A Comprehensive Analysis of miRNA/isomiR Expression with Gender Difference

Area of Science:

• Genomics and Molecular Biology
• Epigenetics and Gene Regulation

Background:

• MicroRNAs (miRNAs) are key epigenetic regulators, but their gender-specific expression patterns remain understudied.
• Existing research often overlooks potential sex-based differences in miRNA and isomiR profiles.

Purpose of the Study:

• To investigate the relationship between gender and miRNA/isomiR expression across various human diseases and tissues.
• To determine if gender influences miRNA and isomiR expression variability.

Main Methods:

• Comprehensive analysis of small RNA sequencing datasets from male and female human samples.
• Identification of differentially expressed miRNAs between genders and tissues.
• Analysis of isomiR expression patterns and their statistical significance in normal versus tumor samples and between genders.

Main Results:

• Significant gender-based differences in miRNA expression were observed across different tissues.
• Some miRNAs exhibited inconsistent or opposite expression patterns between males and females.
• IsomiR expression patterns showed statistical significance between genders and sample types (tumor vs. normal), indicating variability.

Conclusions:

• Gender is a crucial factor influencing miRNA and isomiR expression profiles.
• The variability in miRNA and isomiR expression underscores the complexity of epigenetic regulation.
• Future disease-associated miRNA/isomiR screening must account for gender-specific differences.