How Breast Cancer Cells Activate STAT3 Through Signaling
Author Information
Author(s): Lieblein Jacqueline C, Ball Sarah, Hutzen Brian, Sasser A Kate, Lin Huey-Jen, Huang Tim HM, Hall Brett M, Lin Jiayuh
Primary Institution: The Ohio State University
Hypothesis
The tumor microenvironment plays a role in the activation of STAT3 in breast epithelial cells.
Conclusion
STAT3 phosphorylation in breast epithelial cells can be stimulated by paracrine signaling through soluble factors from breast cancer cells and associated fibroblasts.
Supporting Evidence
- Conditioned media from breast cancer cells can induce STAT3 activation in non-cancerous breast epithelial cells.
- IL-6 levels correlate with increased STAT3 phosphorylation.
- Blocking IL-6 or its receptor can inhibit STAT3 activation.
- Soluble factors from breast cancer cells can enhance cell proliferation in normal breast cells.
Takeaway
Breast cancer cells can send signals to normal breast cells, making them more active and possibly leading to cancer growth.
Methodology
Conditioned media from breast cancer cell lines was used to treat normal breast epithelial cells, and the effects on STAT3 activation were measured using Western blot and ELISA.
Limitations
The study does not explore all possible soluble factors that may influence STAT3 activation.
Digital Object Identifier (DOI)
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