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The glymphatic system and glioblastoma
Andrea Soumbasis1,2, Aito Ueno1,2,3,4, David Elliott2,3,5
1Department of Clinical Neurosciences, Foothills Medical Centre, Calgary, AB T2N 2T9, Canada.
Brain : a Journal of Neurology
|November 28, 2025
Summary
The brain's waste removal system, the glymphatic system, is impaired by glioblastoma (GBM). Understanding this glymphatic dysfunction in GBM could lead to new treatments for brain cancer.
Area of Science:
- Neuroscience
- Immunology
- Oncology
Background:
- The glymphatic system and meningeal lymphatics are key to brain waste clearance, challenging the concept of CNS immune privilege.
- The brain maintains homeostasis without conventional lymphatic drainage, but pathological impacts are underexplored.
Purpose of the Study:
- To review the impact of glioblastoma (GBM) on the glymphatic system.
- To explore the consequences of GBM-induced glymphatic dysfunction.
- To discuss therapeutic potential targeting the glymphatic system in GBM.
Main Methods:
- Literature review of studies investigating glymphatic system function in the context of glioblastoma.
- Analysis of research on the interplay between GBM and glymphatic processes.
- Synthesis of findings on glymphatic dysfunction and its clinical implications in GBM.
Main Results:
- Glioblastoma (GBM) causes glymphatic system dysfunction.
- This dysfunction impacts brain immunity, drug delivery, fluid balance, and tumor progression.
- The glymphatic system plays a significant role in GBM biology and treatment response.
Conclusions:
- Glioblastoma significantly impairs the brain's glymphatic clearance system.
- Harnessing the glymphatic system offers potential therapeutic strategies for GBM.
- Further research is needed to fully understand and exploit the glymphatic system in GBM treatment.

