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Analysis of MicroRNAs Expression Across Cells, Tissues, and Body Fluids
Julie Perrot1, Imene Hani1, Laetitia Martinerie1,2,3
1Université Paris-Saclay, Inserm, Physiologie et Physiopathologie Endocriniennes, Le Kremlin-Bicêtre, France.
Methods in Molecular Biology (Clifton, N.J.)
|November 21, 2025
Summary
Accurate quantification of microRNAs (miRNAs) is crucial for biological insight. This chapter details methods for miRNA extraction and quantification using RT-qPCR and digital droplet PCR (ddPCR).
Area of Science:
- Molecular Biology
- Genetics
- Biochemistry
Background:
- MicroRNAs (miRNAs) are vital post-transcriptional gene regulators.
- Understanding miRNA function necessitates precise quantification.
- Current methods require optimization for comprehensive analysis.
Purpose of the Study:
- To provide a comprehensive overview of miRNA quantification techniques.
- To detail methodologies for miRNA extraction from diverse biological samples.
- To explain the principles and application of RT-qPCR and ddPCR for miRNA analysis.
Main Methods:
- Describes standardized protocols for isolating miRNAs from cellular, tissue, and fluid samples.
- Outlines the process of reverse transcription for miRNA cDNA synthesis.
- Explains quantification strategies using quantitative real-time PCR (RT-qPCR) and digital droplet PCR (ddPCR).
Main Results:
- Provides clear procedural guidelines for miRNA extraction and downstream analysis.
- Elucidates the technical aspects of RT-qPCR and ddPCR for accurate miRNA measurement.
- Highlights the importance of validated methods for reliable biological interpretation.
Conclusions:
- Accurate miRNA quantification is achievable through optimized extraction and precise detection methods.
- RT-qPCR and ddPCR offer powerful tools for studying miRNA expression profiles.
- This chapter serves as a practical guide for researchers in molecular biology and related fields.
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