Navegando por Palavras-chave "Spastic ataxia"

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    New genetic causes for complex hereditary spastic paraplegia
    (Elsevier Science Bv, 2017) Sgobbi de Souza, Paulo Victor [UNIFESP]; Bortholin, Thiago [UNIFESP]; Dias, Renan Braido [UNIFESP]; Troccoli Chieia, Marco Antonio [UNIFESP]; Burlin, Stenio [UNIFESP]; Monteiro Naylor, Fernando George [UNIFESP]; Vieira de Rezende Pinto, Wladimir Bocca [UNIFESP]; Bulle Oliveira, Acary Souza [UNIFESP]
    Introduction: Hereditary Spastic Paraplegia (HSP) represents a complex and heterogeneous group of rare neurodegenerative disorders that share a common clinical feature of weakness and lower limb spasticity that can occur alone or in combination with a constellation of other neurological or systemic signs and symptoms. Although the core clinical feature of weakness and lower limb spasticity is virtually universal, the genetic heterogeneity is almost uncountable with more than 70 genetic forms described so far. We performed review of medical records from twenty-one patients from seventeen Brazilian families with complex phenotype of HSP. All cases have previously negative mutations in SPG11/KIAA1840 and SPG7 gene and were evaluated by whole-exome sequencing. An extensive description of systemic and neurological signs has been described. Results: Whole-exome sequencing was unremarkable in eight patients and established a definite genetic diagnosis in thirteen patients of twelve non-related families. Mutations were found in genes previously implicated in other neurodegenerative disorders such as Amyotrophic Lateral Sclerosis, Hereditary Neuropathy, Spastic Ataxias, Neurodegeneration with Brain Iron Accumulation, Glycogen Metabolism, Congenital Lipodystrophy and aminoacyl-tRNA synthetases disorders. Conclusions: We report thirteen new genetically-proven cases of complex HSP, expanding the clinical spectrum of presentations of HSP, providing new pathophysiological mechanisms and disclosing new potential therapeutic targets. (C) 2017 Elsevier B.V. All rights reserved.
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    Nonneurological Involvement in Late-Onset Friedreich Ataxia (LOFA): Exploring the Phenotypes
    (Springer, 2017) Martinez, Alberto R. M.; Moro, Adriana; Abrahao, Agessandro [UNIFESP]; Faber, Ingrid; Borges, Conrado R.; Rezende, Thiago J. R.; Martins, Carlos R., Jr.; Moscovich, Mariana; Munhoz, Renato P.; Segal, Sandra Leistner; Arruda, Walter O.; Saraiva-Pereira, Maria Luiza; Karuta, Simone; Pedroso, Jose Luiz [UNIFESP]; D'Abreu, Anelyssa; Jardim, Laura B.; Lopes-Cendes, Iscia; Barsottini, Orlando G. [UNIFESP]; Teive, Helio A. G.; Franca, Marcondes C., Jr.
    Friedreich's ataxia (FDRA) is the most common inherited ataxia worldwide, caused by homozygous GAA expansions in the FXN gene. Patients usually have early onset ataxia, areflexia, Babinski sign, scoliosis and pes cavus, but at least 25 % of cases have atypical phenotypes. Disease begins after the age of 25 in occasional patients (late-onset Friedreich ataxia (LOFA)). Little is known about the frequency and clinical profile of LOFA patients. One hundred six patients with molecular confirmation of FDRA and followed in three Brazilian outpatient centers were enrolled. General demographics, GAA expansion size, age at onset, cardiac, endocrine, and skeletal manifestations were evaluated and compared between LOFA and classic FDRA (cFDRA) groups. We used Mann-Whitney and Fisher tests to compare means and proportions between groups