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Mutations

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Related Experiment Video

Updated: Jun 13, 2025

Isolation of Primary Patient-specific Aortic Smooth Muscle Cells and Semiquantitative Real-time Contraction Measurements In Vitro

Isolation of Primary Patient-specific Aortic Smooth Muscle Cells and Semiquantitative Real-time Contraction Measurements In Vitro

Published on: February 15, 2022

Somatic MED12 Mutations in Myometrial Cells.

Yinuo Li¹, Huma Asif², Yue Feng¹

¹Department of Pathology, Northwestern University, Chicago, IL 60611, USA.

|September 14, 2024

Summary

This study reveals that non-cancerous myometrial cells frequently carry MED12 mutations, particularly at specific sites. This finding suggests early genetic events in myometrial cells may initiate uterine leiomyoma (LM) development.

Keywords:

MED12 mutation duplex deep sequencing leiomyoma myometrium

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Contractility Measurements of Human Uterine Smooth Muscle to Aid Drug Development

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Published on: January 26, 2018

Area of Science:

Gynecology
Molecular Biology
Genetics

Background:

Uterine leiomyomas (LMs) are common benign tumors, with over 70% harboring MED12 mutations.
Myometrial cells are the cell of origin for LMs, but their MED12 mutation status is largely unknown.
Detecting low-frequency mutations requires sensitive sequencing methods.

Purpose of the Study:

To investigate the mutation burden of MED12 in non-neoplastic myometrial cells.
To determine if MED12 mutations are present in the cell of origin for uterine leiomyomas.
To explore the potential role of early somatic MED12 mutations in leiomyoma development.

Main Methods:

Utilized duplex deep sequencing analysis (DDS) for high-sensitivity mutation detection (<0.1%).
Dissected tumor-free myometrial tissue and extracted genomic DNA.
Targeted capture of MED12 exon 2 and TP53 exon 5 (control) followed by DDS.

Main Results:

DDS detected a high frequency of MED12 mutations in myometrial cells, predominantly at the c.130-131 sites.
Baseline mutation levels in other MED12 regions and the TP53 hotspot were low.
This is the first report of non-random MED12 mutation accumulation in non-neoplastic myometrial cells.

Conclusions:

Non-neoplastic myometrial cells exhibit a significant burden of MED12 mutations at specific hotspots.
These findings provide molecular evidence for early somatic MED12 mutations in myometrial cells.
Early MED12 mutations may contribute to the cellular origin of uterine leiomyomas.