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LncRNA GAS5 Regulates Myometrial Cell Contractions in an m6A-Dependent Manner
Yue Sun1, Min Zhang1, Tianjun Wang1
1Department of Obstetrics, First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, Jiangsu, China.
Function (Oxford, England)
|March 7, 2025
Summary
Long non-coding RNAs (LncRNAs) like GAS5, regulated by m6A modification, are crucial for myometrial cell contraction during human labor onset. This study reveals a novel RNA epigenetic mechanism in parturition.
Area of Science:
- Reproductive biology
- Molecular epigenetics
- RNA biology
Background:
- Long non-coding RNAs (LncRNAs) play roles in physiological and pathological processes.
- The specific role of LncRNAs in initiating human labor remains largely unknown.
Purpose of the Study:
- To investigate the role of LncRNAs, specifically GAS5, in the onset of human labor.
- To elucidate the mechanism of LncRNA regulation by m6A modification in myometrial cells.
Main Methods:
- RNA sequencing of human myometrium (labor vs. non-labor).
- Detection of N6-Methyladenosine (m6A) complexes using RIP and meRIP.
- Functional assays including transfection, contraction assessment, RNA pulldown, and protein analysis.
- Coexpression analysis using FISH and immunofluorescence.
Main Results:
- GAS5 was significantly upregulated in human myometrium following labor onset.
- METTL3 and IGF2BP1 stabilized GAS5 RNA, enhancing myometrial cell contraction.
- GAS5 interacts with METTL3 and IGF2BP1, and transports TPM4 to contraction filaments.
- m6A modifications were observed in mouse myometrium post-labor.
Conclusions:
- GAS5, regulated by m6A modification, plays a critical role in myometrial cell contraction during human parturition.
- This study introduces a novel RNA epigenetic regulatory pathway in labor onset.
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