Cited by 297Cancer Immunotherapy and BiomarkersImmunotherapy and Immune ResponsesT-cell and B-cell Immunology

Blockade of PD‐L1 (B7‐H1) augments human tumor‐specific T cell responses in vitro

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Blank, Christian, Kuball, Juergen, Voelkl, Simon, Wiendl, Heinz, Becker, Bernd, Walter, Bernhard, Majdic, Otto, Gajewski, Thomas F. +3 more·2006·International Journal of Cancer

Abstract

Human tumors frequently escape immune destruction, despite the presence of cyototoxic T cells (CTL) recognizing tumor‐associated antigens (TAA). We have previously shown that programmed death ligand‐1 (PD‐L1), a recently identified ligand of the B7 superfamily, is expressed on murine tumors and can inhibit antitumor immune responses. To evaluate the clinical relevance of our animal model findings, we examined human tumors and tumor‐specific T cells. We found PD‐L1 to be constitutively expressed on human renal cell carcinoma (RCC) cell lines and upregulated on human melanoma cell lines upon exposure to interferon‐gamma. Similarly, we found binding of anti‐PD‐L1 monoclonal antibody (mAb) on frozen sections from RCC and melanomas, but not on normal tissues. The corresponding inhibitory receptor of PD‐L1, PD‐1, revealed a higher expression on tumor‐infiltrating lymphocytes than on peripheral blood lymphocytes (PBL) from melanoma patients upon specific antigen stimulation. Stimulation of PBL from healthy donors with peptide‐loaded dendritic cells in the presence of anti‐PD‐L1 mAb altered neither the total T cell numbers after expansion, nor the percentage of peptide‐specific CTL, when providing a T cell help by addition of cytokines. However, when stimulating TAA‐specific CTL and T helper cells with Ag‐pulsed dendritic cells in the absence of exogenous cytokines, PD‐L1 blockade increased the cytokine production. Similar to the data achieved in the murine system, the blockade of PD‐L1 on human tumors resulted in enhanced cytolytic activity of TAA‐specific CTLs and cytokine production of TAA‐specific T helper cells when interacting directly with the tumor. In summary, our data suggest that PD‐L1/PD‐1 interactions negatively regulate T cell effector functions predominately in the absence of exogenous cytokine support, indicating an important role for this pathway in tumor evasion. © 2006 Wiley‐Liss, Inc.

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  • In animal models, introducing B7-1 into tumors or blocking inhibitory B7 family members reduces tumor growth or causes spontaneous tumor rejection.

    “Animal model studies have shown that introduction of B7-1 into tumors by transfection or blockade of inhibitory B7 family members can reduce tumor growth or result in spontaneous tumor rejection in vivo [7–13].”

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Research works printed but not linked: 4

  1. Carter L, Fouser LA, Jussif J, Fitz L, Deng B, Wood CR, Collins M, Honjo T, Freeman GJ, Carreno BM. PD-1:PD-L inhibitory pathway affects both CD4(1) and CD8(1) T cells and is overcome by IL-2. Eur J Immunol 2002;32:634-43.
  2. Mackensen A, Herbst B, Chen JL, Kohler G, Noppen C, Herr W, Spagnoli GC, Cerundolo V, Lindemann A. Phase I study in melanoma patients of a vaccine with peptide-pulsed dendritic cells generated in vitro from CD34(1) hematopoietic progenitor cells. Int J Cancer 2000;86:385-92.
  3. Thompson JA, Figlin RA, Sifri-Steele C, Berenson RJ, Frohlich MW. A phase I trial of CD3/CD28-activated T cells (Xcellerated T cells) and interleukin-2 in patients with metastatic renal cell carcinoma. Clin Cancer Res 2003;9:3562-70.
  4. Elsasser-Beile U, Przytulski B, Gierschner D, Grussenmeyer T, Katzenwadel A, Leiber C, Deckart A, Wetterauer U. Comparison of the activation status of tumor infiltrating and peripheral lymphocytes of patients with adenocarcinomas and benign hyperplasia of the pros- tate. Prostate 2000;45:1-7.

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Authors
Blank, C., Kuball, J., Voelkl, S., Wiendl, H., Becker, B., Walter, B., Majdic, O., Gajewski, T. F., Theobald, M., Andreesen, R., & Mackensen, A.
Affiliations
  • University of Regensburg (DE)
  • University of Würzburg (DE)
  • University of Vienna (AT)
  • University of Chicago (US)
  • Johannes Gutenberg University Mainz (DE)
Corresponding author
Blank, Christian
Venue
International Journal of Cancer
Publisher
Wiley
Published
2006-04-27
Volume
119
Issue
2
Pages
317-327
ISSN
  • 0020-7136 (ISSN-L)
  • 1097-0215
OpenAlex
W2039427849
Cited by
297
References
81
Citations by year
2026: 3 · 2025: 7 · 2024: 8 · 2023: 10 · 2022: 10 · 2021: 15 · 2020: 7 · 2019: 12 · 2018: 13 · 2017: 23 · 2016: 21 · 2015: 21 · 2014: 22 · 2013: 21 · 2012: 19
FWCI
9.19
Type
journal article
Language
en
Open access
Locations
  • International Journal of Cancer (publishedVersion)
  • PubMed (publishedVersion)
  • University of Regensburg Publication Server (University of Regensburg) (acceptedVersion)
  • University of Regensburg Publication Server (University of Regensburg)
Funders
  • Deutsche Forschungsgemeinschaft (SFB 432)
  • José Carreras Leukämie-Stiftung
  • Deutsche Krebshilfe
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
PD-L1, PD-1, immune checkpoint blockade, tumor-specific T cell responses, cytotoxic T lymphocytes, tumor-associated antigens, renal cell carcinoma, melanoma, interferon-gamma, tumor-infiltrating lymphocytes, dendritic cell activation, cytokine production, tumor immune evasion, anti-PD-L1 monoclonal antibody
MeSH terms
Antibodies, Monoclonal, Antigens, Differentiation, Antineoplastic Agents, Carcinoma, Renal Cell, Flow Cytometry, Humans, Immunohistochemistry, Kidney Neoplasms, Melanoma, T-Lymphocytes, Cytotoxic, Tumor Cells, Cultured, Antigens, CD, Up-Regulation, Gene Expression Regulation, Neoplastic, B7-1 Antigen, B7-H1 Antigen, CTLA-4 Antigen

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