Cited by 676Cancer Immunotherapy and BiomarkersImmune cells in cancerImmunotherapy and Immune Responses

Eradication of metastatic mouse cancers resistant to immune checkpoint blockade by suppression of myeloid-derived cells

Open access
Kim, KiBem, Skora, Andrew D., Li, Zhaobo, Liu, Qiang, Tam, Ada J., Blosser, Richard L., Diaz, Luis A., Papadopoulos, Nickolas +3 more·2014·Proceedings of the National Academy of Sciences

Abstract

Significance: Recent clinical trials have shown highly promising responses in a subset of patients treated with immune checkpoint inhibitory anti–programmed cell death-1, anti–programmed cell death ligand-1, and anti–cytotoxic T-lymphocyte-associated antigen-4 antibodies, but the majority of patients in these trials remained unresponsive. Our results show that elevated myeloid-derived suppressor cells(MDSCs) are responsible for the resistance and that elimination of MDSCs can lead to cures of experimental, metastatic tumors.

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Crossref · 10.1073/pnas.1410626111

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  • Anti-PD1 therapy was ineffective in the 4T1 model.

    “anti-PD1 therapy was ineffective, as reported before29”

    From Inhibition of PCSK9 potentiates immune checkpoint therapy for cancer (2020) · cites this paper as [29]

    The Effects of Immune Checkpoint Blockade section describes 4T1 tumors as resistant to immunotherapy, and the Discussion says combined anti-PD-1/anti-CTLA-4 treatment generally could not cure them. The copy does not explicitly report the outcome of anti-PD-1 alone in 4T1 mice; moreover, 3 of 10 mice had complete primary-tumor regression with the combination, so “ineffective” needs qualification. (LLM, conf=0.79)

    Experimental — accuracy not yet measured
  • HDAC inhibitors changed immunogenicity and enhanced antitumor immunity via decreasing MDSC ratio and upregulating MHC-I/II, CD40, CD80, and CD86 expression.

    “Beyond direct cytotoxicity, histone deacetylases (HDAC) inhibitors changed immunogenicity and enhanced antitumor immunity, via decreasing MDSC ratio and upregulating MHC-I/II, CD40, CD80, and CD86 expression [326–328].”

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Authors
Kim, K., Skora, A. D., Li, Z., Liu, Q., Tam, A. J., Blosser, R. L., Diaz, L. A., Papadopoulos, N., Kinzler, K. W., Vogelstein, B., & Zhou, S.
Affiliations
  • Sidney Kimmel Comprehensive Cancer Center (US)
  • Flow Cytometry Core Facility (CH)
  • Howard Hughes Medical Institute (US)
Venue
Proceedings of the National Academy of Sciences
Published
2014-07-28
Volume
111
Issue
32
Pages
11774-11779
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
OpenAlex
W2026861011
Cited by
676
References
36
Citations by year
2026: 26 · 2025: 37 · 2024: 55 · 2023: 59 · 2022: 69 · 2021: 79 · 2020: 89 · 2019: 67 · 2018: 55 · 2017: 74 · 2016: 44 · 2015: 19
FWCI
22.06
Type
journal article
Language
en
Open access
Locations
  • Proceedings of the National Academy of Sciences (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Howard Hughes Medical Institute
  • National Institutes of Health (CA062924, CA043460)
  • National Cancer Institute (R37CA043460, CA 043460, P50CA062924, CA062924)
  • National Institute of General Medical Sciences (T32GM007309)
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 › Immunotherapy and Immune Responses
Keywords
immune checkpoint blockade, myeloid-derived suppressor cells, PD-1, CTLA-4, epigenetic regulators, PI3K inhibitors, metastatic breast cancer, 4T1 tumor, CT26 cells, tumor immunogenicity, combination immunotherapy, mouse tumor model
MeSH terms
Phosphoinositide-3 Kinase Inhibitors, Animals, Antibodies, Monoclonal, Azacitidine, Benzamides, Combined Modality Therapy, Female, Humans, Immunotherapy, Mammary Neoplasms, Experimental, Mice, Inbred BALB C, Neoplasm Metastasis, Pyridines, Colorectal Neoplasms, Myeloid Cells, Epigenesis, Genetic, Cell Line, Tumor, Mice, Histone Deacetylase Inhibitors, CTLA-4 Antigen, Programmed Cell Death 1 Receptor

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