Clinical Report: Urine as a Cancer ‘Biopsy’?

Overview

This study identifies a mechanism by which tumor-derived extracellular vesicles (EVs) are transferred from the bloodstream into urine, supporting the concept of urine-based cancer testing. The findings suggest that the kidney glomerulus actively participates in this process, enhancing the potential for non-invasive cancer diagnostics.

Background

Urine-based testing for cancer is an emerging area of interest due to its non-invasive nature, which can improve patient compliance and comfort. Understanding how tumor-derived EVs enter urine is crucial for developing reliable liquid biopsy assays. This research provides biological insights that could enhance the diagnostic utility of urine samples in detecting cancers beyond the urinary tract.

Data Highlights

No numerical data available in the provided source material.

Key Findings

• The kidney glomerulus actively internalizes and transports circulating tumor-derived EVs into urine.
• Engineered cancer cell types demonstrated that EVs can be tracked from the bloodstream to urine.
• GeNL-labeled tumor-derived EVs were found in urine at higher levels than in plasma.
• Glomerular processing may enrich certain EV populations in urine, influencing biomarker content.
• This mechanism provides a biological basis for detecting tumor-associated biomarkers in urine.

Clinical Implications

The findings suggest that urine could serve as a viable medium for non-invasive cancer diagnostics, potentially reducing the need for invasive procedures. Understanding the role of the kidney in processing EVs may guide the development of more effective urine-based assays for various cancers.

Conclusion

This research underscores the potential of urine as a source for cancer biomarkers, paving the way for future studies to explore its application in clinical diagnostics. Further investigation is needed to assess the relevance of these findings across different tumor types.

References

1. Kawaguchi et al., Science Advances, 2023 -- Glomerular routing of tumor-derived extracellular vesicles substantiates urinary biopsy
2. the asco post — New NIH-Funded Study Identifies Urine-Based Assay for Prostate Cancer
3. the pathologist — The Test That Could Save Patients' Bladders
4. the asco post — Can a Urine Test Minimize Postoperative Scans for RCC Recurrence?
5. the asco post — Urine-Based Biomarker Panel for the Detection of Prostate Cancer
6. New NIH-Funded Study Identifies Urine-Based Assay for Prostate Cancer
7. The Test That Could Save Patients' Bladders
8. Can a Urine Test Minimize Postoperative Scans for RCC Recurrence?
9. https://d56bochluxqnz.cloudfront.net/documents/full-guideline/EAU-Guidelines-on-Non-muscle-invasive-Bladder-Cancer-2025.pdf
10. Early Detection of Prostate Cancer: AUA/SUO Guideline (2023) - American Urological Association
11. (PDF) Glomerular routing of tumor-derived extracellular vesicles substantiates urinary biopsy