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Microglia in pediatric brain tumors: The missing link to successful immunotherapy
Aimée du Chatinier1, Irene Querol Velilla1, Michaël Hananja Meel1
1Department of Neuro-oncology, Princess Máxima Center for Paediatric Oncology, Heidelberglaan 25, 3584CS Utrecht, the Netherlands.
Abstract:
Brain tumors are the leading cause of cancer-related mortality in children. Despite the development of immunotherapeutic strategies for adult brain tumors, progress in pediatric neuro-oncology has been hindered by the complex and poorly understood nature of the brain's immune system during early development, a phase that is critical for the onset of many pediatric brain tumors. A defining characteristic of these tumors is the abundance of microglia, the resident immune cells of the central nervous system. In this review, we explore the concept of microglial diversity across brain regions and throughout development and discuss how their maturation stage may contribute to tumor growth in children. We also summarize the current knowledge on the roles of microglia in common pediatric brain tumor entities and provide examples of myeloid-based immunotherapeutic strategies. Our review underscores the importance of microglial plasticity in pediatric brain tumors and its significance for developing effective immunotherapeutic strategies.
Insights
Microglia, the brain's immune cells, show diverse roles in pediatric brain tumors. Understanding their developmental stage is key to developing new myeloid-based immunotherapies for childhood brain cancer.
Area of Science:
- Neuro-oncology
- Immunology
- Developmental Biology
Background:
- Pediatric brain tumors are a leading cause of childhood cancer mortality.
- Progress in pediatric neuro-oncology lags due to the complex brain immune system during development.
- Microglia, the central nervous system's resident immune cells, are abundant in pediatric brain tumors.
Purpose of the Study:
- To explore microglial diversity across brain regions and development in pediatric brain tumors.
- To discuss how microglial maturation influences pediatric brain tumor growth.
- To summarize current knowledge on microglial roles in pediatric brain tumors and potential immunotherapies.
Main Methods:
- Review of current scientific literature on microglia and pediatric brain tumors.
- Analysis of microglial diversity and developmental roles.
- Synthesis of information on myeloid-based immunotherapeutic strategies.
Main Results:
- Microglia exhibit significant diversity based on brain region and developmental stage.
- Microglial maturation stage is a critical factor influencing pediatric brain tumor progression.
- Specific roles of microglia in various pediatric brain tumor types are being elucidated.
Conclusions:
- Microglial plasticity is a crucial factor in pediatric brain tumors.
- Targeting microglia offers promising avenues for novel myeloid-based immunotherapies.
- Further research into microglial development and function is essential for advancing pediatric neuro-oncology.
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