Controlling Breast Cancer Growth with Tamoxifen and Oestradiol
Author Information
Author(s): Y. Iino, D.M. Wolf, S.M. Langan-Fahey, D.A. Johnson, M. Ricchio, M.E. Thompson, V.C. Jordan
Primary Institution: University of Wisconsin Comprehensive Cancer Center
Hypothesis
Can high concentrations of oestradiol reverse the growth inhibitory action of tamoxifen on MCF-7 breast cancer cells?
Conclusion
High levels of oestradiol can partially reverse the growth-inhibitory effects of tamoxifen on MCF-7 tumors in athymic mice.
Supporting Evidence
- Tamoxifen inhibits the oestradiol stimulated growth of MCF-7 cells in athymic mice.
- High serum levels of tamoxifen were achieved with sustained release preparations.
- Tamoxifen's growth inhibitory action can be partially reversed by increasing serum oestradiol concentrations.
Takeaway
This study shows that giving more oestradiol can make tamoxifen less effective at stopping breast cancer growth in mice.
Methodology
MCF-7 breast tumors were implanted in athymic mice, which were then treated with varying doses of oestradiol and tamoxifen to assess tumor growth.
Limitations
The study was conducted in a mouse model, which may not fully replicate human responses.
Participant Demographics
Athymic nude mice were used in the experiments.
Statistical Information
P-Value
p<0.05
Statistical Significance
p<0.05
Want to read the original?
Access the complete publication on the publisher's website