Cited by 43Colorectal Cancer Treatments and StudiesGenetic factors in colorectal cancerColorectal Cancer Surgical Treatments

Clinical Challenges of Consensus Molecular Subtype CMS4 Colon Cancer in the Era of Precision Medicine

Open access
Mouillet-Richard, Sophie, Cazelles, Antoine, Sroussi, Marine, Gallois, Claire, Taieb, Julien, Laurent-Puig, Pierre·2024·Clinical Cancer Research

Abstract

Over the past decade, our understanding of the diversity of colorectal cancer has expanded significantly, raising hopes of tailoring treatments more precisely for individual patients. A key achievement in this direction was the establishment of the consensus molecular classification, particularly identifying the challenging consensus molecular subtype (CMS) CMS4 associated with poor prognosis. Because of its aggressive nature, extensive research is dedicated to the CMS4 subgroup. Recent years have unveiled molecular and microenvironmental features at the tissue level specific to CMS4 colorectal cancer. This has paved the way for mechanistic studies and the development of preclinical models. Simultaneously, efforts have been made to easily identify patients with CMS4 colorectal cancer. Reassessing clinical trial results through the CMS classification lens has improved our understanding of the therapeutic challenges linked to this subtype. Exploration of the biology of CMS4 colorectal cancer is yielding potential biomarkers and novel treatment approaches. This overview aims to provide insights into the clinico-biological characteristics of the CMS4 subgroup, the molecular pathways driving this subtype, and available diagnostic options. We also emphasize the therapeutic challenges associated with this subtype, offering potential explanations. Finally, we summarize the current tailored treatments for CMS4 colorectal cancer emerging from fundamental and preclinical studies.

AI snapshot

Written from the paper’s full text.

TL;DR

CMS4 colorectal cancer is an aggressive, stroma-rich, mesenchymal subtype with poor prognosis and limited benefit from standard chemotherapy. This review summarizes its clinical, histologic, and molecular hallmarks, diagnostic strategies, and emerging targeted or stroma-directed treatment approaches.

Key findings

  • CMS4 accounts for about 20%–25% of colorectal cancer cases and is associated with worse overall and relapse-free survival; prevalence increases with stage, from 10% in stage I to 38.5% in stage IV.
  • No genomic feature is specific to CMS4; key biological features include TGFβ pathway activation, YAP/TAZ signaling, PrPC/ILK signaling, elevated AKT3 and KIT, reduced mitochondrial complex I activity, and altered splicing.
  • Patients with stage II/III CMS4 benefit less from adjuvant chemotherapy, and in the metastatic setting irinotecan-based regimens have superior efficacy compared with oxaliplatin-based regimens; the PanaMa trial showed an OS benefit from adding panitumumab to 5-FU and folinic acid maintenance in CMS4 patients.
  • Selected CMS4 clinical signals include imatinib suppressing mesenchymal genes in posttreatment samples (n = 5), napabucasin plus pembrolizumab producing an immune-related objective response rate of 33% (2 of 6 CMS4 patients), nintedanib increasing PFS from 1.3 to 2.2 months (n = 60 nintedanib-treated and n = 59 placebo CMS4 patients), and regorafenib increasing PFS versus placebo (n = 26 CMS4 patients).

Methods

  • Narrative overview/review synthesizing published clinical, molecular, and preclinical literature on CMS4 colorectal cancer, with summary tables and proposed pathway figures.
  • No new patient cohort, experimental data, or formal systematic review/meta-analysis is reported; cited evidence includes clinical trials, preclinical models, organoids, mouse models, and diagnostic studies.

Limitations

  • Stated: data on CMS classes were mostly gained from United States/European populations, and the potential impact of race or ethnicity on CMS distribution remains to be evaluated.
  • Stated: the CMS classification was built on full transcriptome profiling, which is not yet compatible with day-to-day patient management; circulating PrPC levels could not be assessed for CMS discrimination because CMS classification was not available for those patients.
  • Evident: as a narrative review, there is no systematic search or quantitative synthesis, and several therapeutic signals come from small CMS4 subgroups (e.g., n = 5, n = 6, n = 26) and require validation.

Model-written summary. Check it against the paper before relying on it.

Integrity signals

Registry

Crossref · 10.1158/1078-0432.ccr-23-3964

Cites

76 of 76 references verified0 citation errors · 0 not checkable

Statistics

Nothing to recompute.

Claims the paper makes

0 of 101 cited sources checked · 0 supported · 0 flagged

  • Premisecitation

    CMS4 tumors have stromal enrichment.

    “A second outstanding and undisputed hallmark of CMS4 tumors is their stromal enrichment, which emerged both from transcriptomic signature (2) and histologic analyses (29).”
    Quote in the paperSubstantial claim0 of 2 sources checked
    • cites [2] Becht, 2016, Immune and stromal classification of colorectal cancer is associated with molecular subtypes and relevant for precision immunotherapy, Clin Cancer Res source

      Not checked in the free run.

    • cites [29] Sirinukunwattana, 2021, Image-based consensus molecular subtype (imCMS) classification of colorectal cancer using deep learning, Gut source

      Not checked in the free run.

  • Premisecitation

    Genetic alterations in SMAD4 and TGFBR2 are not overrepresented in the CMS4 subgroup.

    “such genetic alterations are not overrepresented in the CMS4 subgroup (1)”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites [1] Guinney, 2015, The consensus molecular subtypes of colorectal cancer, Nat Med source

      Not checked in the free run.

  • Premisecitation

    The consensus molecular subtype CMS4 of colorectal cancer is associated with poor prognosis, including worse overall survival and relapse-free survival.

    “the challenging consensus molecular subtype (CMS) CMS4 associated with poor prognosis”
    • Also stated in: § Introduction · plain
      “The so-called “mesenchymal” CMS4 subgroup (23% of patients) is that of worse overall survival (OS) and relapse-free survival (1)”
    • Also stated in: § Clinical hallmarks · plain
      “CMS4 colon cancers stand out from other subtypes by their aggressiveness and poor prognosis.”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites [1] Guinney, 2015, The consensus molecular subtypes of colorectal cancer, Nat Med source

      Not checked in the free run.

  • Premisecitation

    CMS4 tumors exhibit a mesenchymal morphology.

    “CMS4 tumors exhibit a mesenchymal morphology”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites [1] Guinney, 2015, The consensus molecular subtypes of colorectal cancer, Nat Med source

      Not checked in the free run.

  • Premisecitation

    TGFβ fosters the emergence of an immunosuppressive contexture.

    “and that it fosters the emergence of an immunosuppressive contexture”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites [34] Tauriello, 2018, TGFβ drives immune evasion in genetically reconstituted colon cancer metastasis, Nature source

      Not checked in the free run.

  • Classified as probably not a substantial claim. 4
  • May combine two claims. 6
  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisecitation

    Combined TGFβ targeting and immune checkpoint blockade may represent an attractive therapeutic strategy for CMS4 colorectal cancer.

    “leading to the proposition that combined TGFβ targeting and immune checkpoint blockade may represent an attractive therapeutic strategy for CMS4 colorectal cancer (34).”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites [34] Tauriello, 2018, TGFβ drives immune evasion in genetically reconstituted colon cancer metastasis, Nature source

      Not checked in the free run.

  • May combine two claims.

    Premisecitation

    The CMS4 subtype is barely if not detected in adenomas and arises at the carcinoma stage, notably after transition from an indolent CMS3 subtype.

    “A consensus that emerged from several studies is that the CMS4 subtype is barely if not detected in adenomas and arises at the carcinoma stage (17, 18), notably after transition from an indolent CMS3 subtype.”
    Quote in the paperNot a substantial claim0 of 2 sources checked
    • cites [17] Komor, 2018, Consensus molecular subtype classification of colorectal adenomas, J Pathol source

      Not checked in the free run.

    • cites [18] Chang, 2018, Colorectal premalignancy is associated with consensus molecular subtypes 1 and 2, Ann Oncol source

      Not checked in the free run.

  • May combine two claims.

    Premisecitation

    Cancer cells from CMS4 colorectal cancer reside in either a fibrotic intrinsic CMS2 (iCMS2) or iCMS3 state according to the type of lesion: TA-type CMS4 correspond to the iCMS2-F class, while SSL-type CMS4 correspond to the iCMS3-F class.

    “According to the single-cell study by Joanito and colleagues (14), cancer cells from CMS4 colorectal cancer reside in either a fibrotic intrinsic CMS2 (iCMS2) or iCMS3 state according to the type of lesion: TA-type CMS4 correspond to the iCMS2-F class (F standing for fibrotic), while SSL-type CMS4 correspond to the iCMS3-F class.”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites [14] Joanito, 2022, Single-cell and bulk transcriptome sequencing identifies two epithelial tumor cell states and refines the consensus molecular classification of colorectal cancer, Nat Genet source

      Not checked in the free run.

  • May combine two claims.

    Premisecitation

    Activation of YAP and/or TAZ is a cardinal trait of CMS4 colorectal cancer, similar to that of TGFβ.

    “Activation of YAP and/or TAZ appears to represent a cardinal trait of CMS4 colorectal cancer, similar to that of TGFβ (40).”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites [40] Mouillet-Richard, 2020, YAP/TAZ signalling in colorectal cancer: lessons from consensus molecular subtypes, Cancers source

      Not checked in the free run.

  • May combine two claims.

    Premisecitation

    Elevated AKT3 and KIT, reduced mitochondrial respiratory complex I activity, and modified alternative splicing landscape are biological hallmarks of CMS4.

    “Among other biological hallmarks of this subtype shown to contribute to CMS4 traits feature elevated AKT3 (42) and KIT (43), reduced mitochondrial respiratory complex I activity (44)—possibly resulting from KIT overexpression (43)—or modified alternative splicing landscape (45).”
    Quote in the paperNot a substantial claim0 of 4 sources checked
    • cites [42] Buikhuisen, 2021, AKT3 expression in mesenchymal colorectal cancer cells drives growth and is associated with epithelial-mesenchymal transition, Cancers source

      Not checked in the free run.

    • cites [43] Küçükköse, 2022, KIT promotes tumor stroma formation and counteracts tumor-suppressive TGFβ signaling in colorectal cancer, Cell Death Dis source

      Not checked in the free run.

    • cites [44] Bastin, 2023, Downregulation of mitochondrial complex I induces ROS production in colorectal cancer subtypes that differently controls migration, J Transl Med source

      Not checked in the free run.

    • cites [45] Xu, 2022, Alternative splicing downstream of EMT enhances phenotypic plasticity and malignant behavior in colon cancer, Elife source

      Not checked in the free run.

  • May combine two claims.

    Premisecitation

    ILK is overexpressed in CMS4 colon cancer and acts as a relay downstream from PrPC to activate YAP/TAZ signaling.

    “Another effector is the integrin linked kinase (ILK), which we found to be overexpressed in CMS4 colon cancer and to act as a relay downstream from PrPC to activate YAP/TAZ signaling (39).”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites [39] Ghazi, 2021, Prognostic value of the PrPC-ILK-IDO1 axis in the mesenchymal colorectal cancer subtype, Oncoimmunology source

      Not checked in the free run.

  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisecitation

    CMS4 accounts for 20%-25% of colorectal cancer cases.

    “While the CMS4 group globally accounts for 20%–25% of colorectal cancer cases (1)”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites [1] Guinney, 2015, The consensus molecular subtypes of colorectal cancer, Nat Med source

      Not checked in the free run.

  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisecitation

    Artificial intelligence opens new avenues for colorectal cancer classification with a high degree of robustness.

    “artificial intelligence is now opening up new avenues for colorectal cancer classification, with a high degree of robustness (29).”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites [29] Sirinukunwattana, 2021, Image-based consensus molecular subtype (imCMS) classification of colorectal cancer using deep learning, Gut source

      Not checked in the free run.

  • May combine two claims.

    Interpretationcitation

    TGFβ and Kynurenine are involved in the immunotolerant CMS4 tumor microenvironment.

    “Regarding the immunotolerant CMS4 TME, we posit an involvement of TGFβ (56) and Kynurenine (57), both produced by cancer cells under the control of PrPC (35, 39)”
    Quote in the paperSubstantial claim0 of 4 sources checked
    • cites [56] Tauriello, 2022, Overcoming TGFβ-mediated immune evasion in cancer, Nat Rev Cancer source

      Not checked in the free run.

    • cites [57] Platten, 2019, Tryptophan metabolism as a common therapeutic target in cancer, neurodegeneration and beyond, Nat Rev Drug Discov source

      Not checked in the free run.

    • cites [35] Le Corre, 2019, The cellular prion protein controls the mesenchymal-like molecular subtype and predicts disease outcome in colorectal cancer, EBioMedicine source

      Not checked in the free run.

    • cites [39] Ghazi, 2021, Prognostic value of the PrPC-ILK-IDO1 axis in the mesenchymal colorectal cancer subtype, Oncoimmunology source

      Not checked in the free run.

  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisecitation

    IHC defines CMS4 as pMMR, CDX2-negative and FRMD6, HTR2B and ZEB1-positive tumors.

    “IHC, CMS4 being defined as pMMR, CDX2-negative and FRMD6, HTR2B and ZEB1-positive tumors (28).”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites [28] Trinh, 2016, Practical and robust identification of molecular subtypes in colorectal cancer by immunohistochemistry, Clin Cancer Res source

      Not checked in the free run.

10 of 10
  • The paper relies on this without support.

    The CMS classification is not yet compatible with the day-to-day management of patients with colorectal cancer.

    “The CMS classification was built on full transcriptome profiling, which is not yet compatible with the day-to-day management of patients with colorectal cancer in the clinics.”
  • The paper relies on this without support.

    The molecular mechanisms behind the resistance of CMS4 colorectal cancer to 5-FU and oxaliplatin-based regimens are not fully understood.

    “The molecular mechanisms behind the resistance of CMS4 colorectal cancer to 5-FU and oxaliplatin-based regimens are not fully understood.”
2 of 2

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?

  • CMS4 tumours are marked by stromal signatures including cancer-associated fibroblasts and endothelial cells.

    “CMS1 tumours show a strong association with dMMR/MSI-H and, hence, display features of a cytotoxic adaptive immune reaction and respond to ICB, whereas CMS4 tumours are marked by stromal signatures including cancer-associated fibroblasts (CAFs) and endothelial cells.122”
  • CMS1 tumours show a strong association with dMMR/MSI-H and display features of a cytotoxic adaptive immune reaction and respond to immune checkpoint blockade.

    “CMS1 tumours show a strong association with dMMR/MSI-H and, hence, display features of a cytotoxic adaptive immune reaction and respond to ICB, whereas CMS4 tumours are marked by stromal signatures including cancer-associated fibroblasts (CAFs) and endothelial cells.122”

Self-check

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

Each contradiction between two passages listed here was confirmed by an independent check.

  • IHC marker is named differently in the text and Figure 3

    Minor

    The diagnosis section names the CMS4 IHC marker HTR2B, but the Figure 3 caption lists HTRB2 for the same staining panel.

1 of 1

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Authors
Mouillet-Richard, S., Cazelles, A., Sroussi, M., Gallois, C., Taieb, J., & Laurent-Puig, P.
Affiliations
  • 1Team “Personalized medicine, pharmacogenomics, therapeutic optimization”, Centre de Recherche des Cordeliers, INSERM, Sorbonne Université, Université Paris Cité, Paris, France.
  • Inserm (FR)
Venue
Clinical Cancer Research
Published
2024-04-02
Volume
30
Issue
11
Pages
2351-2358
ISSN
  • 1078-0432 (ISSN-L)
  • 1557-3265
OpenAlex
W4393537476
Cited by
43
References
76
Citations by year
2026: 18 · 2025: 22 · 2024: 3
FWCI
2.31
Type
journal article
Language
en
Open access
Locations
  • Clinical Cancer Research (publishedVersion, cc-by-nc-nd)
  • PubMed Central (publishedVersion, cc-by-nc-nd)
  • PubMed (publishedVersion)
  • HAL (submittedVersion, cc-by)
Funders
  • SIRIC CARPEM (INCa-DGOS-INSERM-ITMO Cancer_18006)
  • Fondation ARCAD
  • Labex Immuno-oncology
  • Association pour la Recherche sur le Cancer
  • Cancéropôle Ile de France
  • Fondation pour la Recherche Médicale
  • Institut National Du Cancer
  • Institut National de la Santé et de la Recherche Médicale
Topics
  • Health Sciences › Medicine › Oncology › Colorectal Cancer Treatments and Studies
  • Health Sciences › Medicine › Pathology and Forensic Medicine › Genetic factors in colorectal cancer
  • Health Sciences › Medicine › Oncology › Colorectal Cancer Surgical Treatments
Keywords
colorectal cancer, precision medicine, tumor microenvironment, prognostic factors, treatment challenges, molecular pathways, diagnostic biomarkers, preclinical models, tailored treatment
MeSH terms
Colonic Neoplasms, Humans, Prognosis, Biomarkers, Tumor, Colorectal Neoplasms, Consensus Sequence, Precision Medicine, Molecular Targeted Therapy, Tumor Microenvironment

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