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Zhao J, Ding H, Ding J, Shi X, He Y, Zhu H, Yuan H, Zhang T, Zhang J. The m 6A methyltransferase METTL3 promotes trophoblast cell invasion by regulating MYLK expression. Placenta 2022; 129:1-6. [PMID: 36170767 DOI: 10.1016/j.placenta.2022.09.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/23/2022] [Revised: 08/14/2022] [Accepted: 09/11/2022] [Indexed: 12/14/2022]
Abstract
INTRODUCTION The progression of placental diseases such as preeclampsia is closely related to trophoblast dysfunction. Recent studies indicated the dysregulation of N6-methyladenosine (m6A) RNA modification in trophoblast disorders, while the function of METTL3, a methyltransferase of m6A, in trophoblasts remains to be studied. METHODS The expression of METTL3 was determined by real-time PCR and immunoblotting. METTL3 expression in trophoblast cell lines HTR-8/SVneo and JEG-3 was knocked down using shRNA. The invasion of trophoblast cells in Matrigel was determined using xCELLigence. The m6A-containing transcripts was determined by m6A-sequencing in HTR-8/SVneo cells. The myosin light chain kinase (MYLK) gene was transfected into HTR-8/SVneo cells. RESULTS The expression of METTL3 was downregulated in preeclamptic placentae compared to normal placentae. Knockdown of METTL3 repressed the invasion of extravillous trophoblast cells. Mechanistically, METTL3 promoted the stability of MYLK mRNA through m6A modification. Overexpression of MYLK rescued retarded cell invasion by METTL3 depletion. DISCUSSION Collectively, our results highlight an essential role of METTL3-MYLK axis in trophoblast invasion.
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Affiliation(s)
- Jian Zhao
- Shaoxing Maternity and Child Health Care Hospital, Shaoxing, Zhejiang, 312000, China; Obstetrics and Gynecology Hospital of Shaoxing University, Shaoxing, Zhejiang, 312000, China
| | - Haigang Ding
- Shaoxing Maternity and Child Health Care Hospital, Shaoxing, Zhejiang, 312000, China; Obstetrics and Gynecology Hospital of Shaoxing University, Shaoxing, Zhejiang, 312000, China
| | - Jinlong Ding
- Shaoxing Maternity and Child Health Care Hospital, Shaoxing, Zhejiang, 312000, China; Obstetrics and Gynecology Hospital of Shaoxing University, Shaoxing, Zhejiang, 312000, China
| | - Xiaoliang Shi
- Shaoxing Maternity and Child Health Care Hospital, Shaoxing, Zhejiang, 312000, China; Obstetrics and Gynecology Hospital of Shaoxing University, Shaoxing, Zhejiang, 312000, China
| | - Yao He
- Shaoxing Maternity and Child Health Care Hospital, Shaoxing, Zhejiang, 312000, China; Obstetrics and Gynecology Hospital of Shaoxing University, Shaoxing, Zhejiang, 312000, China
| | - Hongdan Zhu
- Shaoxing Maternity and Child Health Care Hospital, Shaoxing, Zhejiang, 312000, China; Obstetrics and Gynecology Hospital of Shaoxing University, Shaoxing, Zhejiang, 312000, China
| | - Hua Yuan
- Shaoxing Maternity and Child Health Care Hospital, Shaoxing, Zhejiang, 312000, China; Obstetrics and Gynecology Hospital of Shaoxing University, Shaoxing, Zhejiang, 312000, China
| | - Tao Zhang
- Shaoxing Maternity and Child Health Care Hospital, Shaoxing, Zhejiang, 312000, China; Obstetrics and Gynecology Hospital of Shaoxing University, Shaoxing, Zhejiang, 312000, China.
| | - Juan Zhang
- Shaoxing Maternity and Child Health Care Hospital, Shaoxing, Zhejiang, 312000, China; Obstetrics and Gynecology Hospital of Shaoxing University, Shaoxing, Zhejiang, 312000, China.
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