Cited by 1,033Cancer Immunotherapy and BiomarkersT-cell and B-cell ImmunologyImmunotherapy and Immune Responses

Cholesterol Induces CD8+ T Cell Exhaustion in the Tumor Microenvironment

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Ma, Xingzhe, Bi, Enguang, Lu, Yong, Su, Pan, Huang, Chunjian, Liu, Lintao, Wang, Qiang, Yang, Maojie +7 more·2019·Cell Metabolism

Abstract

Tumor-infiltrating T cells often lose their effector function; however, the mechanisms are incompletely understood. We report that cholesterol in the tumor microenvironment induces CD8+ T cell expression of immune checkpoints and exhaustion. Tumor tissues enriched with cholesterol and cholesterol content in tumor-infiltrating CD8+ T cells were positively and progressively associated with upregulated T cell expression of PD-1, 2B4, TIM-3, and LAG-3. Adoptively transferred CD8+ T cells acquired cholesterol, expressed high levels of immune checkpoints, and became exhausted upon entering a tumor. Tumor culture supernatant or cholesterol induced immune checkpoint expression by increasing endoplasmic reticulum (ER) stress in CD8+ T cells. Consequently, the ER stress sensor XBP1 was activated and regulated PD-1 and 2B4 transcription. Inhibiting XBP1 or reducing cholesterol in CD8+ T cells effectively restored antitumor activity. This study reveals a mechanism underlying T cell exhaustion and suggests a new strategy for restoring T cell function by reducing cholesterol to enhance T cell-based immunotherapy.

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Crossref · 10.1016/j.cmet.2019.04.002

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  • Both oxidative and ER stress have been shown to contribute to T cell dysfunction across different tumor types.

    “Even though both oxidative and ER stress have been shown to contribute to T cell dysfunction across different tumor types (44-51),”

    From Bile acid synthesis impedes tumor-specific T cell responses during liver cancer (2025) · cites this paper as [44]

    The Discussion and Limitations of Study report that cholesterol-induced ER stress contributes to tumor-infiltrating CD8+ T-cell exhaustion. The cited paper supports the ER-stress part of the sentence, but the passages do not establish a contribution from oxidative stress across different tumor types. (LLM, conf=0.85)

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Authors
Ma, X., Bi, E., Lu, Y., Su, P., Huang, C., Liu, L., Wang, Q., Yang, M., Kalady, M. F., Qian, J., Zhang, A., Gupte, A. A., Hamilton, D. J., Zheng, C., & Yi, Q.
Affiliations
  • Houston Methodist (US)
  • Wake Forest University Health Sciences (US)
  • Cleveland Clinic (US)
  • Houston Methodist Research Institute (US)
  • Second Hospital of Shandong University (CN)
Corresponding author
Yi, Qing
Venue
Cell Metabolism
Publisher
Elsevier BV
Published
2019-07
Volume
30
Issue
1
Pages
143-156.e5
ISSN
1550-4131 (ISSN-L)
OpenAlex
W2941036215
Cited by
1,033
References
45
Citations by year
2026: 176 · 2025: 204 · 2024: 187 · 2023: 169 · 2022: 136 · 2021: 100 · 2020: 47 · 2019: 12 · 2013: 1
FWCI
31.24
Type
journal article
Language
en
Open access
Locations
  • Cell Metabolism (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
National Institutes of Health
Topics
  • Health Sciences › Medicine › Oncology › Cancer Immunotherapy and Biomarkers
  • Life Sciences › Immunology and Microbiology › Immunology › T-cell and B-cell Immunology
  • Life Sciences › Immunology and Microbiology › Immunology › Immunotherapy and Immune Responses
Keywords
cholesterol, CD8+ T cell exhaustion, tumor microenvironment, immune checkpoint, PD-1, 2B4, TIM-3, LAG-3, endoplasmic reticulum stress, XBP1, adoptive T cell therapy, antitumor immunity, cholesterol metabolism
MeSH terms
Animals, Cholesterol, Flow Cytometry, Humans, Immunotherapy, Melanoma, Experimental, Blotting, Western, CD8-Positive T-Lymphocytes, Immunoprecipitation, Mice, Tumor Microenvironment, Real-Time Polymerase Chain Reaction, Programmed Cell Death 1 Receptor

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