المؤلفون: Haluk Topaloglu, Els De Vriendt, Argirios Dinopoulos, Esra Battaloglu, Kim Van Hoorenbeeck, Berten Ceulemans, Vincent Timmerman, Patrick Van Bogaert, Jonathan Baets, A. Pou-Serradell, Michaela Auer-Grumbach, Albena Jordanova, Yesim Parman, Peter Van den Bergh, Ricardo E. Madrid, Andrzej Kochański, Magdalena Zimoń, Dagmara Kabzińska, K. Peeters, Laetitia Yperzeele, Geoffrey P. Miller, Gian Maria Fabrizi, Günther Bernert, Birdal Bilir, Peter De Jonghe, Ronen Spiegel, Fernand Pauly, Satu-Leena Sallinen, Tine Deconinck

المساهمون: Çocuk Sağlığı ve Hastalıkları, UCL - SSS/IONS/NEUR - Clinical Neuroscience, UCL - (SLuc) Service de neurologie

المصدر: Brain, 134 (Pt 9
Brain
Brain : a journal of neurology, Vol. 134, no. 9, p. 2664-2676 (2011)

مصطلحات موضوعية: Génétique clinique, genotype-phenotype correlations, DNA Mutational Analysis, Disease, Charcot–Marie–Tooth disease, Dejerine-Sottas neuropathy, medicine.disease_cause, Bioinformatics, Cohort Studies, 0302 clinical medicine, Charcot-Marie-Tooth Disease, SH3TC2, Gene duplication, Age of Onset, Child, Genetics, 0303 health sciences, Mutation, early onset hereditary neuropathies, congenital hypomyelinating neuropathy, Dejerine–Sottas neuropathy, genotype–phenotype correlations, Middle Aged, Hypotonia, Phenotype, Child, Preschool, Hereditary Sensory and Motor Neuropathy -- genetics -- pathology -- physiopathology, medicine.symptom, Adult, Adolescent, Charcot-Marie-Tooth disease, 03 medical and health sciences, Young Adult, Neurologie, medicine, Humans, 030304 developmental biology, Aged, Genetic heterogeneity, business.industry, Infant, Original Articles, medicine.disease, Peripheral neuropathy, Charcot-Marie-Tooth Disease -- genetics -- pathology -- physiopathology, Neurology (clinical), Human medicine, Age of onset, business, Hereditary Sensory and Motor Neuropathy, 030217 neurology & neurosurgery

الوصف: Early onset hereditary motor and sensory neuropathies are rare disorders encompassing congenital hypomyelinating neuropathy with disease onset in the direct post-natal period and Dejerine-Sottas neuropathy starting in infancy. The clinical spectrum, however, reaches beyond the boundaries of these two historically defined disease entities. De novo dominant mutations in PMP22, MPZ and EGR2 are known to be a typical cause of very early onset hereditary neuropathies. In addition, mutations in several other dominant and recessive genes for Charcot-Marie-Tooth disease may lead to similar phenotypes. To estimate mutation frequencies and to gain detailed insights into the genetic and phenotypic heterogeneity of early onset hereditary neuropathies, we selected a heterogeneous cohort of 77 unrelated patients who presented with symptoms of peripheral neuropathy within the first year of life. The majority of these patients were isolated in their family. We performed systematic mutation screening by means of direct sequencing of the coding regions of 11 genes: MFN2, PMP22, MPZ, EGR2, GDAP1, NEFL, FGD4, MTMR2, PRX, SBF2 and SH3TC2. In addition, screening for the Charcot-Marie-Tooth type 1A duplication on chromosome 17p11.2-12 was performed. In 35 patients (45%), mutations were identified. Mutations in MPZ, PMP22 and EGR2 were found most frequently in patients presenting with early hypotonia and breathing difficulties. The recessive genes FGD4, PRX, MTMR2, SBF2, SH3TC2 and GDAP1 were mutated in patients presenting with early foot deformities and variable delay in motor milestones after an uneventful neonatal period. Several patients displaying congenital foot deformities but an otherwise normal early development carried the Charcot-Marie-Tooth type 1A duplication. This study clearly illustrates the genetic heterogeneity underlying hereditary neuropathies with infantile onset.
Journal Article
Research Support, Non-U.S. Gov't
SCOPUS: ar.j
info:eu-repo/semantics/published

وصف الملف: 2 full-text file(s): application/pdf; application/pdf; text/plain

الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a38300dcc0daaeeed746ea51631b2759Test
http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/108357Test

المؤلفون: Radim Mazanec, Nathalie Goemans, Albena Jordanova, H.-J. Christen, Christine Verellen, James R. Lupski, Jan De Bleecker, Paolo Vinci, Matthias Van Hul, Kristien Verhoeven, Rudy Van Coster, Els De Vriendt, Andrzej Kochański, Wim Robberecht, Jeffery M. Vance, Velina Guergueltcheva, Peter De Jonghe, Ian J. Butler, Gulam Mustafa Saifi, Peter Vieregge, Vedrana Milic Rasic, Filip Roelens, J. Michael Schröder, Eva Nelis, Chantal Ceuterick, Kristl Claeys, Pavel Seeman, Kinga Szigeti, Barbara Ryniewicz, Pedro Mancias, Stephan Züchner, Yoram Nevo, I. Tournev, Vincent Timmerman, María Teresa García Moreno, Michaela Auer-Grumbach, Joachim Weis, Peter Van den Bergh, Michael E. Shy

المصدر: Brain

مصطلحات موضوعية: Pathology, medicine.disease_cause, Severity of Illness Index, GTP Phosphohydrolases, 0302 clinical medicine, Degenerative disease, Charcot-Marie-Tooth Disease, Genotype, mitofusin 2, Age of Onset, Child, 0303 health sciences, Mutation, education.field_of_study, Middle Aged, Electrophysiology, medicine.anatomical_structure, Phenotype, Child, Preschool, Sensory nerve, Adult, medicine.medical_specialty, Adolescent, Population, Sural nerve, Biology, genotype-phenotype correlation, Mitochondrial Proteins, 03 medical and health sciences, Atrophy, atrophy, Sural Nerve, medicine, features, Humans, education, gene, 030304 developmental biology, Aged, Membrane Proteins, medicine.disease, charcot-marie-tooth type 2, mitofusin-2, Surgery, Microscopy, Electron, disease type-2, neuropathy, Neurology (clinical), Age of onset, 030217 neurology & neurosurgery

الوصف: Mutations in mitofusin 2 (MFN2) have been reported in Charcot–Marie–Tooth type 2 (CMT2) families. To study the distribution of mutations in MFN2 we screened 323 families and isolated patients with distinct CMT phenotypes. In 29 probands, we identified 22 distinct MFN2 mutations, and 14 of these mutations have not been reported before. All mutations were located in the cytoplasmic domains of the MFN2 protein. Patients presented with a classical but rather severe CMT phenotype, since 28% of them were wheelchair-dependent. Some had additional features as optic atrophy. Most patients had an early onset and severe disease status, whereas a smaller group experienced a later onset and milder disease course. Electrophysiological data showed in the majority of patients normal to slightly reduced nerve conduction velocities with often severely reduced amplitudes of the compound motor and sensory nerve action potentials. Examination of sural nerve specimens showed loss of large myelinated fibres and degenerative mitochondrial changes. In patients with a documented family history of CMT2 the frequency of MFN2 mutations was 33% indicating that MFN2 mutations are a major cause in this population. ispartof: Brain vol:129 issue:8 pages:2093-2102 ispartof: location:England status: published

وصف الملف: Print-Electronic; application/pdf

الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8fbd19685d12f10b9f298f3ffdd049b5Test
https://pubmed.ncbi.nlm.nih.gov/16714318Test