Dominant negative knockout of p53 abolishes ErbB2-dependent apoptosis and permits growth acceleration in human breast cancer cells
2002
How p53 Affects Breast Cancer Cell Growth
publication
Evidence: moderate
Author Information
Author(s): Huang G C, Hobbs S, Walton M, Epstein R J
Primary Institution: King's College School of Medicine
Hypothesis
Does the dominant negative knockout of p53 affect ErbB2-dependent apoptosis and growth in breast cancer cells?
Conclusion
The study concludes that wild-type p53 limits the survival of ErbB2-overexpressing breast cancer cells.
Supporting Evidence
- MCF7 breast cancer cells with wild-type p53 showed increased apoptosis when ErbB2 was overexpressed.
- Dominant negative p53 transfectants exhibited reduced apoptosis and enhanced growth compared to parental cells.
- ErbB2 expression was associated with increased levels of p53 and Myc, and decreased levels of Bcl2.
Takeaway
This study shows that when a specific gene called p53 is not working properly, breast cancer cells can grow faster and avoid dying.
Methodology
The study involved creating stable and transient transfectants of MCF7 breast cancer cells to analyze the effects of ErbB2 and p53 on cell growth and apoptosis.
Digital Object Identifier (DOI)
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