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Monforte M, Torchia E, Bortolani S, Ravera B, Ricci E, Silvestri G, Servidei S, Primiano G, Mirabella M, Sabatelli M, Mercuri E, Franceschi F, Calabresi P, Covino M, Tasca G. Hospital admissions from the emergency department of adult patients affected by myopathies. Eur J Neurol 2024; 31:e16214. [PMID: 38226549 DOI: 10.1111/ene.16214] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2023] [Revised: 12/23/2023] [Accepted: 01/04/2024] [Indexed: 01/17/2024]
Abstract
BACKGROUND AND PURPOSE Myopathies are associated with classic signs and symptoms, but also with possible life-threatening complications that may require assistance in an emergency setting. This phenomenon is understudied in the literature. We aimed to assess the presentation, management, and outcomes of clinical manifestations potentially related to a muscle disorder requiring referral to the adult emergency department (ED) and hospitalization. METHODS Anonymized patient data retrieved using the International Classification of Diseases, Ninth Revision codes related to muscle disorders over 4 years were retrospectively analyzed. Medical reports were evaluated to extract demographic and clinical variables, along with outcomes. Two groups were defined based on the presence (known diagnosis [KD] group) or absence (unknown diagnosis [UD] group) of a diagnosed muscle disorder at arrival. RESULTS A total of 244 patients were included, 51% of whom were affected by a known myopathy, predominantly limb-girdle muscular dystrophies and myotonic dystrophies. The main reasons for ED visits in the KD group were respiratory issues, worsening of muscle weakness, and gastrointestinal problems. Heart complications were less prevalent. In the UD group, 27 patients received a new diagnosis of a specific primary muscle disorder after the ED access, mostly an inflammatory myopathy. Death during hospitalization was recorded in 26 patients, with a higher rate in the KD group and in patients affected by mitochondrial and inflammatory myopathies. Sepsis and dyspnea were associated with increased death risk. CONCLUSIONS Respiratory complications are the most common reason for myopathic patients accessing the ED, followed by gastrointestinal issues. Infections are severe threats and, once hospitalized, these patients have relatively high mortality.
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Affiliation(s)
- Mauro Monforte
- Dipartimento di Neuroscienze, Organi di Senso e Torace, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Rome, Italy
| | | | - Sara Bortolani
- Dipartimento di Neuroscienze, Organi di Senso e Torace, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Rome, Italy
| | | | - Enzo Ricci
- Dipartimento di Neuroscienze, Organi di Senso e Torace, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Rome, Italy
- Università Cattolica del Sacro Cuore, Rome, Italy
| | - Gabriella Silvestri
- Dipartimento di Neuroscienze, Organi di Senso e Torace, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Rome, Italy
- Università Cattolica del Sacro Cuore, Rome, Italy
| | - Serenella Servidei
- Dipartimento di Neuroscienze, Organi di Senso e Torace, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Rome, Italy
- Università Cattolica del Sacro Cuore, Rome, Italy
| | - Guido Primiano
- Dipartimento di Neuroscienze, Organi di Senso e Torace, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Rome, Italy
| | - Massimiliano Mirabella
- Dipartimento di Neuroscienze, Organi di Senso e Torace, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Rome, Italy
- Università Cattolica del Sacro Cuore, Rome, Italy
| | - Mario Sabatelli
- Dipartimento di Neuroscienze, Organi di Senso e Torace, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Rome, Italy
- Università Cattolica del Sacro Cuore, Rome, Italy
- Centro Clinico NeMO Adulti, Rome, Italy
| | - Eugenio Mercuri
- Centro Clinico Nemo Pediatrico, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Roma, Italy
- Pediatric Neurology, Università Cattolica del Sacro Cuore, Roma, Italy
| | - Francesco Franceschi
- Università Cattolica del Sacro Cuore, Rome, Italy
- Emergency Department, Fondazione Policlinico Universitario A. Gemelli, IRCCS, Rome, Italy
| | - Paolo Calabresi
- Dipartimento di Neuroscienze, Organi di Senso e Torace, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Rome, Italy
- Università Cattolica del Sacro Cuore, Rome, Italy
| | - Marcello Covino
- Università Cattolica del Sacro Cuore, Rome, Italy
- Emergency Department, Fondazione Policlinico Universitario A. Gemelli, IRCCS, Rome, Italy
| | - Giorgio Tasca
- John Walton Muscular Dystrophy Research Centre Newcastle University Translational and Clinical Research Institute and Newcastle Hospitals NHS Foundation Trust, Newcastle upon Tyne, UK
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Nallamilli BRR, Pan Y, Sniderman King L, Jagannathan L, Ramachander V, Lucas A, Markind J, Colzani R, Hegde M. Combined sequence and copy number analysis improves diagnosis of limb girdle and other myopathies. Ann Clin Transl Neurol 2023; 10:2092-2104. [PMID: 37688281 PMCID: PMC10647006 DOI: 10.1002/acn3.51896] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2023] [Revised: 07/31/2023] [Accepted: 08/20/2023] [Indexed: 09/10/2023] Open
Abstract
OBJECTIVE Clinical and genetic heterogeneities make diagnosis of limb-girdle muscular dystrophy (LGMD) and other overlapping disorders of muscle weakness complicated and expensive. We aimed to develop a comprehensive next generation sequence-based multi-gene panel ("The Lantern Focused Neuromuscular Panel") to detect both sequence variants and copy number variants in one assay. METHODS Patients with clinical diagnosis of LGMD or other overlapping muscular dystrophies in the United States were tested by PerkinElmer Genomics in 2018-2021 via "The Lantern Project," a sponsored diagnostic testing program. Sixty-six genes related to LGMD subtypes- and other myopathies were investigated. Main outcomes were diagnostic yield, gene-variant spectrum, and LGMD subtypes' prevalence. RESULTS Molecular diagnosis was established in 19.6% (1266) of 6473 cases. Major genes contributing to LGMD were identified including CAPN3 (5.4%, 68), DYSF (4.0%, 51), GAA (3.7%, 47), ANO5 (3.6%, 45), and FKRP (2.7%, 34). Genes of other overlapping MD subtypes identified included PABPN1 (10.5%, 133), VCP (2.2%, 28), MYOT (1.2% 15), LDB3 (1.0%, 13), COL6A1 (1.5%, 19), FLNC (1.1%, 14), and DNAJB6 (0.8%, 10). Different sizes of copy number variants including single exon, multi-exon, and whole genes were identified in 7.5% (95) cases in genes including DMD, EMD, CAPN3, ANO5, SGCG, COL6A2, DOK7, and LAMA2. INTERPRETATION "The Lantern Focused Neuromuscular Panel" enables identification of LGMD subtypes and other myopathies with overlapping clinical features. Prevalence of some MD subtypes was higher than previously reported. Widespread deployment of this comprehensive NGS panel has the potential to ensure early, accurate diagnosis as well as re-define MD epidemiology.
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Belhassen I, Laroussi S, Sakka S, Rekik S, Lahkim L, Dammak M, Authier FJ, Mhiri C. Dysferlinopathy in Tunisia: clinical spectrum, genetic background and prognostic profile. Neuromuscul Disord 2023; 33:718-727. [PMID: 37716854 DOI: 10.1016/j.nmd.2023.08.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Revised: 08/08/2023] [Accepted: 08/13/2023] [Indexed: 09/18/2023]
Abstract
Dysferlinopathy is a rare group of hereditary muscular dystrophy with an autosomal recessive mode of inheritance caused by a mutation in the DYSF gene. It encodes for the dysferlin protein, which has a crucial role in multiple cellular processes, including muscle fiber membrane repair. This deficit has heterogeneous clinical presentations. In this study, we collected 20 Tunisian patients with a sex ratio of 1 and a median age of 50.5 years old (Interquartile range (IQR) = [36,5-54,75]). They were followed for periods ranging from 5 to 48 years. The median age at onset was 17 years old (IQR = [16,8-28,4]). Five major phenotypes were identified: Limb-girdle muscular dystrophy (LGMDR2) (35%), a proximodistal phenotype (35%), Miyoshi myopathy (10%), Distal myopathy with anterior tibial onset (DMAT) (10%), and asymptomatic HyperCKemia (10%). At the last evaluation, more than half of patients (55%) were on wheelchair. Loss of ambulation occurred generally during the fourth decade. After 20 years of disease progression, two patients with a proximodistal phenotype (10%) developed dilated cardiomyopathy and mitral valve regurgitation. Restrictive respiratory syndrome was observed in three patients (DMAT: 1 patient, proximodistal phenotype: 1 patient, LGMDR2: 1 patient). Genetic study disclosed five mutations. We observed clinical heterogeneity between families and even within the same family. Disease progression was mainly slow to intermediate regardless of the phenotype.
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Affiliation(s)
- Ikhlass Belhassen
- Laboratory of Neurogenetics, Parkinson's Disease and Cerebrovascular Disease (LR-12-SP-19), Habib Bourguiba University Hospital, University of Sfax, Tunisia
| | - Sirine Laroussi
- Laboratory of Neurogenetics, Parkinson's Disease and Cerebrovascular Disease (LR-12-SP-19), Habib Bourguiba University Hospital, University of Sfax, Tunisia; Department of Neurology, Habib Bourguiba University Hospital, Faculty of Medicine of Sfax, Sfax, Tunisia.
| | - Salma Sakka
- Department of Neurology, Habib Bourguiba University Hospital, Faculty of Medicine of Sfax, Sfax, Tunisia
| | - Sabrine Rekik
- Laboratory of Neurogenetics, Parkinson's Disease and Cerebrovascular Disease (LR-12-SP-19), Habib Bourguiba University Hospital, University of Sfax, Tunisia
| | - Laila Lahkim
- Pathology Laboratory, Habib Bourguiba University Hospital, Sfax, Tunisia
| | - Mariem Dammak
- Laboratory of Neurogenetics, Parkinson's Disease and Cerebrovascular Disease (LR-12-SP-19), Habib Bourguiba University Hospital, University of Sfax, Tunisia; Clinical Investigation Center, Habib Bourguiba University Hospital, Sfax, Tunisia; Department of Neurology, Habib Bourguiba University Hospital, Faculty of Medicine of Sfax, Sfax, Tunisia
| | | | - Chokri Mhiri
- Laboratory of Neurogenetics, Parkinson's Disease and Cerebrovascular Disease (LR-12-SP-19), Habib Bourguiba University Hospital, University of Sfax, Tunisia; Clinical Investigation Center, Habib Bourguiba University Hospital, Sfax, Tunisia; Department of Neurology, Habib Bourguiba University Hospital, Faculty of Medicine of Sfax, Sfax, Tunisia
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Jeong SY, Choi JH, Kim J, Woo JS, Lee EH. Tripartite Motif-Containing Protein 32 (TRIM32): What Does It Do for Skeletal Muscle? Cells 2023; 12:2104. [PMID: 37626915 PMCID: PMC10453674 DOI: 10.3390/cells12162104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2023] [Revised: 08/07/2023] [Accepted: 08/18/2023] [Indexed: 08/27/2023] Open
Abstract
Tripartite motif-containing protein 32 (TRIM32) is a member of the tripartite motif family and is highly conserved from flies to humans. Via its E3 ubiquitin ligase activity, TRIM32 mediates and regulates many physiological and pathophysiological processes, such as growth, differentiation, muscle regeneration, immunity, and carcinogenesis. TRIM32 plays multifunctional roles in the maintenance of skeletal muscle. Genetic variations in the TRIM32 gene are associated with skeletal muscular dystrophies in humans, including limb-girdle muscular dystrophy type 2H (LGMD2H). LGMD2H-causing genetic variations of TRIM32 occur most frequently in the C-terminal NHL (ncl-1, HT2A, and lin-41) repeats of TRIM32. LGMD2H is characterized by skeletal muscle dystrophy, myopathy, and atrophy. Surprisingly, most patients with LGMD2H show minimal or no dysfunction in other tissues or organs, despite the broad expression of TRIM32 in various tissues. This suggests more prominent roles for TRIM32 in skeletal muscle than in other tissues or organs. This review is focused on understanding the physiological roles of TRIM32 in skeletal muscle, the pathophysiological mechanisms mediated by TRIM32 genetic variants in LGMD2H patients, and the correlations between TRIM32 and Duchenne muscular dystrophy (DMD).
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Affiliation(s)
- Seung Yeon Jeong
- Department of Physiology, College of Medicine, The Catholic University of Korea, Seoul 06591, Republic of Korea
- Department of Biomedicine & Health Sciences, Graduate School, The Catholic University of Korea, Seoul 06591, Republic of Korea
| | - Jun Hee Choi
- Department of Physiology, College of Medicine, The Catholic University of Korea, Seoul 06591, Republic of Korea
- Department of Biomedicine & Health Sciences, Graduate School, The Catholic University of Korea, Seoul 06591, Republic of Korea
| | - Jooho Kim
- Department of Physiology, College of Medicine, The Catholic University of Korea, Seoul 06591, Republic of Korea
- Department of Biomedicine & Health Sciences, Graduate School, The Catholic University of Korea, Seoul 06591, Republic of Korea
| | - Jin Seok Woo
- Department of Physiology, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, CA 10833, USA
| | - Eun Hui Lee
- Department of Physiology, College of Medicine, The Catholic University of Korea, Seoul 06591, Republic of Korea
- Department of Biomedicine & Health Sciences, Graduate School, The Catholic University of Korea, Seoul 06591, Republic of Korea
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Johnston K, Casstevens C, Patel VP, Merikle E, Presnall C, Audhya I. Concept Elicitation Interviews and Conceptual Model to Understand the Patient Experience of Limb Girdle Muscular Dystrophy. Adv Ther 2023; 40:2296-2310. [PMID: 36917428 PMCID: PMC10130098 DOI: 10.1007/s12325-023-02463-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2022] [Accepted: 02/15/2023] [Indexed: 03/16/2023]
Abstract
INTRODUCTION Limb girdle muscular dystrophies (LGMDs) are a group of rare and heterogeneous disorders involving progressive wasting of shoulder and pelvic girdle musculature. This study aimed to generate qualitative evidence on patient and caregiver experiences with symptoms and impacts of LGMD on overall function and daily life for sarcoglycanopathy subtypes 2C/R5, 2D/R3, and 2E/R4. METHODS Twenty-three individuals with LGMD with (n = 5) or without (n = 18) a caregiver participated in 60-minute semi-structured video interviews. Interview transcripts were analyzed using thematic analysis. Differences in patient experience by ambulation status and LGMD subtype were examined. RESULTS Participants were ambulatory (n = 14) and non-ambulatory (n = 9), representing three subtypes: 2C/R5 (n = 4), 2D/R3 (n = 12), and 2E/R4 (n = 7), with mean age of 34.8 years (SD = 16.08). 56.5% identified as female. Conceptual saturation was achieved within 18/23 interviews. Ambulatory participants identified difficulty with complex physical activities, e.g., running (n = 11, 78.6%), physical strength (n = 14, 100%), and difficulty with transfers, e.g., difficulty getting off the floor (n = 10, 71.4%). All non-ambulatory participants discussed problems with activities of daily living (ADLs) and transfers, e.g., getting in/out of bed and upper extremity function, particularly reaching (n = 8, 88.9%) and fine motor skills (n = 6, 66.7%). Fatigue and pain were reported by the majority of participants (n = 16, 69.6% and n = 19, 82.6%, respectively). A conceptual disease model was developed illustrating symptoms and impacts and their relationships to disease stage, capturing the patient experience across LGMD disease trajectory. CONCLUSIONS This study contributes to the limited evidence describing the patient experience of living with LGMD. The conceptual model can inform patient-centered assessment in future LGMD clinical trials.
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García-Giménez JL, García-Trevijano ER, Avilés-Alía AI, Ibañez-Cabellos JS, Bovea-Marco M, Bas T, Pallardó FV, Viña JR, Zaragozá R. Identification of circulating miRNAs differentially expressed in patients with Limb-girdle, Duchenne or facioscapulohumeral muscular dystrophies. Orphanet J Rare Dis 2022; 17:450. [PMID: 36575500 PMCID: PMC9793535 DOI: 10.1186/s13023-022-02603-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2022] [Accepted: 12/19/2022] [Indexed: 12/29/2022] Open
Abstract
BACKGROUND Limb-girdle muscular dystrophy (LGMD) is a rare neuromuscular disease including a growing and heterogeneous number of subtypes with variable phenotype. Their clinical and histopathological characteristics frequently overlap with other neuromuscular dystrophies. Our goal was to identify, by a non-invasive method, a molecular signature including biochemical and epigenetic parameters with potential value for patient prognosis and stratification. RESULTS Circulating miRNome was obtained by smallRNA-seq in plasma from LGMD patients (n = 6) and matched-controls (n = 6). Data, validated by qPCR in LGMD samples, were also examined in other common muscular dystrophies: Duchenne (DMD) (n = 5) and facioscapulohumeral muscular dystrophy (FSHD) (n = 4). Additionally, biochemical and clinical parameters were analyzed. miRNome analysis showed that thirteen differentially expressed miRs could separate LGMD vs control group by hierarchical clustering. Most of differentially expressed miRs in LGMD patients were up-regulated (miR-122-5p, miR-122b-3p, miR-6511a-3p, miR-192-5p, miR-574-3p, mir-885-3p, miR-29a-3p, miR-4646-3p, miR-203a-3p and miR-203b-5p) whilst only three of sequenced miRs were significantly down-regulated (miR-19b-3p, miR-7706, miR-323b-3p) when compared to matched controls. Bioinformatic analysis of target genes revealed cell cycle, muscle tissue development, regeneration and senescence as the most affected pathways. Four of these circulating miRs (miR-122-5p, miR-192-5p, miR-19b-3p and miR-323b-3p), together with the myomiR miR-206, were further analysed by qPCR in LGMD, DMD and FSHD. The receiver operating characteristic curves (ROC) revealed high area under the curve (AUC) values for selected miRs in all groups, indicating that these miRs have good sensitivity and specificity to distinguish LGMD, DMD and FSHD patients from healthy controls. miR-122-5p, miR-192-5p and miR-323-3p were differentially expressed compared to matched-controls in all groups but apparently, each type of muscular dystrophy showed a specific pattern of miR expression. Finally, a strong correlation between miRs and biochemical data was only found in LGMD patients: while miR-192-5p and miR-122-5p negatively correlated with CK, miR-192-5p positively correlated with vitamin D3 and ALP. CONCLUSIONS Although limited by the small number of patients included in this study, we propose here a specific combination of circulating miR-122-5p/miR-192-5p/miR-323-3 and biochemical parameters as a potential molecular signature whose clinical value for LGMD patient prognosis and stratification should be further confirmed in a larger cohort of patients.
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Affiliation(s)
- José Luis García-Giménez
- grid.413448.e0000 0000 9314 1427Center for Biomedical Network Research On Rare Diseases (CIBERER), Institute of Health Carlos III, Valencia, Spain ,grid.429003.c0000 0004 7413 8491INCLIVA Health Research Institute, Valencia, Spain ,grid.5338.d0000 0001 2173 938XDepartment of Physiology, Faculty of Medicine and Dentistry, University of Valencia, Valencia, Spain ,EpiDisease S.L. (Spin-Off CIBERER), Valencia, Spain
| | - Elena R. García-Trevijano
- grid.429003.c0000 0004 7413 8491INCLIVA Health Research Institute, Valencia, Spain ,grid.5338.d0000 0001 2173 938XDepartment of Biochemistry and Molecular Biology, Faculty of Medicine and Dentistry, University of Valencia, Valencia, Spain
| | - Ana I. Avilés-Alía
- grid.5338.d0000 0001 2173 938XDepartment of Biochemistry and Molecular Biology, Faculty of Medicine and Dentistry, University of Valencia, Valencia, Spain
| | | | | | - Teresa Bas
- Institute for Health Research La Fe, IISLaFe, Valencia, Spain ,grid.84393.350000 0001 0360 9602Spine Surgery Unit, Hospital Universitari i Politècnic La Fe, Valencia, Spain
| | - Federico V. Pallardó
- grid.413448.e0000 0000 9314 1427Center for Biomedical Network Research On Rare Diseases (CIBERER), Institute of Health Carlos III, Valencia, Spain ,grid.429003.c0000 0004 7413 8491INCLIVA Health Research Institute, Valencia, Spain ,grid.5338.d0000 0001 2173 938XDepartment of Physiology, Faculty of Medicine and Dentistry, University of Valencia, Valencia, Spain
| | - Juan R. Viña
- grid.429003.c0000 0004 7413 8491INCLIVA Health Research Institute, Valencia, Spain ,grid.5338.d0000 0001 2173 938XDepartment of Biochemistry and Molecular Biology, Faculty of Medicine and Dentistry, University of Valencia, Valencia, Spain
| | - Rosa Zaragozá
- INCLIVA Health Research Institute, Valencia, Spain. .,Department of Human Anatomy and Embryology, Faculty of Medicine and Dentistry, University of Valencia, Avda. Blasco Ibañez 15, 46010, Valencia, Spain.
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Choi JH, Jeong SY, Kim J, Woo JS, Lee EH. Tripartite motif-containing protein 32 regulates Ca 2+ movement in skeletal muscle. Am J Physiol Cell Physiol 2022; 323:C1860-C1871. [PMID: 36374170 DOI: 10.1152/ajpcell.00426.2022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Mutations in tripartite motif-containing protein 32 (TRIM32), especially in NHL repeats, have been found in skeletal muscle in patients with type 2H limb-girdle muscular dystrophy (LGMD2H). However, the roles of the NHL repeats of TRIM32 in skeletal muscle functions have not been well addressed. In the present study, to examine the functional role(s) of the TRIM32 NHL repeats in skeletal muscle, TRIM32-binding proteins in skeletal muscle were first searched using a binding assay and MALDI-TOF/TOF. Sarcoplasmic/endoplasmic reticulum Ca2+-ATPase 1a (SERCA1a) was found to be a TRIM32-binding protein. Next, a deletion mutant of TRIM32 missing the NHL repeats (NHL-Del) was expressed in mouse primary skeletal myotubes during myoblast differentiation into myotubes. Ca2+ movement in the myotubes was examined using single-cell Ca2+ imaging. Unlike wild-type (WT) TRIM32, NHL-Del did not enhance the amount of Ca2+ release from the sarcoplasmic reticulum (SR), Ca2+ release for excitation-contraction (EC) coupling, or extracellular Ca2+ entry via store-operated Ca2+ entry (SOCE). In addition, even compared with the vector control, NHL-Del resulted in reduced SOCE due to reduced expression of extracellular Ca2+ entry channels. Transmission electron microscopy (TEM) observation of the myotubes revealed that NHL-Del induced the formation of abnormal vacuoles and tubular structures in the cytosol. Therefore, by binding to SERCA1a via its NHL repeats, TRIM32 may participate in the regulation of Ca2+ movement for skeletal muscle contraction and the formation of cellular vacuoles and tubular structures in skeletal muscle. Functional defects in TRIM32 due to mutations in NHL repeats may be pathogenic toward LGMD2H.
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Affiliation(s)
- Jun Hee Choi
- Department of Physiology, College of Medicine, The Catholic University of Korea, Seoul, Korea.,Department of Biomedicine & Health Sciences, Graduate School, The Catholic University of Korea, Seoul, Korea
| | - Seung Yeon Jeong
- Department of Physiology, College of Medicine, The Catholic University of Korea, Seoul, Korea.,Department of Biomedicine & Health Sciences, Graduate School, The Catholic University of Korea, Seoul, Korea
| | - Jooho Kim
- Department of Physiology, College of Medicine, The Catholic University of Korea, Seoul, Korea.,Department of Biomedicine & Health Sciences, Graduate School, The Catholic University of Korea, Seoul, Korea
| | - Jin Seok Woo
- Department of Physiology, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, California
| | - Eun Hui Lee
- Department of Physiology, College of Medicine, The Catholic University of Korea, Seoul, Korea.,Department of Biomedicine & Health Sciences, Graduate School, The Catholic University of Korea, Seoul, Korea
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Inherited myopathies in the Middle East and North Africa. GENE REPORTS 2022. [DOI: 10.1016/j.genrep.2022.101674] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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9
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Clinical, genetic profile and disease progression of sarcoglycanopathies in a large cohort from India: high prevalence of SGCB c.544A > C. Neurogenetics 2022; 23:187-202. [DOI: 10.1007/s10048-022-00690-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2021] [Accepted: 03/08/2022] [Indexed: 10/18/2022]
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Cerino M, González-Hormazábal P, Abaji M, Courrier S, Puppo F, Mathieu Y, Trangulao A, Earle N, Castiglioni C, Díaz J, Campero M, Hughes R, Vargas C, Cortés R, Kleinsteuber K, Acosta I, Urtizberea JA, Lévy N, Bartoli M, Krahn M, Jara L, Caviedes P, Gorokhova S, Bevilacqua JA. Genetic Profile of Patients with Limb-Girdle Muscle Weakness in the Chilean Population. Genes (Basel) 2022; 13:genes13061076. [PMID: 35741838 PMCID: PMC9223019 DOI: 10.3390/genes13061076] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2022] [Revised: 06/04/2022] [Accepted: 06/13/2022] [Indexed: 11/16/2022] Open
Abstract
Hereditary myopathies are a group of genetically determined muscle disorders comprising more than 300 entities. In Chile, there are no specific registries of the distinct forms of these myopathies. We now report the genetic findings of a series of Chilean patients presenting with limb-girdle muscle weakness of unknown etiology. Eighty-two patients were explored using high-throughput sequencing approaches with neuromuscular gene panels, establishing a definite genetic diagnosis in 49 patients (59.8%) and a highly probable genetic diagnosis in eight additional cases (9.8%). The most frequent causative genes identified were DYSF and CAPN3, accounting for 22% and 8.5% of the cases, respectively, followed by DMD (4.9%) and RYR1 (4.9%). The remaining 17 causative genes were present in one or two cases only. Twelve novel variants were identified. Five patients (6.1%) carried a variant of uncertain significance in genes partially matching the clinical phenotype. Twenty patients (24.4%) did not carry a pathogenic or likely pathogenic variant in the phenotypically related genes, including five patients (6.1%) presenting an autoimmune neuromuscular disorder. The relative frequency of the different forms of myopathy in Chile is like that of other series reported from different regions of the world with perhaps a relatively higher incidence of dysferlinopathy.
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Affiliation(s)
- Mathieu Cerino
- Marseille Medical Genetics Université, INSERM, U 1251, Aix-Marseille Université, 13005 Marseille, France; (M.C.); (M.A.); (S.C.); (F.P.); (Y.M.); (N.L.); (M.B.); (M.K.); (S.G.)
| | - Patricio González-Hormazábal
- Programa de Genética Humana, Instituto de Ciencias Biomédicas (ICBM), Facultad de Medicina, Universidad de Chile, Santiago 8380492, Chile; (P.G.-H.); (A.T.); (L.J.)
| | - Mario Abaji
- Marseille Medical Genetics Université, INSERM, U 1251, Aix-Marseille Université, 13005 Marseille, France; (M.C.); (M.A.); (S.C.); (F.P.); (Y.M.); (N.L.); (M.B.); (M.K.); (S.G.)
| | - Sebastien Courrier
- Marseille Medical Genetics Université, INSERM, U 1251, Aix-Marseille Université, 13005 Marseille, France; (M.C.); (M.A.); (S.C.); (F.P.); (Y.M.); (N.L.); (M.B.); (M.K.); (S.G.)
| | - Francesca Puppo
- Marseille Medical Genetics Université, INSERM, U 1251, Aix-Marseille Université, 13005 Marseille, France; (M.C.); (M.A.); (S.C.); (F.P.); (Y.M.); (N.L.); (M.B.); (M.K.); (S.G.)
| | - Yves Mathieu
- Marseille Medical Genetics Université, INSERM, U 1251, Aix-Marseille Université, 13005 Marseille, France; (M.C.); (M.A.); (S.C.); (F.P.); (Y.M.); (N.L.); (M.B.); (M.K.); (S.G.)
| | - Alejandra Trangulao
- Programa de Genética Humana, Instituto de Ciencias Biomédicas (ICBM), Facultad de Medicina, Universidad de Chile, Santiago 8380492, Chile; (P.G.-H.); (A.T.); (L.J.)
- Unidad Neuromuscular, Departamento Neurología y Neurocirugía, Hospital Clínico Universidad de Chile, Santiago 8380492, Chile; (M.C.); (R.H.)
- Unidad de Patología Neuromuscular, Departamento de Neurología y Neurocirugía, Clínica Dávila, Santiago 8431657, Chile; (N.E.); (I.A.)
- Departamento de Anatomía y Medicina Legal, Facultad de Medicina, Universidad de Chile, Santiago 8380456, Chile
| | - Nicholas Earle
- Unidad de Patología Neuromuscular, Departamento de Neurología y Neurocirugía, Clínica Dávila, Santiago 8431657, Chile; (N.E.); (I.A.)
| | - Claudia Castiglioni
- Unidad de Neurología, Departamento de Pediatría, Clínica Las Condes, Santiago 7591047, Chile; (C.C.); (R.C.); (K.K.)
| | - Jorge Díaz
- Centro de Imagenología, Hospital Clínico Universidad de Chile, Santiago 8380492, Chile;
| | - Mario Campero
- Unidad Neuromuscular, Departamento Neurología y Neurocirugía, Hospital Clínico Universidad de Chile, Santiago 8380492, Chile; (M.C.); (R.H.)
| | - Ricardo Hughes
- Unidad Neuromuscular, Departamento Neurología y Neurocirugía, Hospital Clínico Universidad de Chile, Santiago 8380492, Chile; (M.C.); (R.H.)
| | - Carmen Vargas
- Neurología Pediátrica Hospital Roberto del Río, Universidad de Chile, Santiago 8380492, Chile;
| | - Rocío Cortés
- Unidad de Neurología, Departamento de Pediatría, Clínica Las Condes, Santiago 7591047, Chile; (C.C.); (R.C.); (K.K.)
- Neurología Pediátrica Hospital Roberto del Río, Universidad de Chile, Santiago 8380492, Chile;
| | - Karin Kleinsteuber
- Unidad de Neurología, Departamento de Pediatría, Clínica Las Condes, Santiago 7591047, Chile; (C.C.); (R.C.); (K.K.)
- Neurología Pediátrica Hospital Roberto del Río, Universidad de Chile, Santiago 8380492, Chile;
| | - Ignacio Acosta
- Unidad de Patología Neuromuscular, Departamento de Neurología y Neurocirugía, Clínica Dávila, Santiago 8431657, Chile; (N.E.); (I.A.)
| | | | - Nicolas Lévy
- Marseille Medical Genetics Université, INSERM, U 1251, Aix-Marseille Université, 13005 Marseille, France; (M.C.); (M.A.); (S.C.); (F.P.); (Y.M.); (N.L.); (M.B.); (M.K.); (S.G.)
- Department of Medical Genetics, Hôpital Timone Enfants, APHM, 13385 Marseille, France
| | - Marc Bartoli
- Marseille Medical Genetics Université, INSERM, U 1251, Aix-Marseille Université, 13005 Marseille, France; (M.C.); (M.A.); (S.C.); (F.P.); (Y.M.); (N.L.); (M.B.); (M.K.); (S.G.)
| | - Martin Krahn
- Marseille Medical Genetics Université, INSERM, U 1251, Aix-Marseille Université, 13005 Marseille, France; (M.C.); (M.A.); (S.C.); (F.P.); (Y.M.); (N.L.); (M.B.); (M.K.); (S.G.)
- Department of Medical Genetics, Hôpital Timone Enfants, APHM, 13385 Marseille, France
| | - Lilian Jara
- Programa de Genética Humana, Instituto de Ciencias Biomédicas (ICBM), Facultad de Medicina, Universidad de Chile, Santiago 8380492, Chile; (P.G.-H.); (A.T.); (L.J.)
| | - Pablo Caviedes
- Programa de Farmacología Molecular y Clínica, ICBM, Facultad de Medicina, Universidad de Chile, Santiago 8380492, Chile;
- Centro de Biotecnología y Bioingeniería (CeBiB), Departamento de Ingeniería Química, Biotecnología y Biomateriales, Facultad de Ciencias Físicas y Matemáticas, Universidad de Chile, Santiago 8380492, Chile
| | - Svetlana Gorokhova
- Marseille Medical Genetics Université, INSERM, U 1251, Aix-Marseille Université, 13005 Marseille, France; (M.C.); (M.A.); (S.C.); (F.P.); (Y.M.); (N.L.); (M.B.); (M.K.); (S.G.)
- Department of Medical Genetics, Hôpital Timone Enfants, APHM, 13385 Marseille, France
| | - Jorge A. Bevilacqua
- Unidad Neuromuscular, Departamento Neurología y Neurocirugía, Hospital Clínico Universidad de Chile, Santiago 8380492, Chile; (M.C.); (R.H.)
- Unidad de Patología Neuromuscular, Departamento de Neurología y Neurocirugía, Clínica Dávila, Santiago 8431657, Chile; (N.E.); (I.A.)
- Departamento de Anatomía y Medicina Legal, Facultad de Medicina, Universidad de Chile, Santiago 8380456, Chile
- Correspondence:
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11
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Audhya IF, Cheung A, Szabo SM, Flint E, Weihl CC, Gooch KL. Progression to Loss of Ambulation Among Patients with Autosomal Recessive Limb-girdle Muscular Dystrophy: A Systematic Review. J Neuromuscul Dis 2022; 9:477-492. [PMID: 35527561 PMCID: PMC9398075 DOI: 10.3233/jnd-210771] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022]
Abstract
Background The impact of age at autosomal recessive limb girdle muscular dystrophy (LGMDR) onset on progression to loss of ambulation (LOA) has not been well established, particularly by subtype. Objectives: To describe the characteristics of patients with adult-, late childhood-, and early childhood-onset LGMDR by subtype and characterize the frequency and timing of LOA. Methods: A systematic review was conducted in MEDLINE, Embase and the Cochrane library. Frequency and timing of LOA in patients with LGMDR1, LGMDR2/Miyoshi myopathy (MM), LGMDR3-6, LGMDR9, and LGMDR12 were synthesized from published data. Results: In 195 studies, 695 (43.4%) patients had adult-, 532 (33.2%) had late childhood-, and 376 (23.5%) had early childhood-onset of disease across subtypes among those with a reported age at onset (n = 1,603); distribution of age at onset varied between subtypes. Among patients with LOA (n = 228), adult-onset disease was uncommon in LGMDR3-6 (14%) and frequent in LGMDR2/MM (42%); LGMDR3-6 cases with LOA primarily had early childhood-onset (74%). Mean (standard deviation [SD]) time to LOA varied between subtypes and was shortest for patients with early childhood-onset LGMDR9 (12.0 [4.9] years, n = 19) and LGMDR3-6 (12.3 [10.7], n = 56) and longest for those with late childhood-onset LGMDR2/MM (21.4 [11.5], n = 36). Conclusions: This review illustrated that patients with early childhood-onset disease tend to have faster progression to LOA than those with late childhood- or adult-onset disease, particularly in LGMDR9. These findings provide a greater understanding of progression to LOA by LGMDR subtype, which may help inform clinical trial design and provide a basis for natural history studies.
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Affiliation(s)
| | | | | | - Emma Flint
- Broadstreet HEOR, Vancouver, BC, V6A 1A4 Canada
| | - Conrad C Weihl
- Washington University School of Medicine, St.Louis, MO, USA
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12
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Alharbi N, Matar R, Cupler E, Al-Hindi H, Murad H, Alhomud I, Monies D, Alshehri A, Alyahya M, Meyer B, Bohlega S. Clinical, Neurophysiological, Radiological, Pathological, and Genetic Features of Dysferlinopathy in Saudi Arabia. Front Neurosci 2022; 16:815556. [PMID: 35273475 PMCID: PMC8902167 DOI: 10.3389/fnins.2022.815556] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2021] [Accepted: 01/31/2022] [Indexed: 11/13/2022] Open
Abstract
BackgroundTo characterize the phenotypic, neurophysiological, radiological, pathological, and genetic profile of 33 Saudi Arabian families with dysferlinopathy.MethodsA descriptive observational study was done on a cohort of 112 Saudi Arabian families with LGMD. Screening for the Dysferlin (DYSF) gene was done in a tertiary care referral hospital in Saudi Arabia. Clinical, Neurophysiological, Radiological, Pathological, and Genetic findings in subjects with dysferlin mutation were the primary outcome variables. Statistical analysis was done by Epi-info.Results33 out of 112 families (29.46%) registered in the LGMD cohort had Dysferlinopathy. 53 subjects (28 males, 52.83%) from 33 families were followed up for various periods ranging from 1 to 28 years. The mean age of onset was 17.79 ± 3.48 years (Range 10 to 25 years). Miyoshi Myopathy phenotype was observed in 50.94% (27 out of 53), LGMDR2 phenotype in 30.19% (16 out of 53), and proximodistal phenotype in 15.09% (8 out of 53) of the subjects. Loss of ambulation was observed in 39.62% (21 out of 53 subjects). Electrophysiological, Radiological, and histopathological changes were compatible with the diagnosis. Mean serum Creatinine Kinase was 6,464.45 ± 4,149.24 with a range from 302 to 21,483 IU/L. In addition, 13 dysferlin mutations were identified two of them were compound heterozygous. One founder mutation was observed c.164_165insA in 19 unrelated families.ConclusionThe prevalence of Dysferlinopathy was 29.46% in the native Saudi LGMD cohort. It is the most prevalent subtype seconded by calpainopathy. The clinical course varied among the study subjects and was consistent with those reported from different ethnic groups. One founder mutation was identified. Initial screening of the founder mutations in new families is highly recommended.
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Affiliation(s)
- Norah Alharbi
- Department of Clinical Science, College of Medicine, Princess Nourah Bint Abdulrahman University, Riyadh, Saudi Arabia
| | | | - Edward Cupler
- Department of Neuroscience, King Faisal Specialist Hospital, and Research Center, Jeddah, Saudi Arabia
| | - Hindi Al-Hindi
- Department of Pathology and Laboratory Medicine, King Faisal Specialist Hospital and Research Center, Riyadh, Saudi Arabia
| | - Hatem Murad
- Department of Neuroscience, King Faisal Specialist Hospital and Research Center, Riyadh, Saudi Arabia
| | - Iftteah Alhomud
- Department of Neuroscience, King Faisal Specialist Hospital and Research Center, Riyadh, Saudi Arabia
| | - Dorota Monies
- Department of Genetics, King Faisal Specialist Hospital and Research Center, Riyadh, Saudi Arabia
| | - Ali Alshehri
- Department of Neuroscience, King Faisal Specialist Hospital and Research Center, Riyadh, Saudi Arabia
| | - Mossaed Alyahya
- Department of Neuroscience, King Faisal Specialist Hospital and Research Center, Riyadh, Saudi Arabia
| | - Brian Meyer
- Department of Genetics, King Faisal Specialist Hospital and Research Center, Riyadh, Saudi Arabia
| | - Saeed Bohlega
- Department of Neuroscience, King Faisal Specialist Hospital and Research Center, Riyadh, Saudi Arabia
- *Correspondence: Saeed Bohlega,
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13
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Abstract
The limb-girdle muscular dystrophies (LGMD) are a collection of genetic diseases united in their phenotypical expression of pelvic and shoulder area weakness and wasting. More than 30 subtypes have been identified, five dominant and 26 recessive. The increase in the characterization of new genotypes in the family of LGMDs further adds to the heterogeneity of the disease. Meanwhile, better understanding of the phenotype led to the reconsideration of the disease definition, which resulted in eight old subtypes to be no longer recognized officially as LGMD and five new diseases to be added to the LGMD family. The unique variabilities of LGMD stem from genetic mutations, which then lead to protein and ultimately muscle dysfunction. Herein, we review the LGMD pathway, starting with the genetic mutations that encode proteins involved in muscle maintenance and repair, and including the genotype–phenotype relationship of the disease, the epidemiology, disease progression, burden of illness, and emerging treatments.
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14
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Bawa S, Piccirillo R, Geisbrecht ER. TRIM32: A Multifunctional Protein Involved in Muscle Homeostasis, Glucose Metabolism, and Tumorigenesis. Biomolecules 2021; 11:biom11030408. [PMID: 33802079 PMCID: PMC7999776 DOI: 10.3390/biom11030408] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Revised: 03/05/2021] [Accepted: 03/06/2021] [Indexed: 12/13/2022] Open
Abstract
Human tripartite motif family of proteins 32 (TRIM32) is a ubiquitous multifunctional protein that has demonstrated roles in differentiation, muscle physiology and regeneration, and tumor suppression. Mutations in TRIM32 result in two clinically diverse diseases. A mutation in the B-box domain gives rise to Bardet–Biedl syndrome (BBS), a disease whose clinical presentation shares no muscle pathology, while mutations in the NHL (NCL-1, HT2A, LIN-41) repeats of TRIM32 causes limb-girdle muscular dystrophy type 2H (LGMD2H). TRIM32 also functions as a tumor suppressor, but paradoxically is overexpressed in certain types of cancer. Recent evidence supports a role for TRIM32 in glycolytic-mediated cell growth, thus providing a possible mechanism for TRIM32 in the accumulation of cellular biomass during regeneration and tumorigenesis, including in vitro and in vivo approaches, to understand the broad spectrum of TRIM32 functions. A special emphasis is placed on the utility of the Drosophila model, a unique system to study glycolysis and anabolic pathways that contribute to the growth and homeostasis of both normal and tumor tissues.
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Affiliation(s)
- Simranjot Bawa
- Department of Biochemistry and Molecular Biophysics, Kansas State University, Manhattan, KS 66506, USA;
| | - Rosanna Piccirillo
- Department of Neuroscience, Istituto di Ricerche Farmacologiche Mario Negri IRCCS, 20156 Milan, Italy;
| | - Erika R. Geisbrecht
- Department of Biochemistry and Molecular Biophysics, Kansas State University, Manhattan, KS 66506, USA;
- Correspondence: ; Tel.: +1-(785)-532-3105
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15
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Chen Q, Zheng W, Xu H, Yang Y, Song Z, Yuan L, Deng H. Digenic Variants in the TTN and TRAPPC11 Genes Co-segregating With a Limb-Girdle Muscular Dystrophy in a Han Chinese Family. Front Neurosci 2021; 15:601757. [PMID: 33746696 PMCID: PMC7969792 DOI: 10.3389/fnins.2021.601757] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2020] [Accepted: 02/10/2021] [Indexed: 11/22/2022] Open
Abstract
Limb-girdle muscular dystrophies (LGMD) are hereditary genetic disorders characterized by progressive muscle impairment which predominantly include proximal muscle weaknesses in the pelvic and shoulder girdles. This article describes an attempt to identify genetic cause(s) for a LGMD pedigree via a combination of whole exome sequencing and Sanger sequencing. Digenic variants, the titin gene (TTN) c.19481T>G (p.Leu6494Arg) and the trafficking protein particle complex 11 gene (TRAPPC11) c.3092C>G (p.Pro1031Arg), co-segregated with the disease phenotype in the family, suggesting their possible pathogenicity.
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Affiliation(s)
- Qian Chen
- Center for Experimental Medicine, The Third Xiangya Hospital, Central South University, Changsha, China.,Department of Pathology, The Third Xiangya Hospital, Central South University, Changsha, China
| | - Wen Zheng
- Department of Neurology, The Third Xiangya Hospital, Central South University, Changsha, China
| | - Hongbo Xu
- Center for Experimental Medicine, The Third Xiangya Hospital, Central South University, Changsha, China
| | - Yan Yang
- Department of Neurology, The Third Xiangya Hospital, Central South University, Changsha, China
| | - Zhi Song
- Department of Neurology, The Third Xiangya Hospital, Central South University, Changsha, China
| | - Lamei Yuan
- Center for Experimental Medicine, The Third Xiangya Hospital, Central South University, Changsha, China.,Disease Genome Research Center, Central South University, Changsha, China
| | - Hao Deng
- Center for Experimental Medicine, The Third Xiangya Hospital, Central South University, Changsha, China.,Department of Neurology, The Third Xiangya Hospital, Central South University, Changsha, China.,Disease Genome Research Center, Central South University, Changsha, China
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16
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Bawa S, Gameros S, Baumann K, Brooks DS, Kollhoff JA, Zolkiewski M, Re Cecconi AD, Panini N, Russo M, Piccirillo R, Johnson DK, Kashipathy MM, Battaile KP, Lovell S, Bouyain SEA, Kawakami J, Geisbrecht ER. Costameric integrin and sarcoglycan protein levels are altered in a Drosophila model for Limb-girdle muscular dystrophy type 2H. Mol Biol Cell 2020; 32:260-273. [PMID: 33296226 PMCID: PMC8098830 DOI: 10.1091/mbc.e20-07-0453] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Mutations in two different domains of the ubiquitously expressed TRIM32 protein give rise to two clinically separate diseases, one of which is Limb-girdle muscular dystrophy type 2H (LGMD2H). Uncovering the muscle-specific role of TRIM32 in LGMD2H pathogenesis has proven difficult, as neurogenic phenotypes, independent of LGMD2H pathology, are present in TRIM32 KO mice. We previously established a platform to study LGMD2H pathogenesis using Drosophila melanogaster as a model. Here we show that LGMD2H disease-causing mutations in the NHL domain are molecularly and structurally conserved between fly and human TRIM32. Furthermore, transgenic expression of a subset of myopathic alleles (R394H, D487N, and 520fs) induce myofibril abnormalities, altered nuclear morphology, and reduced TRIM32 protein levels, mimicking phenotypes in patients afflicted with LGMD2H. Intriguingly, we also report for the first time that the protein levels of βPS integrin and sarcoglycan δ, both core components of costameres, are elevated in TRIM32 disease-causing alleles. Similarly, murine myoblasts overexpressing a catalytically inactive TRIM32 mutant aberrantly accumulate α- and β-dystroglycan and α-sarcoglycan. We speculate that the stoichiometric loss of costamere components disrupts costamere complexes to promote muscle degeneration.
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Affiliation(s)
- Simranjot Bawa
- Department of Biochemistry and Molecular Biophysics, Kansas State University, Manhattan, KS 66506
| | - Samantha Gameros
- Department of Biochemistry and Molecular Biophysics, Kansas State University, Manhattan, KS 66506
| | - Kenny Baumann
- School of Biological Sciences, University of Missouri-Kansas City, MO 64110
| | - David S Brooks
- Department of Biochemistry and Molecular Biophysics, Kansas State University, Manhattan, KS 66506
| | - Joseph A Kollhoff
- Department of Biochemistry and Molecular Biophysics, Kansas State University, Manhattan, KS 66506
| | - Michal Zolkiewski
- Department of Biochemistry and Molecular Biophysics, Kansas State University, Manhattan, KS 66506
| | | | - Nicolò Panini
- Department of Oncology, Istituto di Ricerche Farmacologiche Mario Negri IRCCS, 20156 Milan, Italy
| | - Massimo Russo
- Department of Oncology, Istituto di Ricerche Farmacologiche Mario Negri IRCCS, 20156 Milan, Italy
| | | | - David K Johnson
- Molecular Graphics and Modeling Laboratory, Computational Chemical Biology Core, University of Kansas, Lawrence, KS 66047
| | | | | | - Scott Lovell
- Protein Structure Laboratory, University of Kansas, Lawrence, KS 66047
| | - Samuel E A Bouyain
- School of Biological Sciences, University of Missouri-Kansas City, MO 64110
| | - Jessica Kawakami
- School of Biological Sciences, University of Missouri-Kansas City, MO 64110
| | - Erika R Geisbrecht
- Department of Biochemistry and Molecular Biophysics, Kansas State University, Manhattan, KS 66506.,School of Biological Sciences, University of Missouri-Kansas City, MO 64110
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17
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Chakravorty S, Nallamilli BRR, Khadilkar SV, Singla MB, Bhutada A, Dastur R, Gaitonde PS, Rufibach LE, Gloster L, Hegde M. Clinical and Genomic Evaluation of 207 Genetic Myopathies in the Indian Subcontinent. Front Neurol 2020; 11:559327. [PMID: 33250842 PMCID: PMC7674836 DOI: 10.3389/fneur.2020.559327] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2020] [Accepted: 09/23/2020] [Indexed: 12/13/2022] Open
Abstract
Objective: Inherited myopathies comprise more than 200 different individually rare disease-subtypes, but when combined together they have a high prevalence of 1 in 6,000 individuals across the world. Our goal was to determine for the first time the clinical- and gene-variant spectrum of genetic myopathies in a substantial cohort study of the Indian subcontinent. Methods: In this cohort study, we performed the first large clinical exome sequencing (ES) study with phenotype correlation on 207 clinically well-characterized inherited myopathy-suspected patients from the Indian subcontinent with diverse ethnicities. Results: Clinical-correlation driven definitive molecular diagnosis was established in 49% (101 cases; 95% CI, 42–56%) of patients with the major contributing pathogenicity in either of three genes, GNE (28%; GNE-myopathy), DYSF (25%; Dysferlinopathy), and CAPN3 (19%; Calpainopathy). We identified 65 variant alleles comprising 37 unique variants in these three major genes. Seventy-eight percent of the DYSF patients were homozygous for the detected pathogenic variant, suggesting the need for carrier-testing for autosomal-recessive disorders like Dysferlinopathy that are common in India. We describe the observed clinical spectrum of myopathies including uncommon and rare subtypes in India: Sarcoglycanopathies (SGCA/B/D/G), Collagenopathy (COL6A1/2/3), Anoctaminopathy (ANO5), telethoninopathy (TCAP), Pompe-disease (GAA), Myoadenylate-deaminase-deficiency-myopathy (AMPD1), myotilinopathy (MYOT), laminopathy (LMNA), HSP40-proteinopathy (DNAJB6), Emery-Dreifuss-muscular-dystrophy (EMD), Filaminopathy (FLNC), TRIM32-proteinopathy (TRIM32), POMT1-proteinopathy (POMT1), and Merosin-deficiency-congenital-muscular-dystrophy-type-1 (LAMA2). Thirteen patients harbored pathogenic variants in >1 gene and had unusual clinical features suggesting a possible role of synergistic-heterozygosity/digenic-contribution to disease presentation and progression. Conclusions: Application of clinically correlated ES to myopathy diagnosis has improved our understanding of the clinical and genetic spectrum of different subtypes and their overlaps in Indian patients. This, in turn, will enhance the global gene-variant-disease databases by including data from developing countries/continents for more efficient clinically driven molecular diagnostics.
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Affiliation(s)
- Samya Chakravorty
- Emory University Department of Pediatrics, Atlanta, GA, United States.,Emory University Department of Human Genetics, Atlanta, GA, United States.,Division of Neurosciences, Children's Healthcare of Atlanta, Atlanta, GA, United States.,School of Biological Sciences, Georgia Institute of Technology, Atlanta, GA, United States
| | | | - Satish Vasant Khadilkar
- Department of Neurology, Bombay Hospital, Mumbai, India.,Department of Neurology, Sir J J Group of Hospitals, Grant Medical College, Mumbai, India.,Bombay Hospital Institute of Medical Sciences, Mumbai, India
| | - Madhu Bala Singla
- Department of Neurology, Bombay Hospital, Mumbai, India.,Department of Neurology, Sir J J Group of Hospitals, Grant Medical College, Mumbai, India.,Bombay Hospital Institute of Medical Sciences, Mumbai, India
| | | | - Rashna Dastur
- Centre for Advanced Molecular Diagnostics in Neuromuscular Disorders (CAMDND), Mumbai, India
| | - Pradnya Satish Gaitonde
- Centre for Advanced Molecular Diagnostics in Neuromuscular Disorders (CAMDND), Mumbai, India
| | | | - Logan Gloster
- Emory University Department of Pediatrics, Atlanta, GA, United States.,School of Biological Sciences, Georgia Institute of Technology, Atlanta, GA, United States
| | - Madhuri Hegde
- School of Biological Sciences, Georgia Institute of Technology, Atlanta, GA, United States.,PerkinElmer Genomics, Global Laboratory Services, Waltham, MA, United States
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18
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Al-Khalili Szigyarto C. Duchenne Muscular Dystrophy: recent advances in protein biomarkers and the clinical application. Expert Rev Proteomics 2020; 17:365-375. [PMID: 32713262 DOI: 10.1080/14789450.2020.1773806] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
INTRODUCTION Early biomarker discovery studies have praised the value of their emerging results, predicting an unprecedented impact on health care. Biomarkers are expected to provide tests with increased specificity and sensitivity compared to existing measures, improve the decision-making process, and accelerate the development of therapies. For rare disorders, like Duchenne Muscular Dystrophy (DMD) such biomarkers can assist the development of therapies, therefore also helping to find a cure for the disease. AREA COVERED State-of-the-art technologies have been used to identify blood biomarkers for DMD and efforts have been coordinated to develop and promote translation of biomarkers for clinical practice. Biomarker translation to clinical practice is however, adjoined by challenges related to the complexity of the disease, involving numerous biological processes, and the limited sample resources. This review highlights the current progress on the development of biomarkers, describing the proteomics technologies used, the most promising findings and the challenges encountered. EXPERT OPINION Strategies for effective use of samples combined with orthogonal proteomics methods for protein quantification are essential for translating biomarkers to the patient's bed side. Progress is achieved only if strong evidence is provided that the biomarker constitutes a reliable indicator of the patient's health status for a specific context of use.
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Affiliation(s)
- Cristina Al-Khalili Szigyarto
- Science for Life Laboratory, KTH - Royal Institute of Technology , Solna, Sweden.,School of Chemistry, Biotechnology and Health, KTH - Royal Institute of Technology , Stockholm, Sweden
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19
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Liang WC, Jong YJ, Wang CH, Wang CH, Tian X, Chen WZ, Kan TM, Minami N, Nishino I, Wong LJC. Clinical, pathological, imaging, and genetic characterization in a Taiwanese cohort with limb-girdle muscular dystrophy. Orphanet J Rare Dis 2020; 15:160. [PMID: 32576226 PMCID: PMC7310488 DOI: 10.1186/s13023-020-01445-1] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2020] [Accepted: 06/16/2020] [Indexed: 12/14/2022] Open
Abstract
Background Limb-girdle muscular dystrophy (LGMD) is a genetically heterogeneous, hereditary disease characterized by limb-girdle weakness and histologically dystrophic changes. The prevalence of each subtype of LGMD varies among different ethnic populations. This study for the first time analyzed the phenotypes and genotypes in Taiwanese patients with LGMD in a referral center for neuromuscular diseases (NMDs). Results We enrolled 102 patients clinically suspected of having LGMD who underwent muscle biopsy with subsequent genetic analysis in the previous 10 years. On the basis of different pathological categories, we performed sequencing of target genes or panel for NMDs and then identified patients with type 1B, 1E, 2A, 2B, 2D, 2I, 2G, 2 N, and 2Q. The 1B patients with LMNA mutation presented with mild limb-girdle weakness but no conduction defect at the time. All 1E patients with DES mutation exhibited predominantly proximal weakness along with distal weakness. In our cohort, 2B and 2I were the most frequent forms of LGMD; several common or founder mutations were identified, including c.1097_1099delACA (p.Asn366del) in DES, homozygous c.101G > T (p.Arg34Leu) in SGCA, homozygous c.26_33dup (p.Glu12Argfs*20) in TCAP, c.545A > G (p.Tyr182Cys), and c.948delC (p.Cys317Alafs*111) in FKRP. Clinically, the prevalence of dilated cardiomyopathy in our patients with LGMD2I aged > 18 years was 100%, much higher than that in European cohorts. The only patient with LGMD2Q with PLEC mutation did not exhibit skin lesions or gastrointestinal abnormalities but had mild facial weakness. Muscle imaging of LGMD1E and 2G revealed a more uniform involvement than did other LGMD types. Conclusion Our study revealed that detailed clinical manifestation together with muscle pathology and imaging remain critical in guiding further molecular analyses and are crucial for establishing genotype–phenotype correlations. We also determined the common mutations and prevalence for different subtypes of LGMD in our cohort, which could be useful when providing specific care and personalized therapy to patients with LGMD.
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Affiliation(s)
- Wen-Chen Liang
- Department of Pediatrics, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan.,Translational Research Center of Neuromuscular Diseases, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan.,Department of Pediatrics, School of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Yuh-Jyh Jong
- Department of Pediatrics, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan. .,Translational Research Center of Neuromuscular Diseases, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan. .,Department of Laboratory Medicine, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan. .,Graduate Institute of Clinical Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan.
| | - Chien-Hua Wang
- Department of Pediatrics, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Chen-Hua Wang
- Department of Pediatrics, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Xia Tian
- Baylor Genetics, Houston, TX, USA.,Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA
| | - Wan-Zi Chen
- Department of Pathology, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Tzu-Min Kan
- Department of Pediatrics, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Narihiro Minami
- Department of Laboratory Medicine, National Center Hospital, National Center of Neurology and Psychiatry, Tokyo, Japan.,Department of Neuromuscular Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo, Japan.,Department of Genome Medicine Development, Medical Genome 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.,Department of Genome Medicine Development, Medical Genome Center, National Center of Neurology and Psychiatry, Tokyo, Japan
| | - Lee-Jun C Wong
- Baylor Genetics, Houston, TX, USA.,Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA
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20
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Srivastava P, Malhotra KP, Husain N, Malhotra HS, Kulshreshtha D, Anand A. Diagnosing Muscular Dystrophies: Comparison of Techniques and Their Cost Effectiveness: A Multi-institutional Study. J Neurosci Rural Pract 2020; 11:420-429. [PMID: 32753807 PMCID: PMC7394627 DOI: 10.1055/s-0040-1713301] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Background
The diagnosis of muscular dystrophies involves clinical discretion substantiated by dystrophic changes on muscle biopsy. The different subtypes of muscular dystrophy can be diagnosed using techniques to identify the loss of protein or molecular alterations.
Materials and Methods
Clinically suspicious cases confirmed to have muscular dystrophy on muscle biopsy seen at two tertiary care centers in North India were enrolled for the study. Immunohistochemistry (IHC) for dystrophin, merosin, sarcoglycan, emerin, and dysferlin proteins was performed. The spectrum of muscular dystrophies diagnosed was analyzed. Cost of diagnosing the cases using IHC was estimated and compared with that of standard molecular tests available for the diagnosis of muscular dystrophies.
Statistics
Descriptive statistics were used for data analysis. Mean and standard deviations were used for continuous variables, whereas categorical variables were analyzed using frequency percentage.
Results
A total of 47 cases of muscular dystrophies were studied. This included nine cases of Duchenne, three cases of Becker’s dystrophy, and one dystrophinopathy carrier. One case of α, seven cases of β, and two cases of δ sarcoglycanopathy, along with two cases of facioscapulohumeral dystrophy and a single case of dysferlinopathy were detected. Genetic studies were required for a subset of 16 cases. The cost of using muscle biopsy and IHC was substantially lower than that of molecular methods for the identification of muscular dystrophy subtypes.
Conclusion
We detailed an algorithmic approach for diagnosing muscular dystrophies using muscle biopsy. The prevalence of biopsy proven muscular dystrophies from two tertiary care centers in North India is compared with that from other centers. Genetic studies are currently of limited availability in India and are more expensive as compared with biopsy and IHC. Using these methodologies sequentially with a “biopsy first approach” may be the prudent approach for low-income countries.
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Affiliation(s)
- Pallavi Srivastava
- Department of Pathology, Dr. Ram Manohar Lohia Institute of Medical Sciences, Lucknow, Uttar Pradesh, India
| | - Kiran Preet Malhotra
- Department of Pathology, Dr. Ram Manohar Lohia Institute of Medical Sciences, Lucknow, Uttar Pradesh, India
| | - Nuzhat Husain
- Department of Pathology, Dr. Ram Manohar Lohia Institute of Medical Sciences, Lucknow, Uttar Pradesh, India
| | | | - Dinkar Kulshreshtha
- Department of Neurology, Dr. Ram Manohar Lohia Institute of Medical Sciences, Lucknow, Uttar Pradesh, India
| | - Akanksha Anand
- Department of Pathology, Dr. Ram Manohar Lohia Institute of Medical Sciences, Lucknow, Uttar Pradesh, India
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21
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Taheri F, Taghizadeh E, Pour MJR, Rostami D, Renani PG, Rastgar-Moghadam A, Hayat SMG. Limb-girdle Muscular Dystrophy and Therapy: Insights into Cell and Gene-based Approaches. Curr Gene Ther 2020; 19:386-394. [PMID: 32067617 DOI: 10.2174/1566523220666200218113526] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2019] [Revised: 01/11/2020] [Accepted: 02/04/2020] [Indexed: 12/17/2022]
Abstract
The Limb-Girdle Muscular Dystrophies (LGMD) are genetically heterogeneous disorders, responsible for muscle wasting and severe form of dystrophies. Despite the critical developments in the insight and information of pathomechanisms of limb-girdle muscular dystrophy, any definitive treatments do not exist, and current strategies are only based on the improvement of the signs of disorder and to enhance the life quality without resolving an underlying cause. There is a crucial relationship between pharmacological therapy and different consequences; therefore, other treatment strategies will be required. New approaches, such as gene replacement, gene transfer, exon skipping, siRNA knockdown, and anti-myostatin therapy, which can target specific cellular or molecular mechanism of LGMD, could be a promising avenue for the treatment. Recently, genome engineering strategies with a focus on molecular tools such as CRISPR-Cas9 are used to different types of neuromuscular disorders and show the highest potential for clinical translation of these therapies. Thus, recent advancements and challenges in the field will be reviewed in this paper.
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Affiliation(s)
- Forough Taheri
- Shahrekord Branch, Islamic Azad University, Shahrekord, Iran
| | - Eskandar Taghizadeh
- Cellular and Molecular Research Center, Yasuj University of Medical Sciences, Yasuj, Iran.,Department of Medical Genetics, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Mohammad J R Pour
- Department of Biology, Faculty of Sciences, Mashhad-Branch, Islamic Azad University, Mashhad, Iran
| | - Daryoush Rostami
- Department of School Allied, Zabol University of Medical Sciences, Zabol, Iran
| | - Pedram G Renani
- Shahrekord Branch, Islamic Azad University, Shahrekord, Iran
| | - Azam Rastgar-Moghadam
- Department of Genetics, Tehran Medical Sciences Branch, Islamic Azad University, Tehran, Iran
| | - Seyed M G Hayat
- Department of Medical Genetics, School of Medicine, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
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22
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Bevilacqua JA, Guecaimburu Ehuletche MDR, Perna A, Dubrovsky A, Franca MC, Vargas S, Hegde M, Claeys KG, Straub V, Daba N, Faria R, Periquet M, Sparks S, Thibault N, Araujo R. The Latin American experience with a next generation sequencing genetic panel for recessive limb-girdle muscular weakness and Pompe disease. Orphanet J Rare Dis 2020; 15:11. [PMID: 31931849 PMCID: PMC6958675 DOI: 10.1186/s13023-019-1291-2] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2019] [Accepted: 12/27/2019] [Indexed: 02/08/2023] Open
Abstract
Background Limb-girdle muscular dystrophy (LGMD) is a group of neuromuscular disorders of heterogeneous genetic etiology with more than 30 directly related genes. LGMD is characterized by progressive muscle weakness involving the shoulder and pelvic girdles. An important differential diagnosis among patients presenting with proximal muscle weakness (PMW) is late-onset Pompe disease (LOPD), a rare neuromuscular glycogen storage disorder, which often presents with early respiratory insufficiency in addition to PMW. Patients with PMW, with or without respiratory symptoms, were included in this study of Latin American patients to evaluate the profile of variants for the included genes related to LGMD recessive (R) and LOPD and the frequency of variants in each gene among this patient population. Results Over 20 institutions across Latin America (Brazil, Argentina, Peru, Ecuador, Mexico, and Chile) enrolled 2103 individuals during 2016 and 2017. Nine autosomal recessive LGMDs and Pompe disease were investigated in a 10-gene panel (ANO5, CAPN3, DYSF, FKRP, GAA, SGCA, SGCB, SGCD, SGCG, TCAP) based on reported disease frequency in Latin America. Sequencing was performed with Illumina’s NextSeq500 and variants were classified according to ACMG guidelines; pathogenic and likely pathogenic were treated as one category (P) and variants of unknown significance (VUS) are described. Genetic variants were identified in 55.8% of patients, with 16% receiving a definitive molecular diagnosis; 39.8% had VUS. Nine patients were identified with Pompe disease. Conclusions The results demonstrate the effectiveness of this targeted genetic panel and the importance of including Pompe disease in the differential diagnosis for patients presenting with PMW.
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Affiliation(s)
- Jorge A Bevilacqua
- Departamento de Neurología y Neurocirugía, Hospital Clínico, Universidad de Chile, Santiago, Chile.,Departamento de Anatomía y Medicina Legal, Facultad de Medicina, Universidad de Chile, Santiago, Chile.,Departamento de Neurología y Neurocirugía, Clínica Dávila, Santiago, Chile
| | | | - Abayuba Perna
- Institute of Neurology, Hospital de Clínicas, School of Medicine, UDELAR, Montevideo, Uruguay
| | - Alberto Dubrovsky
- Institute of Neuroscience, Favaloro Foundation, Buenos Aires, Argentina
| | - Marcondes C Franca
- Department of Neurology, University of Campinas-UNICAMP, Campinas, Sao Paulo, Brazil
| | - Steven Vargas
- Center of Neurology and Neurosurgery, Mexico City, Mexico
| | - Madhuri Hegde
- Global Laboratory Services, Diagnostics, PerkinElmer, Waltham, MA, USA
| | - Kristl G Claeys
- Department of Neurology, University Hospitals Leuven, Leuven, Belgium.,Laboratory for Muscle Diseases and Neuropathies, Department of Neurosciences, KU Leuven, Campus Gasthuisberg, Leuven, Belgium
| | - Volker Straub
- John Walton Muscular Dystrophy Research Centre, Institute of Genetic Medicine, Newcastle University, Centre for Life, Newcastle, United Kingdom
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23
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Bulakh MV, Galeeva NM, Polyakova DA, Ryzhkova OP, Dadali EL, Polyakov AV. Molecular and Genetic Study of Limb-Girdle Muscular Dystrophy 2D in Patient Cohorts with Various Forms of Progressive Muscular Dystrophies. RUSS J GENET+ 2019. [DOI: 10.1134/s1022795419020030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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24
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Taghizadeh E, Rezaee M, Barreto GE, Sahebkar A. Prevalence, pathological mechanisms, and genetic basis of limb-girdle muscular dystrophies: A review. J Cell Physiol 2018; 234:7874-7884. [PMID: 30536378 DOI: 10.1002/jcp.27907] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2018] [Accepted: 10/23/2018] [Indexed: 12/17/2022]
Abstract
Limb-girdle muscular dystrophies (LGMDs) are a highly heterogeneous group of neuromuscular disorders that are associated with weakness and wasting of muscles in legs and arms. Signs and symptoms may begin at any age and usually worsen by time. LGMDs are autosomal disorders with different types and their prevalence is not the same in different areas. New technologies such as next-generation sequencing can accelerate their diagnosis. Several important pathological mechanisms that are involved in the pathology of the LGMD include abnormalities in dystrophin-glycoprotein complex, the sarcomere, glycosylation of dystroglycan, vesicle and molecular trafficking, signal transduction pathways, and nuclear functions. Here, we provide a comprehensive review that integrates LGMD clinical manifestations, prevalence, and some pathological mechanisms involved in LGMDs.
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Affiliation(s)
- Eskandar Taghizadeh
- Cellular and Molecular Research Center, Yasuj University of Medical Sciences, Yasuj, Iran.,Department of Medical Genetics, Faculity of Medicine, Mashhad University of Medical Science, Mashhad, Iran
| | - Mehdi Rezaee
- Department of Medical Biotechnology, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - George E Barreto
- Departamento de Nutrición y Bioquímica, Facultad de Ciencias, Pontificia Universidad Javeriana, Bogotá D.C, Colombia.,Instituto de Ciencias Biomédicas, Universidad Autónoma de Chile, Santiago, Chile
| | - Amirhossein Sahebkar
- Biotechnology Research Center, Pharmaceutical Technology Institute, Mashhad University of Medical Science, Mashhad, Iran.,Neurogenic Inflammation Research Center, Mashhad University of Medical Science, Mashhad, Iran.,School of Pharmacy, Mashhad University of Medical Science, Mashhad, Iran
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25
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Nallamilli BRR, Chakravorty S, Kesari A, Tanner A, Ankala A, Schneider T, da Silva C, Beadling R, Alexander JJ, Askree SH, Whitt Z, Bean L, Collins C, Khadilkar S, Gaitonde P, Dastur R, Wicklund M, Mozaffar T, Harms M, Rufibach L, Mittal P, Hegde M. Genetic landscape and novel disease mechanisms from a large LGMD cohort of 4656 patients. Ann Clin Transl Neurol 2018; 5:1574-1587. [PMID: 30564623 PMCID: PMC6292381 DOI: 10.1002/acn3.649] [Citation(s) in RCA: 114] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2018] [Accepted: 08/28/2018] [Indexed: 12/16/2022] Open
Abstract
Objective Limb‐girdle muscular dystrophies (LGMDs), one of the most heterogeneous neuromuscular disorders (NMDs), involves predominantly proximal‐muscle weakness with >30 genes associated with different subtypes. The clinical‐genetic overlap among subtypes and with other NMDs complicate disease‐subtype identification lengthening diagnostic process, increases overall costs hindering treatment/clinical‐trial recruitment. Currently seven LGMD clinical trials are active but still no gene‐therapy‐related treatment is available. Till‐date no nation‐wide large‐scale LGMD sequencing program was performed. Our objectives were to understand LGMD genetic basis, different subtypes’ relative prevalence across US and investigate underlying disease mechanisms. Methods A total of 4656 patients with clinically suspected‐LGMD across US were recruited to conduct next‐generation sequencing (NGS)‐based gene‐panel testing during June‐2015 to June‐2017 in CLIA‐CAP‐certified Emory‐Genetics‐Laboratory. Thirty‐five LGMD‐subtypes‐associated or LGMD‐like other NMD‐associated genes were investigated. Main outcomes were diagnostic yield, gene‐variant spectrum, and LGMD subtypes’ prevalence in a large US LGMD‐suspected population. Results Molecular diagnosis was established in 27% (1259 cases; 95% CI, 26–29%) of the patients with major contributing genes to LGMD phenotypes being: CAPN3(17%), DYSF(16%), FKRP(9%) and ANO5(7%). We observed an increased prevalence of genetically confirmed late‐onset Pompe disease, DNAJB6‐associated LGMD subtype1E and CAPN3‐associated autosomal‐dominant LGMDs. Interestingly, we identified a high prevalence of patients with pathogenic variants in more than one LGMD gene suggesting possible synergistic heterozygosity/digenic/multigenic contribution to disease presentation/progression that needs consideration as a part of diagnostic modality. Interpretation Overall, this study has improved our understanding of the relative prevalence of different LGMD subtypes, their respective genetic etiology, and the changing paradigm of their inheritance modes and novel mechanisms that will allow for improved timely treatment, management, and enrolment of molecularly diagnosed individuals in clinical trials.
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Affiliation(s)
| | | | - Akanchha Kesari
- Emory University Department of Human Genetics Atlanta Georgia 30322.,EGL Genetics-Eurofins Tucker Atlanta Georgia 30084
| | - Alice Tanner
- Emory University Department of Human Genetics Atlanta Georgia 30322.,EGL Genetics-Eurofins Tucker Atlanta Georgia 30084
| | - Arunkanth Ankala
- Emory University Department of Human Genetics Atlanta Georgia 30322.,EGL Genetics-Eurofins Tucker Atlanta Georgia 30084
| | | | | | | | - John J Alexander
- Emory University Department of Human Genetics Atlanta Georgia 30322.,EGL Genetics-Eurofins Tucker Atlanta Georgia 30084
| | - Syed Hussain Askree
- Emory University Department of Human Genetics Atlanta Georgia 30322.,EGL Genetics-Eurofins Tucker Atlanta Georgia 30084
| | - Zachary Whitt
- Emory University Department of Human Genetics Atlanta Georgia 30322.,Augusta University Augusta Georgia 30912
| | - Lora Bean
- Emory University Department of Human Genetics Atlanta Georgia 30322.,EGL Genetics-Eurofins Tucker Atlanta Georgia 30084
| | - Christin Collins
- Emory University Department of Human Genetics Atlanta Georgia 30322
| | - Satish Khadilkar
- Department of Neurology Bombay Hospital Mumbai Maharashtra India.,Department of Neurology Sir J J Group of Hospitals Grant Medical College Mumbai Maharashtra India
| | - Pradnya Gaitonde
- Centre for Advanced Molecular Diagnostics in Neuromuscular Disorders (CAMDND) 400022 Mumbai India
| | - Rashna Dastur
- Centre for Advanced Molecular Diagnostics in Neuromuscular Disorders (CAMDND) 400022 Mumbai India
| | - Matthew Wicklund
- Neurology The University of Colorado at Denver - Anschutz Medical Campus Aurora Colorado 80045
| | - Tahseen Mozaffar
- Neurology University of California, Irvine Orange California 92868
| | - Matthew Harms
- Department of Neurology Columbia University New York New York 10032
| | | | | | - Madhuri Hegde
- Emory University Department of Human Genetics Atlanta Georgia 30322
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26
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Abstract
There has been an ever-expanding list of the Limb-Girdle Muscular Dystrophies (LGMD). There are currently 8 subtypes of autosomal dominant (AD) and 26 subtypes of autosomal recessive (AR) LGMD. Despite continued research efforts to conquer this group of genetic neuromuscular disease, patients continue to be treated symptomatically with the aim of prevention or addressing complications. Mouse models have been helpful in clarifying disease pathogenesis as well as strategizing pathways for treatment. Discoveries in translational research as well as molecular therapeutic approaches have kept clinicians optimistic that more promising clinical trials will lead the way to finding the cure for these devastating disorders. It is well known that the challenge for these rare diseases is the ability to assemble adequate numbers of patients for a clinically meaningful trial, but current efforts in developing patient registries have been encouraging. Natural history studies will be essential in establishing and interpreting the appropriate outcome measures for clinical trials. Nevertheless, animal studies continue to be key in providing proof of concept that will be necessary in moving research along. This review will briefly discuss each type of LGMD, highlighting their distinguishing features, then focus on research efforts that have been published in the literature for the past few years, many of which are still in the preclinical trial stage.
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Affiliation(s)
- Mary Lynn Chu
- Department of Neurology, New York University School of Medicine, New York, New York, 10016, USA.
- New York University Langone Orthopedic Hospital, 301 East 17th Street, New York, New York, 10003, USA.
| | - Ellen Moran
- Division of Clinical Genetics, Center for Children, Hassenfeld Children's Hospital at New York University Langone, New York University Langone Orthopedic Hospital, 301 East 17th Street, New York, New York, 10003, USA
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Barthélémy F, Defour A, Lévy N, Krahn M, Bartoli M. Muscle Cells Fix Breaches by Orchestrating a Membrane Repair Ballet. J Neuromuscul Dis 2018; 5:21-28. [PMID: 29480214 PMCID: PMC5836414 DOI: 10.3233/jnd-170251] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Skeletal muscle undergoes many micro-membrane lesions at physiological state. Based on their sizes and magnitude these lesions are repaired via different complexes on a specific spatio-temporal manner. One of the major repair complex is a dysferlin-dependent mechanism. Accordingly, mutations in the DYSF gene encoding dysferlin results in the development of several muscle pathologies called dysferlinopathies, where abnormalities of the membrane repair process have been characterized in patients and animal models. Recent efforts have been deployed to decipher the function of dysferlin, they shed light on its direct implication in sarcolemma resealing after injuries. These discoveries served as a strong ground to design therapeutic approaches for dysferlin-deficient patients. This review detailed the different partners and function of dysferlin and positions the sarcolemma repair in normal and pathological conditions.
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Affiliation(s)
- Florian Barthélémy
- Microbiology Immunology and Molecular Genetics, University of California, Los Angeles, CA, USA.,Center for Duchenne Muscular Dystrophy, University of California, Los Angeles, CA, USA
| | - Aurélia Defour
- Aix Marseille University, MMG, INSERM, Marseille, France
| | - Nicolas Lévy
- Aix Marseille University, MMG, INSERM, Marseille, France
| | - Martin Krahn
- Aix Marseille University, MMG, INSERM, Marseille, France
| | - Marc Bartoli
- Aix Marseille University, MMG, INSERM, Marseille, France
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28
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Peric M, Peric S, Stevanovic J, Milovanovic S, Basta I, Nikolic A, Kacar A, Rakocevic-Stojanovic V. Quality of life in adult patients with limb-girdle muscular dystrophies. Acta Neurol Belg 2018; 118:243-250. [PMID: 29116571 DOI: 10.1007/s13760-017-0857-9] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2017] [Accepted: 10/30/2017] [Indexed: 01/15/2023]
Abstract
Although limb-girdle muscular dystrophies (LGMD) can cause permanent disability, to date there are no studies that examined quality of life (QoL) in these patients. Our aim was to evaluate QoL in patients with LGMD, and to identify the most significant predictors of QoL. The study comprised 46 patients with diagnosis of limb-girdle muscular weakness. QoL in patients was evaluated using two scales-SF-36 questionnaire and the Individualized Neuromuscular Quality of Life questionnaire (INQoL). Following scales were also applied: Epworth Sleepiness Scale (ESS), Hamilton Scale for Depression (HamD), and Krupp's Fatigue Severity Scale (FSS). Mean SF-36 score was 52.4 ± 23.5, and physical composite score was worse than mental. Total INQoL score was 46.1 ± 20.4, with worst results obtained for weakness, fatigue and independence, while social relationships and emotions showed better results. Significant predictors of worse SF-36 score in LGMD patients were higher fatigue level (β = - 0.470, p < 0.01) and use of assistive device (β = - 0.245, p < 0.05). Significant predictors of worse INQoL score were higher fatigue level (β = 0.514, p < 0.01) and presence of cardiomyopathy (β = - 0.385, p < 0.01). It is of special interest that some of the identified factors that correlated with worse QoL in LGMD patients were amenable to treatment.
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Affiliation(s)
- Marina Peric
- Mother and Child Health Care Institute "Dr. Vukan Cupic", Radoja Dakica 6, 11000, Belgrade, Serbia
| | - Stojan Peric
- Neurology Clinic, Clinical Center of Serbia, School of Medicine, University of Belgrade, 6, Dr Subotica Street, 11000, Belgrade, Serbia
| | - Jelena Stevanovic
- Neurology Clinic, Clinical Center of Serbia, School of Medicine, University of Belgrade, 6, Dr Subotica Street, 11000, Belgrade, Serbia
| | - Sara Milovanovic
- Neurology Clinic, Clinical Center of Serbia, School of Medicine, University of Belgrade, 6, Dr Subotica Street, 11000, Belgrade, Serbia
| | - Ivana Basta
- Neurology Clinic, Clinical Center of Serbia, School of Medicine, University of Belgrade, 6, Dr Subotica Street, 11000, Belgrade, Serbia
| | - Ana Nikolic
- Neurology Clinic, Clinical Center of Serbia, School of Medicine, University of Belgrade, 6, Dr Subotica Street, 11000, Belgrade, Serbia
| | - Aleksandra Kacar
- Neurology Clinic, Clinical Center of Serbia, School of Medicine, University of Belgrade, 6, Dr Subotica Street, 11000, Belgrade, Serbia
| | - Vidosava Rakocevic-Stojanovic
- Neurology Clinic, Clinical Center of Serbia, School of Medicine, University of Belgrade, 6, Dr Subotica Street, 11000, Belgrade, Serbia.
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29
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Aho AC, Hultsjö S, Hjelm K. Perceptions of the transition from receiving the diagnosis recessive limb-girdle muscular dystrophy to becoming in need of human support and using a wheelchair: an interview study. Disabil Rehabil 2018; 41:2289-2298. [PMID: 29688081 DOI: 10.1080/09638288.2018.1464602] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Purpose: To describe perceptions of the transition from receiving the diagnosis recessive limb-girdle muscular dystrophy to becoming in need of human support to manage daily life and using a wheelchair for ambulation, from the affected young adults' and their parents' perspectives. Method: A qualitative and descriptive study design was used. Semi-structured interviews were held with 14 young adults diagnosed with recessive limb-girdle muscular dystrophy and 19 parents. Phenomenography was used for data analysis. Results: The diagnosis was described as being a shock and difficult to comprehend but also as a relief and a tool for information. Beginning to use a wheelchair was perceived to be mentally difficult but it also provided freedom. New ways of living involved physical, emotional, practical, and social difficulties as well as experiences of learning to adapt to the disease. The transition was overshadowed by concern about disease progression and influenced by facilitating factors, which were young adult being seen as a person; supportive family and friends; mobilized internal resources; meaningful daily activities; adapted environment; and professional support. Conclusions: The different perceptions expressed in this study highlight the importance of identifying personal perceptions and needs in order to optimize support provided by healthcare professionals. Implications for Rehabilitation The different perceptions described in this study emphasize the need for person-centered care for young adults living with recessive limb-girdle muscular dystrophy and their parents. Regular controls and professional support to cope with the disease and its consequences should be offered, not only at the time of diagnosis but also throughout disease progression. Beginning to use a wheelchair can be a psychologically distressing process, which has to be acknowledged by healthcare professionals when introducing it. Healthcare professionals should not only recognize the importance of having social relations and activities that are meaningful but also be a link to authorities in society and to interest organizations that can help to facilitate the person's management of the disease.
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Affiliation(s)
- Anna Carin Aho
- a Department of Health and Society , Malmö University , Malmö , Sweden
| | - Sally Hultsjö
- b Department of Medical and Health Sciences , Linköping University , Linköping , Sweden.,c Psychiatric Clinic , County Hospital Ryhov , Region Jönköping , Sweden
| | - Katarina Hjelm
- d Department of Public Health and Caring Sciences , Uppsala University , Uppsala , Sweden
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MARTINS ANAINÊS, MAARQUE CRISTIN, PINTO-BASTO JORGE, NEGRÃO LUIS. Bethlem myopathy in a Portuguese patient - case report. ACTA MYOLOGICA : MYOPATHIES AND CARDIOMYOPATHIES : OFFICIAL JOURNAL OF THE MEDITERRANEAN SOCIETY OF MYOLOGY 2017; 36:178-181. [PMID: 29774307 PMCID: PMC5953228] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Mutations of the encoding genes of collagen VI (COL6A1, COL6A2 and COL6A3), are responsible for two classical phenotypes (with a wide range of severity), the Ullrich congenital muscular dystrophy (UCMD) and the Bethlem myopathy (BM). We present a male patient of 49 years old, with symptoms of muscle weakness beginning in childhood and of very slowly progression. At the age of 42, the neurological examination revealed proximal lower limb muscle weakness and contractures of fingers flexors muscles, positive Gowers manoeuvre and a waddling gait. Serum creatine kinase (CK) values were slightly elevated, electromyographic study revealed myopathic changes and muscle MRI of the lower limbs showed a specific pattern of muscle involvement, with peripheral fat infiltration in vastus lateralis and intermedius and anterocentral infiltration in rectus femoris. Respiratory and cardiac functions were unremarkable. Whole exome sequencing identified the homozygous mutation c.1970-9G>A in COL6A2 gene.
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Affiliation(s)
- ANA INÊS MARTINS
- Neuromuscular Disease Unit, Neurology Department, Coimbra University and Hospital Center, Coimbra, Portugal
| | - CRISTIN MAARQUE
- Neuromuscular Disease Unit, Neurology Department, Coimbra University and Hospital Center, Coimbra, Portugal
| | - JORGE PINTO-BASTO
- Neuromuscular Disease Unit, Neurology Department, Coimbra University and Hospital Center, Coimbra, Portugal
| | - LUIS NEGRÃO
- Neuromuscular Disease Unit, Neurology Department, Coimbra University and Hospital Center, Coimbra, Portugal
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Alavi A, Esmaeili S, Nilipour Y, Nafissi S, Tonekaboni SH, Zamani G, Ashrafi MR, Kahrizi K, Najmabadi H, Jazayeri F. LGMD2E is the most common type of sarcoglycanopathies in the Iranian population. J Neurogenet 2017; 31:161-169. [DOI: 10.1080/01677063.2017.1346093] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Afagh Alavi
- Genetics Research Center, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran
| | - Sara Esmaeili
- Genetics Research Center, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran
| | - Yalda Nilipour
- Pediatric Pathology Research Center, Mofid Children Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Shahriar Nafissi
- Department of Neurology, Tehran University of Medical Sciences, Tehran, Iran
| | - Seyed Hasan Tonekaboni
- Pediatric Neurology Center of Excellence, Department of Pediatric Neurology, Mofid Children Hospital, Faculty of Medicine, Shahid Beheshti Medical university, Tehran, Iran
| | - Gholamreza Zamani
- Children's Medical Center, Tehran University of Medical Sciences, Iranian Epilepsy Association Board, Tehran, Iran
| | - Mahmoud Reza Ashrafi
- Pediatrics Center of Excellence, Children's Medical Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Kimia Kahrizi
- Genetics Research Center, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran
| | - Hossein Najmabadi
- Genetics Research Center, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran
| | - Fatemeh Jazayeri
- Department of Neurology, Tehran University of Medical Sciences, Tehran, Iran
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Pantoja-Melendez CA, Miranda-Duarte A, Roque-Ramirez B, Zenteno JC. Epidemiological and Molecular Characterization of a Mexican Population Isolate with High Prevalence of Limb-Girdle Muscular Dystrophy Type 2A Due to a Novel Calpain-3 Mutation. PLoS One 2017; 12:e0170280. [PMID: 28103310 PMCID: PMC5245889 DOI: 10.1371/journal.pone.0170280] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2016] [Accepted: 01/03/2017] [Indexed: 01/07/2023] Open
Abstract
Limb-Girdle Muscular Dystrophy type 2 (LGMD2) is a group of autosomally recessive inherited disorders defined by weakness and wasting of the shoulder and pelvic girdle muscles. In the past, several population isolates with high incidence of LGMD2 arising from founder mutation effects have been identified. The aim of this work is to describe the results of clinical, epidemiologic, and molecular studies performed in a Mexican village segregating numerous cases of LGMD2. A population census was conducted in the village to identify all LGMD affected patients. Molecular analysis included genome wide homozygosity mapping using a 250K SNP Affymetrix microarray followed by PCR amplification and direct nucleotide sequencing of the candidate gene. In addition, DNA from 401 randomly selected unaffected villagers was analyzed to establish the carrier frequency of the LGMD2 causal mutation. A total of 32 LGMD2 patients were identified in the village, rendering a disease prevalence of 4.3 (CI: 2.9–5.9) cases per 1,000 habitants (1 in 232). Genome wide homozygosity mapping revealed that affected individuals shared a 6.6 Mb region of homozygosity at chromosome 15q15. The identified homozygous interval contained CAPN3, the gene responsible for LGMD2 type A (LGMD2A). Direct sequencing of this gene revealed homozygosity for a novel c.348C>A mutation (p.Ala116Asp) in DNA from all 20 affected subjects available for genetic screening, except one which was heterozygous for the mutation. In such patient, a heterozygous c.2362AG>TCATCT deletion/insertion was recognized as the second CAPN3 mutation. Western blot and autocatalytic activity analyses in protein lysates from skeletal muscle biopsy obtained from a p.Ala116Asp homozygous patient suggested that this particular mutation increased the autocatalytic activity of CAPN3. Thirty eigth heterozygotes of the p.Ala116Asp mutation were identified among 401 genotyped unaffected villagers, yielding a population carrier frequency of 1 in 11. This study demonstrates that a cluster of patients with LGMD2A in a small Mexican village arises from a novel CAPN3 founder mutation. Evidence of allelic heterogeneity is demonstrated by the recognition of an additional CAPN3 mutation in a single affected. Our study provides an additional example of genetic isolation causing a high prevalence of LGMD and of successful molecular characterization of the disease by means of homozygosity mapping. The identification of a very high carrier frequency of the LGMD2-causing mutation has implications for more rational genetic counseling in this community.
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Affiliation(s)
- Carlos A. Pantoja-Melendez
- Department of Genetics-Research Unit, Institute of Ophthalmology “Conde de Valenciana”, Mexico City, Mexico
| | | | | | - Juan C. Zenteno
- Department of Genetics-Research Unit, Institute of Ophthalmology “Conde de Valenciana”, Mexico City, Mexico
- Department of Biochemistry, Faculty of Medicine, UNAM, Mexico City, Mexico
- * E-mail:
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Reddy HM, Hamed SA, Lek M, Mitsuhashi S, Estrella E, Jones MD, Mahoney LJ, Duncan AR, Cho KA, Macarthur DG, Kunkel LM, Kang PB. Homozygous nonsense mutation in SGCA is a common cause of limb-girdle muscular dystrophy in Assiut, Egypt. Muscle Nerve 2016; 54:690-5. [PMID: 26934379 DOI: 10.1002/mus.25094] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2015] [Revised: 02/22/2016] [Accepted: 02/26/2016] [Indexed: 01/18/2023]
Abstract
INTRODUCTION The genetic causes of limb-girdle muscular dystrophy (LGMD) have been studied in numerous countries, but such investigations have been limited in Egypt. METHODS A cohort of 30 families with suspected LGMD from Assiut, Egypt, was studied using immunohistochemistry, homozygosity mapping, Sanger sequencing, and whole exome sequencing. RESULTS Six families were confirmed to have pathogenic mutations, 4 in SGCA and 2 in DMD. Of these, 3 families harbored a single nonsense mutation in SGCA, suggesting that this may be a common mutation in Assiut, Egypt, originating from a founder effect. CONCLUSIONS The Assiut region in Egypt appears to share at least several of the common LGMD genes found in other parts of the world. It is notable that 4 of the 6 mutations were ascertained by means of whole exome sequencing, even though it was the last approach adopted. This illustrates the power of this technique for identifying causative mutations for muscular dystrophies. Muscle Nerve 54: 690-695, 2016.
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Affiliation(s)
- Hemakumar M Reddy
- Division of Pediatric Neurology, University of Florida College of Medicine, PO Box 100296, Gainesville, Florida, USA, 32610
| | - Sherifa A Hamed
- Department of Neurology and Psychiatry, Assiut University Hospital, Assiut, Egypt
| | - Monkol Lek
- Analytic and Translational Genetics Unit, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts, USA.,Broad Institute of the Massachusetts Institute of Technology and Harvard University, Cambridge, Massachusetts, USA
| | - Satomi Mitsuhashi
- Division of Genetics & Genomics, Boston Children's Hospital and Harvard Medical School, Boston, Massachusetts, USA
| | - Elicia Estrella
- Division of Genetics & Genomics, Boston Children's Hospital and Harvard Medical School, Boston, Massachusetts, USA
| | - Michael D Jones
- Division of Pediatric Neurology, University of Florida College of Medicine, PO Box 100296, Gainesville, Florida, USA, 32610
| | - Lane J Mahoney
- Division of Genetics & Genomics, Boston Children's Hospital and Harvard Medical School, Boston, Massachusetts, USA
| | - Anna R Duncan
- Division of Genetics & Genomics, Boston Children's Hospital and Harvard Medical School, Boston, Massachusetts, USA
| | - Kyung-Ah Cho
- Division of Pediatric Neurology, University of Florida College of Medicine, PO Box 100296, Gainesville, Florida, USA, 32610
| | - Daniel G Macarthur
- Analytic and Translational Genetics Unit, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts, USA.,Broad Institute of the Massachusetts Institute of Technology and Harvard University, Cambridge, Massachusetts, USA
| | - Louis M Kunkel
- Division of Genetics & Genomics, Boston Children's Hospital and Harvard Medical School, Boston, Massachusetts, USA
| | - Peter B Kang
- Division of Pediatric Neurology, University of Florida College of Medicine, PO Box 100296, Gainesville, Florida, USA, 32610. .,Department of Neurology and Department of Molecular Genetics and Microbiology, University of Florida College of Medicine, Gainesville, Florida, USA.
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Aho AC, Hultsjö S, Hjelm K. Health perceptions of young adults living with recessive limb-girdle muscular dystrophy. J Adv Nurs 2016; 72:1915-25. [DOI: 10.1111/jan.12962] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/14/2016] [Indexed: 12/27/2022]
Affiliation(s)
- Anna Carin Aho
- Department of Health and Caring Sciences; Linnaeus University; Växjö Sweden
| | - Sally Hultsjö
- Psychiatric Clinic; County Hospital; Ryhov; Jönköping Sweden
| | - Katarina Hjelm
- Department of Social and Welfare Studies; University of Linköping; Campus Norrköping Sweden
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Identification of a Novel Mutation in the Titin Gene in a Chinese Family with Limb-Girdle Muscular Dystrophy 2J. Mol Neurobiol 2015; 53:5097-102. [DOI: 10.1007/s12035-015-9439-0] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2015] [Accepted: 09/10/2015] [Indexed: 01/01/2023]
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Berry SE. Concise review: mesoangioblast and mesenchymal stem cell therapy for muscular dystrophy: progress, challenges, and future directions. Stem Cells Transl Med 2015; 4:91-8. [PMID: 25391645 PMCID: PMC4275006 DOI: 10.5966/sctm.2014-0060] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2014] [Accepted: 10/13/2014] [Indexed: 12/26/2022] Open
Abstract
Mesenchymal stem cells (MSCs) and mesoangioblasts (MABs) are multipotent cells that differentiate into specialized cells of mesodermal origin, including skeletal muscle cells. Because of their potential to differentiate into the skeletal muscle lineage, these multipotent cells have been tested for their capacity to participate in regeneration of damaged skeletal muscle in animal models of muscular dystrophy. MSCs and MABs infiltrate dystrophic muscle from the circulation, engraft into host fibers, and bring with them proteins that replace the functions of those missing or truncated. The potential for systemic delivery of these cells increases the feasibility of stem cell therapy for the large numbers of affected skeletal muscles in patients with muscular dystrophy. The present review focused on the results of preclinical studies with MSCs and MABs in animal models of muscular dystrophy. The goals of the present report were to (a) summarize recent results, (b) compare the efficacy of MSCs and MABs derived from different tissues in restoration of protein expression and/or improvement in muscle function, and (c) discuss future directions for translating these discoveries to the clinic. In addition, although systemic delivery of MABs and MSCs is of great importance for reaching dystrophic muscles, the potential concerns related to this method of stem cell transplantation are discussed.
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Affiliation(s)
- Suzanne E Berry
- Department of Comparative Biosciences, Institute for Genomic Biology, and Neuroscience Program, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA
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