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Identification of suitable reference genes for hepatic microRNA quantitation
Vishal Lamba1, Yogita Ghodke-Puranik, Weihua Guan
1Department of Experimental and Clinical Pharmacology, University of Minnesota, Minneapolis, MN, USA. lamba005@umn.edu.
BMC Research Notes
|March 11, 2014
Summary
Commonly used endogenous controls U6 and RNU6B are not stable for microRNA normalization in liver tissue. Mir-152 and mir-23b are identified as more reliable controls for accurate microRNA quantitation.
Area of Science:
- Molecular Biology
- Genomics
Background:
- MicroRNAs (miRNAs) are key regulators of gene expression implicated in various diseases.
- Accurate miRNA quantitation is crucial for biomarker development and functional studies.
- Real-time PCR is the standard method for miRNA quantification, requiring normalization with stable endogenous controls.
Purpose of the Study:
- To investigate inter-individual and gender-based variability in hepatic miRNA expression.
- To identify the most stable endogenous control/s for normalizing miRNA expression in liver samples.
Main Methods:
- Quantified hepatic expression of 22 miRNAs, U6, and RNU6B in 50 human liver samples using Taqman real-time PCR.
- Assessed expression stability of candidate endogenous controls using Normfinder and GeNormplus software.
Main Results:
- U6 and RNU6B exhibited significant instability and were unsuitable as endogenous controls.
- Mir-152 and mir-23b were identified as the most stable miRNA candidates by both analysis programs.
- Mir-152 and mir-23b were successfully used as endogenous controls for normalizing hepatic miRNA levels.
Conclusions:
- U6 and RNU6B are not appropriate for normalizing miRNA expression in hepatic tissues.
- Using unstable controls like U6 and RNU6B can lead to inaccurate conclusions in miRNA studies.
- Mir-152 and mir-23b represent superior endogenous controls for reliable miRNA quantitation in liver samples.
