart conduction disturbances with wide intra- and inter-familial clinical variability. Roughly half of EDMD patients are linked to six genes encoding nuclear envelope proteins, but the disease mechanism remains unclear because the affected proteins function in both cell mechanics and genome regulation. Methods A primer library was generated to test for mutations in 301 genes from four categories: (I) all known EDMD-linked genes; (II) genes mutated in related muscular dystrophies; (III) candidates generated by exome sequencing in five families; (IV) functional candidates — other muscle nuclear envelope proteins functioning in mechanical/genome processes affected in EDMD. This was used to sequence 56 unlinked patients with EDMD-like phenotype. Findings Twenty-one patients could be clearly assigned: 18 with mutations in genes of similar muscular dystrophies; 3 with previously missed mutations in EDMD-linked genes. The other categories yielded novel candidate genes, most encoding nuclear envelope proteins with functions in gene regulation. Interpretation Our multi-pronged approach identified new disease alleles and many new candidate EDMD genes. Their known functions strongly argue the EDMD pathomechanism is from altered gene regulation and mechanotransduction due to connectivity of candidates from the nuclear envelope to the plasma membrane. This approach highlights the value of testing for related diseases using primer libraries and may be applied for other genetically heterogeneous orphan diseases. Funding The Wellcome Trust, Muscular Dystrophy UK, Medical Research Council, European Community's Seventh Framework Programme “Integrated European –omics research project for diagnosis and therapy in rare neuromuscular and neurodegenerative diseases (NEUROMICS)”.
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Affiliation(s)
- Peter Meinke
- Wellcome Centre for Cell Biology, University of Edinburgh, Edinburgh, UK; Friedrich Baur Institute at the Department of Neurology, University Hospital, LMU Munich, Germany
| | - Alastair R W Kerr
- Wellcome Centre for Cell Biology, University of Edinburgh, Edinburgh, UK
| | - Rafal Czapiewski
- Wellcome Centre for Cell Biology, University of Edinburgh, Edinburgh, UK
| | | | - Charles R Dixon
- Wellcome Centre for Cell Biology, University of Edinburgh, Edinburgh, UK
| | - Elizabeth Harris
- John Walton Muscular Dystrophy Research Centre, Newcastle University and Newcastle Hospitals NHS Foundation Trust, Newcastle upon Tyne, UK
| | - Heike Kölbel
- Department of Pediatric Neurology, Developmental Neurology and Social Pediatrics, University of Essen, Germany
| | - Francesco Muntoni
- Dubowitz Neuromuscular Centre, University College London Great Ormond Street Institute of Child Health, London, UK; 1 NIHR Great Ormond Street Hospital Biomedical Research Centre, Great Ormond Street Institute of Child Health, University College London, & Great Ormond Street Hospital Trust, London, UK
| | - Ulrike Schara
- Department of Pediatric Neurology, Developmental Neurology and Social Pediatrics, University of Essen, Germany
| | - Volker Straub
- John Walton Muscular Dystrophy Research Centre, Newcastle University and Newcastle Hospitals NHS Foundation Trust, Newcastle upon Tyne, UK
| | - Benedikt Schoser
- Friedrich Baur Institute at the Department of Neurology, University Hospital, LMU Munich, Germany
| | - Manfred Wehnert
- Institute of Human Genetics, University of Greifswald (retired), Greifswald, Germany
| | - Eric C Schirmer
- Wellcome Centre for Cell Biology, University of Edinburgh, Edinburgh, UK.
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21
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Kong D, Zhan Y, Liu C, Hu Y, Zhou Y, Luo J, Gu L, Zhou X, Zhang Z. A Novel Mutation Of The EMD Gene In A Family With Cardiac Conduction Abnormalities And A High Incidence Of Sudden Cardiac Death. Pharmgenomics Pers Med 2019; 12:319-327. [PMID: 31802929 PMCID: PMC6827504 DOI: 10.2147/pgpm.s221444] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/01/2019] [Accepted: 09/27/2019] [Indexed: 12/21/2022]
Abstract
Background Emery-Dreifuss muscular dystrophy, caused by mutations in genes such as emerin (EMD) or lamin A/C (LMNA), is a disorder affecting the joints, muscles, and heart, with a wide spectrum of patient phenotypes including muscle wasting and cardiac conduction defects. Methods and results Here we report a multi-generation family from the Hunan Province of China. Affected family members displayed an uncommon clinical presentation of serious cardiac conduction abnormalities at an early age and a high incidence of sudden cardiac death along with mild skeletal muscular atrophy and joint contracture. Clinical analysis of affected members provided evidence of X-linked recessive inheritance. Consequently, using Sanger sequencing of X chromosome exomes, we identified a novel duplication mutation (c.405dup/p.Asp136X) in the EMD gene as the cause for the disease in this family. This variant is a novel mutation that has not been previously reported in Pubmed, Clinvar or other cases reported in the Human Gene Mutation Database. Conclusion Our finding expands the mutation spectrum of Emery-Dreifuss muscular dystrophy and provides a rationale for EMD mutation testing in cases of X-linked inherited cardiac conduction disease and sudden cardiac death, even in those lacking pathognomonic neuromuscular features.
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Affiliation(s)
- Demiao Kong
- Department of Cardiovascular Surgery, The Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, China.,Department of Thoracic Surgery, Guizhou Provincial People's Hospital, Guiyang, Guizhou 550002, China
| | - Yi Zhan
- Department of Dermatology, The Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, China
| | - Canzhao Liu
- Department of Medicine, University of California San Diego, La Jolla, CA 92093, USA
| | - Yerong Hu
- Department of Cardiovascular Surgery, The Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, China
| | - Yangzhao Zhou
- Department of Cardiovascular Surgery, The Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, China.,Department of Medicine, University of California San Diego, La Jolla, CA 92093, USA
| | - Jiawen Luo
- Department of Cardiovascular Surgery, The Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, China
| | - Lu Gu
- Department of Cardiovascular Surgery, The Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, China
| | - Xinmin Zhou
- Department of Cardiovascular Surgery, The Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, China
| | - Zhiwei Zhang
- Department of Cardiovascular Surgery, The Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, China.,Department of Medicine, University of California San Diego, La Jolla, CA 92093, USA
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Abstract
Emery-Dreifuss muscular dystrophy (EDMD), clinically characterized by scapulo-humero-peroneal muscle atrophy and weakness, multi-joint contractures with spine rigidity and cardiomyopathy with conduction defects, is associated with structural/functional defect of genes that encode the proteins of nuclear envelope, including lamin A and several lamin-interacting proteins. This paper presents clinical aspects of EDMD in context to causative genes, genotype-phenotype correlation and its emplacement within phenotypic spectrum of skeletal muscle diseases associated with envelopathies.
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Affiliation(s)
- Agnieszka Madej-Pilarczyk
- a Neuromuscular Unit, Mossakowski Medical Research Centre, Polish Academy of Sciences , Warsaw , Poland
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23
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PAPADOPOULOS CONSTANTINOS, ZOUVELOU VASILIKI, PAPADIMAS GEORGEKONSTANTINOS. Facio-scapulo-humeral muscular dystrophy with early joint contractures and rigid spine. Acta Myol 2019; 38:25-28. [PMID: 31309179 PMCID: PMC6598404] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Early joint contractures in childhood or adolescence irrespective of muscle weakness are usually found in Emery-Dreifuss muscular dystrophy and collagen-VI related diseases and only rarely in the early stages of other progressive muscular dystrophies. We report a patient presenting severe elbow contractures and a rigid-spine since his early childhood without any evident muscle weakness, who was diagnosed with facioscapulohumeral muscular dystrophy later in life. This case is interesting since there has been no report, to date, of patients with a phenotype resembling facioscapulohumeral muscular dystrophy also in association with early and prominent elbow contractures and spinal rigidity, since childhood, resembling Emery-Dreifuss muscular dystrophy. Our case further confirmed the phenotypic variability often observed in carriers of D4Z4 reduce allele, and highlights the complexity of a definitive diagnosis in these cases.
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Affiliation(s)
- CONSTANTINOS PAPADOPOULOS
- Address for correspondence: Constantinos Papadopoulos; 1st Department of Neurology, University of Athens, Medical School, Eginition Hospital, 72 Vas. Sophias Avenue, 11528, Athens, Greece. E-mail:
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Ziat E, Mamchaoui K, Beuvin M, Nelson I, Azibani F, Spuler S, Bonne G, Bertrand AT. FHL1B Interacts with Lamin A/C and Emerin at the Nuclear Lamina and is Misregulated in Emery-Dreifuss Muscular Dystrophy. J Neuromuscul Dis 2018; 3:497-510. [PMID: 27911330 DOI: 10.3233/jnd-160169] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
BACKGROUND Emery-Dreifuss muscular dystrophy (EDMD) is associated with mutations in EMD and LMNA genes, encoding for the nuclear envelope proteins emerin and lamin A/C, indicating that EDMD is a nuclear envelope disease. We recently reported mutations in FHL1 gene in X-linked EDMD. FHL1 encodes FHL1A, and the two minor isoforms FHL1B and FHL1C. So far, none have been described at the nuclear envelope. OBJECTIVE To gain insight into the pathophysiology of EDMD, we focused our attention on the poorly characterized FHL1B isoform. METHODS The amount and the localisation of FHL1B were evaluated in control and diseased human primary myoblasts using immunofluorescence and western blotting. RESULTS We found that in addition to a cytoplasmic localization, this isoform strongly accumulated at the nuclear envelope of primary human myoblasts, like but independently of lamin A/C and emerin. During myoblast differentiation, we observed a major reduction of FHL1B protein expression, especially in the nucleus. Interestingly, we found elevated FHL1B expression level in myoblasts from an FHL1-related EDMD patient where the FHL1 mutation only affects FHL1A, as well as in myoblasts from an LMNA-related EDMD patient. CONCLUSIONS Altogether, the specific localization of FHL1B and its modulation in disease-patient's myoblasts confirmed FHL1-related EDMD as a nuclear envelope disease.
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Affiliation(s)
- Esma Ziat
- Sorbonne Universités, UPMC Univ Paris 06, INSERM UMRS974, CNRS FRE3617, Center of Research in Myology, F-75013 Paris, France.,Muscle Research Unit, Experimental and Clinical Research Center, A Joint Cooperation between Max-Delbrück-Center for Molecular Medicine and Charite Medical Faculty, Berlin, Germany
| | - Kamel Mamchaoui
- Sorbonne Universités, UPMC Univ Paris 06, INSERM UMRS974, CNRS FRE3617, Center of Research in Myology, F-75013 Paris, France
| | - Maud Beuvin
- Sorbonne Universités, UPMC Univ Paris 06, INSERM UMRS974, CNRS FRE3617, Center of Research in Myology, F-75013 Paris, France
| | - Isabelle Nelson
- Sorbonne Universités, UPMC Univ Paris 06, INSERM UMRS974, CNRS FRE3617, Center of Research in Myology, F-75013 Paris, France
| | - Feriel Azibani
- Sorbonne Universités, UPMC Univ Paris 06, INSERM UMRS974, CNRS FRE3617, Center of Research in Myology, F-75013 Paris, France
| | - Simone Spuler
- Muscle Research Unit, Experimental and Clinical Research Center, A Joint Cooperation between Max-Delbrück-Center for Molecular Medicine and Charite Medical Faculty, Berlin, Germany
| | - Gisèle Bonne
- Sorbonne Universités, UPMC Univ Paris 06, INSERM UMRS974, CNRS FRE3617, Center of Research in Myology, F-75013 Paris, France
| | - Anne T Bertrand
- Sorbonne Universités, UPMC Univ Paris 06, INSERM UMRS974, CNRS FRE3617, Center of Research in Myology, F-75013 Paris, France
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Boriani G, Biagini E, Ziacchi M, Malavasi VL, Vitolo M, Talarico M, Mauro E, Gorlato G, Lattanzi G. Cardiolaminopathies from bench to bedside: challenges in clinical decision-making with focus on arrhythmia-related outcomes. Nucleus 2018; 9:442-459. [PMID: 30130999 PMCID: PMC6244733 DOI: 10.1080/19491034.2018.1506680] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2018] [Revised: 06/16/2018] [Accepted: 07/25/2018] [Indexed: 02/07/2023] Open
Abstract
Lamin A/C gene mutations can be associated with cardiac diseases, usually referred to as 'cardiolaminopathies' characterized by arrhythmic disorders and/or left ventricular or biventricular dysfunction up to an overt picture of heart failure. The phenotypic cardiac manifestations of laminopathies are frequently mixed in complex clinical patterns and specifically may include bradyarrhythmias (sinus node disease or atrioventricular blocks), atrial arrhythmias (atrial fibrillation, atrial flutter, atrial standstill), ventricular tachyarrhythmias and heart failure of variable degrees of severity. Family history, physical examination, laboratory findings (specifically serum creatine phosphokinase values) and ECG findings are often important 'red flags' in diagnosing a 'cardiolaminopathy'. Sudden arrhythmic death, thromboembolic events or stroke and severe heart failure requiring heart transplantation are the most dramatic complications of the evolution of cardiolaminopathies and appropriate risk stratification is clinically needed combined with clinical follow-up. Treatment with cardiac electrical implantable devices is indicated in case of bradyarrhythmias (implant of a device with pacemaker functions), risk of life-threatening ventricular tachyarrhythmias (implant of an ICD) or in case of heart failure with wide QRS interval (implant of a device for cardiac resynchronization). New technologies introduced in the last 5 years can help physicians to reduce device-related complications, thanks to the extension of device longevity and availability of leadless pacemakers or defibrillators, to be implanted in appropriately selected patients. An improved knowledge of the complex pathophysiological pathways involved in cardiolaminopathies and in the determinants of their progression to more severe forms will help to improve clinical management and to better target pharmacological and non-pharmacological treatments.
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Affiliation(s)
- Giuseppe Boriani
- Cardiology Division, Department of Biomedical, Metabolic and Neural Sciences, University of Modena and Reggio Emilia, Policlinico di Modena, Modena, Italy
| | - Elena Biagini
- Institute of Cardiology, Department of Experimental, Diagnostic and Specialty Medicine, University of Bologna, S.Orsola-Malpighi University Hospital, Bologna, Italy
| | - Matteo Ziacchi
- Institute of Cardiology, Department of Experimental, Diagnostic and Specialty Medicine, University of Bologna, S.Orsola-Malpighi University Hospital, Bologna, Italy
| | - Vincenzo Livio Malavasi
- Cardiology Division, Department of Biomedical, Metabolic and Neural Sciences, University of Modena and Reggio Emilia, Policlinico di Modena, Modena, Italy
| | - Marco Vitolo
- Cardiology Division, Department of Biomedical, Metabolic and Neural Sciences, University of Modena and Reggio Emilia, Policlinico di Modena, Modena, Italy
| | - Marisa Talarico
- Cardiology Division, Department of Biomedical, Metabolic and Neural Sciences, University of Modena and Reggio Emilia, Policlinico di Modena, Modena, Italy
| | - Erminio Mauro
- Cardiology Division, Department of Biomedical, Metabolic and Neural Sciences, University of Modena and Reggio Emilia, Policlinico di Modena, Modena, Italy
| | - Giulia Gorlato
- Cardiology Division, Department of Biomedical, Metabolic and Neural Sciences, University of Modena and Reggio Emilia, Policlinico di Modena, Modena, Italy
| | - Giovanna Lattanzi
- CNR Institute of Molecular Genetics, Unit of Bologna, Bologna, Italy
- Laboratory of Musculoskeletal Cell Biology, Rizzoli Orthopedic Institute, Bologna, Italy
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26
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SIVITSKAYA LARYSAN, DANILENKO NINAG, VAIKHANSKAYA TATIYANAG, KURUSHKA TATSIYANAV, DAVYDENKO OLEGG. Three new cases of dilated cardiomyopathy caused by mutations in LMNA gene. Acta Myol 2017; 36:207-212. [PMID: 29770364 PMCID: PMC5953234] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Three cases of delated cardiomyopathy (DCM) with conduction defects (OMIM 115200), limb girdle muscular dystrophy 1B (OMIM 159001) and autosomal dominant Emery-Dreifuss muscular dystrophy 2 (OMIM 181350), all associated with different LMNA mutations are presented. Three heterozygous missense mutations were identified in unrelated patients - p.W520R (c.1558T > C), p.T528R (с.1583С > G) and p.R190P (c.569G > C). We consider these variants as pathogenic, leading to isolated DCM with conduction defects or syndromic DCM forms with limb-girdle muscular dystrophy and Emery-Dreifuss muscular dystrophy. The mutations were not detected in the ethnically matched control group and publicly available population databases. Their de novo occurrence led to the development of the disease that was not previously detected in the extended families. Mutations at the same codons associated with laminopathies have been already reported. Differences in the clinical phenotype for p.R190P and p.T528R carrier patients are shown and compared to previous reports.
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Affiliation(s)
- LARYSA N. SIVITSKAYA
- Institute of Genetics and Cytology, National Academy of Sciences of Belarus, Minsk, Belarus
| | - NINA G. DANILENKO
- Institute of Genetics and Cytology, National Academy of Sciences of Belarus, Minsk, Belarus
| | | | | | - OLEG G. DAVYDENKO
- Institute of Genetics and Cytology, National Academy of Sciences of Belarus, Minsk, Belarus
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27
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Iyer A, Koch AJ, Holaska JM. Expression Profiling of Differentiating Emerin-Null Myogenic Progenitor Identifies Molecular Pathways Implicated in Their Impaired Differentiation. Cells 2017; 6:cells6040038. [PMID: 29065506 PMCID: PMC5755497 DOI: 10.3390/cells6040038] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2017] [Revised: 10/18/2017] [Accepted: 10/18/2017] [Indexed: 11/16/2022] Open
Abstract
Mutations in the gene encoding emerin cause Emery-Dreifuss muscular dystrophy (EDMD), a disorder causing progressive skeletal muscle wasting, irregular heart rhythms and contractures of major tendons. RNA sequencing was performed on differentiating wildtype and emerin-null myogenic progenitors to identify molecular pathways implicated in EDMD, 340 genes were uniquely differentially expressed during the transition from day 0 to day 1 in wildtype cells. 1605 genes were uniquely expressed in emerin-null cells; 1706 genes were shared among both wildtype and emerin-null cells. One thousand and forty-seven transcripts showed differential expression during the transition from day 1 to day 2. Four hundred and thirty-one transcripts showed altered expression in both wildtype and emerin-null cells. Two hundred and ninety-five transcripts were differentially expressed only in emerin-null cells and 321 transcripts were differentially expressed only in wildtype cells. DAVID, STRING and Ingenuity Pathway Analysis identified pathways implicated in impaired emerin-null differentiation, including cell signaling, cell cycle checkpoints, integrin signaling, YAP/TAZ signaling, stem cell differentiation, and multiple muscle development and myogenic differentiation pathways. Functional enrichment analysis showed biological functions associated with the growth of muscle tissue and myogenesis of skeletal muscle were inhibited. The large number of differentially expressed transcripts upon differentiation induction suggests emerin functions during transcriptional reprograming of progenitors to committed myoblasts.
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Affiliation(s)
- Ashvin Iyer
- Department of Pharmaceutical Sciences, University of the Sciences, Philadelphia, PA 19104, USA.
| | - Adam J Koch
- Committee on Genetics, Genomics and Systems Biology, University of Chicago, Chicago, IL 60637, USA.
| | - James M Holaska
- Department of Biomedical Sciences, Rm 534, Cooper Medical School of Rowan University, 401 South Broadway St., Camden, NJ 08028, USA.
- Department of Pharmaceutical Sciences, University of the Sciences, Philadelphia, PA 19104, USA.
- Committee on Genetics, Genomics and Systems Biology, University of Chicago, Chicago, IL 60637, USA.
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28
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Madej-Pilarczyk A, Marchel M, Ochman K, Cegielska J, Steckiewicz R. Low-symptomatic skeletal muscle disease in patients with a cardiac disease - Diagnostic approach in skeletal muscle laminopathies. Neurol Neurochir Pol 2017; 52:174-180. [PMID: 28987496 DOI: 10.1016/j.pjnns.2017.09.006] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2017] [Revised: 09/13/2017] [Accepted: 09/14/2017] [Indexed: 11/27/2022]
Abstract
Mild skeletal muscle symptoms might be accompanied with severe cardiac disease, sometimes indicating a serious inherited disorder. Very often it is a cardiologist who refers a patient with cardiomyopathy and/or cardiac arrhythmia and discrete muscle disease for neurological consultation, which helps to establish a proper diagnosis. Here we present three families in which a diagnosis of skeletal muscle laminopathy was made after careful examination of the members, who presented with cardiac arrhythmia and/or heart failure and a mild skeletal muscle disease, which together with positive family history allowed to direct the molecular diagnostics and then provide appropriate treatment and counseling.
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Affiliation(s)
- Agnieszka Madej-Pilarczyk
- Neuromuscular Unit, Mossakowski Medical Research Center, Polish Academy of Sciences, Warsaw, Poland.
| | - Michał Marchel
- 1st Department of Cardiology, Medical University of Warsaw, Banacha 1a, Warsaw, Poland
| | - Karolina Ochman
- Clinics and Medical Laboratories INVICTA, Genetics Clinic, Gdansk, Poland
| | - Joanna Cegielska
- Department of Neurology, Medical University of Warsaw, Bielanski Hospital, Warsaw, Poland
| | - Roman Steckiewicz
- 1st Department of Cardiology, Medical University of Warsaw, Banacha 1a, Warsaw, Poland
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29
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Chen Z, Ren Z, Mei W, Ma Q, Shi Y, Zhang Y, Li S, Xiang L, Zhang J. A novel SYNE1 gene mutation in a Chinese family of Emery-Dreifuss muscular dystrophy-like. BMC Med Genet 2017; 18:63. [PMID: 28583108 PMCID: PMC5460548 DOI: 10.1186/s12881-017-0424-5] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/27/2016] [Accepted: 05/21/2017] [Indexed: 11/10/2022]
Abstract
BACKGROUND In the present study, a novel mutation in exon 46 at codon 2304 (G2304R) of the SYNE1 gene is described in a Chinese family (proband, mother, and sister) with Emery-Dreifuss muscular dystrophy-like, which clinically manifests as muscle weakness, muscle atrophy, joint contracture, and without significant cardiac abnormalities. METHODS Clinical examination and neuroimaging of the captured target region and high-throughput sequencing were performed in a family of four generations. Muscle changes were evaluated using magnetic resonance imaging and muscle biopsies. RESULTS Target region capture sequencing yielded a novel missense mutation in codon 2304 (G2304R), which is a heterozygous A to G point mutation at position 6910 (c.6910A > G) in exon 46 of SYNE1 leading to a glycine-to-arginine substitution (p.Gly2304Arg). The results were also identified by Sanger sequencing in three family members but not in the other three unaffected family members and 100 control subjects. CONCLUSIONS This mutation is probably pathogenic and is the first of its kind reported in a familial Emery-Dreifuss muscular dystrophy-like.
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Affiliation(s)
- Zuzhi Chen
- Department of Neurology, People's Hospital of Zhengzhou University, No. 7 Weiwu Road, Zhengzhou, Henan, 450003, China
| | - Zhixia Ren
- Department of Neurology, People's Hospital of Zhengzhou University, No. 7 Weiwu Road, Zhengzhou, Henan, 450003, China
| | - Wenli Mei
- Department of Neurology, People's Hospital of Zhengzhou University, No. 7 Weiwu Road, Zhengzhou, Henan, 450003, China
| | - Qiankun Ma
- Department of Neurology, People's Hospital of Zhengzhou University, No. 7 Weiwu Road, Zhengzhou, Henan, 450003, China
| | - Yingying Shi
- Department of Neurology, People's Hospital of Zhengzhou University, No. 7 Weiwu Road, Zhengzhou, Henan, 450003, China
| | - Yuanxing Zhang
- Department of Neurology, People's Hospital of Zhengzhou University, No. 7 Weiwu Road, Zhengzhou, Henan, 450003, China
| | - Shujian Li
- Department of Neurology, People's Hospital of Zhengzhou University, No. 7 Weiwu Road, Zhengzhou, Henan, 450003, China
| | - Li Xiang
- Department of Neurology, People's Hospital of Zhengzhou University, No. 7 Weiwu Road, Zhengzhou, Henan, 450003, China
| | - Jiewen Zhang
- Department of Neurology, People's Hospital of Zhengzhou University, No. 7 Weiwu Road, Zhengzhou, Henan, 450003, China.
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30
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Collins CM, Ellis JA, Holaska JM. MAPK signaling pathways and HDAC3 activity are disrupted during differentiation of emerin-null myogenic progenitor cells. Dis Model Mech 2017; 10:385-397. [PMID: 28188262 PMCID: PMC5399572 DOI: 10.1242/dmm.028787] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2016] [Accepted: 02/01/2017] [Indexed: 01/28/2023] Open
Abstract
Mutations in the gene encoding emerin cause Emery–Dreifuss muscular dystrophy (EDMD). Emerin is an integral inner nuclear membrane protein and a component of the nuclear lamina. EDMD is characterized by skeletal muscle wasting, cardiac conduction defects and tendon contractures. The failure to regenerate skeletal muscle is predicted to contribute to the skeletal muscle pathology of EDMD. We hypothesize that muscle regeneration defects are caused by impaired muscle stem cell differentiation. Myogenic progenitors derived from emerin-null mice were used to confirm their impaired differentiation and analyze selected myogenic molecular pathways. Emerin-null progenitors were delayed in their cell cycle exit, had decreased myosin heavy chain (MyHC) expression and formed fewer myotubes. Emerin binds to and activates histone deacetylase 3 (HDAC3). Here, we show that theophylline, an HDAC3-specific activator, improved myotube formation in emerin-null cells. Addition of the HDAC3-specific inhibitor RGFP966 blocked myotube formation and MyHC expression in wild-type and emerin-null myogenic progenitors, but did not affect cell cycle exit. Downregulation of emerin was previously shown to affect the p38 MAPK and ERK/MAPK pathways in C2C12 myoblast differentiation. Using a pure population of myogenic progenitors completely lacking emerin expression, we show that these pathways are also disrupted. ERK inhibition improved MyHC expression in emerin-null cells, but failed to rescue myotube formation or cell cycle exit. Inhibition of p38 MAPK prevented differentiation in both wild-type and emerin-null progenitors. These results show that each of these molecular pathways specifically regulates a particular stage of myogenic differentiation in an emerin-dependent manner. Thus, pharmacological targeting of multiple pathways acting at specific differentiation stages may be a better therapeutic approach in the future to rescue muscle regeneration in vivo. Editors' choice: HDAC3, p38 MAPK and ERK signaling are altered during differentiation of myogenic progenitors lacking emerin; pharmacological activation or inhibition of these signaling proteins rescues specific stages of myogenic differentiation.
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Affiliation(s)
- Carol M Collins
- University of the Sciences, Department of Pharmaceutical Sciences, 600 S. 43rd St, Philadelphia, PA 19104, USA
| | - Joseph A Ellis
- University of the Sciences, Department of Pharmaceutical Sciences, 600 S. 43rd St, Philadelphia, PA 19104, USA
| | - James M Holaska
- University of the Sciences, Department of Pharmaceutical Sciences, 600 S. 43rd St, Philadelphia, PA 19104, USA
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31
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Wu W, Chordia MD, Hart BP, Kumarasinghe ES, Ji MK, Bhargava A, Lawlor MW, Shin JY, Sera F, Homma S, Muchir A, Khire UR, Worman HJ. Macrocyclic MEK1/2 inhibitor with efficacy in a mouse model of cardiomyopathy caused by lamin A/C gene mutation. Bioorg Med Chem 2017; 25:1004-1013. [PMID: 28011205 PMCID: PMC5291759 DOI: 10.1016/j.bmc.2016.12.014] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2016] [Revised: 12/06/2016] [Accepted: 12/08/2016] [Indexed: 12/19/2022]
Abstract
Signaling mediated by extracellular signal-regulated kinases 1 and 2 (ERK1/2) is involved in numerous cellular processes. Mitogen-activated protein kinase kinases (MEK1/2) catalyze the phosphorylation of ERK1/2, converting it into an active kinase that regulates the expression of numerous genes and cellular processes. Inhibitors of MEK1/2 have demonstrated preclinical and clinical efficacy in certain cancers and types of cardiomyopathy. We report the synthesis of a novel, allosteric, macrocyclic MEK1/2 inhibitor that potently inhibits ERK1/2 activity in cultured cells and tissues of mice after systemic administration. Mice with dilated cardiomyopathy caused by a lamin A/C gene mutation have abnormally increased cardiac ERK1/2 activity. In these mice, this novel MEK1/2 inhibitor is well tolerated, improves left ventricular systolic function, decreases left ventricular fibrosis, has beneficial effects on skeletal muscle structure and pathology and prolongs survival. The novel MEK1/2 inhibitor described herein may therefore find clinical utility in the treatment of this rare cardiomyopathy, other types of cardiomyopathy and cancers in humans.
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Affiliation(s)
- Wei Wu
- Department of Medicine, College of Physicians & Surgeons, Columbia University, 630 West 168th Street, New York, NY 10032, United States; Department of Pathology and Cell Biology, College of Physicians & Surgeons, Columbia University, 630 West 168th Street, New York, NY 10032, United States
| | - Mahendra D Chordia
- Cheminpharma LLC, 23 Business Park Drive, Branford, CT 06405, United States
| | - Barry P Hart
- AlloMek Therapeutics LLC, 400 Farmington Avenue, Farmington, CT 06032, United States
| | | | - Min K Ji
- Cheminpharma LLC, 23 Business Park Drive, Branford, CT 06405, United States
| | - Ajay Bhargava
- Shakti BioResearch LLC, 1 Bradley Road, Suite 401, Woodbridge, CT 06525, United States
| | - Michael W Lawlor
- Department of Pathology and Laboratory Medicine, Medical College of Wisconsin, 9200 West Wisconsin Avenue, Milwaukee, WI 53226, United States
| | - Ji-Yeon Shin
- Department of Medicine, College of Physicians & Surgeons, Columbia University, 630 West 168th Street, New York, NY 10032, United States; Department of Pathology and Cell Biology, College of Physicians & Surgeons, Columbia University, 630 West 168th Street, New York, NY 10032, United States
| | - Fusako Sera
- Department of Medicine, College of Physicians & Surgeons, Columbia University, 630 West 168th Street, New York, NY 10032, United States
| | - Shunichi Homma
- Department of Medicine, College of Physicians & Surgeons, Columbia University, 630 West 168th Street, New York, NY 10032, United States
| | - Antoine Muchir
- Department of Medicine, College of Physicians & Surgeons, Columbia University, 630 West 168th Street, New York, NY 10032, United States; Department of Pathology and Cell Biology, College of Physicians & Surgeons, Columbia University, 630 West 168th Street, New York, NY 10032, United States
| | - Uday R Khire
- Cheminpharma LLC, 23 Business Park Drive, Branford, CT 06405, United States; AlloMek Therapeutics LLC, 400 Farmington Avenue, Farmington, CT 06032, United States.
| | - Howard J Worman
- Department of Medicine, College of Physicians & Surgeons, Columbia University, 630 West 168th Street, New York, NY 10032, United States; Department of Pathology and Cell Biology, College of Physicians & Surgeons, Columbia University, 630 West 168th Street, New York, NY 10032, United States.
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32
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Ekabe CJ, Kehbila J, Sama CB, Kadia BM, Abanda MH, Monekosso GL. Occurrence of Emery-Dreifuss muscular dystrophy in a rural setting of Cameroon: a case report and review of the literature. BMC Res Notes 2017; 10:36. [PMID: 28069046 PMCID: PMC5223404 DOI: 10.1186/s13104-016-2363-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2016] [Accepted: 12/23/2016] [Indexed: 12/03/2022] Open
Abstract
Background Emery-Dreifuss muscular dystrophy is a rare genetic muscular disease, presenting mainly with contractures, weakness and cardiac conduction abnormalities. Its clinical and laboratory similarities to other muscular dystrophies, and rarity poses diagnostic challenges, requiring a high index of suspicion in resource limited settings. Case presentation An 8 year old sub-Saharan male presented with rigidity and deformity of both elbows and ankles, and weakness of the upper limbs and lower limbs for duration of 4 months. This progressed to inability to stand and walk. There was no mental impairment. Physical examination was remarkable for contractures of the elbows and ankles, and wasting of muscles of the limbs and trunk, with a scapulohumeroperoneal pattern, and tachycardia. After laboratory investigations, a diagnosis of Emery-Dreifuss muscular dystrophy was suspected. Physiotherapy was started, wheel chair was prescribed, and referral to a specialist center was done for appropriate management. Conclusions Emery-Dreifuss muscular dystrophy is a rare disabling muscular disease which poses a diagnostic challenge. High index of suspicion is paramount for its early diagnoses to prevent orthopedic and cardiac complications. Prompt diagnosis and management is essential to improve on the prognosis of this disease.
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Affiliation(s)
- Cyril Jabea Ekabe
- Grace Community Health and Development Association (GRACHADA), P.O Box 15, Kumba, Cameroon.,Galactic Corps Research Group (GCRG), Buea, South West Region, Cameroon
| | - Jules Kehbila
- Grace Community Health and Development Association (GRACHADA), P.O Box 15, Kumba, Cameroon.,District Hospital Wum, Wum, North West Region, Cameroon.,Galactic Corps Research Group (GCRG), Buea, South West Region, Cameroon
| | - Carlson-Babila Sama
- Galactic Corps Research Group (GCRG), Buea, South West Region, Cameroon. .,Bambalang Medicalised Health Centre, Bambalang, Northwest Region, Cameroon.
| | - Benjamin Momo Kadia
- Grace Community Health and Development Association (GRACHADA), P.O Box 15, Kumba, Cameroon.,Presbyterian General Hospital Acha-Tugi, Acha-Tugi, Northwest Region, Cameroon
| | - Martin Hongieh Abanda
- Grace Community Health and Development Association (GRACHADA), P.O Box 15, Kumba, Cameroon.,Non Communicable Diseases Unit, Clinical Research Education, Networking & Consultancy (CRENC), Douala, Cameroon
| | - Gottlieb Lobe Monekosso
- Department of Medicine, Faculty of Health Sciences, University of Buea and Global Health Dialogue Foundation, Buea, Cameroon
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Piekarowicz K, Machowska M, Dratkiewicz E, Lorek D, Madej-Pilarczyk A, Rzepecki R. The effect of the lamin A and its mutants on nuclear structure, cell proliferation, protein stability, and mobility in embryonic cells. Chromosoma 2017; 126:501-17. [PMID: 27534416 DOI: 10.1007/s00412-016-0610-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [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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Maggi L, Carboni N, Bernasconi P. Skeletal Muscle Laminopathies: A Review of Clinical and Molecular Features. Cells 2016; 5:E33. [PMID: 27529282 DOI: 10.3390/cells5030033] [Citation(s) in RCA: 60] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [What about the content of this article? (0)] [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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Holt I, Duong NT, Zhang Q, Lam le T, Sewry CA, Mamchaoui K, Shanahan CM, Morris GE. Specific localization of nesprin-1-α2, the short isoform of nesprin-1 with a KASH domain, in developing, fetal and regenerating muscle, using a new monoclonal antibody. BMC Cell Biol 2016; 17:26. [PMID: 27350129 DOI: 10.1186/s12860-016-0105-9] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2016] [Accepted: 06/20/2016] [Indexed: 01/25/2023] Open
Abstract
Background Nesprin-1-giant (1008kD) is a protein of the outer nuclear membrane that links nuclei to the actin cytoskeleton via amino-terminal calponin homology domains. The short nesprin-1 isoform, nesprin-1-α2, is present only in skeletal and cardiac muscle and several pathogenic mutations occur within it, but the functions of this short isoform without calponin homology domains are unclear. The aim of this study was to determine mRNA levels and protein localization of nesprin-1-α2 at different stages of muscle development in order to shed light on its functions. Results mRNA levels of all known nesprin-1 isoforms with a KASH domain were determined by quantitative PCR. The mRNA for the 111 kD muscle-specific short isoform, nesprin-1-α2, was not detected in pre-differentiation human myoblasts but was present at significant levels in multinucleate myotubes. We developed a monoclonal antibody against the unique amino-terminal sequence of nesprin-1-α2, enabling specific immunolocalization for the first time. Nesprin-1-α2 protein was undetectable in pre-differentiation myoblasts but appeared at the nuclear rim in post-mitotic, multinucleate myotubes and reached its highest levels in fetal muscle. In muscle from a Duchenne muscular dystrophy biopsy, nesprin-1-α2 protein was detected mainly in regenerating fibres expressing neonatal myosin. Nesprin-1-giant was present at all developmental stages, but was also highest in fetal and regenerating fibres. In fetal muscle, both isoforms were present in the cytoplasm, as well as at the nuclear rim. A pathogenic early stop codon (E7854X) in nesprin-1 caused reduced mRNA levels and loss of protein levels of both nesprin-1-giant and (unexpectedly) nesprin-1-α2, but did not affect myogenesis in vitro. Conclusions Nesprin-1-α2 mRNA and protein expression is switched on during myogenesis, alongside other known markers of muscle differentiation. The results show that nesprin-1-α2 is dynamically controlled and may be involved in some process occurring during early myofibre formation, such as re-positioning of nuclei.
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Massalska D, Zimowski JG, Bijok J, Kucińska-Chahwan A, Łusakowska A, Jakiel G, Roszkowski T. Prenatal diagnosis of congenital myopathies and muscular dystrophies. Clin Genet 2016; 90:199-210. [PMID: 27197572 DOI: 10.1111/cge.12801] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2016] [Revised: 05/05/2016] [Accepted: 05/08/2016] [Indexed: 12/14/2022]
Abstract
Congenital myopathies and muscular dystrophies constitute a genetically and phenotypically heterogeneous group of rare inherited diseases characterized by muscle weakness and atrophy, motor delay and respiratory insufficiency. To date, curative care is not available for these diseases, which may severely affect both life-span and quality of life. We discuss prenatal diagnosis and genetic counseling for families at risk, as well as diagnostic possibilities in sporadic cases.
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Affiliation(s)
- D Massalska
- Department of Obstetrics and Gynecology, Centre of Postgraduate Medical Education, Warsaw, Poland
| | - J G Zimowski
- Department of Genetics, Institute of Psychiatry and Neurology, Warsaw, Poland
| | - J Bijok
- Department of Obstetrics and Gynecology, Centre of Postgraduate Medical Education, Warsaw, Poland
| | - A Kucińska-Chahwan
- Department of Obstetrics and Gynecology, Centre of Postgraduate Medical Education, Warsaw, Poland
| | - A Łusakowska
- Department of Neurology, Medical University of Warsaw, Poland
| | - G Jakiel
- Department of Obstetrics and Gynecology, Centre of Postgraduate Medical Education, Warsaw, Poland
| | - T Roszkowski
- Department of Obstetrics and Gynecology, Centre of Postgraduate Medical Education, Warsaw, Poland
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Steckiewicz R, Stolarz P, Świętoń E, Madej-Pilarczyk A, Grabowski M, Marchel M, Pieniak M, Filipiak KJ, Hausmanowa-Petrusewicz I, Opolski G. Cardiac pacing in 21 patients with Emery-Dreifuss muscular dystrophy: a single-centre study with a 39-year follow-up. Kardiol Pol 2015; 74:576-83. [PMID: 26575312 DOI: 10.5603/kp.a2015.0218] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2015] [Revised: 09/14/2015] [Accepted: 09/22/2015] [Indexed: 11/25/2022]
Abstract
BACKGROUND Emery-Dreifuss muscular dystrophy (EDMD) is a genetic condition associated with cardiac arrhythmias. The patients typically develop early, asymptomatic bradyarrhythmia, which may lead to sudden death, preventable with a cardiac implantable electronic device (CIED). EDMD may be characterised by atrial electrical silence. Intra-operative electrophysiological evaluation of the myocardium helps ultimately determine the true nature of the disorder and select an appropriate CIED. AIM To analyse permanent electrotherapy procedures in EDMD patients: atrial pacing limitations that stem from the electrophysiological properties of the myocardium and long-term follow-up of implanted devices. METHODS A total of 21 EDMD patients (mean age 29 ± 9 years) with a CIED implanted (1976-2014) due to bradyarrhythmia were included in the study. The implantation procedures and factors determining the CIED type selection were analysed. RESULTS CIEDs were implanted in five women and in 16 men with EDMD types 1 and 2 (mean follow-up: 11 ± 8 years). Intra-operatively assessed atrial electrophysiology resulted in changing the planned CIED type during the procedure in three men with EDMD type 1. Eventually, we implanted: eight DDD, one VDD, 11 VVI, and one CD-DR device, with four of the patients' devices switched later from DDD to VVI mode in response to electrophysiological changes in the atria. CONCLUSIONS Intra-operative assessment of atrial electrophysiological properties resulted in changing the planned DDD mode for VVI in 19% of patients with EDMD type 1. Progression of the underlying disease over a 39-year follow-up resulted in a later change of the initially selected pacing mode from DDD to VVI in 40% of cases.
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Nelson I, Stojkovic T, Allamand V, Leturcq F, Bécane HM, Babuty D, Toutain A, Béroud C, Richard P, Romero NB, Eymard B, Ben Yaou R, Bonne G. Laminin α2 Deficiency-Related Muscular Dystrophy Mimicking Emery-Dreifuss and Collagen VI related Diseases. J Neuromuscul Dis 2015; 2:229-240. [PMID: 27858741 PMCID: PMC5240538 DOI: 10.3233/jnd-150093] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Background: Laminin α2 deficient congenital muscular dystrophy, caused by mutations in the LAMA2 gene, is characterized by early muscle weakness associated with abnormal white matter signal on cerebral MRI. Objective: To report on 4 patients with LAMA2 gene mutations whose original clinical features complicated the diagnosis strategy. Methods: Clinical, electrophysiological, muscle imaging and histopathological data were retrospectively collected from all patients. DNA samples were analysed by next-generation sequencing or direct gene sequencing. Laminin α2 was analysed by western-blot and immunohistochemistry. Results: The four patients achieved independent walking. All had proximal muscle weakness with scapular winging and prominent joint contractures without peripheral neuropathy. During follow-up, two patients suffered from refractory epilepsy associated with brain leukoencephalopathy in one, polymicrogyria and lissencephaly without white matter changes in the other. In two patients, the distribution of fatty infiltration resembles that of collagen-VI related myopathies. Dilated cardiomyopathy contstartabstractwith conduction defects, suggestive of Emery-Dreifuss myopathy, emerged in two of them within the 4th decade. Molecular diagnosis remained elusive for many years. Finally, targeted capture-DNA sequencing unveiled the involvement of the LAMA2 gene in two families, and led us to further identify LAMA2 mutations in the remaining family using Sanger sequencing. Conclusions: This report extends the clinical and radiological features of partial Laminin α2 deficiency since patients showed atypical manifestations including dilated cardiomyopathy with conduction defects in 2, epilepsy in 2, one of whom also had sole cortical brain abnormalities. Importantly, clinical findings and muscle imaging initially pointed to collagen-VI related disorders and Emery-Dreifuss muscular dystrophy.
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Affiliation(s)
- Isabelle Nelson
- Sorbonne Universités,UPMCUniv Paris 06, INSERM UMRS974, CNRS FRE3617, Center of Research in Myology, F-75013 Paris, France.,Institut de Myologie, F-75013, Paris, France
| | - Tanya Stojkovic
- Sorbonne Universités,UPMCUniv Paris 06, INSERM UMRS974, CNRS FRE3617, Center of Research in Myology, F-75013 Paris, France.,Institut de Myologie, F-75013, Paris, France
| | - Valérie Allamand
- Sorbonne Universités,UPMCUniv Paris 06, INSERM UMRS974, CNRS FRE3617, Center of Research in Myology, F-75013 Paris, France.,Institut de Myologie, F-75013, Paris, France
| | - France Leturcq
- Sorbonne Universités,UPMCUniv Paris 06, INSERM UMRS974, CNRS FRE3617, Center of Research in Myology, F-75013 Paris, France.,AP-HP, Groupe Hospitalier Cochin-Broca-Hôtel Dieu, Laboratoire de biochimie et génétique moléculaire, Paris, France
| | - Henri-Marc Bécane
- Institut de Myologie, F-75013, Paris, France.,AP-HP, Groupe Hospitalier La Pitié-Salpêtrière, Centre de référence des maladies neuromusculaires Paris Est, F-75013, Paris, France
| | - Dominique Babuty
- Service de Cardiologie, Hôpital Trousseau, CHU Tours, Tours, France
| | - Annick Toutain
- Service de Génétique, Hôpital Bretonneau, CHU Tours, Tours, France
| | - Christophe Béroud
- INSERM UMR S910, AP-HM, service de génétique médicale, Aix Marseille Université, Marseille, France
| | - Pascale Richard
- AP-HP, Groupe Hospitalier La Pitié-Salpôtrière, U.F. Cardiogénétique et Myogénétique, Service de Biochimie Métabolique, F-75013, Paris, France
| | - Norma B Romero
- Sorbonne Universités,UPMCUniv Paris 06, INSERM UMRS974, CNRS FRE3617, Center of Research in Myology, F-75013 Paris, France.,Institut de Myologie, F-75013, Paris, France.,AP-HP, Groupe Hospitalier La Pitié-Salpêtrière, Centre de référence des maladies neuromusculaires Paris Est, F-75013, Paris, France.,Unité de morphologieneuromusculaire, Institut de Myologie, Groupe Hospitalier Universitaire La Pitié-Salpêtrière, F-75013, Paris, France
| | - Bruno Eymard
- Institut de Myologie, F-75013, Paris, France.,AP-HP, Groupe Hospitalier La Pitié-Salpêtrière, Centre de référence des maladies neuromusculaires Paris Est, F-75013, Paris, France
| | - Rabah Ben Yaou
- Sorbonne Universités,UPMCUniv Paris 06, INSERM UMRS974, CNRS FRE3617, Center of Research in Myology, F-75013 Paris, France.,Institut de Myologie, F-75013, Paris, France.,AP-HP, Groupe Hospitalier La Pitié-Salpêtrière, Centre de référence des maladies neuromusculaires Paris Est, F-75013, Paris, France
| | - Gisèle Bonne
- Sorbonne Universités,UPMCUniv Paris 06, INSERM UMRS974, CNRS FRE3617, Center of Research in Myology, F-75013 Paris, France.,Institut de Myologie, F-75013, Paris, France
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Camozzi D, Capanni C, Cenni V, Mattioli E, Columbaro M, Squarzoni S, Lattanzi G. Diverse lamin-dependent mechanisms interact to control chromatin dynamics. Focus on laminopathies. Nucleus 2015; 5:427-40. [PMID: 25482195 PMCID: PMC4164485 DOI: 10.4161/nucl.36289] [Citation(s) in RCA: 86] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
Interconnected functional strategies govern chromatin dynamics in eukaryotic cells. In this context, A and B type lamins, the nuclear intermediate filaments, act on diverse platforms involved in tissue homeostasis. On the nuclear side, lamins elicit large scale or fine chromatin conformational changes, affect DNA damage response factors and transcription factor shuttling. On the cytoplasmic side, bridging-molecules, the LINC complex, associate with lamins to coordinate chromatin dynamics with cytoskeleton and extra-cellular signals.
Consistent with such a fine tuning, lamin mutations and/or defects in their expression or post-translational processing, as well as mutations in lamin partner genes, cause a heterogeneous group of diseases known as laminopathies. They include muscular dystrophies, cardiomyopathy, lipodystrophies, neuropathies, and progeroid syndromes. The study of chromatin dynamics under pathological conditions, which is summarized in this review, is shedding light on the complex and fascinating role of the nuclear lamina in chromatin regulation.
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Affiliation(s)
- Daria Camozzi
- a CNR Institute for Molecular Genetics; Unit of Bologna and SC Laboratory of Musculoskeletal Cell Biology; Rizzoli Orthopedic Institute; Bologna, Italy
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40
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Antoku S, Zhu R, Kutscheidt S, Fackler OT, Gundersen GG. Reinforcing the LINC complex connection to actin filaments: the role of FHOD1 in TAN line formation and nuclear movement. Cell Cycle 2015; 14:2200-5. [PMID: 26083340 DOI: 10.1080/15384101.2015.1053665] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
Abstract
Positioning the nucleus is critical for many cellular processes including cell division, migration and differentiation. The linker of nucleoskeleton and cytoskeleton (LINC) complex spans the inner and outer nuclear membranes and has emerged as a major factor in connecting the nucleus to the cytoskeleton for movement and positioning. Recently, we discovered that the diaphanous formin family member FHOD1 interacts with the LINC complex component nesprin-2 giant (nesprin-2G) and that this interaction plays essential roles in the formation of transmembrane actin-dependent nuclear (TAN) lines and nuclear movement during cell polarization in fibroblasts. We found that FHOD1 strengthens the connection between nesprin-2G and rearward moving dorsal actin cables by providing a second site of interaction between nesprin-2G and the actin cable. These results indicate that the LINC complex connection to the actin cytoskeleton can be enhanced by cytoplasmic factors and suggest a new model for TAN line formation. We discuss how the nesprin-2G-FHOD1 interaction may be regulated and its possible functional significance for development and disease.
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Key Words
- ABS, actin binding site
- ANC-1, Syne homology
- CH, calponin homology
- DAD, diaphanous autoregulatory domain
- DID, diaphanous inhibitory domain
- DRF, diaphanous related formin
- EDMD, Emery-Dreifuss muscular dystrophy
- Emery-Dreifuss muscular dystrophy
- FH, formin homology
- FHOD1
- GBD, GTPase binding domain
- GFP-mN2G, GFP-mini-nesprin-2G
- KASH, Klarsicht
- LINC Complex
- LINC, linker of nucleoskeleton and cytoskeleton
- LPA, lysophosphatidic acid
- SR, spectrin repeat
- TAN lines
- TAN lines, transmembrane actin-dependent nuclear lines
- actin filaments
- formin
- nesprin
- nesprin-2G, nesprin-2 giant
- nuclear movement
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Affiliation(s)
- Susumu Antoku
- a Department of Pathology & Cell Biology ; Columbia University ; New York , NY USA
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Abstract
INTRODUCTION Mutations in the inner nuclear envelope protein emerin cause Emery-Dreifuss muscular dystrophy (EDMD), which is characterized by progressive skeletal muscle wasting, cardiac conduction defects, and tendon contractures. We previously showed that emerin binds directly to the transcription regulator Lmo7 and attenuates its activity to regulate the proper temporal expression of important myogenic differentiation genes. METHODS The skeletal muscle and cardiac phenotypes were analyzed in a newly generated Lmo7-null mouse using histological analysis, echocardiography, and various neuromuscular tests to determine if Lmo7 was important for skeletal muscle and cardiac function. RESULTS Lmo7-null mice had growth retardation, decreased fiber size, and impaired skeletal muscle and cardiac function. Lmo7-null mice also had lower levels of phosphorylated retinoblastoma (Rb), extracellular signal-regulated kinase, and c-Jun N-terminal kinase, which is consistent with altered Rb and mitogen-activated protein kinase signaling. CONCLUSIONS These findings demonstrate that loss of Lmo7 in mice causes myopathic phenotypes similar to those seen in other EDMD mouse models.
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Affiliation(s)
- Aaron Mull
- Department of Medicine, Section of Cardiology, The University of Chicago, Chicago, Illinois, USA
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42
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Berk JM, Simon DN, Jenkins-Houk CR, Westerbeck JW, Grønning-Wang LM, Carlson CR, Wilson KL. The molecular basis of emerin-emerin and emerin-BAF interactions. J Cell Sci 2014; 127:3956-69. [PMID: 25052089 DOI: 10.1242/jcs.148247] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
Abstract
Emerin is a conserved membrane component of nuclear lamina structure. Here, we report an advance in understanding the molecular basis of emerin function: intermolecular emerin-emerin association. There were two modes: one mediated by association of residues 170-220 in one emerin molecule to residues 170-220 in another, and the second involving residues 170-220 and 1-132. Deletion analysis showed residues 187-220 contain a positive element essential for intermolecular association in cells. By contrast, deletion of residues 168-186 inactivated a proposed negative element, required to limit or control association. Association of GFP-emerin with nuclear BAF in cells required the LEM domain (residues 1-47) and the positive element. Emerin peptide arrays revealed direct binding of residues 170-220 to residues 206-225 (the proposed positive element), residues 147-174 (particularly P(153)MYGRDSAYQSITHYRP(169)) and the LEM domain. Emerin residues 1-132 and 159-220 were each sufficient to bind lamin A or B1 tails in vitro, identifying two independent regions of molecular contact with lamins. These results, and predicted emerin intrinsic disorder, support the hypothesis that there are multiple 'backbone' and LEM-domain configurations in a proposed intermolecular emerin network at the nuclear envelope.
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Affiliation(s)
- Jason M Berk
- Department of Cell Biology, Johns Hopkins University School of Medicine, 725 N. Wolfe Street, Baltimore, MD 21205 USA
| | - Dan N Simon
- Department of Cell Biology, Johns Hopkins University School of Medicine, 725 N. Wolfe Street, Baltimore, MD 21205 USA
| | - Clifton R Jenkins-Houk
- Department of Cell Biology, Johns Hopkins University School of Medicine, 725 N. Wolfe Street, Baltimore, MD 21205 USA
| | - Jason W Westerbeck
- Department of Cell Biology, Johns Hopkins University School of Medicine, 725 N. Wolfe Street, Baltimore, MD 21205 USA
| | - Line M Grønning-Wang
- Department of Nutrition, Institute of Basic Medical Sciences, University of Oslo, 0317 Oslo, Norway
| | - Cathrine R Carlson
- Institute for Experimental Medical Research, Oslo University Hospital and University of Oslo, 0424 Oslo, Norway KG Jebsen Cardiac Research Center and Center for Heart Failure Research, University of Oslo, 0450 Oslo, Norway
| | - Katherine L Wilson
- Department of Cell Biology, Johns Hopkins University School of Medicine, 725 N. Wolfe Street, Baltimore, MD 21205 USA
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Abstract
Emery-Dreifuss muscular dystrophy (EDMD) is caused by mutations in the genes encoding emerin, lamins A and C and FHL1. Additional EDMD-like syndromes are caused by mutations in nesprins and LUMA. This review will specifically focus on emerin function and the current thinking for how loss or mutations in emerin cause EDMD. Emerin is a well-conserved, ubiquitously expressed protein of the inner nuclear membrane. Emerin has been shown to have diverse functions, including the regulation of gene expression, cell signaling, nuclear structure and chromatin architecture. This review will focus on the relationships between these functions and the EDMD disease phenotype. Additionally it will highlight open questions concerning emerin's roles in cell and nuclear biology and disease.
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Affiliation(s)
- Adam J Koch
- Committee on Genetics, Genomics and Systems Biology, The University of Chicago, Chicago, IL 60637, USA.
| | - James M Holaska
- Committee on Genetics, Genomics and Systems Biology, The University of Chicago, Chicago, IL 60637, USA; Committee on Developmental, Regeneration and Stem Cell Biology, The University of Chicago, Chicago, IL 60637, USA.
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Wozniak MA, Baker BM, Chen CS, Wilson KL. The emerin-binding transcription factor Lmo7 is regulated by association with p130Cas at focal adhesions. PeerJ 2013; 1:e134. [PMID: 24010014 PMCID: PMC3757464 DOI: 10.7717/peerj.134] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2013] [Accepted: 07/29/2013] [Indexed: 12/23/2022] Open
Abstract
Loss of function mutations in the nuclear inner membrane protein, emerin, cause X-linked Emery-Dreifuss muscular dystrophy (X-EDMD). X-EDMD is characterized by contractures of major tendons, skeletal muscle weakening and wasting, and cardiac conduction system defects. The transcription factor Lmo7 regulates muscle- and heart-relevant genes and is inhibited by binding to emerin, suggesting Lmo7 misregulation contributes to EDMD disease. Lmo7 associates with cell adhesions and shuttles between the plasma membrane and nucleus, but the regulation and biological consequences of this dual localization were unknown. We report endogenous Lmo7 also associates with focal adhesions in cells, and both co-localizes and co-immunoprecipitates with p130Cas, a key signaling component of focal adhesions. Lmo7 nuclear localization and transcriptional activity increased significantly in p130Cas-null MEFs, suggesting Lmo7 is negatively regulated by p130Cas-dependent association with focal adhesions. These results support EDMD models in which Lmo7 is a downstream mediator of integrin-dependent signaling that allows tendon cells and muscles to adapt to and withstand mechanical stress.
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Affiliation(s)
- Michele A Wozniak
- Department of Cell Biology, Johns Hopkins University School of Medicine , Baltimore, MD , USA ; Department of Bioengineering, University of Pennsylvania , Philadelphia, PA , USA
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45
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Abstract
Emerin, a conserved LEM-domain protein, is among the few nuclear membrane proteins for which extensive basic knowledge—biochemistry, partners, functions, localizations, posttranslational regulation, roles in development and links to human disease—is available. This review summarizes emerin and its emerging roles in nuclear “lamina” structure, chromatin tethering, gene regulation, mitosis, nuclear assembly, development, signaling and mechano-transduction. We also highlight many open questions, exploration of which will be critical to understand how this intriguing nuclear membrane protein and its “family” influence the genome.
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Affiliation(s)
- Jason M Berk
- Department of Cell Biology; Johns Hopkins University School of Medicine; Baltimore, MD USA
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46
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Politano L, Carboni N, Madej-Pilarczyk A, Marchel M, Nigro G, Fidziaóska A, Opolski G, Hausmanowa-Petrusewicz I. Advances in basic and clinical research in laminopathies. Acta Myol 2013; 32:18-22. [PMID: 23853505 PMCID: PMC3665372] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Lamins (LMNA) are the main proteins of the nuclear lamina considered to be the ancestors of all intermediate filament proteins. They form complex protein assemblies with integral proteins of the inner nuclear membrane, transcriptional regulators, histones and chromatin modifiers. During recent years, interest in lamins has greatly increased due to the identification of many distinct heritable human disorders associated with lamin mutations. These disorders, collectively termed laminopathies, range from muscular dystrophies to premature aging. They may affect muscle, fat, bone, nerve and skin tissues. The workshop was addressed to understand lamin organization and its roles in nuclear processes, mutations in lamins affecting cell and tissues functions, the biology of the nucleus and laminopathic disease mechanisms, all aspects important for designing future therapies.
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Affiliation(s)
- Luisa Politano
- Cardiomyology and Medical Genetics, Department of Experimental Medicine, Second University of Naples, Italy;,Address for correspondence: Luisa Politano, Cardiomiologia e Genetica Medica, I Policlinico, piazza Miraglia, 80138 Napoli, Italy. E-mail:
| | - Nicola Carboni
- Dipartimento di Sanità Pubblica, Medicina Clinica e Molecolare, Cagliari University, Italy
| | | | - Michael Marchel
- Department of Cardiology, Medical University of Warsaw, Warsaw, Poland
| | - Gerardo Nigro
- Arrhythmologic Unit, Department of Cardiothoracic Sciences, Second University of Naples, Italy
| | - Anna Fidziaóska
- Neurorepair Department, Mossakowski Medical Research Centre, Warsaw, Poland
| | - Grzegorz Opolski
- Department of Cardiology, Medical University of Warsaw, Warsaw, Poland
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Simon DN, Zastrow MS, Wilson KL. Direct actin binding to A- and B-type lamin tails and actin filament bundling by the lamin A tail. Nucleus 2010; 1:264-72. [PMID: 21327074 PMCID: PMC3027033 DOI: 10.4161/nucl.1.3.11799] [Citation(s) in RCA: 76] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2009] [Revised: 03/08/2010] [Accepted: 03/11/2010] [Indexed: 04/13/2023] Open
Abstract
Nuclear intermediate filament networks formed by A- and B-type lamins are major components of the nucleoskeleton. Lamins have growing links to human physiology and disease including Emery-Dreifuss muscular dystrophy (EDMD), lipodystrophy, cardiomyopathy, neuropathy, cerebellar disorders and segmental accelerated 'aging' syndromes. How lamins interact with other nucleoskeletal components, and even the identities of these other components, are open questions. Previous studies suggested lamins might bind actin. We report that the recombinant C-terminal tail domain of human A- and B-type lamins binds directly to purified actin in high-speed pelleting assays. This interaction maps to a conserved Actin Binding site (AB-1) comprising lamin A residues 461-536 in the Ig-fold domain, which are 54% identical in lamin B1. Two EDMD-causing missense mutations (R527P and L530P) in lamin A that are predicted to disrupt the Ig-fold, each reduced F-actin binding by ∼66%, whereas the surface-exposed lipodystrophy-causing R482Q mutation had no significant effect. The lamin A tail was unique among lamins in having a second actin-binding site (AB-2). This second site was mapped to lamin A tail residues 564-608, based on actin-binding results for the lamin C tail and internal deletions in the lamin A tail that cause Hutchinson-Gilford Progeria Syndrome (Δ35, Δ50) or restrictive dermopathy (Δ90). Supporting the presence of two actin-binding sites, recombinant precursor (unmodified) and mature lamin A tails (not C or B1 tails) each bundled F-actin in vitro: furthermore F-actin bundling was reduced 25-40% by the R527P, L530P, Δ35 and Δ50 mutations, and was abolished by Δ90. Unexpectedly, the mature lamin A tail bound F-actin significantly more efficiently than did the prelamin A tail; this suggested unmodified residues 647-664, unique to prelamin A, might auto-inhibit binding to actin (and potentially other partners). These biochemical results suggest direct mechanisms by which lamins, particularly lamin A, might impact the concentration of free actin in the nucleus or pathways including transcription, nuclear export, chromatin remodeling, chromatin movement and nuclear assembly that require nuclear myosin 1c and polymerizable actin.
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Affiliation(s)
- Dan N Simon
- Department of Cell Biology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
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