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Checkpoint Inhibition in Head and Neck Cancer: Immune Therapeutic Options, Limitations, and Beyond
Bastian Höchst1, Percy A Knolle
1Institute of Molecular Immunology and Experimental Oncology, Klinikum München rechts der Isar, Technische Universität München, Munich, Germany.
Abstract:
The immune system functions to defend the organism against infectious microorganisms but also against transformed cells. This key role of the immune system, in particular cancer-specific T cells, in eliminating cancer cells is compromised by various immune escape strategies employed by cancer cells and the cancer microenvironment. Here, we review the current knowledge about the immune escape mechanisms of cancer and the attempts to reconstitute cancer-specific immunity by using checkpoint inhibitors in head and neck squamous cell carcinoma. We discuss the different options of immune therapy based on a mechanistic understanding of the relevance of co-inhibitory signaling, regulatory T cells, and myeloid-derived suppressor cells. A thorough mechanistic understanding of cancer immune escape mechanisms and their presence in the individual patient is required in order to design effective multicomponent immune therapies in the future.
Insights
Cancer cells evade the immune system using various strategies. This review explores immune escape mechanisms and immunotherapy options like checkpoint inhibitors for head and neck cancers.
Area of Science:
- Immunology
- Oncology
- Cancer Research
Background:
- The immune system protects against pathogens and transformed cells.
- Cancer cells and their microenvironment employ immune escape strategies.
- This compromises the immune system's ability to eliminate cancer cells, particularly cancer-specific T cells.
Purpose of the Study:
- To review current knowledge on cancer immune escape mechanisms.
- To discuss immunotherapy approaches, specifically checkpoint inhibitors, for head and neck squamous cell carcinoma.
- To explore immune therapy options based on co-inhibitory signaling, regulatory T cells, and myeloid-derived suppressor cells.
Main Methods:
- Literature review of cancer immune escape mechanisms.
- Analysis of immunotherapy strategies for head and neck squamous cell carcinoma.
- Discussion of mechanistic insights into immune regulation in cancer.
Main Results:
- Cancer immune escape is a significant challenge in oncology.
- Checkpoint inhibitors offer a promising avenue for reconstituting anti-cancer immunity.
- Understanding regulatory T cells and myeloid-derived suppressor cells is crucial for effective immunotherapy.
Conclusions:
- Effective cancer immunotherapy requires a deep understanding of immune escape mechanisms.
- Multicomponent immune therapies tailored to individual patients are needed for future cancer treatment.
- Targeting co-inhibitory signaling pathways can enhance anti-tumor immune responses.
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