Cancer-associated fibroblasts induce antigen-specific deletion of CD8 + T Cells to protect tumour cells
Open accessAbstract
Tumours have developed strategies to interfere with most steps required for anti-tumour immune responses. Although many populations contribute to anti-tumour responses, tumour-infiltrating cytotoxic T cells dominate, hence, many suppressive strategies act to inhibit these. Tumour-associated T cells are frequently restricted to stromal zones rather than tumour islands, raising the possibility that the tumour microenvironment, where crosstalk between malignant and “normal” stromal cells exists, may be critical for T cell suppression. We provide evidence of direct interactions between stroma and T cells driving suppression, showing that cancer-associated fibroblasts (CAFs) sample, process and cross-present antigen, killing CD8 + T cells in an antigen-specific, antigen-dependent manner via PD-L2 and FASL. Inhibitory ligand expression is observed in CAFs from human tumours, and neutralisation of PD-L2 or FASL reactivates T cell cytotoxic capacity in vitro and in vivo. Thus, CAFs support T cell suppression within the tumour microenvironment by a mechanism dependent on immune checkpoint activation.
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Antigen cross presentation by CAFs has been observed and may lead to CD4+ T cell activation and suppression of CD8+ T cells.
“More recently, antigen cross presentation by CAFs has been observed117, and this may lead to CD4+ T cell activation and suppression of CD8+ T cells118.”
From A framework for advancing our understanding of cancer-associated fibroblasts (2020) · cites this paper as [118]
Fibroblasts can boost angiogenesis in in vitro assays.
“fibroblasts can boost angiogenesis in in vitro assays, with exciting advances in the development of microfluidic angiogenesis models, and an increasing number of studies have shown how they can alter T cell functionality118,161,162.”
From A framework for advancing our understanding of cancer-associated fibroblasts (2020) · cites this paper as [118]
The Methods describe fibroblast–T-cell co-cultures and collagen-gel contraction assays, but no in vitro angiogenesis assay or finding that fibroblasts boost angiogenesis (searched: angiogenesis, vascular sprouting, and tube formation). The Discussion instead supports the sentence’s later, citation-adjacent point that fibroblasts alter T-cell function. (LLM, conf=0.76)
Experimental — accuracy not yet measuredCAFs show characteristics of activated fibroblasts and/or myofibroblasts, consistent with the chronic inflammation and mechanical tension in tumors.
“CAFs show characteristics of activated fibroblasts and/or myofibroblasts, consistent with the chronic inflammation and mechanical tension in tumors12,233,234.”
From TGFβ biology in cancer progression and immunotherapy (2021) · cites this paper as [234]
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“One of the underlying mechanisms was the upregulation of FAS/FASL and PD-1/PDL2 on CD8+ T cells and CAFs, respectively, which drives the dysfunction of tumor-specific CD8+ T cells (Lakins et al., 2018).”
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- Authors
- Lakins, M. A., Ghorani, E., Munir, H., Martins, C. P., & Shields, J. D.
- Affiliations
- University of Cambridge (GB)
- Corresponding author
- Shields, Jacqueline D.
- Venue
- Nature Communications
- Published
- 2018-03-05
- Volume
- 9
- Issue
- 1
- Pages
- 948-948
- ISSN
- 2041-1723 (ISSN-L)
- PMC
- PMC5838096
- OpenAlex
- W2790543400
- Cited by
- 578
- References
- 36
- Citations by year
- 2026: 43 · 2025: 79 · 2024: 77 · 2023: 93 · 2022: 83 · 2021: 70 · 2020: 67 · 2019: 45 · 2018: 21
- FWCI
- 19.03
- Type
- journal article
- Language
- en
- Open access
- gold
- doi.org
- Locations
- Nature Communications (publishedVersion, cc-by)
- PubMed Central (publishedVersion, cc-by)
- PubMed (publishedVersion)
- Repository@Nottingham (University of Nottingham) (publishedVersion, other-oa)
- Repository@Nottingham (University of Nottingham) (submittedVersion, cc-by)
- RePEc: Research Papers in Economics (submittedVersion)
- DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion)
- DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
- UCL Discovery (University College London) (submittedVersion)
- Apollo (University of Cambridge) (submittedVersion, cc-by)
- Apollo (cc-by)
- Funders
- Medical Research Council (MC_UU_12022/5, MC_UU_12022/4)
- Cambridge Institute for Medical Research, University of Cambridge
- Topics
- Health Sciences › Medicine › Oncology › Cancer Immunotherapy and Biomarkers
- Life Sciences › Immunology and Microbiology › Immunology › Immunotherapy and Immune Responses
- Life Sciences › Immunology and Microbiology › Immunology › T-cell and B-cell Immunology
- Keywords
- cancer-associated fibroblasts, CD8+ T cell suppression, tumor microenvironment, cross-presentation, PD-L2, Fas ligand, immune checkpoint, tumor stroma, T cell cytotoxicity, tumor immunosuppression
- MeSH terms
- Cancer-Associated Fibroblasts, Animals, Antigens, Neoplasm, Cell Survival, Cytotoxicity, Immunologic, Female, Mice, Inbred C57BL, CD8-Positive T-Lymphocytes, Cytoprotection, Cross-Priming, Fas Ligand Protein, Proteolysis, Programmed Cell Death 1 Ligand 2 Protein
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