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Updated: Jun 18, 2025
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Isolation and Flow Cytometric Analysis of Glioma-infiltrating Peripheral Blood Mononuclear Cells
Published on: November 28, 2015
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Cranioencephalic functional lymphoid units in glioblastoma
Celia Dobersalske1,2,3, Laurèl Rauschenbach1,3,4,5,6, Yichao Hua7
1German Cancer Consortium (DKTK), partner site Essen/Düsseldorf, a partnership between DKFZ and University Hospital Essen, University Duisburg-Essen, Essen, Germany.
Nature Medicine
|July 31, 2024
Summary
Cranial bone marrow near glioblastoma tumors contains active CD8+ T cells that fight cancer. This discovery suggests preserving this bone marrow may improve glioblastoma treatment outcomes.
Area of Science:
- Neuro-oncology
- Immunology
- Cancer Biology
Background:
- Glioblastoma microenvironment is often considered immunosuppressed.
- Limited understanding of immune cell presence in cranial bone marrow adjacent to tumors.
Purpose of the Study:
- To investigate lymphoid populations in cranial bone marrow of glioblastoma patients.
- To identify immune cell characteristics and their association with tumor response.
Main Methods:
- Analysis of clinical cell and tissue specimens from glioblastoma and control patients.
- Utilized clinical imaging, single-cell profiling, and immune cell quantification.
- Assessed T cell clonotypes, effector types, and lymphoid egress markers.
Main Results:
- Active lymphoid populations, including tumor-reactive CD8+ T cells, found in cranial bone marrow near glioblastoma.
- Identified CD8+ effector T cells expressing S1PR1 in the tumor-proximal CB niche.
- Cranial CXCR4 enhancement correlated with improved progression-free survival.
Conclusions:
- Cranial bone marrow harbors active, tumor-reactive T cells at glioblastoma diagnosis.
- These findings challenge the notion of a fully immunosuppressed tumor ecosystem.
- Suggests exploiting cranioencephalic immune units for glioblastoma therapy.
