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Cutting Edge |
,


Departments of
*
Neurology and
Microbiology and Immunology and
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-
, 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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