Cited by 53Cancer Immunotherapy and BiomarkersImmune cells in cancerT-cell and B-cell Immunology

IL-17–induced HIF1α drives resistance to anti–PD-L1 via fibroblast-mediated immune exclusion

Open access
Chen, Xing, Zhao, Junjie, Herjan, Tomasz, Hong, Lingzi, Liao, Yun, Liu, Caini, Vasu, Kommireddy, Wang, Han +5 more·2022·Journal of Experimental Medicine

Abstract

Increasing evidence suggests that intratumoral inflammation has an outsized influence on antitumor immunity. Here, we report that IL-17, a proinflammatory cytokine widely associated with poor prognosis in solid tumors, drives the therapeutic failure of anti–PD-L1. By timing the deletion of IL-17 signaling specifically in cancer-associated fibroblasts (CAFs) in late-stage tumors, we show that IL-17 signaling drives immune exclusion by activating a collagen deposition program in murine models of cutaneous squamous cell carcinoma (cSCC). Ablation of IL-17 signaling in CAFs increased the infiltration of cytotoxic T cells into the tumor mass and sensitized otherwise resistant cSCC to anti–PD-L1 treatment. Mechanistically, the collagen deposition program in CAFs was driven by IL-17–induced translation of HIF1α, which was mediated by direct binding of Act1, the adaptor protein of IL-17 receptor, to a stem-loop structure in the 3′ untranslated region (UTR) in Hif1α mRNA. Disruption of Act1’s binding to Hif1α mRNA abolished IL-17–induced collagen deposition and enhanced anti–PD-L1–mediated tumor regression.

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  • Hypoxia can directly upregulate expression of various cellular immune checkpoints, such as PD-L1, in the tumor microenvironment.

    “Hypoxia can directly upregulate the expression of various cellular immune checkpoints (such as programmed cell death‐ligand 1, PD‐L1) in the TME.”

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Authors
Chen, X., Zhao, J., Herjan, T., Hong, L., Liao, Y., Liu, C., Vasu, K., Wang, H., Thompson, A., Fox, P. L., Gastman, B. R., Li, X., & Li, X.
Affiliations
  • Cleveland Clinic (US)
  • Case Western Reserve University (US)
Corresponding author
Li, Xiao
Venue
Journal of Experimental Medicine
Published
2022-04-07
Volume
219
Issue
6
ISSN
  • 0022-1007 (ISSN-L)
  • 1540-9538
OpenAlex
W4223568730
Cited by
53
References
62
Citations by year
2026: 11 · 2025: 8 · 2024: 12 · 2023: 13 · 2022: 9
FWCI
4.39
Type
journal article
Language
en
Open access
Locations
  • The Journal of Experimental Medicine (publishedVersion, cc-by-nc-sa)
  • PubMed Central (publishedVersion, cc-by-nc-sa)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health (5P01CA062220, 5P01 HL103453, 1R01HL144497-01A1)
  • Paul Fox Endowed Chair
  • Case Western Reserve University
Topics
  • Health Sciences › Medicine › Oncology › Cancer Immunotherapy and Biomarkers
  • Life Sciences › Immunology and Microbiology › Immunology › Immune cells in cancer
  • Life Sciences › Immunology and Microbiology › Immunology › T-cell and B-cell Immunology
Keywords
IL-17, HIF-1α, anti-PD-L1 resistance, cancer-associated fibroblasts, immune exclusion, collagen deposition, cutaneous squamous cell carcinoma, Act1, 3' untranslated region, mRNA translation, antitumor immunity, cytotoxic T cell infiltration
MeSH terms
Cancer-Associated Fibroblasts, Animals, Carcinoma, Squamous Cell, RNA, Messenger, Skin Neoplasms, Interleukin-17, Cell Line, Tumor, Mice, Hypoxia-Inducible Factor 1, alpha Subunit, B7-H1 Antigen

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