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Increased muscle stress-sensitivity induced by selenoprotein N inactivation in mouse: a mammalian model for SEPN1-related myopathy.
Rederstorff, Mathieu; Castets, Perrine; Arbogast, Sandrine; Lainé, Jeanne; Vassilopoulos, Stéphane; Beuvin, Maud; Dubourg, Odile; Vignaud, Alban; Ferry, Arnaud; Krol, Alain; Allamand, Valérie; Guicheney, Pascale; Ferreiro, Ana; Lescure, Alain.
Afiliação
  • Rederstorff M; Architecture et Réactivité de l'ARN, Université de Strasbourg, CNRS, IBMC, Strasbourg, France.
PLoS One ; 6(8): e23094, 2011.
Article em En | MEDLINE | ID: mdl-21858002
ABSTRACT
Selenium is an essential trace element and selenoprotein N (SelN) was the first selenium-containing protein shown to be directly involved in human inherited diseases. Mutations in the SEPN1 gene, encoding SelN, cause a group of muscular disorders characterized by predominant affection of axial muscles. SelN has been shown to participate in calcium and redox homeostasis, but its pathophysiological role in skeletal muscle remains largely unknown. To address SelN function in vivo, we generated a Sepn1-null mouse model by gene targeting. The Sepn1(-/-) mice had normal growth and lifespan, and were macroscopically indistinguishable from wild-type littermates. Only minor defects were observed in muscle morphology and contractile properties in SelN-deficient mice in basal conditions. However, when subjected to challenging physical exercise and stress conditions (forced swimming test), Sepn1(-/-) mice developed an obvious phenotype, characterized by limited motility and body rigidity during the swimming session, as well as a progressive curvature of the spine and predominant alteration of paravertebral muscles. This induced phenotype recapitulates the distribution of muscle involvement in patients with SEPN1-Related Myopathy, hence positioning this new animal model as a valuable tool to dissect the role of SelN in muscle function and to characterize the pathophysiological process.
Assuntos

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Músculo Esquelético / Selenoproteínas / Proteínas Musculares / Doenças Musculares Tipo de estudo: Diagnostic_studies / Prognostic_studies Limite: Animals Idioma: En Revista: PLoS One Assunto da revista: CIENCIA / MEDICINA Ano de publicação: 2011 Tipo de documento: Article País de afiliação: França

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Músculo Esquelético / Selenoproteínas / Proteínas Musculares / Doenças Musculares Tipo de estudo: Diagnostic_studies / Prognostic_studies Limite: Animals Idioma: En Revista: PLoS One Assunto da revista: CIENCIA / MEDICINA Ano de publicação: 2011 Tipo de documento: Article País de afiliação: França