Abstract:
:Previous studies have shown that IL-10 inhibits the accessory cell functions required for production of IFN-gamma by T cells and NK cells. Our results show that although IL-10 did not induce the production of IFN-gamma by NK cells, it did enhance the ability of IL-18 to stimulate NK cell production of IFN-gamma. In addition, IL-10 augmented NK cell proliferation and cytotoxic activity when combined with IL-18. However, IL-10 did not affect the ability of IL-12 to stimulate NK cells to produce IFN-gamma or proliferate, but there was an additive effect with IL-12 to increase NK cell cytotoxic activity. Interestingly, the type I IFN, whose receptors (R) are related to the IL-10R, also enhanced the effects of IL-18 on NK cell production of IFN-gamma and NK cell cytotoxicity. The ability of IL-10 to elevate the production of IFN-gamma appeared to be specific for NK cells since IL-10 had no effect on the production of IFN-gamma by Th1 clones stimulated with IL-18 or IL-12 in the presence of a monoclonal antibody specific for CD3. These latter results correlated with lower mRNA levels for the alpha and beta chains of the IL-10R in Th1 cells than observed in NK cells. Thus, the ability of IL-10 and IL-18 to up-regulate NK cell function, but not Th1 cell activity, appears to be based on expression of the IL-10R.
journal_name
Eur J Immunoljournal_title
European journal of immunologyauthors
Cai G,Kastelein RA,Hunter CAdoi
10.1002/(SICI)1521-4141(199909)29:09<2658::AID-IMMkeywords:
subject
Has Abstractpub_date
1999-09-01 00:00:00pages
2658-65issue
9eissn
0014-2980issn
1521-4141journal_volume
29pub_type
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