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Mice devoid of interferon regulatory factor 1 (IRF-1) show normal expression of type I interferon genes.


ABSTRACT: The transcription factor interferon regulatory factor 1 (IRF-1) binds tightly to the interferon (IFN)-beta promoter and has been implicated in the induction of type I IFNs. We generated mice devoid of functional IRF-1 by targeted gene disruption. As reported by others, IRF-1-deficient mice showed a discrete phenotype: the CD4/CD8 ratio was increased and IFN-gamma-induced levels of macrophage iNO synthase mRNA were strongly diminished. However, type I IFN induction in vivo by virus or double-stranded RNA was unimpaired, as evidenced by serum IFN titers and IFN mRNA levels in spleen, liver and lung. There was also no impairment in the response of type I IFN-inducible genes. Therefore, IRF-1 is not essential for these processes in vivo.

SUBMITTER: Reis LF 

PROVIDER: S-EPMC395418 | biostudies-other | 1994 Oct

REPOSITORIES: biostudies-other

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Mice devoid of interferon regulatory factor 1 (IRF-1) show normal expression of type I interferon genes.

Reis L F LF   Ruffner H H   Stark G G   Aguet M M   Weissmann C C  

The EMBO journal 19941001 20


The transcription factor interferon regulatory factor 1 (IRF-1) binds tightly to the interferon (IFN)-beta promoter and has been implicated in the induction of type I IFNs. We generated mice devoid of functional IRF-1 by targeted gene disruption. As reported by others, IRF-1-deficient mice showed a discrete phenotype: the CD4/CD8 ratio was increased and IFN-gamma-induced levels of macrophage iNO synthase mRNA were strongly diminished. However, type I IFN induction in vivo by virus or double-stra  ...[more]

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