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Nagappa M, Sharma S, Govindaraj P, Chickabasaviah YT, Siram R, Shroti A, Seshagiri DV, Debnath M, Sinha S, Bindu PS, Taly AB. Characterisation of Patients with SH3TC2 Associated Neuropathy in an Indian Cohort. Neurol India 2023; 71:940-945. [PMID: 37929431 DOI: 10.4103/0028-3886.388101] [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] [Indexed: 11/07/2023]
Abstract
Background SH3TC2 variations lead to demyelinating recessive Charcot-Marie-Tooth (CMT) disease, which is commonly associated with early-onset scoliosis and cranial neuropathy. Data from Indian ethnicity is limited. Objective We aim to report the characteristics of patients with SH3TC2-associated neuropathy from an Indian cohort. Patients and Methods Data of five unrelated subjects with SH3TC2 variations were analyzed. Results Clinical features included female predominance (n = 4), early-onset neuropathy (n = 2), pes cavus and hammer toes (n = 4), kyphoscoliosis (n = 1), impaired vision and hearing (n = 1), facial muscle weakness (n = 1), impaired kinaesthetic sense (n = 3), tremor (n = 2), and ataxia (n = 1). Four patients had the "CMT" phenotype, while one patient had Roussy-Levy syndrome. All had demyelinating electrophysiology with conduction velocities being "very slow" in one, "slow" in one, "mildly slow" in two, and "intermediate" in one patient. Brain stem auditory evoked potentials were universally abnormal though only one patient had symptomatic deafness. Seven variants were identified in SH3TC2 [homozygous = 3 (c.1412del, c.69del, c.3152G>A), heterozygous = 4 (c.1105C>T, c.3511C>T, c.2028G>C, c.254A>T)]. Except for c.3511C>T variant, the rest were novel. Three patients had additional variations in genes having pathobiological relevance in other CMTs or amyotrophic lateral sclerosis. Conclusion We provide data on a cohort of patients of Indian origin with SH3TC2 variations and highlight differences from other cohorts. Though the majority were not symptomatic for hearing impairment, evoked potentials disclosed abnormalities in all. Further studies are required to establish the functional consequences of novel variants and their interacting molecular partners identified in the present study to strengthen their association with the phenotype.
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Affiliation(s)
- Madhu Nagappa
- Department of Neurology; Department of Neuromuscular Laboratory, Neurobiology Research Centre (NBRC), National Institute of Mental Health and Neurosciences (NIMHANS), Bengaluru, Karnataka, India
| | - Shivani Sharma
- Department of Neurology; Department of Neuropathology; Department of Neuromuscular Laboratory, Neurobiology Research Centre (NBRC), National Institute of Mental Health and Neurosciences (NIMHANS), Bengaluru, Karnataka, India
| | | | - Yasha T Chickabasaviah
- Department of Neuropathology; Department of Neuromuscular Laboratory, Neurobiology Research Centre (NBRC), National Institute of Mental Health and Neurosciences (NIMHANS), Bengaluru, Karnataka, India
| | - Ramesh Siram
- Department of Neurology, Neurobiology Research Centre (NBRC), National Institute of Mental Health and Neurosciences (NIMHANS), Bengaluru, Karnataka, India
| | - Akhilesh Shroti
- Department of Neurology, Neurobiology Research Centre (NBRC), National Institute of Mental Health and Neurosciences (NIMHANS), Bengaluru, Karnataka, India
| | - Doniparthi V Seshagiri
- Department of Neurology, Neurobiology Research Centre (NBRC), National Institute of Mental Health and Neurosciences (NIMHANS), Bengaluru, Karnataka, India
| | - Monojit Debnath
- Department of Human Genetics, Neurobiology Research Centre (NBRC), National Institute of Mental Health and Neurosciences (NIMHANS), Bengaluru, Karnataka, India
| | - Sanjib Sinha
- Department of Neurology, Neurobiology Research Centre (NBRC), National Institute of Mental Health and Neurosciences (NIMHANS), Bengaluru, Karnataka, India
| | - Parayil S Bindu
- Department of Neurology; Department of Neuromuscular Laboratory, Neurobiology Research Centre (NBRC), National Institute of Mental Health and Neurosciences (NIMHANS), Bengaluru, Karnataka, India
| | - Arun B Taly
- Department of Neurology; Department of Neuromuscular Laboratory, Neurobiology Research Centre (NBRC), National Institute of Mental Health and Neurosciences (NIMHANS), Bengaluru, Karnataka, India
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A meta-analysis on the prevalence of Charcot-Marie-Tooth disease and related inherited peripheral neuropathies. J Neurol 2023; 270:2468-2482. [PMID: 36631678 DOI: 10.1007/s00415-023-11559-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2022] [Revised: 01/01/2023] [Accepted: 01/02/2023] [Indexed: 01/13/2023]
Abstract
BACKGROUND Charcot-Marie-Tooth disease and related inherited peripheral neuropathies (CMT&RIPNs) brings great suffering and heavy burden to patients, but its global prevalence rates have not been well described. METHODS We searched major English and Chinese databases for studies reporting the prevalence of CMT&RIPNs from the establishment of the databases to September 26, 2022. Based on the age, gender, study design, study region, and disease subtype, the included studies were correspondingly synthesized for meta-analyses on the overall prevalence and/or the subgroup analyses by using pool arcsine transformed proportions in the random-effects model. RESULTS Of the finally included 31 studies, 21 studied the whole age population and various types of CMT&RIPNs, and the others reported specific disease subtype(s) or adult or non-adult populations. The pooled prevalence was 17.69/100,000 (95% CI 12.32-24.33) for the whole age population and significantly higher for CMT1 [10.61/100,000 (95% CI 7.06-14.64)] than for other subtypes (P' < 0.001). Without statistical significance, the prevalence seemed higher in those aged ≥ 16 or 18 years (21.02/100,000) than in those aged < 16 years (16.13/100,000), in males (22.50/100,000) than in females (17.95/100,000), and in Northern Europe (30.97/100,000) than in other regions. CONCLUSION CMT&RIPNs are relatively more prevalent as CMT1 in the disease subtypes, and probably prevalent in older ages, males, and Northern Europe. More studies on the epidemiological characteristics of CMT&RIPNs with well-defined diagnosis criteria are needed to improve the prevalence evaluation and to arouse more attention to health care support.
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Duan X, Ma Y, Fan D, Liu X. Characteristics of Clinical and Electrophysiological Pattern in a Large Cohort of Chinese Patients With Charcot-Marie-Tooth 4C. Front Neurol 2021; 12:598168. [PMID: 33643188 PMCID: PMC7907161 DOI: 10.3389/fneur.2021.598168] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2020] [Accepted: 01/21/2021] [Indexed: 11/13/2022] Open
Abstract
The "Src homology 3 (SH3) domain and tetratricopeptide repeats 2" (SH3TC2) gene is mutated in individuals with Charcot-Marie-Tooth disease (CMT) and considered relevant to a demyelinating or intermediate subtype of CMT disease, CMT4C. In this study, we screened a cohort of 465 unrelated Chinese CMT patients alongside 650 controls. We used Sanger, next-generation, or whole-exome sequencing to analyze SH3TC2 and other CMT-related genes and identified 12 SH3TC2 variants (eight novel) in seven families. Of the eight novel variants, seven were likely pathogenic (c.280-2 A > G, c.732-1 G > A, c.1177+6 T > C, c.3328-1 G > A, G299S, R548W, L1048P), and 1 had uncertain significance (S221P). The CMT4C frequency was calculated to be 4.24% in demyelinating or intermediate CMT patients without PMP22 duplication. Additionally, we detected variant R954* in the Chinese cohort in our study, indicating that this variant may be present among Asians, albeit with a relatively low frequency. The onset age varied among the eight patients, three of whom presented scoliosis. We summarized phenotypes in the Chinese CMT cohort and concluded that the absence of scoliosis, cranial nerve involvement, or late-onset symptoms does not necessarily preclude SH3TC2 involvement in a given case.
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Affiliation(s)
- Xiaohui Duan
- Department of Neurology, China-Japan Friendship Hospital, Beijing, China
| | - Yan Ma
- Department of Neurology, Peking University Third Hospital, Beijing, China
| | - Dongsheng Fan
- Department of Neurology, Peking University Third Hospital, Beijing, China.,Key Laboratory for Neuroscience, Ministry of Education/National Health Commission, Peking University, Beijing, China
| | - Xiaoxuan Liu
- Department of Neurology, Peking University Third Hospital, Beijing, China
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Lerat J, Magdelaine C, Lunati A, Dzugan H, Dejoie C, Rego M, Beze Beyrie P, Bieth E, Calvas P, Cintas P, Delaubrier A, Demurger F, Gilbert-Dussardier B, Goizet C, Journel H, Laffargue F, Magy L, Taithe F, Toutain A, Urtizberea JA, Sturtz F, Lia AS. Implication of the SH3TC2 gene in Charcot-Marie-Tooth disease associated with deafness and/or scoliosis: Illustration with four new pathogenic variants. J Neurol Sci 2019; 406:116376. [PMID: 31634715 DOI: 10.1016/j.jns.2019.06.027] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2019] [Revised: 06/07/2019] [Accepted: 06/24/2019] [Indexed: 11/30/2022]
Abstract
The autosomal recessive demyelinating form of Charcot-Marie-Tooth can be due to SH3TC2 gene pathogenic variants (CMT4C, AR-CMTde-SH3TC2). We report on a series of 13 patients with AR-CMTde-SH3TC2 among a French cohort of 350 patients suffering from all type of inheritance peripheral neuropathy. The SH3TC2 gene appeared to be the most frequently mutated gene for demyelinating neuropathy in this series by NGS. Four new pathogenic variants have been identified: two nonsense variants (p.(Tyr970*), p.(Trp1199*)) and two missense variants (p.(Leu1126Pro), p.(Ala1206Asp)). The recurrent variant p.Arg954* was present in 62%, and seems to be a founder mutation. The phenotype is fairly homogeneous, as all these patients, except the youngest ones, presented scoliosis and/or hearing loss.
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Affiliation(s)
- J Lerat
- Service Oto-Rhino-Laryngologie, Centre Hospitalier Universitaire de Limoges, Limoges, France; EA6309, Université de Limoges, Limoges, France.
| | - C Magdelaine
- EA6309, Université de Limoges, Limoges, France; Service de Biochimie et Génétique Moléculaire, Centre Hospitalier Universitaire de Limoges, Limoges, France
| | - A Lunati
- EA6309, Université de Limoges, Limoges, France; Service de Biochimie et Génétique Moléculaire, Centre Hospitalier Universitaire de Limoges, Limoges, France
| | - H Dzugan
- EA6309, Université de Limoges, Limoges, France; Service de Biochimie et Génétique Moléculaire, Centre Hospitalier Universitaire de Limoges, Limoges, France
| | - C Dejoie
- Service de Biochimie et Génétique Moléculaire, Centre Hospitalier Universitaire de Limoges, Limoges, France
| | - M Rego
- Service de Biochimie et Génétique Moléculaire, Centre Hospitalier Universitaire de Limoges, Limoges, France
| | | | - E Bieth
- Service de Génétique Médicale, Centre Hospitalier Universitaire de Toulouse, Toulouse, France
| | - P Calvas
- Service de Génétique Médicale, Centre Hospitalier Universitaire de Toulouse, Toulouse, France
| | - P Cintas
- Service de Neurologie et d'explorations fonctionnelles, Centre Hospitalier Universitaire de Toulouse, Toulouse, France
| | - A Delaubrier
- Service de Médecine Physique et Rééducation, Centre Hospitalier Universitaire de Poitiers, Poitiers, France
| | - F Demurger
- Service de Génétique Médicale, Centre Hospitalier Bretagne Atlantique, Vannes, France
| | - B Gilbert-Dussardier
- Service de Génétique Médicale, Centre Hospitalier Universitaire de Poitiers, Poitiers, France; EA3808, Université de Poitiers, Poitiers, France
| | - C Goizet
- Service de Neurogénétique, Centre Hospitalier Universitaire de Bordeaux, Bordeaux, France
| | - H Journel
- Service de Génétique Médicale, Centre Hospitalier Bretagne Atlantique, Vannes, France
| | - F Laffargue
- Service de Génétique médicale, Centre Hospitalier Universitaire de Clermont-Ferrand, Limoges, France
| | - L Magy
- EA6309, Université de Limoges, Limoges, France; Service de Neurologie, Centre Hospitalier Universitaire de Limoges, Limoges, France
| | - F Taithe
- Service de Neurologie, Centre Hospitalier Universitaire de Clermont-Ferrand, Limoges, France
| | - A Toutain
- Service de Génétique, Centre Hospitalier Universitaire de Tours, Tours, France
| | - J A Urtizberea
- Centre de Compétence Neuromusculaire, APHP, Filnemus, Centre Hospitalier Hendaye, France
| | - F Sturtz
- EA6309, Université de Limoges, Limoges, France; Service de Biochimie et Génétique Moléculaire, Centre Hospitalier Universitaire de Limoges, Limoges, France
| | - A S Lia
- EA6309, Université de Limoges, Limoges, France; Service de Biochimie et Génétique Moléculaire, Centre Hospitalier Universitaire de Limoges, Limoges, France
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Kontogeorgiou Z, Nikolaou K, Kartanou C, Breza M, Panas M, Karadima G, Koutsis G. Mutational screening of the SH3TC2 gene in Greek patients with suspected demyelinating recessive Charcot-Marie-Tooth disease reveals a varied and unusual phenotypic spectrum. J Peripher Nerv Syst 2019; 24:125-130. [PMID: 30653784 DOI: 10.1111/jns.12305] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2018] [Revised: 01/10/2019] [Accepted: 01/12/2019] [Indexed: 01/18/2023]
Abstract
Charcot-Marie-Tooth disease type 4 C (CMT4C) is an autosomal recessive form of demyelinating peripheral neuropathy caused by mutations in SH3TC2, characterized by early onset, spine deformities, and cranial nerve involvement. We screened SH3TC2 in 50 unrelated Greek patients with suspected demyelinating Charcot-Marie-Tooth disease and pedigree compatible with recessive inheritance. All patients had been previously screened for PMP22, GJB1, and MPZ mutations. We found five previously identified pathogenic mutations in SH3TC2 distributed among 13 patients in homozygosity or compound heterozygosity (p. Arg954Stop, Arg1109Stop, Gln892Stop, Ala878Asp, and Arg648Trp). Although most cases had early onset and spine deformities were almost omnipresent, a wide phenotypic spectrum was observed. Particularly notable were two siblings with Roussy-Lévy syndrome and one patient with young-onset trigeminal neuralgia. In conclusion, mutations in SH3TC2 are responsible for 26% of Greek patients with suspected CMT4, identifying CMT4C as the most common recessive demyelinating neuropathy in the Greek population, in accordance with other Mediterranean cohorts.
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Affiliation(s)
- Zoi Kontogeorgiou
- Neurogenetics Unit, 1st Department of Neurology, Eginition Hospital, Medical School National and Kapodistrian University of Athens, Athens, Greece
| | - Katerina Nikolaou
- Neurogenetics Unit, 1st Department of Neurology, Eginition Hospital, Medical School National and Kapodistrian University of Athens, Athens, Greece
| | - Chrisoula Kartanou
- Neurogenetics Unit, 1st Department of Neurology, Eginition Hospital, Medical School National and Kapodistrian University of Athens, Athens, Greece
| | - Marianthi Breza
- Neurogenetics Unit, 1st Department of Neurology, Eginition Hospital, Medical School National and Kapodistrian University of Athens, Athens, Greece
| | - Marios Panas
- Neurogenetics Unit, 1st Department of Neurology, Eginition Hospital, Medical School National and Kapodistrian University of Athens, Athens, Greece
| | - Georgia Karadima
- Neurogenetics Unit, 1st Department of Neurology, Eginition Hospital, Medical School National and Kapodistrian University of Athens, Athens, Greece
| | - Georgios Koutsis
- Neurogenetics Unit, 1st Department of Neurology, Eginition Hospital, Medical School National and Kapodistrian University of Athens, Athens, Greece
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Cipriani S, Phan V, Médard JJ, Horvath R, Lochmüller H, Chrast R, Roos A, Spendiff S. Neuromuscular Junction Changes in a Mouse Model of Charcot-Marie-Tooth Disease Type 4C. Int J Mol Sci 2018; 19:ijms19124072. [PMID: 30562927 PMCID: PMC6320960 DOI: 10.3390/ijms19124072] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2018] [Revised: 12/06/2018] [Accepted: 12/14/2018] [Indexed: 01/08/2023] Open
Abstract
The neuromuscular junction (NMJ) appears to be a site of pathology in a number of peripheral nerve diseases. Charcot-Marie-Tooth (CMT) 4C is an autosomal recessive, early onset, demyelinating neuropathy. Numerous mutations in the SH3TC2 gene have been shown to underlie the condition often associated with scoliosis, foot deformities, and reduced nerve conduction velocities. Mice with exon 1 of the Sh3tc2 gene knocked out demonstrate many of the features seen in patients. To determine if NMJ pathology is contributory to the pathomechanisms of CMT4C we examined NMJs in the gastrocnemius muscle of SH3TC2-deficient mice. In addition, we performed proteomic assessment of the sciatic nerve to identify protein factors contributing to the NMJ alterations and the survival of demyelinated axons. Morphological and gene expression analysis of NMJs revealed a lack of continuity between the pre- and post-synaptic apparatus, increases in post-synaptic fragmentation and dispersal, and an increase in expression of the gamma subunit of the acetylcholine receptor. There were no changes in axonal width or the number of axonal inputs to the NMJ. Proteome investigations of the sciatic nerve revealed altered expression of extracellular matrix proteins important for NMJ integrity. Together these observations suggest that CMT4C pathology includes a compromised NMJ even in the absence of changes to the innervating axon.
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Affiliation(s)
- Silvia Cipriani
- John Walton Muscular Dystrophy Research Centre, Newcastle University, Newcastle upon Tyne NE1 3BZ, UK.
- INSPE-Institute of Experimental Neurology, San Raffaele Scientific Institute, 20132 Milan, Italy.
- Division of Neuroscience, San Raffaele Scientific Institute, 20132 Milan, Italy.
| | - Vietxuan Phan
- Leibniz-Institut für Analytische Wissenschaften -ISAS- e.V.; Otto-Hahn-Strasse 6b, 44227 Dortmund, Germany.
| | - Jean-Jacques Médard
- Department of Neuroscience, Karolinska Institutet, 171 65 Stockholm, Sweden.
- Department of Clinical Neuroscience, Karolinska Institutet, 171 65 Stockholm, Sweden.
| | - Rita Horvath
- Department of Clinical Neurosciences, University of Cambridge, John Van Geest Cambridge Centre for Brain Repair, Forvie, Robinson way, Cambridge Biomedical Campus, Cambridge CB2 0PY, UK.
| | - Hanns Lochmüller
- Department of Neuropediatrics and Muscle Disorders, Medical Center-University of Freiburg, Mathildenstrasse 1, 79106 Freiburg, Germany.
- Centro Nacional de Análisis Genómico, Center for Genomic Regulation, Barcelona Institute of Science and Technology, Baldri I reixac 4, 08028 Barcelona, Spain.
- Children's Hospital of Eastern Ontario Research Institute, University of Ottawa, Ottawa, ON K1H 8L1, Canada.
- Division of Neurology, Department of Medicine, The Ottawa Hospital, Riverside Drive, Ottawa, ON K1H 7X5, Canada.
| | - Roman Chrast
- Department of Neuroscience, Karolinska Institutet, 171 65 Stockholm, Sweden.
- Department of Clinical Neuroscience, Karolinska Institutet, 171 65 Stockholm, Sweden.
| | - Andreas Roos
- Leibniz-Institut für Analytische Wissenschaften -ISAS- e.V.; Otto-Hahn-Strasse 6b, 44227 Dortmund, Germany.
- Department of Neuropediatrics, Developmental Neurology and Social Pediatrics, Centre for Neuromuscular Disorders in Children, University Children's Hospital Essen, University of Duisburg-Essen, 45122 Essen, Germany.
| | - Sally Spendiff
- John Walton Muscular Dystrophy Research Centre, Newcastle University, Newcastle upon Tyne NE1 3BZ, UK.
- Children's Hospital of Eastern Ontario Research Institute, University of Ottawa, Ottawa, ON K1H 8L1, Canada.
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