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Updated: Jun 8, 2026

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Cerebrospinal Fluid MicroRNA Profiling Using Quantitative Real Time PCR
Published on: January 22, 2014
The microRNA spectrum in 12 body fluids
Jessica A Weber1, David H Baxter, Shile Zhang
1Institute for Systems Biology, 1441 North 34th St., Seattle, WA 98103, USA.
Clinical Chemistry
|September 18, 2010
Summary
MicroRNAs (miRNAs) are found in all tested body fluids, with distinct compositions. These extracellular miRNAs show potential as biomarkers for various diseases, including cancer.
Area of Science:
- Molecular Biology
- Biochemistry
- Genetics
Background:
- MicroRNAs (miRNAs) are small, noncoding RNAs regulating biological processes.
- Extracellular miRNAs in body fluids are linked to pathological conditions like cancer.
Purpose of the Study:
- To assess miRNA distribution in human body fluids.
- To demonstrate the potential of miRNAs as diagnostic biomarkers.
Main Methods:
- Examined miRNA presence in 12 human body fluids and urine samples.
- Utilized quantitative PCR for global miRNA distribution survey.
Main Results:
- miRNAs detected in all tested body fluids.
- Distinct miRNA compositions observed across different fluid types.
- Specific miRNA patterns identified in urine from individuals with varying physiopathological conditions.
Conclusions:
- miRNAs are ubiquitous in all tested body fluids.
- Fluid-specific miRNAs may have tissue-associated functional roles.
- Altered miRNA profiles in urine suggest potential as biomarkers for disease detection and monitoring.

