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Urine RNA Processing in a Clinical Setting: Comparison of 3 Protocols
Megan S Bradley, Marie-Helene Boudreau1, Carole Grenier1
1Department of Obstetrics and Gynecology, and.
Female Pelvic Medicine & Reconstructive Surgery
|December 2, 2017
Summary
The ZR Urine RNA Isolation Kit yields higher quality RNA from urine samples, making it suitable for polymerase chain reaction (PCR) applications, despite lower overall RNA quantity compared to other methods.
Area of Science:
- Molecular Biology
- Clinical Diagnostics
Background:
- Urine samples are a non-invasive source for diagnostic biomarkers.
- Efficient RNA extraction from urine is crucial for molecular analysis.
Purpose of the Study:
- To compare the quantitative and qualitative RNA extraction efficiency of three commercial kits from clinical urine samples.
- To identify the optimal RNA extraction protocol for downstream molecular applications.
Main Methods:
- Three RNA extraction kits (TRI Reagent Protocol, Absolutely RNA Nanoprep Kit, ZR Urine RNA Isolation Kit) were evaluated using clinical voided urine samples.
- Quantitative and qualitative RNA analysis was performed, including real-time polymerase chain reaction (RT-PCR).
Main Results:
- The TRI Reagent Protocol yielded a significantly higher median RNA quantity.
- The ZR Urine RNA Isolation Kit demonstrated significantly lower median threshold cycle values in RT-PCR, indicating superior RNA quality for downstream applications.
- RNA integrity number (RIN) in phase 2 averaged 2.5.
Conclusions:
- The ZR Urine RNA Isolation Kit provides the highest quality RNA from clinical urine samples, outperforming other kits for downstream PCR.
- This kit's lack of a centrifugation step makes it practical for clinical settings.
- While suitable for PCR, the extracted RNA may not possess sufficient integrity for RNA sequencing.
