Related Experiment Video
Updated: Mar 10, 2026
05:05
A Modified Precipitation Method to Isolate Urinary Exosomes
Published on: January 16, 2015
18.1K
Comparative miRNA Analysis of Urine Extracellular Vesicles Isolated through Five Different Methods
Felix Royo1, Izzuddin Diwan2, Michael R Tackett3
1Exosomes Lab, CIC bioGUNE, CIBERehd, Derio 48160, Spain. froyo.ciberehd@cicbiogune.es.
Cancers
|December 16, 2016
Summary
Urine extracellular vesicles (uEVs) offer valuable biomarkers. This study found multiple isolation methods effectively detect miRNAs, supporting their clinical use for genitourinary conditions.
Area of Science:
- Biochemistry
- Molecular Biology
- Urology
Background:
- Urine extracellular vesicles (uEVs) are a promising source for non-invasive biomarkers.
- Isolation and characterization techniques for uEV cargo are crucial for biomarker discovery.
- Genitourinary tract conditions can be monitored through urinary biomarkers.
Purpose of the Study:
- To compare five different methods for isolating extracellular vesicles from urine.
- To evaluate miRNA profiling using a multiplex assay and validate results with qPCR.
- To assess the feasibility of using uEV-derived miRNAs as biomarkers in clinical settings for genitourinary diseases.
Main Methods:
- Comparison of three commercial kits, ultracentrifugation, and lectin-based purification for uEV isolation.
- miRNA profiling using a multiplex assay.
- Validation of miRNA detection via Taqman qPCR.
- Analysis of selected miRNAs in urine from patients with bladder cancer, benign prostate hyperplasia, and prostate cancer using a clinically friendly uEV-enrichment method.
Main Results:
- High correlation observed across all five isolation techniques for miRNA detection.
- 48 out of 68 detected miRNAs were consistently found above the detection limit.
- Selected miRNAs were detected in nearly 100% of patient urine samples.
- No significant differences in miRNA levels were observed between patient groups.
Conclusions:
- Multiple isolation methods are suitable for analyzing miRNAs from urine extracellular vesicles.
- The multiplex assay combined with a clinically friendly uEV-enrichment method is feasible for high-throughput analysis.
- uEV-associated miRNAs show potential as non-invasive biomarkers for genitourinary conditions, detectable in small urine volumes and compatible with clinical environments.
