Therapeutic response in feline sandhoff disease despite immunity to intracranial gene therapy.
Mol Ther
; 21(7): 1306-15, 2013 Jul.
Article
em En
| MEDLINE
| ID: mdl-23689599
ABSTRACT
Salutary responses to adeno-associated viral (AAV) gene therapy have been reported in the mouse model of Sandhoff disease (SD), a neurodegenerative lysosomal storage disease caused by deficiency of ß-N-acetylhexosaminidase (Hex). While untreated mice reach the humane endpoint by 4.1 months of age, mice treated by a single intracranial injection of vectors expressing human hexosaminidase may live a normal life span of 2 years. When treated with the same therapeutic vectors used in mice, two cats with SD lived to 7.0 and 8.2 months of age, compared with an untreated life span of 4.5 ± 0.5 months (n = 11). Because a pronounced humoral immune response to both the AAV1 vectors and human hexosaminidase was documented, feline cDNAs for the hexosaminidase α- and ß-subunits were cloned into AAVrh8 vectors. Cats treated with vectors expressing feline hexosaminidase produced enzymatic activity >75-fold normal at the brain injection site with little evidence of an immune infiltrate. Affected cats treated with feline-specific vectors by bilateral injection of the thalamus lived to 10.4 ± 3.7 months of age (n = 3), or 2.3 times as long as untreated cats. These studies support the therapeutic potential of AAV vectors for SD and underscore the importance of species-specific cDNAs for translational research.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Doença de Sandhoff
/
Beta-N-Acetil-Hexosaminidases
/
Doenças do Gato
Limite:
Animals
Idioma:
En
Ano de publicação:
2013
Tipo de documento:
Article