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Volume 13 Issue 4
Jul.  2022
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WANG Hanbi, DOU Shuaijie, LIU Simiao, ZHANG Wanyu, LIU Meizhi, DENG Chengyan. Changes of MicroRNA Expression and Apoptosis in Endometrial Glandular Epithelial Cells under Hypoxic[J]. Medical Journal of Peking Union Medical College Hospital, 2022, 13(4): 626-631. DOI: 10.12290/xhyxzz.2022-0095
Citation: WANG Hanbi, DOU Shuaijie, LIU Simiao, ZHANG Wanyu, LIU Meizhi, DENG Chengyan. Changes of MicroRNA Expression and Apoptosis in Endometrial Glandular Epithelial Cells under Hypoxic[J]. Medical Journal of Peking Union Medical College Hospital, 2022, 13(4): 626-631. DOI: 10.12290/xhyxzz.2022-0095
shu

Changes of MicroRNA Expression and Apoptosis in Endometrial Glandular Epithelial Cells under Hypoxic

  • 1.

    Centre of Gynecological Endocrinology and Assisted Reproduction, National Clinical Research Centre for Obstetric & Gynecologic Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100730, China

  • 2.

    State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100730, China

  • 3.

    Beijing Zhicheng Biomedical Technology Co., Ltd, Beijing 100176, China

Funds: 

Chinese Medical Association Clinical Medical Research Fund 19020020781

Non-profit Central Research Institute Fund of Chinese Academy of Medical Sciences 2021-PT320-001

More Information
  • Corresponding author:

    DENG Chengyan, E-mail: chydmd@sohu.com

  • Received Date: March 01, 2022
  • Accepted Date: April 12, 2022
  • Issue Publish Date: July 29, 2022
    Graphical Abstract
    • Abstract
  •   Objective  To explore the changes in the transcription levels of microRNAs(miRNAs) in endometrial glandular epithelial cells (EECs) under hypoxia and their effects on apoptosis.
      Methods  EECs were seeded into six-well plates in logarithmic growth phase(1×105 cells/well), and divided into two groups: hypoxia group and control group. The cells in both hypoxia group and the control group were placed in a hypoxic environment (the volume ratio of O2∶N2∶CO2 was 1∶94∶5) and cultured in normoxic environment (O2∶CO2 volume ratio of 95∶5). All cells were collected after they were cultured 4 h, and Trizol was added into the cells and total RNAs were extracted. High-throughput sequencing was used to detect the changes of miRNAs expression profiles in the two groups of EECs. Subsequently, realtime fluorescence quantitative polymerase chain reaction (RT-PCR) was used to detect the gene expression of miR-7704 and miR-7974. Flow cytometry was used to detect the apoptosis of EECs. The protein expression changes of p53 and apoptosis-related proteins were detected by Western blot.
      Results  High-throughput sequencing detected the expression levels of 21 common miRNAs. Compared with the control group, 16 miRNAs were up-regulated and 5 miRNAs were down-regulated in the EECs of the hypoxia group; the expression of miR-7704 and miR-7974 decreased most significantly in the hypoxia group(all P < 0.05). RT-PCR results showed that compared with the control group, the relative expression levels of miR-7704 and miR-7974 in EECs of the hypoxia group decreased by 20% and 80%, respectively. The results of flow cytometry showed that the ratio of early apoptotic cells and late apoptotic cells in the hypoxia group was higher than that in the control group (all P < 0.001). The results of Western blot showed that the expression of p53 in EECs in the hypoxia group increased, and the expression of the anti-apoptotic protein B-cell lymphoma-2 decreased compared with the control group(all P < 0.05).
      Conclusions  Hypoxic environment can induce changes in the expression profile of miRNAs in EECs, among which the down-regulation of miR-7974 is the most significant. p53 may be the target protein of miR-7974, and hypoxia-induced EEC apoptosis may be achieved by down-regulating the level of miR-7974 and promoting the expression of p53.
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    • References (21)
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