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Author Spotlight: Unlocking Insights into the Immune Cell Landscape of Tumors
Published on: August 18, 2023
Pediatric Solid Cancers: Dissecting the Tumor Microenvironment to Improve the Results of Clinical Immunotherapy
Cristina Belgiovine1,2, Kristiana Mebelli2, Alessandro Raffaele2
1Dipartimento di Scienze Clinico-Chirurgiche, Diagnostiche e Pediatriche, University of Pavia, 27100 Pavia, Italy.
Abstract:
Despite advances in their diagnosis and treatment, pediatric cancers remain among the leading causes of death in childhood. The development of immunotherapies and other forms of targeted therapies has significantly changed the prognosis of some previously incurable cancers in the adult population. However, so far, the results in pediatric cohorts are disappointing, which is mainly due to differences in tumor biology, including extreme heterogeneity and a generally low tumor mutational burden. A central role in the limited efficacy of immunotherapeutic approaches is played by the peculiar characteristics of the tumor microenvironment (TME) in pediatric cancer, with the scarcity of tumor infiltration by T cells and the abundance of stromal cells endowed with lymphocyte suppressor and tumor-growth-promoting activity. Thus, progress in the treatment of pediatric solid tumors will likely be influenced by the ability to modify the TME while delivering novel, more effective therapeutic agents. In this review, we will describe the TME composition in pediatric solid tumors and illustrate recent advances in treatment for the modulation of immune cells belonging to the TME.
Insights
Pediatric cancers show limited response to immunotherapies due to their unique tumor microenvironment (TME). Modifying the TME is key to improving treatment efficacy for these challenging childhood solid tumors.
Area of Science:
- Oncology
- Immunology
- Pediatric Medicine
Background:
- Pediatric cancers are a leading cause of childhood mortality despite treatment advances.
- Immunotherapies have transformed adult cancer care but show limited success in children.
- Differences in tumor biology, including heterogeneity and low tumor mutational burden, contribute to poor outcomes.
Purpose of the Study:
- To review the composition of the tumor microenvironment (TME) in pediatric solid tumors.
- To highlight challenges in applying immunotherapies to pediatric cancers.
- To discuss recent advances in TME modulation for pediatric cancer treatment.
Main Methods:
- Review of existing literature on pediatric cancer TME.
- Analysis of TME characteristics in pediatric solid tumors.
- Examination of immunotherapeutic approaches and their limitations.
Main Results:
- Pediatric TME is characterized by T cell scarcity and abundant suppressor stromal cells.
- These TME features limit the efficacy of current immunotherapies in children.
- Novel therapeutic strategies must address TME modulation for improved outcomes.
Conclusions:
- Modifying the pediatric tumor microenvironment is crucial for effective cancer treatment.
- Targeting immune cells within the TME offers a promising avenue for pediatric solid tumors.
- Further research into TME modulation is essential to improve pediatric cancer survival rates.
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