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Published on: November 28, 2015
Prospects of immune checkpoint modulators in the treatment of glioblastoma
Matthias Preusser1, Michael Lim2, David A Hafler3
1Department of Medicine I and Comprehensive Cancer Centre CNS Tumours Unit, Medical University of Vienna, Waehringer Guertel 18-20, 1090 Vienna, Austria.
Abstract:
Glioblastoma is the most common primary brain tumour in adults. Prognosis is poor: even with the current gold-standard first-line treatment—maximal safe resection and combination of radiotherapy with temozolomide chemotherapy—the median overall survival time is only approximately 15-17 months, because the tumour recurs in virtually all patients, and no commonly accepted standard treatment for recurrent disease exists. Several targeted agents have failed to improve patient outcomes in glioblastoma. Immunotherapy with immune checkpoint inhibitors such as ipilimumab, nivolumab, and pembrolizumab has provided relevant clinical improvements in other advanced tumours for which conventional therapies have had limited success, making immunotherapy an appealing strategy in glioblastoma. This Review summarizes current knowledge on immune checkpoint modulators and evaluates their potential role in glioblastoma on the basis of preclinical studies and emerging clinical data. Furthermore, we discuss challenges that need to be considered in the clinical development of drugs that target immune checkpoint pathways in glioblastoma, such as specific properties of the immune system in the CNS, issues with radiological response assessment, and potential interactions with established and emerging treatment strategies.
Insights
Glioblastoma immunotherapy shows promise for recurrent brain tumors. Immune checkpoint inhibitors offer a new strategy, despite challenges in clinical development.
Area of Science:
- Neuro-oncology
- Immunology
- Cancer Therapy
Background:
- Glioblastoma is an aggressive primary brain tumor with poor prognosis, often recurring after standard treatment.
- Current therapies, including surgery, radiotherapy, and temozolomide chemotherapy, offer limited survival benefits.
- Targeted therapies have largely failed to improve outcomes in glioblastoma.
Purpose of the Study:
- To review current knowledge on immune checkpoint modulators in glioblastoma.
- To evaluate the potential role of immunotherapy in treating glioblastoma.
- To discuss challenges in the clinical development of glioblastoma immunotherapies.
Main Methods:
- Review of preclinical studies on immune checkpoint modulators.
- Analysis of emerging clinical data for immunotherapy in glioblastoma.
- Discussion of challenges specific to the central nervous system (CNS) immune environment.
Main Results:
- Immunotherapy, particularly with immune checkpoint inhibitors, has shown success in other advanced cancers.
- Preclinical and early clinical data suggest potential for immunotherapy in glioblastoma.
- Specific CNS immune properties and radiological assessment issues pose challenges.
Conclusions:
- Immunotherapy represents a promising avenue for glioblastoma treatment, especially for recurrent disease.
- Overcoming challenges in clinical development is crucial for realizing immunotherapy's potential in glioblastoma.
- Further research is needed to optimize immunotherapy strategies for glioblastoma patients.
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