Data/hora: 10/06/2024 06:38:06

Provedor de dados: | 74
País: | Brazil
Título: | DNM2 mutations in a cohort of sporadic patients with centronuclear myopathy
Autores: | Abath Neto,Osorio; Martins,Cristiane de Araújo; Carvalho,Mary; Chadi,Gerson; Seitz,Katia Werneck; Oliveira,Acary Souza Bulle; Reed,Umbertina Conti; Laporte,Jocelyn; Zanoteli,Edmar.
Data: | 2015-06-01
Ano: | 2015
Palavras-chave: | Centronuclear myopathy; DNM2; Dynamin 2; Congenital myopathy.
Resumo: | Centronuclear myopathy (CNM) is a rare congenital muscle disease characterized by fibers with prominent centralized nuclei in muscle biopsies. The disease is clinically heterogeneous, ranging from severe neonatal hypotonic phenotypes to adult-onset mild muscle weakness, and can have multiple modes of inheritance in association with various genes, including MTM1, DNM2, BIN1 and RYR1. Here we analyzed 18 sporadic patients with clinical and histological diagnosis of CNM and sequenced the DNM2 gene, which codes for the dynamin 2 protein. We found DNM2 missense mutations in two patients, both in exon 8, one known (p.E368K) and one novel (p.F372C), which is found in a position of presumed pathogenicity and appeared de novo. The patients had similar phenotypes characterized by neonatal signs followed by improvement and late childhood reemergence of slowly progressive generalized muscle weakness, elongated face with ptosis and ophthalmoparesis, and histology showing fibers with radiating sarcoplasmic strands (RSS). These patients were the only ones in the series to present this histological marker, which together with previous reports in the literature suggest that, when RSS are present, direct sequencing of DNM2 mutation hot spot regions should be the first step in the molecular diagnosis of CNM, even in sporadic cases.
Tipo: | Info:eu-repo/semantics/report
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572015000200147
Editor: | Sociedade Brasileira de Genética
Relação: | 10.1590/S1415-4757382220140238
Formato: | text/html
Fonte: | Genetics and Molecular Biology  v.38 n.2 2015
Fonte: | info:eu-repo/semantics/openAccess