Keap1-null mutation leads to postnatal lethality due to constitutive Nrf2 activation.
Nat Genet
; 35(3): 238-45, 2003 Nov.
Article
en En
| MEDLINE
| ID: mdl-14517554
ABSTRACT
Transcription factor Nrf2 (encoded by Nfe2l2) regulates a battery of detoxifying and antioxidant genes, and Keap1 represses Nrf2 function. When we ablated Keap1, Keap1-deficient mice died postnatally, probably from malnutrition resulting from hyperkeratosis in the esophagus and forestomach. Nrf2 activity affects the expression levels of several squamous epithelial genes. Biochemical data show that, without Keap1, Nrf2 constitutively accumulates in the nucleus to stimulate transcription of cytoprotective genes. Breeding to Nrf2-deficient mice reversed the phenotypic Keap1 deficiencies. These experiments show that Keap1 acts upstream of Nrf2 in the cellular response to oxidative and xenobiotic stress.
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Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Proteínas Portadoras
/
Transactivadores
/
Proteínas del Citoesqueleto
/
Proteínas Adaptadoras Transductoras de Señales
/
Proteínas de Unión al ADN
/
Genes Letales
/
Mutación
Límite:
Animals
Idioma:
En
Revista:
Nat Genet
Asunto de la revista:
GENETICA MEDICA
Año:
2003
Tipo del documento:
Article
País de afiliación:
Japón