Article ; Online: Microglia promote anti-tumour immunity and suppress breast cancer brain metastasis.
2023 Volume 25, Issue 12, Page(s) 1848–1859
Abstract: Breast cancer brain metastasis (BCBM) is a lethal disease with no effective treatments. Prior work has shown that brain cancers and metastases are densely infiltrated with anti-inflammatory, protumourigenic tumour-associated macrophages, but the role of ... ...
Abstract | Breast cancer brain metastasis (BCBM) is a lethal disease with no effective treatments. Prior work has shown that brain cancers and metastases are densely infiltrated with anti-inflammatory, protumourigenic tumour-associated macrophages, but the role of brain-resident microglia remains controversial because they are challenging to discriminate from other tumour-associated macrophages. Using single-cell RNA sequencing, genetic and humanized mouse models, we specifically identify microglia and find that they play a distinct pro-inflammatory and tumour-suppressive role in BCBM. Animals lacking microglia show increased metastasis, decreased survival and reduced natural killer and T cell responses, showing that microglia are critical to promote anti-tumour immunity to suppress BCBM. We find that the pro-inflammatory response is conserved in human microglia, and markers of their response are associated with better prognosis in patients with BCBM. These findings establish an important role for microglia in anti-tumour immunity and highlight them as a potential immunotherapy target for brain metastasis. |
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MeSH term(s) | Mice ; Animals ; Humans ; Female ; Microglia ; Breast Neoplasms/genetics ; Breast Neoplasms/pathology ; Brain Neoplasms/pathology ; Brain/pathology ; Treatment Outcome |
Language | English |
Publishing date | 2023-11-13 |
Publishing country | England |
Document type | Journal Article |
ZDB-ID | 1474722-4 |
ISSN | 1476-4679 ; 1465-7392 |
ISSN (online) | 1476-4679 |
ISSN | 1465-7392 |
DOI | 10.1038/s41556-023-01273-y |
Database | MEDical Literature Analysis and Retrieval System OnLINE |
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