Send to

Choose Destination
Nat Immunol. 2000 Dec;1(6):515-20.

NKT cell-mediated repression of tumor immunosurveillance by IL-13 and the IL-4R-STAT6 pathway.

Author information

Molecular Immunogenetics and Vaccine Research Section, Metabolism Branch, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA.


Using a mouse model in which tumors show a growth-regression-recurrence pattern, we investigated the mechanisms for down-regulation of cytotoxic T lymphocyte-mediated tumor immunosurveillance. We found that interleukin 4 receptor (IL-4R) knockout and downstream signal transducer and activator of transcription 6 (STAT6) knockout, but not IL-4 knockout, mice resisted tumor recurrence, which implicated IL-13, the only other cytokine that uses the IL-4R-STAT6 pathway. We confirmed this by IL-13 inhibitor (sIL-13R alpha 2-Fc) treatment. Loss of natural killer T cells (NKT cells) in CD1 knockout mice resulted in decreased IL-13 production and resistance to recurrence. Thus, NKT cells and IL-13, possibly produced by NKT cells and signaling through the IL-4R-STAT6 pathway, are necessary for down-regulation of tumor immunosurveillance. IL-13 inhibitors may prove to be a useful tool in cancer immunotherapy.

[Indexed for MEDLINE]

Supplemental Content

Full text links

Icon for Nature Publishing Group
Loading ...
Support Center