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Saat H, Sahin I. Mutation spectrum of hereditary myopathies in Turkish patients and novel variants. Ann Hum Genet 2021; 85:178-185. [PMID: 33963534 DOI: 10.1111/ahg.12429] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2021] [Revised: 04/23/2021] [Accepted: 04/26/2021] [Indexed: 11/28/2022]
Abstract
Hereditary myopathies are a heterogeneous disorder known to be associated with more than 100 genes. Although hereditary myopathy subgroups can be partially described with traditional methods such as muscle biopsy, next-generation sequencing (NGS) is essential to reveal the disease's underlying genetic etiology and molecular mechanisms. In this study, we performed clinical exome sequencing or whole-exome sequencing (CES/WES) in 20 unrelated Turkish patients. Thirteen pathogenic or likely pathogenic variants, including five novel variantswere detected in the 16 known hereditary myopathy genes. We achieved a high rate of diagnosis (65%) compared to previous studies. The most common condition noticed was limb-girdle muscular dystrophy (LGMD), which should not be ignored in patients diagnosed with myopathy. CES or WES provides a certain molecular diagnosis from a broad perspective to demonstrate underlying genetic causes in heterogeneous disorders. Therefore, exome sequencing offers a higher and more complete diagnosis than the gene panel.
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Affiliation(s)
- Hanife Saat
- Department of Medical Genetics, University of Health Sciences, Dışkapı Yıldırım Beyazıt Research and Training Hospital, Ankara, Turkey
| | - Ibrahim Sahin
- Department of Medical Genetics, University of Health Sciences, Dışkapı Yıldırım Beyazıt Research and Training Hospital, Ankara, Turkey
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2
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Barghouthi T, Lemley R, Figurelle M, Bushnell C. Epidemiology of neurologic disease in pregnancy. HANDBOOK OF CLINICAL NEUROLOGY 2020; 171:119-141. [PMID: 32736746 DOI: 10.1016/b978-0-444-64239-4.00006-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Many neurologic diseases in women are influenced by the physiologic and hormonal changes of pregnancy, and pregnancy itself poses challenges in both treatment and evaluation of these conditions. Some diseases, such as epilepsy and multiple sclerosis, have a high enough prevalence in the young female population to support robust epidemiologic data while many other neurologic diseases, such as specific myopathies and muscular dystrophies, have a low prevalence, with data limited to case reports and small case series. This chapter features epidemiologic information regarding a breadth of neurologic conditions, including stroke, epilepsy, demyelinating disease, peripheral neuropathies, migraine, sleep-disordered breathing, and meningioma, in women in the preconception, pregnancy, and postpartum stages.
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Affiliation(s)
- Tamara Barghouthi
- Department of Neurology, Wake Forest Baptist Medical Center, Winston-Salem, NC, United States
| | - Regan Lemley
- Department of Neurology, Wake Forest Baptist Medical Center, Winston-Salem, NC, United States
| | - Morgan Figurelle
- Department of Neurology, Wake Forest Baptist Medical Center, Winston-Salem, NC, United States
| | - Cheryl Bushnell
- Department of Neurology, Wake Forest Baptist Medical Center, Winston-Salem, NC, United States.
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Özyilmaz B, Kirbiyik Ö, Özdemir TR, Kaya Özer Ö, Kutbay YB, Erdogan KM, Güvenç MS, Kale MY, Gazeteci H, Kiliç B, Sertpoyraz F, Diniz G, Baydan F, Gençpinar P, Dündar NO, Yiş U. Impact of next‐generation sequencing panels in the evaluation of limb‐girdle muscular dystrophies. Ann Hum Genet 2019; 83:331-347. [DOI: 10.1111/ahg.12319] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2019] [Revised: 04/04/2019] [Accepted: 04/09/2019] [Indexed: 12/23/2022]
Affiliation(s)
- Berk Özyilmaz
- Genetic Diagnosis Center, Tepecik Training and Research Hospital University of Health Sciences Izmir Turkey
- Neuromuscular Disorders Unit, Tepecik Training and Research Hospital University of Health Sciences Izmir Turkey
| | - Özgür Kirbiyik
- Genetic Diagnosis Center, Tepecik Training and Research Hospital University of Health Sciences Izmir Turkey
| | - Taha R. Özdemir
- Genetic Diagnosis Center, Tepecik Training and Research Hospital University of Health Sciences Izmir Turkey
| | - Özge Kaya Özer
- Genetic Diagnosis Center, Tepecik Training and Research Hospital University of Health Sciences Izmir Turkey
| | - Yaşar B. Kutbay
- Genetic Diagnosis Center, Tepecik Training and Research Hospital University of Health Sciences Izmir Turkey
| | - Kadri M. Erdogan
- Genetic Diagnosis Center, Tepecik Training and Research Hospital University of Health Sciences Izmir Turkey
| | - Merve Saka Güvenç
- Genetic Diagnosis Center, Tepecik Training and Research Hospital University of Health Sciences Izmir Turkey
| | - Murat Yildirim Kale
- Neuromuscular Disorders Unit, Tepecik Training and Research Hospital University of Health Sciences Izmir Turkey
| | - Hande Gazeteci
- Pediatric Neurology Cigli District Training Hospital Izmir Turkey
| | - Betül Kiliç
- Pediatric Neurology Derince Education Research Hospital Kocaeli Turkey
| | - Filiz Sertpoyraz
- Neuromuscular Disorders Unit, Tepecik Training and Research Hospital University of Health Sciences Izmir Turkey
| | - Gulden Diniz
- Department of Pathology Izmir Democracy University Izmir Turkey
| | - Figen Baydan
- Neuromuscular Disorders Unit, Tepecik Training and Research Hospital University of Health Sciences Izmir Turkey
| | - Pinar Gençpinar
- Pediatric Neurology, Faculty of Medicine Izmir Katip Celebi University Izmir Turkey
| | - Nihal Olgaç Dündar
- Pediatric Neurology, Faculty of Medicine Izmir Katip Celebi University Izmir Turkey
| | - Uluç Yiş
- Pediatric Neurology, School of Medicine Dokuz Eylül University Izmir Turkey
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Pál E, Zima J, Hadzsiev K, Ito YA, Hartley T, Boycott KM, Melegh B. A novel pathogenic variant in TNPO3 in a Hungarian family with limb-girdle muscular dystrophy 1F. Eur J Med Genet 2019; 62:103662. [PMID: 31071488 DOI: 10.1016/j.ejmg.2019.05.001] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2018] [Revised: 04/30/2019] [Accepted: 05/04/2019] [Indexed: 12/20/2022]
Abstract
Limb-girdle muscular dystrophies (LGMDs) are a group of genetically heterogeneous muscular diseases that predominantly affect the proximal muscles. Pathogenic variants in TNPO3 have been associated with a rare, autosomal dominant limb-girdle muscular dystrophy 1F (LGMD1F) in a large Italian-Spanish family and an isolated LGMD1F case. Here we present two individuals from a Hungarian family with an early-onset, slowly progressive muscular dystrophy. Both the female proband and her affected son had delayed early motor milestones including first walking at 14 months and 18 months, respectively. Both present with progressive weakness of facial, bulbar, axial, and distal muscles especially of the lower extremities. Electromyography indicated myogenic damage and muscle biopsy from the proband showed myopathic alterations with sarcoplasmic masses and signs of mitochondrial dysfunction. Exome sequencing of the female proband identified a novel c.2767delC p.(Arg923AspfsTer17) variant in TNPO3. Sanger sequencing confirmed the presence of the TNPO3 variant in the affected son; the unaffected son did not have the variant. The identification of the c.2767delC variant further supports the clinical significance of TNPO3 and expands the clinical spectrum of TNPO3-associated LGMD1F.
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Affiliation(s)
- Endre Pál
- Department of Neurology, University of Pécs, Medical School, Pécs, Hungary; Neuropathology Unit, Department of Pathology, University of Pécs, Medical School, Pécs, Hungary.
| | - Judith Zima
- Department of Medical Genetics, University of Pécs, Medical School, Pécs, Hungary; Szentágothai Research Centre, University of Pécs, Pécs, Hungary
| | - Kinga Hadzsiev
- Department of Medical Genetics, University of Pécs, Medical School, Pécs, Hungary; Szentágothai Research Centre, University of Pécs, Pécs, Hungary
| | - Yoko A Ito
- Children's Hospital of Eastern Ontario Research Institute, University of Ottawa, Canada
| | - Taila Hartley
- Children's Hospital of Eastern Ontario Research Institute, University of Ottawa, Canada
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- Children's Hospital of Eastern Ontario Research Institute, University of Ottawa, Canada
| | - Kym M Boycott
- Children's Hospital of Eastern Ontario Research Institute, University of Ottawa, Canada
| | - Béla Melegh
- Department of Medical Genetics, University of Pécs, Medical School, Pécs, Hungary; Szentágothai Research Centre, University of Pécs, Pécs, Hungary
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Wang L, Zhang VW, Li S, Li H, Sun Y, Li J, Zhu Y, He R, Lin J, Zhang C. The clinical spectrum and genetic variability of limb-girdle muscular dystrophy in a cohort of Chinese patients. Orphanet J Rare Dis 2018; 13:133. [PMID: 30107846 PMCID: PMC6092860 DOI: 10.1186/s13023-018-0859-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2018] [Accepted: 06/27/2018] [Indexed: 12/19/2022] Open
Abstract
Background Limb-girdle muscular dystrophy (LGMD) is a commonly diagnosed hereditary muscular disorder, characterized by the progressive weakness of the limb-girdle muscles. Although the condition has been well-characterized, clinical and genetic heterogeneity can be observed in patients with LGMD. Here, we aimed to describe the clinical manifestations and genetic variability among a cohort of patients with LGMD in South China. Results We analyzed the clinical information, muscle magnetic resonance imaging (MRI) findings, and genetic results obtained from 30 patients (24 families) with clinically suspected LGMD. In 24 probands, 38 variants were found in total, of which 18 were shown to be novel. Among the 30 patients, the most common subtypes were dysferlinopathy in eight (26.67%), sarcoglycanopathies in eight [26.67%; LGMD 2C in three (10.00%), LGMD 2D in three (10.00%), and LGMD 2F in two (6.67%)], LGMD 2A in seven (23.33%), followed by LGMD 1B in three (10.00%), LGMD 2I in three (10.00%), and early onset recessive Emery-Dreifuss-like phenotype without cardiomyopathy in one (3.33%). Furthermore, we also observed novel clinical presentations for LGMD 1B, 2F, and 2I patients with hypermobility of the joints in the upper limbs, a LGMD 2F patient with delayed language development, and other manifestations. Moreover, distinct distributions of fatty infiltration in patients with LGMD 2A, dysferlinopathy, and the early onset recessive Emery-Dreifuss-like phenotype without cardiomyopathy were also observed based on muscle MRI results. Conclusions In this study, we expanded the clinical spectrum and genetic variability found in patients with LGMD, which provided additional insights into genotype and phenotype correlations in this disease. Electronic supplementary material The online version of this article (10.1186/s13023-018-0859-6) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Liang Wang
- Department of Neurology, National Key Clinical Department and Key Discipline of Neurology, The First Affiliated Hospital, Sun Yat-sen University, 58 Zhongshan 2 Road, Guangzhou, 510080, GD, China
| | - Victor Wei Zhang
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, 77030, USA.,AmCare Genomics Lab, Guangzhou, 510300, GD, China
| | - Shaoyuan Li
- AmCare Genomics Lab, Guangzhou, 510300, GD, China
| | - Huan Li
- Department of Neurology, National Key Clinical Department and Key Discipline of Neurology, The First Affiliated Hospital, Sun Yat-sen University, 58 Zhongshan 2 Road, Guangzhou, 510080, GD, China
| | - Yiming Sun
- Department of Health Care, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, 510080, GD, China
| | - Jing Li
- Department of Neurology, National Key Clinical Department and Key Discipline of Neurology, The First Affiliated Hospital, Sun Yat-sen University, 58 Zhongshan 2 Road, Guangzhou, 510080, GD, China
| | - Yuling Zhu
- Department of Neurology, National Key Clinical Department and Key Discipline of Neurology, The First Affiliated Hospital, Sun Yat-sen University, 58 Zhongshan 2 Road, Guangzhou, 510080, GD, China
| | - Ruojie He
- Department of Neurology, National Key Clinical Department and Key Discipline of Neurology, The First Affiliated Hospital, Sun Yat-sen University, 58 Zhongshan 2 Road, Guangzhou, 510080, GD, China
| | - Jinfu Lin
- Department of Neurology, National Key Clinical Department and Key Discipline of Neurology, The First Affiliated Hospital, Sun Yat-sen University, 58 Zhongshan 2 Road, Guangzhou, 510080, GD, China
| | - Cheng Zhang
- Department of Neurology, National Key Clinical Department and Key Discipline of Neurology, The First Affiliated Hospital, Sun Yat-sen University, 58 Zhongshan 2 Road, Guangzhou, 510080, GD, China.
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Making sense of the clinical spectrum of limb girdle muscular dystrophies. Pract Neurol 2018; 18:201-210. [DOI: 10.1136/practneurol-2017-001799] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/28/2018] [Indexed: 11/03/2022]
Abstract
The expansion of the spectrum of limb girdle muscular dystrophies (LGMDs) in recent years means that neurologists need to be familiar with the clinical clues that can help with their diagnosis. The LGMDs comprise a group of genetic myopathies that manifest as chronic progressive weakness of hip and shoulder girdles. Their inheritance is either autosomal dominant (LGMD1) or autosomal recessive (LGMD2). Their prevalence varies in different regions of the world; certain ethnic groups have documented founder mutations and this knowledge can facilitate the diagnosis. The clinical approach to LGMDs uses the age at onset, genetic transmission and clinical patterns of muscular weakness. Helpful clinical features that help to differentiate the various subtypes include: predominant upper girdle weakness, disproportionate respiratory muscle involvement, distal weakness, hip adductor weakness, ‘biceps lump’ and ‘diamond on quadriceps’ sign, calf hypertrophy, contractures and cardiac involvement. Almost half of patients with LGMD have such clinical clues. Investigations such as serum creatine kinase, electrophysiology, muscle biopsy and genetic studies can complement the clinical examination. In this review, we discuss diagnostic clinical pointers and comment on the differential diagnosis and relevant investigations, using illustrative case studies.
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