Identification of an IFN-gamma responsive region in an intron of the invariant chain gene.
Eur J Immunol
; 30(9): 2604-11, 2000 Sep.
Article
in En
| MEDLINE
| ID: mdl-11009094
ABSTRACT
The mechanism by which IFN-gamma up-regulates invariant chain mRNA in antigen-presenting cells has been under intensive investigation. This study shows that in murine monocytic cells the transcriptional up-regulation mediated by the invariant chain (Ii) upstream enhancer only accounts for part of the induction of Ii mRNA by IFN-gamma. We have identified an intronic region in the murine Ii gene that contributes to the transcriptional up-regulation by IFN-gamma. The region has S (H), X/X2 and Y boxes similar to those in MHC class II promoters and the Ii upstream enhancer. Mutations at the putative S, X and Y boxes have abolished the ability of the region to mediate Ii up-regulation by IFN-gamma. Consistent with the functions of these boxes, our findings reveal that the up-regulation of Ii transcription by IFN-gamma mediated by the intronic region is dependent on the induction of class II transactivator by IFN-gamma.
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Collection:
01-internacional
Database:
MEDLINE
Main subject:
Introns
/
Antigens, Differentiation, B-Lymphocyte
/
Histocompatibility Antigens Class II
/
Interferon-gamma
/
Response Elements
Type of study:
Diagnostic_studies
/
Prognostic_studies
Limits:
Humans
Language:
En
Journal:
Eur J Immunol
Year:
2000
Document type:
Article
Affiliation country:
United States