Cited by 129Cancer Immunotherapy and BiomarkersIntraperitoneal and Appendiceal MalignanciesColorectal Cancer Treatments and Studies

Ascites and resistance to immune checkpoint inhibition in dMMR/MSI-H metastatic colorectal and gastric cancers

Open access
Fucà, Giovanni, Cohen, Romain, Lonardi, Sara, Shitara, Kohei, Elez, Maria Elena, Fakih, Marwan, Chao, Joseph, Klempner, Samuel J +23 more·2022·Journal for ImmunoTherapy of Cancer

Abstract

Background: Despite unprecedented benefit from immune checkpoint inhibitors (ICIs) in patients with mismatch repair deficient (dMMR)/microsatellite instability high (MSI-H) advanced gastrointestinal cancers, a relevant proportion of patients shows primary resistance or short-term disease control. Since malignant effusions represent an immune-suppressed niche, we investigated whether peritoneal involvement with or without ascites is a poor prognostic factor in patients with dMMR/MSI-H metastatic colorectal cancer (mCRC) and gastric cancer (mGC) receiving ICIs. Methods: We conducted a global multicohort study at Tertiary Cancer Centers and collected clinic-pathological data from a cohort of patients with dMMR/MSI-H mCRC treated with anti-PD-(L)1 ±anti-CTLA-4 agents at 12 institutions (developing set). A cohort of patients with dMMR/MSI-high mGC treated with anti-PD-1 agents±chemotherapy at five institutions was used as validating dataset. Results: The mCRC cohort included 502 patients. After a median follow-up of 31.2 months, patients without peritoneal metastases and those with peritoneal metastases and no ascites had similar outcomes (adjusted HR (aHR) 1.15, 95% CI 0.85 to 1.56 for progression-free survival (PFS); aHR 0.96, 95% CI 0.65 to 1.42 for overall survival (OS)), whereas inferior outcomes were observed in patients with peritoneal metastases and ascites (aHR 2.90, 95% CI 1.70 to 4.94; aHR 3.33, 95% CI 1.88 to 5.91) compared with patients without peritoneal involvement. The mGC cohort included 59 patients. After a median follow-up of 17.4 months, inferior PFS and OS were reported in patients with peritoneal metastases and ascites (aHR 3.83, 95% CI 1.68 to 8.72; aHR 3.44, 95% CI 1.39 to 8.53, respectively), but not in patients with only peritoneal metastases (aHR 1.87, 95% CI 0.64 to 5.46; aHR 2.15, 95% CI 0.64 to 7.27) when compared with patients without peritoneal involvement. Conclusions: Patients with dMMR/MSI-H gastrointestinal cancers with peritoneal metastases and ascites should be considered as a peculiar subgroup with highly unfavorable outcomes to current ICI-based therapies. Novel strategies to target the immune-suppressive niche in malignant effusions should be investigated, as well as next-generation ICIs or intraperitoneal approaches.

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.1136/jitc-2021-004001

Cites

33 of 33 references verified0 citation errors · 0 not checkable

Statistics

Claims the paper makes

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

  • The association between peritoneal metastases/ascites and poorer outcomes in dMMR/MSI-H mCRC treated with ICIs has been attributed to the presence of an immune-suppressive environment within serous cavities, potentially hindering the efficacy of immunotherapy.

    “This association has been attributed to the presence of an immune-suppressive environment within serous cavities, potentially hindering the efficacy of immunotherapy [165].”
  • In a cohort of 502 patients with dMMR/MSI-H mCRC treated with ICIs, the presence of peritoneal metastases and ascites correlated with poorer outcomes.

    “Their findings revealed that the presence of peritoneal metastases and ascites correlated with poorer outcomes in a cohort of 502 patients with dMMR/MSI-H mCRC treated with ICIs.”

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

The self-check needs the paper’s full text.

Cites

Flagged first, then by citations

Cited by

Sorted by citations

Authors
Fucà, G., Cohen, R., Lonardi, S., Shitara, K., Elez, M. E., Fakih, M., Chao, J., Klempner, S. J., Emmett, M., Jayachandran, P., Bergamo, F., García, M. D., Mazzoli, G., Provenzano, L., Colle, R., Svrcek, M., Ambrosini, M., Randon, G., Shah, A. T., Salati, M., Fenocchio, E., Salvatore, L., Chida, K., Kawazoe, A., Conca, V., Curigliano, G., Corti, F., Cremolini, C., Overman, M., Andre, T., & Pietrantonio, F.
Affiliations
  • Fondazione IRCCS Istituto Nazionale dei Tumori (IT)
  • Inserm (FR)
  • Istituto Oncologico Veneto (IT)
  • National Cancer Center Hospital East (JP)
  • Department of Medical Oncology, Vall d'Hebron Barcelona Hospital Campus, Vall d'Hebron Institute of Oncology (VHIO), Universitat Autonoma de Barcelona, Barcelona, Spain
  • City Of Hope National Medical Center (US)
  • Harvard University (US)
  • University of Southern California (US)
  • Universitat Autònoma de Barcelona (ES)
  • Sorbonne Université, Department of Medical Oncology, Hôpital Saint-Antoine, AP-HP and INSERM, Unité Mixte de Recherche Scientifique 938, Centre de Recherche Saint-Antoine, Equipe Instabilité des Microsatellites et Cancer, Equipe labellisée par la Ligue Nationale contre le Cancer, Paris, France
  • Baylor College of Medicine (US)
  • University of Modena and Reggio Emilia (IT)
  • Candiolo Cancer Institute (IT)
  • Agostino Gemelli University Polyclinic (IT)
  • University of Pisa (IT)
  • University of Milan (IT)
  • The University of Texas MD Anderson Cancer Center (US)
Corresponding author
Pietrantonio, Filippo
Venue
Journal for ImmunoTherapy of Cancer
Publisher
BMJ
Published
2022-02
Volume
10
Issue
2
Pages
e004001
ISSN
2051-1426 (ISSN-L)
OpenAlex
W4210300714
Cited by
129
References
33
Citations by year
2026: 28 · 2025: 31 · 2024: 25 · 2023: 27 · 2022: 17 · 2012: 1
FWCI
10.46
Type
journal article
Language
en
Open access
Locations
  • Journal for ImmunoTherapy of Cancer (publishedVersion, cc-by-nc)
  • PubMed Central (publishedVersion, cc-by-nc)
  • PubMed (publishedVersion)
  • HAL (submittedVersion, other-oa)
  • Archivio Istituzionale della Ricerca (Universita Degli Studi Di Milano) (submittedVersion, other-oa)
  • Dipòsit Digital de Documents de la UAB (Universitat Autònoma de Barcelona) (submittedVersion, cc-by-nc)
  • CINECA IRIS Institutial research information system (University of Pisa) (submittedVersion, cc-by-nc)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
  • PubliCatt (Università Cattolica del Sacro Cuore) (submittedVersion, other-oa)
Funders
  • Amgen
  • Bristol-Myers Squibb
  • Eli Lilly and Company
  • Pfizer
  • AstraZeneca
  • GlaxoSmithKline
  • Sanofi
  • Taiho Pharmaceutical
  • MacroGenics
  • Daiichi-Sankyo
  • Eisai
  • Astellas Pharma
  • Servier
  • Ono Pharmaceutical
  • Chugai Pharmaceutical
  • Foundation Medicine
  • Daiichi Sankyo Europe
Topics
  • Health Sciences › Medicine › Oncology › Cancer Immunotherapy and Biomarkers
  • Health Sciences › Medicine › Surgery › Intraperitoneal and Appendiceal Malignancies
  • Health Sciences › Medicine › Oncology › Colorectal Cancer Treatments and Studies
Keywords
ascites, peritoneal carcinomatosis, immune checkpoint inhibitors, immune resistance, mismatch repair deficiency, microsatellite instability-high, metastatic colorectal cancer, metastatic gastric cancer, anti-PD-1 therapy, PD-L1 inhibitors, anti-CTLA-4, prognostic factors, progression-free survival, overall survival, malignant effusions, immunosuppression, tumor microenvironment
MeSH terms
Immune Checkpoint Inhibitors, Aged, Ascites, Female, Humans, Male, Neoplasm Metastasis, Retrospective Studies, Stomach Neoplasms, Colorectal Neoplasms, Survival Analysis, Microsatellite Instability

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review