Abstract
Background
The presence of peritoneal metastasis (PM) in colorectal cancer (CRC) patients indicates an advanced CRC stage. Prompt diagnosis and early PM detection are difficult, and the underlying mechanisms are unclear, resulting in limited treatment options and unsatisfactory therapeutic effects. We aimed to identify applicable biomarkers for accurately diagnosing synchronous PM in CRC patients.
Methods
Differentially expressed genes between synchronous and non-synchronous PM groups were identified via label-free proteomic analysis of primary tumors from 31 CRC patients. Quantitative real-time PCR, multiplex and conventional immunohistochemistry were used to validate gene expression. We attempted to construct a logistic regression risk model for the diagnosis of PM, which was tested in a training cohort and validated in an independent cohort.
Results
Utilizing the results from multi-omics, we established an ABCC1-based risk model. In CRC patients with imaging-negative diagnoses, the model identified patients with metastases including PM (AUC = 0.892, 95% CI: 0.840–0.944) or those with PM only (AUC = 0.859, 95% CI: 0.794–0.924); these results were validated in an independent cohort of patients with metastases including PM (AUC = 0.831, 95% CI: 0.729–0.933) or PM only (AUC = 0.819, 95% CI: 0.702–0.936). In CRC patients with CEA-negative, this model more effectively distinguishes those with exclusive peritoneal involvement, with consistent results across both training (AUC = 0.913, 95% CI: 0.854–0.972) and validation (AUC = 0.869, 95% CI: 0.795–0.943) cohorts. Additionally, in CRC patients with PM, low ABCC1 may serve as a predictive marker for chemotherapy efficacy.
Conclusions
The ABCC1-based risk model effectively predicts PM in CRC, complementing traditional diagnostics. ABCC1 may serve as a predictive marker for chemotherapy efficacy in PM.
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Data availability
The Proteomics datasets supporting the conclusions of this article have been uploaded to the iProx Consortium with the project ID IPX0006751000. All other data that support the findings of this study are available from the corresponding authors upon reasonable request.
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Acknowledgements
The authors would like to express their sincere gratitude to Dr. Lishuo Shi, Huanmiao Zhan, and Hongfei Liang for their invaluable contributions in statistical consultation and follow-up update. Moreover, With the greatest respect, this article is dedicated to and in memorial of Professor Lei Wang, who was the formal vice president of our hospital.
Funding
This work was financially supported by the Natural Science Foundation of China (Grant No. 31970703), Natural Science Foundation of Guangdong Province (Grant No. 2022A1515012472 and 2025A1515010593), and supported by National Key Clinical Discipline and the Program.
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Conception or design of the work: DC Chen and P Lan; data collection: WQ Xie, QX Luo, Q Wang, ZM Ou; data analysis and interpretation: WQ Xie and ZM Ou; drafting the article: WQ Xie, QX Luo, and DC Chen; critical revision of the article: DC Chen, P Lan, WQ Xie, QX Luo, ZM Ou, WJ Liu, MH Huang; final approval of the version to be published: all the authors.
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All procedures were conducted in accordance with the Declaration of Helsinki and approved by the Human Medical Ethics Committee of the Sixth Affiliated Hospital of Sun Yat-sen University (approval number: 2022ZSLYEC-469). This study is a retrospective study and the information are anonymous. The authors had no access to any identifying information during the analysis of the data. In accordance with the relevant guidelines and regulations, the requirement for informed consent was waived.
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Xie, W., Luo, Q., Ou, Z. et al. An ABCC1-based risk model is effective in the diagnosis of synchronous peritoneal metastasis in advanced colorectal cancer. Br J Cancer (2025). https://doi.org/10.1038/s41416-025-03203-1
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DOI: https://doi.org/10.1038/s41416-025-03203-1