Regulatory T cells actively infiltrate metastatic brain tumors.
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.
The Brain Tumor Center, The University of Chicago, Chicago, IL 60637, USA.
Adam Quasar
AQ
Sugihara
Cleo E
CE
Rolle
Maciej S
MS
Lesniak
D000818:Animals; D001932:Brain Neoplasms / Q000276:immunology* / Q000473:pathology; D002289:Carcinoma, Non-Small-Cell Lung / Q000276:immunology / Q000473:pathology; D003110:Colonic Neoplasms / Q000276:immunology / Q000473:pathology; D005260:Female; D005434:Flow Cytometry; D051858:Forkhead Transcription Factors / Q000378:metabolism; D006801:Humans; D008175:Lung Neoplasms / Q000276:immunology / Q000473:pathology; D016246:Lymphocytes, Tumor-Infiltrating; D008325:Mammary Neoplasms, Experimental / Q000276:immunology / Q000473:pathology; D008546:Melanoma, Experimental / Q000276:immunology / Q000473:pathology; D051379:Mice; D008807:Mice, Inbred BALB C; D008810:Mice, Inbred C57BL; D050378:T-Lymphocytes, Regulatory / Q000276:immunology*
D051858:Forkhead Transcription Factors; C498833:Foxp3 protein, mouse