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Efficacy and muscle safety assessment of fukutin-related protein gene therapy.
Benasutti, Halli; Maricelli, Joseph W; Seto, Jane; Hall, John; Halbert, Christine; Wicki, Jacqueline; Heusgen, Lydia; Purvis, Nicholas; Regnier, Michael; Lin, David C; Rodgers, Buel D; Chamberlain, Jeffrey S.
Afiliação
  • Benasutti H; Department of Biochemistry, University of Washington School of Medicine, Seattle, WA, USA.
  • Maricelli JW; Department of Neurology, University of Washington School of Medicine, Seattle, WA, USA.
  • Seto J; School of Molecular Biosciences, Washington State University College of Veterinary Medicine, Pullman, WA 99164, USA.
  • Hall J; Washington Center for Muscle Biology, Washington State University, Pullman, WA 99164, USA.
  • Halbert C; Department of Neurology, University of Washington School of Medicine, Seattle, WA, USA.
  • Wicki J; Sen. Paul D. Wellstone Muscular Dystrophy Specialized Research Center, University of Washington School of Medicine, Seattle, WA, USA.
  • Heusgen L; Department of Neurology, University of Washington School of Medicine, Seattle, WA, USA.
  • Purvis N; Department of Neurology, University of Washington School of Medicine, Seattle, WA, USA.
  • Regnier M; Sen. Paul D. Wellstone Muscular Dystrophy Specialized Research Center, University of Washington School of Medicine, Seattle, WA, USA.
  • Lin DC; Department of Neurology, University of Washington School of Medicine, Seattle, WA, USA.
  • Rodgers BD; Department of Neurology, University of Washington School of Medicine, Seattle, WA, USA.
  • Chamberlain JS; Department of Neurology, University of Washington School of Medicine, Seattle, WA, USA.
Mol Ther Methods Clin Dev ; 30: 65-80, 2023 Sep 14.
Article em En | MEDLINE | ID: mdl-37361354
ABSTRACT
Limb-girdle muscular dystrophy type R9 (LGMDR9) is a muscle-wasting disease that begins in the hip and shoulder regions of the body. This disease is caused by mutations in fukutin-related protein (FKRP), a glycosyltransferase critical for maintaining muscle cell integrity. Here we investigated potential gene therapies for LGMDR9 containing an FKRP expression construct with untranslated region (UTR) modifications. Initial studies treated an aged dystrophic mouse model (FKRPP448L) with adeno-associated virus vector serotype 6 (AAV6). Grip strength improved in a dose- and time-dependent manner, injected mice exhibited fewer central nuclei and serum creatine kinase levels were 3- and 5-fold lower compared to those in non-injected FKRPP448L mice. Treatment also partially stabilized the respiratory pattern during exercise and improved treadmill running, partially protecting muscle from exercise-induced damage. Western blotting of C2C12 myotubes using a novel rabbit antibody confirmed heightened translation with the UTR modifications. We further explored the question of FKRP toxicity in wild-type mice using high doses of two additional muscle-tropic capsids AAV9 and AAVMYO1. No toxic effects were detected with either therapeutic agent. These data further support the feasibility of gene therapy to treat LGMDR9.
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Texto completo: 1 Base de dados: MEDLINE Idioma: En Ano de publicação: 2023 Tipo de documento: Article

Texto completo: 1 Base de dados: MEDLINE Idioma: En Ano de publicação: 2023 Tipo de documento: Article