Site alpha is crucial for two routes of IFN gamma-induced MHC class I transactivation: the ISRE-mediated route and a novel pathway involving CIITA.
Immunity
; 6(5): 601-11, 1997 May.
Article
em En
| MEDLINE
| ID: mdl-9175838
ABSTRACT
The constitutive and cytokine-induced levels of major histocompatibility (MHC) class I expression are tightly controlled at the transcriptional level. In this study, it is shown that the cis-acting regulatory element site alpha of the MHC class I promoter is essential for the IFN gamma-induced transactivation of MHC class I gene expression through the ISRE. Moreover, it was discovered that the class II transactivator (CIITA), which is itself under the control of the IFN gamma induction pathway, strongly transactivates MHC class I gene expression and exerts its activity through site alpha. Therefore, site alpha is a crucial regulatory element, mediating the classic route of IFN gamma induction via the ISRE as well as a novel route of MHC class I transactivation involving CIITA.
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Base de dados:
MEDLINE
Assunto principal:
Genes MHC Classe I
/
Proteínas Nucleares
/
Ativação Transcricional
/
Transativadores
/
Interferon gama
/
Regiões Promotoras Genéticas
/
Proteínas de Ligação a DNA
Limite:
Humans
Idioma:
En
Ano de publicação:
1997
Tipo de documento:
Article