Differential Expression of Small Non-Coding RNAs in Uterine Leiomyomas

Area of Science:

• Gynecologic Oncology
• Molecular Biology
• Genetics

Background:

• Uterine leiomyomas (Lyo) are common benign tumors with complex genetic underpinnings.
• Small non-coding RNAs (sncRNAs) play crucial roles in gene regulation and have been implicated in various diseases.
• MED12 mutations are frequent in leiomyomas, and racial disparities exist in leiomyoma prevalence and severity.

Purpose of the Study:

• To investigate the role of sncRNAs in uterine leiomyoma pathogenesis.
• To explore the influence of MED12 mutation status and race/ethnicity on sncRNA expression profiles in leiomyoma.

Main Methods:

• Next-generation sequencing (NGS) of RNA from paired leiomyoma and myometrium specimens (n=19).
• Stratification of samples by race/ethnicity (White, Black) and MED12 mutation status.
• Quantitative real-time PCR (qRT-PCR) for validation of selected sncRNAs in a larger cohort (n=51).

Main Results:

• 2,189 differentially expressed sncRNAs (including snRNAs, snoRNAs, miRNAs, piRNAs) were identified between leiomyoma and myometrium.
• MED12 mutation status significantly impacted sncRNA expression, with 17 sncRNAs altered in the mutated group.
• Race/ethnicity was associated with differential expression of 31 sncRNAs, with specific miRNAs and piRNAs linked to racial background.

Conclusions:

• sncRNA dysregulation is a key feature of uterine leiomyoma.
• MED12 mutations and patient race/ethnicity are significant factors influencing sncRNA expression patterns in leiomyoma.
• These findings highlight sncRNAs as potential contributors to leiomyoma development and suggest therapeutic targets.