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Chinese Journal of Cell and Stem Cell(Electronic Edition) ›› 2021, Vol. 11 ›› Issue (02): 90-98. doi: 10.3877/cma.j.issn.2095-1221.2021.02.004

Special Issue:

• Original Research • Previous Articles     Next Articles

Synergistic anticancer effects of apatinib and nab-paclitaxel in MDA-MB-231 breast cancer cell line

Jing Li1,(), Zhifen Wang1, Xiaohui Zhang2, Gengwu Yang1, Zheng Liu1, Guangxu Niu3   

  1. 1. Third Department of Oncology, Handan Central Hospital, Handan 056000, China
    2. Department of Hematology, Handan Central Hospital, Handan 056000, China
    3. Department of Pathology, Handan Central Hospital, Handan 056000, China
  • Received:2019-09-08 Online:2021-04-01 Published:2021-06-07
  • Contact: Jing Li

Abstract:

Objective

To elucidate the molecular mechanisms of apatinib and nab-Paclitaxel in inducing apoptosis of MDA-MB-231 breast cancer cells.

Methods

MDA-MB-231 cells were treated with apatinib and nab-Paclitaxel alone or together and named: control group (0.1 ﹪ DMSO treatment) ; 10 μmol/L apatinib treatment group (APA group) ; 5, 10, 15, 20 nmol/L nab-Paclitaxel treatment group (Nab-p 5 groups, Nab-p 10 groups, Nab-p 15 groups and Nab-p 20 groups) and 10 μmol/L apatinib combined with 5, 10, 15, 20 nmol/L nab-Paclitaxel treatment group (APA Nab-p 5 groups, APA Nab-p 10 groups, APA Nab-p 15 groups and APA Nab-p 20 groups) . The cytotoxic activity induced by apatinib and albumin-bound paclitaxel on MDA-MB-231 cells was determined by a lactate dehydrogenase release assay. Flow cytometry was used to quantify apoptosis in different treatment groups. Effects of different intervention methods on mitochondrial membrane potential change (ΔΨm) of MDA-MB-231 cells were examined by JC-1 staining. Caspase-8 and Caspase-9 activities were detected by FAM-FLICA fluorescence imaging. The effects of apatinib and albumin-bound paclitaxel on DNA damage in non-tumorigenic epithelial cell line MCF-10A were evaluated by comet assay. Student's t test or one-way ANOVA was used for comparison between two groups, and Tukey post-test was used for comparison within multiple groups.

Results

Cytotoxicity test results showed that the MDA-MB-231 cell death rate in the Nab-p 20 group was close to 90 ﹪ at 24 h, and the difference was extremely significant compared with the control group (P < 0.001) . After treatment for 24 h and 48 h, about 85 ﹪ and 95 ﹪ of cell deaths were detected in the APA+Nab-p 5 group and APA+Nab-p 10 group respectively, which showed a significantly difference compared with the single-drug treatment group (Nab-p 5 group and Nab-p 10 group) (P < 0.001) . The results of flow cytometry showed that the apoptotic rate of APA+Nab-p5 (76.11±1.14) and APA+Nab-p10 (89.4±1.07) groups were significantly increased (P < 0.05) compared with the Nab-p5 (31.8±1.48) and Nab-p10 (33.25±1.77) groups. The results of mitochondrial membrane potential test showed that only depolarized cells in APA group (78.33±1.11) and Nab-p 10 group (46.74±1.75) was increased significantly at 24 h (all P < 0.01) compared with the control group (12.35±1.05) , in the single-drug treatment group, while in the combined treatment group, the depolarised cells in the APA+Nab-p 5 (68.47±1.94) and APA+Nab-p 10 group (90.03±1.79) also increased significantly (P < 0.05) . FAM-FLICA fluorescence imaging results showed that compared with the single treatment group, the caspase-8 and caspase-9 proteins in the combination group of apatinib and nab-Paclitaxel were highly activated. Comet assay analysis showed that the intervention of apatinib and nab-Paclitaxel did not significantly affect the DNA integrity of MCF-10A non-tumorigenic epithelial cell line.

Conclusion

Combined apatinib with nab-paclitaxel induces apoptosis through intrinsic mitochondrial function perturbation and extrinsic caspase activation in triple-negative breast cancer cells MDA-MB-231, and may exhibit a synergistic anticancer effect.

Key words: Apatinib, Albumin-bound paclitaxel, Synergistic effect, Breast cancer, Apoptosis

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