Apatinib, a Novel Tyrosine Kinase Inhibitor, Promotes ROS-Dependent Apoptosis and Autophagy via the Nrf2/HO-1 Pathway
Xiaodan Sun1,2, Ji Li1, Yizhuo Li1
1Department of Pathology, College of Basic Medical Sciences, China Medical University, Shenyang 110122, China.
Abstract:
Apatinib, a new-generation oral tyrosine kinase inhibitor targeting the vascular endothelial growth factor receptor 2 (VEGFR2) signaling pathway, shows favorable therapeutic effects in various malignant tumors. However, its effect on ovarian cancer has not yet been characterized. Here, we demonstrated that apatinib inhibited ovarian cancer cell growth and migration in a concentration-dependent manner. Further, we found that apatinib could directly act on tumor cells and promote ROS-dependent apoptosis and autophagy. Mechanistically, we showed that apatinib suppressed glutathione to generate ROS via the downregulation of the nuclear factor erythroid 2-related factor 2 (Nrf2)/heme oxygenase 1 (HO-1) pathway and maintained an antitumor effect at a low level of VEGFR2 in ovarian cancer, suggesting that combination of apatinib with Nrf2 inhibitor may be a promising therapy strategy for patients with ovarian cancer.
Insights
Apatinib inhibits ovarian cancer cell growth and migration by promoting ROS-dependent cell death. Combining apatinib with Nrf2 inhibitors may offer a new therapeutic strategy for ovarian cancer.
Area of Science:
- Oncology
- Molecular Biology
- Pharmacology
Background:
- Apatinib, a VEGFR2 inhibitor, shows efficacy in various cancers.
- The role of apatinib in ovarian cancer remains uncharacterized.
Purpose of the Study:
- To investigate the effects and mechanisms of apatinib in ovarian cancer.
- To explore apatinib as a potential therapeutic strategy for ovarian cancer.
Main Methods:
- Ovarian cancer cell lines were treated with apatinib.
- Cell growth, migration, apoptosis, and autophagy were assessed.
- The Nrf2/HO-1 pathway and ROS generation were analyzed.
Main Results:
- Apatinib inhibited ovarian cancer cell growth and migration dose-dependently.
- Apatinib induced ROS-dependent apoptosis and autophagy in tumor cells.
- Apatinib suppressed glutathione, increased ROS via Nrf2/HO-1 downregulation, and maintained antitumor effects at low VEGFR2 levels.
Conclusions:
- Apatinib demonstrates direct antitumor activity in ovarian cancer by inducing ROS-mediated cell death.
- Downregulation of the Nrf2/HO-1 pathway is a key mechanism for apatinib's action.
- Combination therapy with apatinib and Nrf2 inhibitors presents a promising strategy for ovarian cancer treatment.
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