5 documents found, page 1 of 1
Novel mag variant causes cerebellar ataxia with oculomotor apraxia: Molecular b...
Santos, M; Damásio, J; Kun-Rodrigues, C; Barbot, C; Sequeiros, J; Brás, J; Alonso, I; Guerreiro, RHomozygous variants in MAG, encoding myelin-associated glycoprotein (MAG), have been associated with complicated forms of hereditary spastic paraplegia (HSP). MAG is a glycoprotein member of the immunoglobulin superfamily, expressed by myelination cells. In this study, we identified a novel homozygous missense variant in MAG (c.124T>C; p.Cys42Arg) in a Portuguese family with early-onset autosomal recessive cere...
Rett Syndrome With and Without Detected MECP2 Mutations: an Attempt to Redefine...
Temudo, T; Santos, M; Ramos, E; Dias, K; Vieira, JP; Moreira, A; Calado, E; Carrilho, I; Oliveira, G; Levy, A; Barbot, C; Fonseca, M; Cabral, ABackground: The diagnosis of Rett syndrome (RTT) is based on a set of clinical criteria, irrespective of mutation status. The aims of this study were (1) to define the clinical differences existing between patients with Rett syndrome with (Group I) and without a MECP2 mutation (Group II), and (2) to characterize the phenotypes associated with the more common MECP2 mutations. Patients and Methods: We analyzed 87...
LAMA2 Gene Analysis in a Cohort of 26 Congenital Muscular Dystrophy Patients
Oliveira, J; Santos, R; Soares-Silva, I; Jorge, P; Vieira, E; Oliveira, ME; Moreira, A; Coelho, T; Ferreira, JC; Fonseca, MJ; Barbosa, C; Prats, JCongenital muscular dystrophy type 1A (MDC1A) is caused by mutations in the LAMA2 gene encoding laminin-alpha2. We describe the molecular study of 26 patients with clinical presentation, magnetic resonance imaging and/or laminin-alpha2 expression in muscle, compatible with MDC1A. The combination of full genomic sequencing and complementary DNA analysis led to the particularly high mutation detection rate of 96%...
Trinucleotide repeats in 202 families with ataxia: a small expanded (CAG)n alle...
Silveira, I; Miranda, C; Guimarães, L; Moreira, MC; Alonso, I; Mendonça, P; Ferro, A; Pinto-Basto, J; Coelho, J; Ferreirinha, F; Poirier, J; Vale, JBACKGROUND: Ten neurodegenerative disorders characterized by spinocerebellar ataxia (SCA) are known to be caused by trinucleotide repeat (TNR) expansions. However, in some instances the molecular diagnosis is considered indeterminate because of the overlap between normal and affected allele ranges. In addition, the mechanism that generates expanded alleles is not completely understood. OBJECTIVE: To examine the...
Clinical and Molecular Findings in Four New Patients Harbouring the mtDNA 8993T...
Vilarinho, L; Carrozzo, R; Barbot, C; Calado, E; Tessa, A; Dionisi-Vici, C; Guimarães, A; Santorelli, FM