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Updated: Jun 11, 2026

Cerebrospinal Fluid MicroRNA Profiling Using Quantitative Real Time PCR

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.

|June 9, 2026

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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.

Keywords:

Bovine semen Cryopreservation Endogenous reference miR-25-3p microRNA

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Last Updated: Jun 11, 2026

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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.