Abstract
Background
Two thirds of renal cell carcinoma (RCC) patients have localized disease at diagnosis. A significant proportion of these patients will relapse. There is a need for prognostic biomarkers to improve risk-stratification and specific treatments for patients that relapse. The objective of this study is to determine the clinical utility of microRNA signatures as prognostic biomarkers in localized clear cell RCC (ccRCC) and propose new therapeutic targets in patients with a high-risk of relapse.
Patients and methods
The microRNA profiles from a discovery cohort of 71 T1-T2 ccRCC patients (n = 88) were analyzed using microarrays. MicroRNAs prognostic value was established, and a microRNAs signature predicting relapse for T1b-T3 disease was defined. Independent validation was carried out by qPCR in cohorts from UK (n = 75) and Spain (n = 180), and the TCGA cohort (n = 175). In the Spanish validation cohort, proteomics experiments were done. Proteins were extracted from FFPE tissue and analyzed using by data-independent acquisition mass spectrometry. Additionally, ccRCC TCGA RNA-seq data was also analyzed. Both protein and RNA-seq data was analyzed using Significance Analysis of Micorarrays (SAM) and probabilistic graphical models, which allow the identification of relevant biological processes between low and high-risk tumors.
Results
A 9-microRNAs signature, Bio-miR, classified patients into low- and high-risk with disease-free survival (DFS) at 5 years of 87.12 vs. 54.17% respectively (p = 0.0086, HR = 3.58, 95%CI: 1.37-8.3). Results were confirmed in the validation cohorts with 5-year DFS rates of 94% vs. 62% in the UK cohort (HR = 7.14, p = 0.001), 82.9% vs. 58.7% in the Spanish cohort (HR = 2.46, p = 0.0013), and 5-year overall survival rates of 72.7% vs. 44.5% in the TCGA cohort (HR = 2.43, p = 0.0012). Among low-risk patients according to adjuvant immunotherapy clinical trial criteria, Bio-miR identified a high-risk group. Maybe those patients ought to be considered to receive adjuvant therapy. Proteins overexpressed in the high-risk group were mainly related to focal adhesion, serine and inositol metabolism, and angiogenesis. Probabilistic graphical models defined eight functional nodes related to specific biological processes. Differences between low- and high-risk tumors were detected in complement activation and translation functional nodes. In ccRCC TCGA cohort, 676 genes were differentially expressed between low and high-risk patients, mainly related to complement activation, adhesion, and chemokine and cytokine cascades. In this case, probabilistic graphical models defined ten functional nodes. Calcium binding, membrane, adhesion, extracellular matrix, blood microparticle, inflammatory response and immune response had higher functional node activity, and metabolism node, containing genes related to retinol and xenobiotic and CYP450 metabolism, had lower activity in the high-risk group.
Conclusions
Bio-miR dichotomizes ccRCC patients with non-metastatic disease into those with low- and high-risk of relapse. This has implications for treatment and follow-up, identifying patients most likely to benefit from adjuvant treatment in clinical trials, preventing unnecessary exposure to side-effects, and providing health economics benefits. Additionally, promising therapeutic targets, as angiogenesis, immune response, metabolism, or complement activation, were found deregulated in high-risk ccRCC patients defined by Bio-miR. These findings may be useful to select patients for tailored, molecularly-driven clinical trials.
Patient summary
Identifying which patients with kidney cancer are most at risk of their cancer coming back after surgery is critical, so that they can be prioritized for early treatment. We have identified a combination of biomarkers present in the cancer tissue (called BiomiR) which can help to do this.
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Data availability
Proteomics raw data are available in the ProteomeXchange Consortium via the PRIDE (http://www.ebi.ac.uk/pride) partner repository with the data set identifier PXD039258.
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Acknowledgements
We want acknowledge the Biobank of Hospital La Paz, Basque Biobank for Research O + EHUN, and the SSPA Biobank, integrated in the Spanish National Biobanks Network for their collaboration. We want to particularly acknowledge the patients who participated in this study.
Funding
This work was supported by EPIC-XS, project number 823839, funded by the Horizon 2020 programme of the European Union. CDTI IDI-20200073, PTQ2018-009760 (MICINN), EPIC-XS, project number 823839, funded by the Horizon 2020 programme of the European Union.
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AP-M, JM-P, NSV, NM, AP, GdV, DC, and EE participated in data curation. NV, EG-F, RL-V, MW, EL-C, AD, LK, JB, YP-J, PG-P, and REB contributed to methodology. LT-F, NSV, MW, EL-C, AZ-M, JAFV, and AG-P performed formal analysis. AP-M and LT-F wrote the original draft. AG-P reviewed and corrected the manuscript. AP-M, EE, JAFV and AG-P participated in the conceptualization and design of the study. AG-P obtained resources for doing this study.
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Competing interests
AP: Research funding: Pfizer, BMS Advisory boards: Pfizer, Novartis, Ipsen, BMS, Janssen, Astellas, Sanofi, Bayer, Clovis, Roche, MSD, Pierre Fabre, Merck Clinical trial payments: Pfizer, Bayer, Janssen, MSD, Clovis, Pharmacyclics, BMS, Sanofi, Astra Zeneca, Roche, Eisai, Aveo. Travel arrangements: Janssen, Roche, Pfizer, BMS, Ipsen. EE: Biomedica Molecular Medicine Shares, Bio-miR patent, Courses: BMS, MSD, Pierre Fabré and Novartis. AGP: Biomedica Molecular Medicine Shares, Bio-miR patent. JAFV: Biomedica Molecular Medicine Shares, Bio-miR patent. NV: Research funding: BMS Advisory boards: BMS, Pfizer, Merck Speaker fees: Ipsen, BMS, Eisai, EUSA pharma.
Ethical approval and consent to participate
In all cases, written informed consent was obtained from patients and ethical approvals were obtained, specifically Hospital Doce de Octubre Ethical Committee (17/214) for the discovery cohort, Leeds East Research Ethics Committee (20/YH/0103) for the Leeds validation cohort and Hospital La Paz Ethical Committee (PI-3310) for the Spanish validation cohort. All methods were performed in accordance with the relevant guidelines and regulations.
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Supplementary information
41416_2025_3008_MOESM2_ESM.txt
List pf proteins overexpressed in BiomiR high-risk group in the Spanish validation cohort according to a Significance Analysis of Microarrays and their gene ontology
41416_2025_3008_MOESM3_ESM.txt
Functional nodes identified in the protein network built using probabilistic graphical models and proteomics data from the Spanish validation cohort
41416_2025_3008_MOESM4_ESM.txt
List of proteins overexpressed in BiomiR high-risk group in the ccRCC TCGA cohort according to a Significance Analysis of Microarrays and their gene ontology
41416_2025_3008_MOESM5_ESM.txt
Functional nodes identified in the protein network built using probabilistic graphical models and proteomics data from the ccRCC TCGA cohort
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Pinto-Marín, Á., Trilla-Fuertes, L., Miranda Poma, J. et al. A prognostic microRNA-based signature for localized clear cell renal cell carcinoma: the Bio-miR study. Br J Cancer (2025). https://doi.org/10.1038/s41416-025-03008-2
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DOI: https://doi.org/10.1038/s41416-025-03008-2