Abstract:
:Interferon-gamma inducing factor (IGIF) is a recently identified cytokine which stimulates the production of interferon-gamma (IFN-gamma) by T cells and enhances natural killer (NK) cell cytolytic activity. Protein fold recognition, structure prediction and comparative modeling have revealed that IGIF is a member of the interleukin (IL)-1 cytokine family and has prompted the designation IL-1 gamma. Here we report functional similarities between members of the IL-1 family by comparing the effects of IL-1 alpha, IL-1 beta and IGIF on NK cell production of IFN-gamma. All three IL-1 types enhanced NK cell production of IFN-gamma when induced by IL-2 or IL-12, although at high concentrations (> 10 ng/ml), IGIF was five- to tenfold more potent than IL-1 alpha or IL-1 beta. This effect correlated with enhanced levels of mRNA for IFN-gamma when NK cells were stimulated with IGIF plus IL-12. In contrast to IL-12 and IL-2, the ability of IGIF to stimulate NK cell production of IFN-gamma was not increased by IL-1 alpha or IL-1 beta. The ability of IGIF to enhance IFN-gamma production was independent of the type I and type II IL-1 receptors or the IL-1R accessory protein. Together, these results identify IGIF as a potent stimulator of NK cell production of IFN-gamma and demonstrate that the effect of IGIF on NK cell production of IFN-gamma is similar to that of IL-1 alpha and IL-1 beta but distinct from that of IL-12.
journal_name
Eur J Immunoljournal_title
European journal of immunologyauthors
Hunter CA,Timans J,Pisacane P,Menon S,Cai G,Walker W,Aste-Amezaga M,Chizzonite R,Bazan JF,Kastelein RAdoi
10.1002/eji.1830271107subject
Has Abstractpub_date
1997-11-01 00:00:00pages
2787-92issue
11eissn
0014-2980issn
1521-4141journal_volume
27pub_type
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