Arctigenin Induces Mitochondrial Apoptosis in Ovarian Cancer Cells by Downregulating Bcl2L12 Expression
Ying Yang1,2, Peng Cui1, Weiyan Chen1
1Key Laboratory of Ministry of Education for TCM Viscera-State Theory and Applications, Liaoning University of Traditional Chinese Medicine, Shenyang 110847, China.
Introduction:
Ovarian cancer remains one of the most lethal gynecological malignancies because of late diagnosis, drug resistance, and limited treatment efficacy. This study explored the anti-apoptotic role of BCL2-like protein 12 (BCL2L12) and whether arctigenin induces apoptosis by targeting BCL2L12.
Methods:
SK-OV-3 and OVCAR-3 ovarian cancer cells were subjected to BCL2L12 knockdown or overexpression. Cell viability, proliferation, and apoptosis were evaluated by CCK-8, colony formation, and Annexin V/PI flow cytometry. Mitochondrial membrane potential and reactive oxygen species (ROS) levels were assessed using JC-1 and DCFH-DA staining, respectively, and apoptosis- and autophagy-related proteins were examined by western blotting. Public databases (TCGA, GTEx, CSIOVDB, Kaplan-Meier Plotter) were used to evaluate BCL2L12 expression and prognosis.
Results:
BCL2L12 was markedly upregulated in ovarian cancer and correlated with advanced stage and poor survival. Silencing BCL2L12 reduced cell growth, disrupted mitochondrial homeostasis, increased ROS accumulation, and enhanced caspase-3/7-dependent apoptosis while inhibiting autophagy. Arctigenin inhibited cell proliferation, downregulated BCL2L12, and induced mitochondrial apoptosis accompanied by ROS elevation and caspase-3/7 activation, whereas BCL2L12 overexpression attenuated these effects.
Discussion:
BCL2L12 acts as an anti-apoptotic factor in ovarian cancer by maintaining mitochondrial integrity and suppressing caspase-3/7 activation. Arctigenin overcomes this survival advantage by suppressing BCL2L12 and triggering mitochondrial apoptosis. Limitations include validation only in two cell lines and the lack of direct enzymatic assays for caspase-3/7 activity.
Conclusion:
Arctigenin induces mitochondrial apoptosis in ovarian cancer by downregulating BCL2L12, supporting its potential as a low-toxicity therapeutic candidate.
Insights
Arctigenin induces apoptosis in ovarian cancer by targeting BCL2-like protein 12 (BCL2L12), a key factor in cancer cell survival. This study highlights arctigenin
Area of Science:
- Oncology
- Molecular Biology
- Biochemistry
Background:
- Ovarian cancer is a leading cause of gynecological cancer deaths due to late diagnosis and treatment resistance.
- BCL2-like protein 12 (BCL2L12) plays an anti-apoptotic role, contributing to treatment challenges in ovarian cancer.
- Understanding BCL2L12's function is crucial for developing novel therapeutic strategies against ovarian cancer.
Purpose of the Study:
- To investigate the anti-apoptotic role of BCL2L12 in ovarian cancer.
- To determine if arctigenin induces apoptosis by targeting BCL2L12 in ovarian cancer cells.
- To evaluate the therapeutic potential of arctigenin as a BCL2L12 inhibitor.
Main Methods:
- BCL2L12 knockdown and overexpression in SK-OV-3 and OVCAR-3 ovarian cancer cell lines.
- Assays for cell viability, proliferation, apoptosis, mitochondrial membrane potential, and reactive oxygen species (ROS).
- Western blotting for apoptosis- and autophagy-related proteins and analysis of public databases for BCL2L12 expression and prognosis.
Main Results:
- BCL2L12 is upregulated in ovarian cancer, correlating with advanced stage and poor prognosis.
- BCL2L12 silencing reduced cell growth, increased apoptosis, and inhibited autophagy.
- Arctigenin inhibited proliferation, downregulated BCL2L12, and induced apoptosis; BCL2L12 overexpression counteracted these effects.
Conclusions:
- BCL2L12 functions as an anti-apoptotic factor in ovarian cancer by preserving mitochondrial integrity.
- Arctigenin effectively induces apoptosis by suppressing BCL2L12 and activating caspase-3/7.
- Arctigenin demonstrates potential as a low-toxicity therapeutic agent for ovarian cancer by targeting BCL2L12.
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