FOXO3a Suppresses Estrogen-Dependent Breast Cancer Growth
Author Information
Author(s): Zou Yiyu, Tsai Wen-Bin, Cheng Chien-Jui, Hsu Chiun, Chung Young Min, Li Pao-Chen, Lin Sue-Hwa, Hu Mickey CT
Primary Institution: University of Texas MD Anderson Cancer Center
Hypothesis
Does FOXO3a interact with estrogen receptors and inhibit their activity in breast cancer cells?
Conclusion
FOXO3a plays a critical role in suppressing estrogen-dependent breast cancer cell growth and tumorigenesis.
Supporting Evidence
- FOXO3a interacted with ER-α and ER-β proteins in breast cancer cells.
- FOXO3a inhibited estrogen-dependent transcriptional activities.
- Over-expression of FOXO3a suppressed tumor growth in mice.
- FOXO3a upregulated cyclin-dependent kinase inhibitors.
- Silencing FOXO3a promoted tumorigenesis in breast cancer cells.
Takeaway
FOXO3a helps stop breast cancer cells from growing by blocking the signals from estrogen that usually help them grow.
Methodology
The study used co-immunoprecipitation, immunoblotting, luciferase reporter assays, and in vivo tumorigenesis models in mice.
Potential Biases
Potential bias in the selection of cell lines and animal models used.
Limitations
The study primarily focused on one cell line and may not fully represent all breast cancer types.
Participant Demographics
The study involved athymic nude mice for in vivo experiments.
Statistical Information
P-Value
0.002
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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