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Daidzein induces MCF-7 breast cancer cell apoptosis via the mitochondrial pathway
1Department of Oncology, The Third College Hospital of Harbin Medical University, Harbin, People's Republic of China.
Background:
In order to study the anticancer effects and cellular apoptosis pathways induced by daidzein.
Materials And Methods:
We used the human MCF-7 breast cancer cell line as a model and examined the apoptosis by Hoechst-propidium iodide staining fluorescence imaging and flow cytometry.
Results:
Our data indicated that daidzein induces antiproliferative effects in a concentration- and time-dependent manner. We demonstrated that daidzein-induced apoptosis in MCF-7 cells was initiated by the generation of reactive oxygen species (ROS). Furthermore, we showed that this daidzein-induced ROS generation was accompanied by disruption of mitochondrial transmembrane potential, down-regulation of bcl-2, and up-regulation of bax, which led to the release of cytochrome C from the mitochondria into the cytosol, which, in turn, resulted in the activation of caspase-9 and caspase-7, and ultimately in cell death. The induction of the mitochondrial caspase-dependent pathway was confirmed by pretreatment with pan-caspase inhibitor z-VAD-fmk and antioxidant N-acetyl-L-cysteine.
Conclusion:
Accordingly, daidzein could induce breast cancer cell apoptosis through the mitochondrial caspase-dependent cell death pathway.
Insights
Daidzein exhibits anticancer properties by triggering programmed cell death (apoptosis) in breast cancer cells. This process involves reactive oxygen species generation and the mitochondrial pathway, leading to cancer cell death.
Area of Science:
- Biochemistry
- Cell Biology
- Pharmacology
Background:
- Daidzein, a soy isoflavone, is investigated for its potential anticancer effects.
- Understanding the specific cellular mechanisms of daidzein-induced cancer cell death is crucial.
Purpose of the Study:
- To elucidate the anticancer effects of daidzein.
- To investigate the cellular apoptosis pathways induced by daidzein in breast cancer.
Main Methods:
- Utilized the human MCF-7 breast cancer cell line.
- Assessed apoptosis using Hoechst-propidium iodide staining and flow cytometry.
Main Results:
- Daidzein demonstrated dose- and time-dependent antiproliferative effects.
- Apoptosis was initiated by reactive oxygen species (ROS) generation, mitochondrial potential disruption, and altered bcl-2/bax expression.
- This led to cytochrome C release, caspase-9 and -7 activation, and cell death, confirmed by caspase inhibitors and antioxidants.
Conclusions:
- Daidzein induces breast cancer cell apoptosis via the mitochondrial caspase-dependent pathway.
- The findings support daidzein as a potential agent for breast cancer therapy targeting apoptosis.
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