Publication Date:
2002-09-21
Description:
Interferons (IFNs) are essential for host defense. Although the antiviral effects of the type 1 IFNs IFN-alpha and IFN-beta (IFN-alpha/beta) have been established, their immunoregulatory functions, especially their ability to regulate IFN-gamma production, are poorly understood. Here we show that IFN-alpha/beta activate STAT4 directly (STAT, signal transducers and activators of transcription) and that this is required for IFN-gamma production during viral infections of mice, in concert with T cell receptor-derived signals. In contrast, STAT1 appears to negatively regulate IFN-alpha/beta induction of IFN-gamma. Thus, type 1 IFNs, in addition to interleukin-12, provide pathways for innate regulation of adaptive immunity, and their immunoregulatory functions are controlled by modulating the activity of individual STATs.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Nguyen, Khuong B -- Watford, Wendy T -- Salomon, Rachelle -- Hofmann, Sigrun R -- Pien, Gary C -- Morinobu, Akio -- Gadina, Massimo -- O'Shea, John J -- Biron, Christine A -- F31-GM20760-02/GM/NIGMS NIH HHS/ -- R01-CA41268/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 2002 Sep 20;297(5589):2063-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular Microbiology and Immunology, Division of Biology and Medicine, Brown University, Providence, RI 02912, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12242445" target="_blank"〉PubMed〈/a〉
Keywords:
Animals
;
Arenaviridae Infections/*immunology
;
CD8-Positive T-Lymphocytes/*immunology/metabolism
;
Cells, Cultured
;
DNA-Binding Proteins/*metabolism
;
Female
;
Gene Expression Regulation
;
Interferon Type I/*immunology/pharmacology
;
Interferon-gamma/*biosynthesis/genetics
;
Interleukin-12/physiology
;
*Lymphocytic choriomeningitis virus
;
Male
;
Mice
;
Mice, Inbred C57BL
;
Phosphorylation
;
Promoter Regions, Genetic
;
Receptors, Antigen, T-Cell/immunology/metabolism
;
Recombinant Proteins
;
STAT1 Transcription Factor
;
STAT4 Transcription Factor
;
Signal Transduction
;
Th1 Cells/immunology/metabolism
;
Trans-Activators/*metabolism
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
,
Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
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