The Role of p190B RhoGAP in Breast Cancer Progression
Author Information
Author(s): McHenry Peter R, Sears James C, Herrick Matthew P, Chang Peggy, Heckman-Stoddard Brandy M, Rybarczyk Megan, Chodosh Lewis A, Gunther Edward J, Hilsenbeck Susan G, Rosen Jeffrey M, Vargo-Gogola Tracy
Primary Institution: Baylor College of Medicine
Hypothesis
If p190B is critical for mammary gland development, it might also play an important role during mammary tumorigenesis.
Conclusion
P190B RhoGAP has pro-tumorigenic functions that enhance mammary tumor formation and metastasis.
Supporting Evidence
- Exogenous p190B expression increased tumor multiplicity and metastasis.
- Non-transformed primary MECs expressing p190B showed increased adhesion to laminin and type IV collagen.
- Rac1 activity was elevated in tumors expressing exogenous p190B.
Takeaway
This study found that a protein called p190B helps breast cancer grow and spread, even though it usually stops cancer in lab tests.
Methodology
The study used tetracycline-regulatable p190B transgenic mice bred to MMTV-Neu mice to examine tumor formation and progression.
Limitations
The study did not assess the effects of p190B on tumor growth rates or apoptosis.
Statistical Information
P-Value
0.004
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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