The interferon-stimulated gene factor 3 complex mediates the inhibitory effect of interferon-beta on matrix metalloproteinase-9 expression.
FEBS J
; 274(24): 6456-68, 2007 Dec.
Article
em En
| MEDLINE
| ID: mdl-18028425
ABSTRACT
Matrix metalloproteinase-9 (MMP-9) displays a preference for a broad range of substrates including extracellular matrix proteins and cytokines. MMP-9 plays an important role in physiological processes, as well as in inflammatory diseases and numerous cancers. Interferon-beta is a pleiotropic cytokine with antiviral, antiproliferative and immunomodulatory activities. Interferon-beta positively regulates gene expression, predominantly through the Janus kinase-signal transducer and activator of transcription (STAT) pathway. However, little is known about the mechanisms used by interferon-beta to negatively regulate gene expression. In the present study, we show that interferon-beta inhibits MMP-9 gene expression at the transcriptional level. Using cell lines deficient in three components of the interferon-beta-activated interferon-stimulated gene factor 3 (ISGF3) complex (i.e. STAT-1, STAT-2 and interferon regulatory factor 9), the results of our study indicate that all three members are required for interferon-beta inhibition. Chromatin immunoprecipitation assays demonstrate that interferon-beta reduces recruitment of transcriptional activators and coactivators, such as nuclear factor kappa B p65, Sp1, CREB-binding protein and p300, to the MMP-9 promoter, and decreases the degree of histone acetylation at the MMP-9 promoter. This occurs in the absence of an association of the ISGF3 complex with the MMP-9 promoter. Taken together, these data define the role of interferon-beta and the ISGF3 members in suppressing MMP-9 gene expression.
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Base de dados:
MEDLINE
Assunto principal:
Interferon beta
/
Metaloproteinase 9 da Matriz
/
Fator Gênico 3 Estimulado por Interferon
Limite:
Humans
Idioma:
En
Revista:
FEBS J
Assunto da revista:
BIOQUIMICA
Ano de publicação:
2007
Tipo de documento:
Article
País de afiliação:
Estados Unidos