Nongenomic Estrogen Signaling in Breast Cancer Cells
Author Information
Author(s): Lim Kheng Tian, Cosgrave Niamh, Hill Arnold David, Young Leonie S
Primary Institution: School of Medicine and Medical Science, St. Vincent's University Hospital, Dublin, Ireland
Hypothesis
The study investigates the role of the angiotensin II receptor AT1 in mediating nongenomic estrogen signaling in breast cancer cells.
Conclusion
The findings suggest that estrogen can activate early cell survival mechanisms in breast cancer cells through the AT1 receptor in an estrogen receptor-independent manner.
Supporting Evidence
- Estrogen and EGF together increased cell proliferation in both ER-positive and ER-negative breast cancer cells.
- The AT1 receptor was found to be expressed in the cell membrane of breast tumor epithelial cells.
- Knockdown of AT1 receptor expression reduced estrogen-induced Raf phosphorylation in ER-negative cells.
Takeaway
Estrogen can help breast cancer cells grow even without the usual estrogen receptor, using a different pathway involving a receptor called AT1.
Methodology
The study used ER-positive and ER-negative breast cancer cell lines and primary breast cancer cultures, assessing cell proliferation and signaling pathways through various assays.
Statistical Information
P-Value
p<0.05
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
Want to read the original?
Access the complete publication on the publisher's website