Microarray analysis of microRNA expression patterns in the semen of infertile men with semen abnormalities

Area of Science:

• Reproductive Biology
• Molecular Biology
• Genetics

Background:

• MicroRNAs (miRNAs) are critical regulators of gene expression involved in tissue development and disease pathology.
• The role of miRNAs in the development of semen abnormalities and male infertility remains largely unexplored.

Purpose of the Study:

• To investigate the differential expression of miRNAs in the semen of infertile males with abnormalities compared to healthy males.
• To identify specific miRNAs associated with semen abnormalities in infertile populations.

Main Methods:

• miRNA expression profiling was performed using miRNA microarrays on semen samples from 86 infertile males and 86 healthy males.
• Differential expression analysis identified 52 significantly altered miRNAs.
• Validation of selected miRNA candidates was conducted using real-time quantitative reverse transcription polymerase chain reaction (qRT-PCR) and northern blotting.

Main Results:

• 52 miRNAs were found to be differentially expressed between infertile and healthy individuals.
• Specific miRNAs, including miR-574-5p, miR-297, miR-122, miR-1275, miR-373, miR-185, and miR-193b, were upregulated in infertile males.
• Conversely, miR-100, miR-512-3p, miR-16, miR-19b, miR-23b, and miR-26a were downregulated in infertile males.

Conclusions:

• This study reveals a distinct miRNA expression profile in the semen of infertile males with abnormalities.
• Identified miRNAs represent potential biomarkers for diagnosing semen abnormalities and understanding male infertility.
• These findings contribute novel insights into the molecular mechanisms underlying male infertility.