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Updated: Jun 11, 2026
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Cerebrospinal Fluid MicroRNA Profiling Using Quantitative Real Time PCR
Published on: January 22, 2014
Reference microRNA selection for qPCR normalization in cryopreserved Bos taurus semen.
Lucas Petitemberte de Souza1, Leandro Silva Nunes1, Luana Carla Salvi1
1Laboratório de Genômica Estrutural, Programa de Pós-Graduação em Biotecnologia, Centro de Desenvolvimento Tecnológico, Universidade Federal de Pelotas, Pelotas, RS, Brazil.
Cryobiology
|June 9, 2026
Summary
Identifying a stable reference microRNA (miRNA) for accurate gene expression analysis in cryopreserved bull semen is crucial. miR-25-3p is validated as the most reliable miRNA for normalizing quantitative PCR data in frozen semen.
Area of Science:
- Reproductive Biotechnology
- Molecular Biology
- Animal Science
Background:
- Accurate microRNA (miRNA) quantification in cryopreserved bovine semen is vital for identifying fertility biomarkers.
- Quantitative PCR (qPCR) data normalization is challenging due to a lack of validated endogenous reference miRNAs for frozen-thawed semen.
Purpose of the Study:
- To identify a stable and reliable endogenous reference miRNA for normalizing qPCR data in cryopreserved bull semen.
- To evaluate the stability of candidate reference miRNAs in fresh and frozen-thawed bovine semen.
Main Methods:
- Sperm quality parameters (motility, membrane integrity, acrosomal status, DNA fragmentation) were assessed.
- Expression stability of five candidate miRNAs was analyzed using ΔCt, geNorm, NormFinder, and BestKeeper algorithms.
- RefFinder was used for comprehensive ranking of miRNA stability.
Main Results:
- Cryopreservation significantly impacted sperm membrane integrity and acrosomal status but not DNA integrity.
- miR-25-3p demonstrated the highest stability across algorithms and was identified as the optimal reference miRNA.
- U6 and miR-204-5p exhibited high variability, rendering them unsuitable for normalization.
Conclusions:
- miR-25-3p is a reliable endogenous reference miRNA for qPCR normalization in cryopreserved bovine semen.
- Validated normalizers are essential for improving the accuracy and reproducibility of miRNA expression studies in reproductive biotechnology.
