In vitro assay for the efficacy assessment of AAV vectors expressing microdystrophin.
Exp Cell Res
; 392(2): 112033, 2020 07 15.
Article
em En
| MEDLINE
| ID: mdl-32360435
ABSTRACT
AAV-delivered microdystrophin genes hold great promise for Duchenne muscular dystrophy (DMD) treatment. It is anticipated that the optimization of engineered dystrophin genes will be required to increase the efficacy and reduce the immunogenicity of transgenic proteins. An in vitro system is required for the efficacy testing of genetically engineered dystrophin genes. We report here on the proof of concept for an in vitro assay based on the assessment of sarcolemma damage after repetitively applied electrical stimuli. The primary cell culture of myoblasts was established from wild-type C57BL/10ScSnJ and dystrophin-deficient mdx mice. The preparation parameters and the differentiation of contractile myotubes were optimized. DAPI and TO-PRO-3 dyes were used to assess myotubular membrane permeability in response to electrical pulse stimulation (EPS). Myotubes derived from mdx mice exhibited a greater increase in membrane damage, as assessed by TO-PRO-3-measured permeability after EPS, than was exhibited by the healthy control myotubes. AAV-DJ particles carrying the microdystrophin gene were used to transduce mdx-derived differentiated myotubes. Microdystrophin delivery ameliorated the disease phenotype and reduced the EPS-induced membrane damage to a level comparable to that of the healthy controls. Thus, the in vitro system was shown to be capable of supporting studies on DMD gene therapy.
Palavras-chave
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Terapia Genética
/
Distrofina
/
Dependovirus
/
Distrofia Muscular de Duchenne
/
Mioblastos
/
Vetores Genéticos
/
Distrofia Muscular Animal
Limite:
Animals
Idioma:
En
Ano de publicação:
2020
Tipo de documento:
Article