The Journal of Experimental Medicine
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Published online 13 January 2003 doi:10.1084/jem.20021500
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© Rockefeller University Press, 0022-1007/2003/1/163 $5.00
The Journal of Experimental Medicine, Volume 197, Number 2, 163-168

Human T Cell Receptor {gamma}{delta} Cells Recognize Endogenous Mevalonate Metabolites in Tumor Cells

Hans-Jürgen Gober1, Magdalena Kistowska1, Lena Angman1, Paul Jenö2, Lucia Mori1 and Gennaro De Libero1

1 Experimental Immunology, Department of Research, University Hospital, Basel
2 Department of Biochemistry, Biozentrum, University of Basel, CH-4056 Basel, Switzerland

Address correspondence to Gennaro De Libero, Experimental Immunology, Department of Research, University Hospital, Hebelstrasse 20, CH-4031 Basel, Switzerland. Phone: 41-61-265-2327; Fax: 41-61-265-2350; E-mail: Gennaro.DeLibero{at}unibas.ch

T lymphocytes expressing the T cell receptor (TCR)-{gamma}{delta} recognize unknown antigens on tumor cells. Here we identify metabolites of the mevalonate pathway as the tumor ligands that activate TCR-{gamma}{delta} cells. In tumor cells, blockade of hydroxy-methylglutaryl-CoA reductase (HMGR), the rate limiting enzyme of the mevalonate pathway, prevents both accumulation of mevalonate metabolites and recognition by TCR-{gamma}{delta} cells. When metabolite accumulation is induced by overexpressing HMGR or by treatment with nitrogen-containing bisphosphonate drugs, tumor cells derived from many tissues acquire the capacity to stimulate the same TCR-{gamma}{delta} population. Accumulation of mevalonate metabolites in tumor cells is a powerful danger signal that activates the immune response and may represent a novel target of tumor immunotherapy.

Key Words: antigen recognition • tumor antigen • HMGR • IPP • bisphosphonate drugs


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