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Regulatory T cells actively infiltrate metastatic brain tumors
Adam Quasar Sugihara1, Cleo E Rolle, Maciej S Lesniak
1The Brain Tumor Center, The University of Chicago, Chicago, IL 60637, USA.
Abstract:
Regulatory T cells (CD4+CD25+FoxP3+, Treg) have been shown to play a major role in suppression of the immune response to malignant gliomas. In this study, we investigated the kinetics of Treg infiltration in metastatic brain tumor models, including melanoma, breast and colon cancers. Our data indicate that both CD4+ and Treg infiltration are significantly increased throughout the time of metastatic tumor progression. These findings were recapitulated in human CNS tumor samples of metastatic melanoma and non-small cell lung carcinoma. Collectively, these data support investigating immunotherapeutic strategies targeting Treg in metastatic CNS tumors.
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