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Article

Inhibition of MUS81 improves the chemical sensitivity of olaparib by regulating MCM2 in epithelial ovarian cancer

  • Authors:
    • Ailing Zhong
    • Hongqin Zhang
    • Suhong Xie
    • Minjie Deng
    • Hui Zheng
    • Yanchun Wang
    • Miaomiao Chen
    • Renquan Lu
    • Lin Guo
  • View Affiliations / Copyright

    Affiliations: Department of Clinical Laboratory, Fudan University, Shanghai Cancer Center, Shanghai, P.R. China
  • Pages: 1747-1756
    |
    Published online on: January 22, 2018
       https://doi.org/10.3892/or.2018.6229
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Abstract

Dysfunction of the DNA repair pathway contributes to tumorigenesis and drug resistance. Methyl methanesulfonate and ultraviolet sensitive gene clone 81 (MUS81), a key endonuclease in DNA repair, is generally considered a tumor suppressor; however, recent studies have revealed its tumor-promoting effect in epithelial ovarian cancer (EOC) and have shown that its overexpression is associated with cisplatin sensitization. However, the exact functional role of MUS81 and its regulation in relation to chemotherapy sensitivity remains unknown. Our previous study using protein interaction chip revealed that minichromosome maintenance complex component 2 (MCM2) is closely correlated with MUS81. This study aimed to investigate the biological effects and mechanisms of MUS81 on cellular responses to chemotherapeutic drugs. To accomplish this, we downregulated MUS81 and MCM2 in A2780 and SKOV3 ovarian cancer cells using lentivirus-mediated RNAi. Using a qPCR-based HR assay kit to detect HR efficiency. The sensitivity of MUS81 to olaparib was investigated by cell proliferation, colony formation assays and flow cytometry. The results showed that MUS81 modulates MCM2 levels as well as homologous recombination (HR) activity. Moreover, downregulation of MUS81 increased the sensitivity of EOC cells to olaparib by inducing S phase arrest and promoting apoptosis through activation of MCM2. MUS81 may be a potential novel therapeutic target for EOC.
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Copy and paste a formatted citation
Spandidos Publications style
Zhong A, Zhang H, Xie S, Deng M, Zheng H, Wang Y, Chen M, Lu R and Guo L: Inhibition of MUS81 improves the chemical sensitivity of olaparib by regulating MCM2 in epithelial ovarian cancer. Oncol Rep 39: 1747-1756, 2018.
APA
Zhong, A., Zhang, H., Xie, S., Deng, M., Zheng, H., Wang, Y. ... Guo, L. (2018). Inhibition of MUS81 improves the chemical sensitivity of olaparib by regulating MCM2 in epithelial ovarian cancer. Oncology Reports, 39, 1747-1756. https://doi.org/10.3892/or.2018.6229
MLA
Zhong, A., Zhang, H., Xie, S., Deng, M., Zheng, H., Wang, Y., Chen, M., Lu, R., Guo, L."Inhibition of MUS81 improves the chemical sensitivity of olaparib by regulating MCM2 in epithelial ovarian cancer". Oncology Reports 39.4 (2018): 1747-1756.
Chicago
Zhong, A., Zhang, H., Xie, S., Deng, M., Zheng, H., Wang, Y., Chen, M., Lu, R., Guo, L."Inhibition of MUS81 improves the chemical sensitivity of olaparib by regulating MCM2 in epithelial ovarian cancer". Oncology Reports 39, no. 4 (2018): 1747-1756. https://doi.org/10.3892/or.2018.6229
Copy and paste a formatted citation
x
Spandidos Publications style
Zhong A, Zhang H, Xie S, Deng M, Zheng H, Wang Y, Chen M, Lu R and Guo L: Inhibition of MUS81 improves the chemical sensitivity of olaparib by regulating MCM2 in epithelial ovarian cancer. Oncol Rep 39: 1747-1756, 2018.
APA
Zhong, A., Zhang, H., Xie, S., Deng, M., Zheng, H., Wang, Y. ... Guo, L. (2018). Inhibition of MUS81 improves the chemical sensitivity of olaparib by regulating MCM2 in epithelial ovarian cancer. Oncology Reports, 39, 1747-1756. https://doi.org/10.3892/or.2018.6229
MLA
Zhong, A., Zhang, H., Xie, S., Deng, M., Zheng, H., Wang, Y., Chen, M., Lu, R., Guo, L."Inhibition of MUS81 improves the chemical sensitivity of olaparib by regulating MCM2 in epithelial ovarian cancer". Oncology Reports 39.4 (2018): 1747-1756.
Chicago
Zhong, A., Zhang, H., Xie, S., Deng, M., Zheng, H., Wang, Y., Chen, M., Lu, R., Guo, L."Inhibition of MUS81 improves the chemical sensitivity of olaparib by regulating MCM2 in epithelial ovarian cancer". Oncology Reports 39, no. 4 (2018): 1747-1756. https://doi.org/10.3892/or.2018.6229
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