Volume 44 Issue 12
Dec.  2023
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Article Navigation >  Journal of Kunming Medical University  > 2023  >  44(12): 25-31
Yiming TANG, Qing FENG, Yu CHEN, Jie YU, Yiming LU, Dan WANG. Application of Holistic Nursing Model Based on Delphi in Patients with AMI[J]. Journal of Kunming Medical University.
Citation: Yangyang LIAN, Hongping YUE, Ya DUAN, Hongwen HU, Fang LUO. The Role of miRNA-15a/16 in Regulating Bmi-1 Protein in Ovarian Cancer Resistance to Cisplatin Chemotherapy[J]. Journal of Kunming Medical University, 2023, 44(12): 25-31. doi: 10.12259/j.issn.2095-610X.S20231204
shu

The Role of miRNA-15a/16 in Regulating Bmi-1 Protein in Ovarian Cancer Resistance to Cisplatin Chemotherapy

doi: 10.12259/j.issn.2095-610X.S20231204

  • Dept. of Gynecology，The 3rd People’s Hospital of Yunnan Province，Kunming Yunnan 650200，China

  • Received Date: 2023-07-01
    Available Online: 2023-12-19
  • Publish Date: 2023-12-25
    Abstract
  •   Objective  To investigate the mechanisms of miRNA-15a and miRNA-16 in the process of reversing cisplatin resistance in ovarian cancer.   Methods  Human ovarian cancer cisplatin-resistant cell lines CoC1/DDP were transfected with miRNA-15a and miRNA-16 mimics and treated with cisplatin. qRT-PCR was used to detect the expression levels of miRNA-15a and miRNA-16 in normal CoC1/DDP cell group, cisplatin treated group, negative control group, miRNA-15a transfected group, miRNA-16 transfected group and overexpressed Bmi-1 plasmid. Western blot was used to detect the expression level of Bmi-1 in each group, CCK-8 and Annexin V/PI were used to detect cell survival and apoptosis, and γ-H2AX immunofluorescence was used to detect cell apoptosis.   Results  The CoC1/DDP ovarian cancer cell line shows low expression of miRNA-15a and miRNA-16, and high expression of Bmi-1 protein, which makes it resistant to cisplatin. When the levels of miRNA-15a and miRNA-16 are overexpressed, the Bmi-1 protein decreases（P < 0.05）, leading to a decrease in cell survival rate（P < 0.05）, a significant increase in DNA apoptosis（P < 0.05）, and more severe DNA damage（P < 0.05）. Overexpression of Bmi-1 plasmid can increase cell viability（P < 0.05） and reduce the rate of cell apoptosis（P < 0.05）.   Conclusion  The Bmi-1 protein may be a target for the regulation of miRNA-15a and miRNA-16, and overexpression of miRNA-15a and miRNA-16 can increase the sensitivity of ovarian cancer cells to cisplatin by reducing the Bmi-1 protein. This provides a new idea for predicting molecular markers of cisplatin resistance in ovarian cancer and overcoming drug resistance targets in ovarian cancer.
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