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The Journal of Immunology, 2002, 168: 1-4.
Copyright © 2002 by The American Association of Immunologists


Cutting Edge

Cutting Edge: IL-10-Producing CD4+ T Cells Mediate Tumor Rejection1

Benjamin M. Segal2,*,{dagger},{ddagger}, Deborah D. Glass§ and Ethan M. Shevach§

Departments of * Neurology and {dagger} Microbiology and Immunology and {ddagger} The Cancer Center, University of Rochester School of Medicine and Dentistry, Rochester, NY 14642; and § Laboratory of Immunology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892

IL-10 has potent immunosuppressive properties, and IL-10-producing CD4+ Tr1 cells have been characterized as regulators of Th1-mediated immunity. In this study, using a s.c. model of glioma cell growth in mice, we demonstrate that CD4+, but not CD8+, T cells play a critical role in tumor rejection following vaccination with irradiated glioma cells. Surprisingly, glioma-specific CD4+ T cells produce IL-10 but neither IL-4 nor IFN-{gamma}, and glioma rejection is compromised in IL-10-/- hosts. Hence, our findings demonstrate that IL-10-producing CD4+ T cells can manifest antitumor functions and suggest that IL-10 may have proinflammatory effects in disease states.




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