Pathway: IRF3 mediated activation of type 1 IFN
Reactions in pathway: IRF3 mediated activation of type 1 IFN :
IRF3 mediated activation of type 1 IFN
Interferon regulatory factors (IRF) IRF-3 and IRF-7 are the major modulators of IFN gene expression in response to pathogenic molecules. The relative contribution of IRF3 and IRF7 depends on the signaling pathway that is activated. Type I IFN production in cytosolic DNA-sensing pathway is mediated predominantly by IRF3 and partially by IRF7, since DNA-stimulated IFN-beta and IFN-alpha4 mRNA induction was strongly inhibited in IRF3-deficient mouse embryonic fibroblasts (MEFs), while remained normal (IFN-beta) or reduced (IFN-alpha4) in IRF7-deficient MEFs (Takaoke A et al 2007). IRF3 activation in response to B-DNA stimulation occurs via its co-recruitment with serine/threonine kinase TANK-binding kinase 1 (TBK1) or inducible IkB kinase (IKKi/IKKepsilon) to the C-terminal region of DAI.
Innate immunity encompases the nonspecific part of immunity tha are part of an individual's natural biologic makeup
Humans are exposed to millions of potential pathogens daily, through contact, ingestion, and inhalation. Our ability to avoid infection depends on the adaptive immune system and during the first critical hours and days of exposure to a new pathogen, our innate immune system.