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Glioma Induction by Intracerebral Retrovirus Injection
Ravinder K Verma1, Fanghui Lu1, Qing Richard Lu1
1Division of Experimental Hematology and Cancer Biology, Brain Tumor Center, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA.
Abstract:
Glioblastoma (GBM) is the most common primary brain cancer in adults and has a poor prognosis. It is characterized by a high degree of cellular infiltration that leads to tumor recurrence, atypical hyperplasia, necrosis, and angiogenesis. Despite aggressive treatment modalities, current therapies are ineffective for GBM. Mouse GBM models not only provide a better understanding in the mechanisms of gliomagenesis, but also facilitate the drug discovery for treating this deadly cancer. A retroviral vector system that expresses PDGFBB (Platelet-derived growth factor BB) and inactivates PTEN (Phosphatase and tensin homolog) and P53 tumor suppressors provides a rapid and efficient induction of glioma in mice with full penetrance. In this protocol, we describe a simple and practical method for inducing GBM formation by retrovirus injection in the murine brain. This system gives a spatial and temporal control over the induction of glioma and allows the assessment of therapeutic effects with a bioluminescent reporter.
Insights
This study introduces a new method for creating mouse models of glioblastoma (GBM), a deadly brain cancer. This approach aids in understanding GBM development and discovering new treatments.
Area of Science:
- Neuro-oncology
- Cancer Biology
- Genetics
Background:
- Glioblastoma (GBM) is the most aggressive primary brain tumor in adults, characterized by invasive growth and poor patient outcomes.
- Current therapeutic strategies for GBM demonstrate limited efficacy, highlighting the need for improved treatment options.
- Developing reliable preclinical models is crucial for advancing our understanding of GBM pathogenesis and facilitating drug discovery.
Purpose of the Study:
- To present a practical and efficient protocol for inducing glioblastoma formation in mice.
- To establish a controllable murine model for studying glioma development and evaluating therapeutic interventions.
- To utilize a bioluminescent reporter system for monitoring glioma progression and treatment response.
Main Methods:
- Induction of GBM in mice via retroviral vector injection into the brain.
- The retroviral system expresses PDGFBB and inactivates the PTEN and P53 tumor suppressor genes.
- Employing a bioluminescent reporter for spatial and temporal control and assessment of therapeutic effects.
Main Results:
- The described retroviral system enables rapid and highly penetrant induction of glioma in mice.
- This method provides precise spatial and temporal control over glioma development.
- The model allows for effective assessment of therapeutic interventions through bioluminescence imaging.
Conclusions:
- This protocol offers a valuable tool for generating genetically defined mouse models of glioblastoma.
- The developed system facilitates the study of gliomagenesis mechanisms and the preclinical evaluation of novel GBM therapies.
- The controllable and efficient nature of this model system holds significant promise for advancing GBM research and drug development.
