IL-13 production by NK cells:: IL-13-producing NK and T cells are present in vivo in the absence of IFN-γ

被引:0
|
作者
Hashino, T [1 ]
Winkler-Pickett, RT [1 ]
Mason, AT [1 ]
Ortaldo, JR [1 ]
Young, HA [1 ]
机构
[1] NCI, Expt Immunol Lab, Div Basic Sci,Biol Response Modifiers Program, Frederick Canc Res & Dev Ctr, Frederick, MD 21702 USA
来源
JOURNAL OF IMMUNOLOGY | 1999年 / 162卷 / 01期
关键词
D O I
暂无
中图分类号
R392 [医学免疫学]; Q939.91 [免疫学];
学科分类号
100102 ;
摘要
In this study, we demonstrate that human Mt cells, human NK clones, the human NK cell line (NK3.3), and a population of murine NK cells can produce the type 2 cytokine IL-13 in response to IL-2 or phorbol myristate acetate plus ionomycin, IL-2 rapidly induced new IL-13 mRNA and protein synthesis in the NK3.3 cell line, Six of 12 human NK clones tested produced IL-13 protein in response to IL-2 or phorbol myristate acetate and ionomycin, Intracellular analysis revealed that similar to 2% of human peripheral NK cells produced IL-13 protein in response to IL-2, Isolated NK cells from SCID and RAG-2 knockout (-/-) mice that lack T and B cells as well as normal mice also can produce IL-13 mRNA and protein in response to IL-2, We hypothesized that in the absence of IFN-gamma, IL-13-producing NK cells may predominate in vivo. Utilizing IFN-gamma knockout (-/-) mice as a model system, IL-2-activated liver NK and T cells expressed 10-fold more IL-13 and IL-5 mRNA and protein than normal controls following IL-2 treatment in vitro. These results suggest that in the absence of IFN-gamma, an IL-13- and IL-5-producing NK and T cells predominate in vivo. The existence of this cell type has important implications in innate immunity given that the balance between IFN-gamma and IL-13/IL-5-producing NK cells may influence the early development of a cell-mediated or humoral immune response.
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页码:51 / 59
页数:9
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