Cited by 374Cancer Immunotherapy and BiomarkersGenetic factors in colorectal cancerColorectal Cancer Treatments and Studies

The Microsatellite Instable Subset of Colorectal Cancer Is a Particularly Good Candidate for Checkpoint Blockade Immunotherapy

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Xiao, Yanping, Freeman, Gordon J.·2015·Cancer Discovery

Abstract

Summary: The microsatellite instable (MSI) subset of colorectal cancer exhibits an active Th1/CTL immune microenvironment, probably due to recognition of a high number of tumor neoantigens. However, the high expression of checkpoint molecules PD-1, PD-L1, CTLA-4, LAG-3, and IDO in MSI colorectal cancer distinguishes MSI from microsatellite stable colorectal cancer and creates an immunosuppressive microenvironment that may help MSI tumors evade immune destruction by the infiltrating immune cells. Though colorectal cancer does not have a good response rate to PD-1 pathway immunotherapy, these results suggest that the MSI subset of colorectal cancer is a particularly good candidate for checkpoint immunotherapy. Cancer Discov; 5(1); 16–8. ©2015 AACR. See related article by Llosa et al., p. 43

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Crossref · 10.1158/2159-8290.cd-14-1397

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  • MSI tumors have significant benefit from immune checkpoint blockade therapy, anti-PD1/PDL1.

    “It has also shown significant benefit from immune checkpoint blockade therapy, anti-PD1/PDL1 (refs. 9,10).”

    From A tumor microenvironment-specific gene expression signature predicts chemotherapy resistance in colorectal cancer patients (2021) · cites this paper as [9]

    The Abstract identifies MSI colorectal cancer as a promising candidate for checkpoint immunotherapy, but it does not report significant clinical benefit in MSI tumors. It says colorectal cancer had responded poorly to PD-1/PD-L1 blockade in earlier trials and that trials specifically testing PD-1 blockade in MSI patients had only been initiated. The reported durable efficacy was in melanoma, renal cancer, and non-small cell lung cancer. (LLM, conf=0.88)

    Experimental — accuracy not yet measured
  • Increasing evidence suggested that MSI tumors were responsive to immunotherapy of anti-PD1/PDL1.

    “Moreover, increasing evidence suggested that MSI tumors were responsive to immunotherapy of anti-PD1/PDL19,10.”

    From A tumor microenvironment-specific gene expression signature predicts chemotherapy resistance in colorectal cancer patients (2021) · cites this paper as [9]

    The Abstract says MSI colorectal tumors are particularly good candidates for checkpoint immunotherapy, based on their immune microenvironment. It does not report that MSI tumors responded to anti-PD-1 or anti-PD-L1 treatment; it says PD-1 blockade trials in MSI patients had been initiated and that colorectal cancer overall had responded poorly in earlier trials. (LLM, conf=0.86)

    Experimental — accuracy not yet measured

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Research works printed but not linked: 1

  1. [1]Smyrk TC Watson P Kaul K Lynch HT Tumor-infiltrating lymphocytes are a marker for microsatellite instability in colorectal carcinoma Cancer 2001 91 2417 22 11413533

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Authors
Xiao, Y., & Freeman, G. J.
Affiliations
Harvard University (US)
Corresponding author
Freeman, Gordon J.
Venue
Cancer Discovery
Published
2015-01-01
Volume
5
Issue
1
Pages
16-18
ISSN
  • 2159-8274 (ISSN-L)
  • 2159-8290
OpenAlex
W2042797183
Cited by
368
References
11
Citations by year
2026: 5 · 2025: 13 · 2024: 17 · 2023: 26 · 2022: 54 · 2021: 44 · 2020: 36 · 2019: 46 · 2018: 35 · 2017: 40 · 2016: 37 · 2015: 14
FWCI
18.34
Type
journal article
Language
en
Open access
Locations
  • Cancer Discovery (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • U.S. Public Health Service (HHSN272201100018C)
  • National Cancer Institute (U54CA163125, P50CA101942)
  • National Institute of Allergy and Infectious Diseases (HHSN272201100018C, P01AI056299)
Topics
  • Health Sciences › Medicine › Oncology › Cancer Immunotherapy and Biomarkers
  • Health Sciences › Medicine › Pathology and Forensic Medicine › Genetic factors in colorectal cancer
  • Health Sciences › Medicine › Oncology › Colorectal Cancer Treatments and Studies
Keywords
microsatellite instability, colorectal cancer, immune checkpoint blockade, PD-1, PD-L1, CTLA-4, LAG-3, IDO, tumor immune microenvironment, neoantigens, immunosuppression, immunotherapy response
MeSH terms
Colonic Neoplasms, Humans, Microsatellite Instability, Tumor Microenvironment, Cell Cycle Checkpoints

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