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Detection of Mitochondria Membrane Potential to Study CLIC4 Knockdown-induced HN4 Cell Apoptosis In Vitro
Published on: July 17, 2018
Equol induces mitochondria-mediated apoptosis of human cervical cancer cells
Eun Young Kim1, Jin Young Shin1, Young-Ja Park1
1College of Pharmacy, Sookmyung Women's University, Seoul, Republic of Korea.
Background/Aim:
The present study aimed to investigate anticancer properties of equol and demonstrate its underlying mechanisms of action in human cervical cancer HeLa cells.
Materials And Methods:
Inhibition of cell viability was examined by 3-(4,5-dimethylthiazoly-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay. Apoptosis was evaluated by observation of apoptotic cell morphology, and an increase of annexin-V(+) cells. Western blotting was used to examine apoptosis-related proteins. Flow cytometry was used to measure mitochondrial membrane potential (MMP) and reactive oxygen species (ROS).
Results:
Equol treatment inhibited HeLa cell proliferation in dose- and time-dependent manner. Equol-induced apoptotic cell death was accompanied by the activation of caspases, and alteration of MMP and mitochondrial membrane proteins; equol also rapidly triggered ROS production. Pre-treatment with N-acetylcysteine blocked loss of MMP, caused increase of Bcl-2-associated X protein (Bax)/B-cell lymphoma 2 (Bcl-2) ratio, caspase-8 activation, and apoptosis induced by equol.
Conclusion:
Equol is a potential anticancer agent against HeLa, with possible mechanisms involved in ROS generation and mitochondrial membrane alteration.
Insights
Equol demonstrates anticancer effects against cervical cancer cells by inducing apoptosis and altering mitochondrial function. This natural compound shows promise as a therapeutic agent, warranting further investigation.
Area of Science:
- Biochemistry
- Cell Biology
- Pharmacology
Background:
- Cervical cancer remains a significant global health concern.
- Investigating novel therapeutic agents is crucial for improving treatment outcomes.
- Equol, a metabolite of isoflavones, possesses potential biological activities.
Purpose of the Study:
- To explore the anticancer properties of equol in human cervical cancer (HeLa) cells.
- To elucidate the molecular mechanisms underlying equol's cytotoxic effects.
- To evaluate equol's impact on cell viability, apoptosis, and mitochondrial function.
Main Methods:
- Cell viability assessed using MTT assay.
- Apoptosis evaluated via morphological changes and Annexin-V staining.
- Western blotting analyzed apoptosis-related proteins.
- Mitochondrial membrane potential (MMP) and reactive oxygen species (ROS) measured by flow cytometry.
Main Results:
- Equol inhibited HeLa cell proliferation in a dose- and time-dependent manner.
- Equol induced apoptosis, evidenced by caspase activation and altered mitochondrial proteins.
- Equol triggered reactive oxygen species (ROS) production and mitochondrial membrane potential (MMP) disruption.
- N-acetylcysteine pre-treatment partially reversed equol-induced effects, highlighting ROS and mitochondrial pathways.
Conclusions:
- Equol exhibits significant anticancer potential against human cervical cancer HeLa cells.
- The mechanisms involve the generation of reactive oxygen species (ROS) and alterations in mitochondrial membrane potential.
- Equol represents a promising candidate for further development as an anticancer agent.
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