Isolation of High-Quality RNA from Mammalian Spermatozoa for Transcriptome Studies

Area of Science:

• Reproductive Biology
• Molecular Biology
• Genomics

Background:

• Mammalian spermatozoa contain RNA (mRNA, miRNAs) that can indicate male fertility.
• Isolating spermatozoal RNA (spRNA) is difficult due to low concentrations and condensed DNA.
• Existing RNA extraction methods often reduce yield and quality.

Purpose of the Study:

• To develop an optimized protocol for high-quality spRNA extraction.
• To enable both short-read and long-read RNA sequencing (RNA-seq) of spRNA.
• To facilitate the use of spRNA as molecular markers for male fertility.

Main Methods:

• Semen samples are treated with a lysis solution to eliminate somatic cells.
• A monophasic solution containing guanidium thiocyanate (GITC) and 1,4-Dithiothreitol (DTT) is used for RNA isolation.
• The protocol is validated for compatibility with Illumina and Nanopore sequencing platforms.

Main Results:

• The optimized protocol yields high-quality spRNA.
• The extracted spRNA is suitable for both short-read and long-read RNA sequencing.
• The method addresses challenges of low concentration and DNA condensation in spermatozoa.

Conclusions:

• This protocol provides a reliable method for spRNA extraction.
• High-quality spRNA can be obtained for comprehensive transcriptome analysis.
• The improved RNA isolation supports research into male fertility markers.