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The Molecular and Phenotypic Basis of the Glioma Invasive Perivascular Niche
Mohammed Diksin1, Stuart J Smith2, Ruman Rahman3
1Children's Brain Tumour Research Centre, School of Medicine, University of Nottingham, Nottingham NG7 2UH, UK. mohammed.diksin@nottingham.ac.uk.
Abstract:
Gliomas are devastating brain cancers that have poor prognostic outcomes for their patients. Short overall patient survival is due to a lack of durable, efficacious treatment options. Such therapeutic difficulties exist, in part, due to several glioma survival adaptations and mechanisms, which allow glioma cells to repurpose paracrine signalling pathways and ion channels within discreet microenvironments. These Darwinian adaptations facilitate invasion into brain parenchyma and perivascular space or promote evasion from anti-cancer defence mechanisms. Ultimately, this culminates in glioma repopulation and migration at distances beyond the original tumour site, which is a considerable obstacle for effective treatment. After an era of failed phase II trials targeting individual signalling pathways, coupled to our increasing knowledge of glioma sub-clonal divergence, combinatorial therapeutic approaches which target multiple molecular pathways and mechanisms will be necessary for better treatment outcomes in treating malignant gliomas. Furthermore, next-generation therapy which focuses on infiltrative tumour phenotypes and disruption of the vascular and perivascular microenvironments harbouring residual disease cells offers optimism for the localised control of malignant gliomas.
Insights
Malignant gliomas are aggressive brain tumors with poor survival due to limited treatments. New combination therapies targeting multiple pathways and tumor microenvironments offer hope for better patient outcomes.
Area of Science:
- Neuro-oncology
- Cancer biology
- Molecular medicine
Background:
- Gliomas exhibit poor prognostic outcomes due to limited effective treatments.
- Glioma cells adapt by repurposing signaling pathways and ion channels for survival and invasion.
- Tumor heterogeneity and sub-clonal divergence complicate treatment strategies.
Purpose of the Study:
- To review the challenges in treating malignant gliomas.
- To highlight the need for combinatorial therapeutic approaches.
- To discuss the potential of next-generation therapies targeting tumor microenvironments.
Main Methods:
- Review of current literature on glioma biology and treatment strategies.
- Analysis of therapeutic challenges posed by glioma adaptations.
- Exploration of novel treatment paradigms.
Main Results:
- Existing treatments are often ineffective due to glioma's adaptive mechanisms.
- Targeting individual pathways has yielded limited success in clinical trials.
- Combinatorial therapies and microenvironment-targeted approaches show promise.
Conclusions:
- Effective treatment of malignant gliomas requires targeting multiple molecular pathways simultaneously.
- Next-generation therapies focusing on infiltrative phenotypes and microenvironments are crucial for localized tumor control.
- A shift towards combinatorial and microenvironment-focused strategies is necessary for improved patient survival.
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