Publication Date:
2006-04-01
Description:
IRAK-4 is a protein kinase that is pivotal in mediating signals for innate immune responses. Here, we report that IRAK-4 signaling is also essential for eliciting adaptive immune responses. Thus, in the absence of IRAK-4, in vivo T cell responses were significantly impaired. Upon T cell receptor stimulation, IRAK-4 is recruited to T cell lipid rafts, where it induces downstream signals, including protein kinase C activation through the association with Zap70. This signaling pathway was found to be required for optimal activation of nuclear factor kappaB. Our findings suggest that T cells use this critical regulator of innate immunity for the development of acquired immunity, suggesting that IRAK-4 may be involved in direct signal cross talk between the two systems.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Suzuki, Nobutaka -- Suzuki, Shinobu -- Millar, Douglas G -- Unno, Midori -- Hara, Hiromitsu -- Calzascia, Thomas -- Yamasaki, Sho -- Yokosuka, Tadashi -- Chen, Nien-Jung -- Elford, Alisha R -- Suzuki, Jun-Ichiro -- Takeuchi, Arata -- Mirtsos, Christine -- Bouchard, Denis -- Ohashi, Pamela S -- Yeh, Wen-Chen -- Saito, Takashi -- New York, N.Y. -- Science. 2006 Mar 31;311(5769):1927-32.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory for Cell Signaling, RIKEN Research Center for Allergy and Immunology, 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama City, Kanagawa 230-0045, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16574867" target="_blank"〉PubMed〈/a〉
Keywords:
Animals
;
Enzyme Activation
;
Immunity, Innate
;
Interleukin-1 Receptor-Associated Kinases
;
Isoenzymes/metabolism
;
*Lymphocyte Activation
;
Membrane Microdomains/enzymology
;
Mice
;
Mice, Inbred BALB C
;
Mice, Inbred C57BL
;
Mice, Transgenic
;
NF-kappa B/metabolism
;
Phosphotransferases (Alcohol Group Acceptor)/genetics/*metabolism
;
Protein Kinase C/metabolism
;
Receptors, Antigen, T-Cell/immunology
;
Signal Transduction
;
T-Lymphocytes/*immunology
;
ZAP-70 Protein-Tyrosine Kinase/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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