Abstract
Aim
The present study aims to examine the effects of apatinib combined with autophagy inhibitor 3-Methyladenine (3-MA) on the proliferation and apoptosis of human uterine sarcoma in FU-MMT-1 and MES-SA cells and its tumor inhibition effect in xenograft model of uterine sarcoma.
Methods
Different concentrations of 3-MA and apatinib were used to treat the uterine sarcoma cell lines (MES-SA and FU-MMT-1 cells). The cell viability was detected by CCK8 method. Flow cytometry was used to detect the apoptosis and cell cycle. Wound closure assay and Transwell assay were performed to measure the migration ability of cells. Western blot was used to determine the apoptosis proteins and autophagy proteins. A nude mice sarcoma xenograft model was established and treated with apatinib alone, 3-MA alone, or combined incubation of them. Tumor size of xenograft and the mice survival rate were measured.
Results
Combination of 3-MA and apatinib significantly inhibited the proliferation and migration ability, but increased the apoptosis rate of uterine sarcoma cells compared to apatinib. The combination of 3-MA and apatinib significantly limited the tumor size of xenograft and increased the survival rate of mice compared to apatinib alone. Apatinib inhibited the PI3K/Akt/mTOR pathway, while 3-MA and the combination of 3-MA and apatinib significantly activated the PI3K/Akt/mTOR pathway and inhibited autophagy. Combination of 3-MA and apatinib increased apoptosis compared to apatinib alone. The expression of VEGFR-2 was not impacted by 3-MA.
Conclusion
Combination of apatinib and autophagy inhibitor 3-MA significantly inhibited the growth and migration of uterine sarcoma cells and xenograft. Autophagy inhibition may increase the antitumor effect of apatinib via the PI3K/Akt/mTOR pathway.
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Data availability statement
The datasets generated during and/or analysed during the current study are available from the corresponding author on reasonable request.
Abbreviations
- 3-MA:
-
3-Methyladenine
- CCK8:
-
Cholecystokinin 8
- PI3K:
-
Phosphatidylinositol 3-kinase
- mTOR:
-
Mammalian Target of Rapamycin
- VEGF:
-
Endothelial growth factor
- VEGFR-2:
-
Endothelial growth factor receptor 2
- FBS:
-
Fetal bovine serum
- DMEM:
-
Dulbecco's Modified Eagle Medium
- SD:
-
Standard deviation
- SDS:
-
Sodium dodecyl sulfate
- GAPDH:
-
Glyceraldehyde-3-phosphate dehydrogenase
- APA:
-
Apatinib
- ANOVA:
-
One-way analyses of variance
- ABCB1:
-
P-glycoprotein 1
- ABCG2:
-
ATP-binding cassette transporter G2
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The work was supported by Hebei Provincial Department of Science and Technology (No. 182777246).
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Shucheng Chen performed the study and wrote the paper; Lan Yao designed the study, revised the paper and provided the funding.
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The study was approved by Ethics Committee of Fourth Hospital of Hebei Medical University (No. FHHMU-2018265).
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Chen, S., Yao, L. Autophagy inhibitor potentiates the antitumor efficacy of apatinib in uterine sarcoma by stimulating PI3K/Akt/mTOR pathway. Cancer Chemother Pharmacol 88, 323–334 (2021). https://doi.org/10.1007/s00280-021-04291-5
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DOI: https://doi.org/10.1007/s00280-021-04291-5