Central role for type I interferons and Tyk2 in lipopolysaccharide-induced endotoxin shock
Author
Summary, in English
Toll-like receptor-4 activation by lipopolysaccharide (LPS) induces the expression of interferon-P (IFN-beta) in a MyD88-independent manner. Here we report that mice devoid of the JAK protein tyrosine kinase family member, Tyk2, were resistant to shock induced by high doses of LPS. Basal and LPS-induced expression of IFN-beta and IFN-alpha4 mRNA in Tyk2-null macrophages were diminished. However, Tyk2-null mice showed normal systemic production of nitric oxide and proinflammatory cytokines and the in vivo response to tumor necrosis factor (TNF) was unperturbed. IFN-beta-null but not STAT1-null mice were also resistant to high dose LPS treatment. Together, these data suggest that Tyk2 and IFN-beta are essential effectors in LPS induced lethality.
Department/s
- Immunology
Publishing year
2003
Language
English
Pages
471-477
Publication/Series
Nature Immunology
Volume
4
Issue
5
Document type
Journal article
Publisher
Nature Publishing Group
Topic
- Immunology in the medical area
Status
Published
Research group
- Immunology
ISBN/ISSN/Other
- ISSN: 1529-2908