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Tumour-associated macrophage-derived interleukin-1 mediates glioblastoma-associated cerebral oedema.
- Source :
-
Brain : a journal of neurology [Brain] 2019 Dec 01; Vol. 142 (12), pp. 3834-3851. - Publication Year :
- 2019
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Abstract
- Glioblastoma is the most common and uncompromising primary brain tumour and is characterized by a dismal prognosis despite aggressive treatment regimens. At the cellular level, these tumours are composed of a mixture of neoplastic cells and non-neoplastic cells, including tumour-associated macrophages and endothelial cells. Cerebral oedema is a near-universal occurrence in patients afflicted with glioblastoma and it is almost exclusively managed with the corticosteroid dexamethasone despite significant drawbacks associated with its use. Here, we demonstrate that dexamethasone blocks interleukin-1 production in both bone marrow-derived and brain resident macrophage populations following stimulation with lipopolysaccharide and interferon gamma. Additionally, dexamethasone is shown to inhibit downstream effectors of interleukin-1 signalling in both macrophage populations. Co-culture of bone marrow-derived macrophages with organotypic tumour slices results in an upregulation of interleukin-1 cytokines, an effect that is absent in co-cultured microglia. Genetic ablation of interleukin-1 ligands or receptor in mice bearing RCAS/tv-a-induced platelet-derived growth factor B-overexpressing glioblastoma results in reduced oedema and partial restoration of the integrity of the blood-brain barrier, respectively; similar to results obtained with vascular endothelial growth factor neutralization. We establish that tumours from dexamethasone-treated mice exhibit reduced infiltration of cells of the myeloid and lymphoid compartments, an effect that should be considered during clinical trials for immunotherapy in glioblastoma patients. Additionally, we emphasize that caution should be used when immune profiling and single-cell RNA sequencing data are interpreted from fresh glioblastoma patient samples, as nearly all patients receive dexamethasone after diagnosis. Collectively, this evidence suggests that interleukin-1 signalling inhibition and dexamethasone treatment share therapeutic efficacies and establishes interleukin-1 signalling as an attractive and specific therapeutic target for the management of glioblastoma-associated cerebral oedema.<br /> (© The Author(s) (2019). Published by Oxford University Press on behalf of the Guarantors of Brain. All rights reserved. For permissions, please email: journals.permissions@oup.com.)
- Subjects :
- Animals
Bone Marrow Cells drug effects
Bone Marrow Cells metabolism
Bone Marrow Cells pathology
Brain Edema etiology
Brain Edema pathology
Brain Neoplasms complications
Brain Neoplasms pathology
Dexamethasone pharmacology
Glioblastoma complications
Glioblastoma pathology
Glucocorticoids pharmacology
Macrophages drug effects
Macrophages pathology
Mice
Microglia drug effects
Microglia metabolism
Signal Transduction drug effects
Brain Edema metabolism
Brain Neoplasms metabolism
Glioblastoma metabolism
Interleukin-1 metabolism
Macrophages metabolism
Subjects
Details
- Language :
- English
- ISSN :
- 1460-2156
- Volume :
- 142
- Issue :
- 12
- Database :
- MEDLINE
- Journal :
- Brain : a journal of neurology
- Publication Type :
- Academic Journal
- Accession number :
- 31665239
- Full Text :
- https://doi.org/10.1093/brain/awz331