|
||
J. Exp. Med.,
Volume 189, Number 7, April 5, 1999 1129-1138
By



From * R.W. Johnson Pharmaceutical Research Institute, San Diego, California 92121; Interleukin (IL)-18 is functionally similar to IL-12 in mediating T helper cell type 1 (Th1) response and natural killer (NK) cell activity but is related to IL-1 in protein structure and signaling, including recruitment of IL-1 receptor-associated kinase (IRAK) to the receptor and activation of c-Jun NH2-terminal kinase (JNK) and nuclear factor (NF)-
R.W. Johnson
Pharmaceutical Research Institute, Raritan, New Jersey 08869; and the § Department of Immunology
and Molecular Biology, Division of Virology, Scripps Research Institute, La Jolla, California 92037
B. The role of IRAK in
IL-18-induced responses was studied in IRAK-deficient mice. Significant defects in JNK induction and partial impairment in NF-
B activation were found in IRAK-deficient Th1 cells,
resulting in a dramatic decrease in interferon (IFN)-
mRNA expression. In vivo Th1 response
to Propionibacterium acnes and lipopolysaccharide in IFN-
production and induction of NK cytotoxicity by IL-18 were severely impaired in IRAK-deficient mice. IFN-
production by activated NK cells in an acute murine cytomegalovirus infection was significantly reduced despite
normal induction of NK cytotoxicity. These results demonstrate that IRAK plays an important
role in IL-18-induced signaling and function.
B;
nuclear factor
B;
interferon
;
murine cytomegalovirus
This article has been cited by other articles:
| TABLE OF CONTENTS |
|