The EACR’s ‘Highlights in Cancer Research’ is a regular summary of the most interesting and impactful recent papers in cancer research, curated by the Board of the European Association for Cancer Research (EACR).
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Varveri, A. et al. Nature Communications. 15: 4988 (2024).
doi: 10.1038/s41467-024-49282-1.
Summary of the findings
Summary of the findingsCancer-associated fibroblasts (CAFs) orchestrate an immunosuppressive tumour microenvironment (TME), significantly contributing to tumorigenesis and progression. In the article by Varveri et al, the authors identified α-SMA+ CAFs to be capable of processing and presenting tumour-associated antigens on T regulatory cells, through the formation of immunological synapses. These led to Treg cell activation and enhanced Treg-mediated immune suppression within the TME. Importantly, CAFs exhibited heightened autophagic activity which not only sustains them but also facilitated antigen-specific Treg activation. This process resulted in an amplified immunosuppressive milieu, promoting tumor immune evasion.
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Future impact
This study demonstrates the role of CAF-derived autophagy in potentiating Treg activation, indicating that immune synapses formed between CAFs and Treg cells contribute significantly to the immunosuppressive environment within the TME. The results highlight the potential of targeting autophagy within CAFs as a therapeutic strategy to disrupt their ability to activate Tregs, thereby restoring immune surveillance and enhancing the response to immunotherapy. Thus, the clinical implications of the findings could represent a paradigm shift in cancer treatment, offering new strategies to overcome tumour resistance and improve patient outcomes.
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