Comparative Analysis of E2F Family Member Oncogenic Activity
Author Information
Author(s): Chen Chunxia, Wells Andrew D.
Primary Institution: Joseph Stokes, Jr. Research Institute, The Children's Hospital of Philadelphia
Hypothesis
The study aims to systematically compare the oncogenic capacity of E2F family members 1 through 6.
Conclusion
The E2F family members can be divided into three groups based on their oncogenic capacity: strong oncogenes (E2F2 and E2F3a), weak or neutral genes (E2F1 and E2F6), and anti-oncogenes (E2F4 and E2F5).
Supporting Evidence
- E2F2 and E2F3 promote serum- and contact-independent growth of normal fibroblasts.
- E2F4 and E2F5 negatively impact fibroblast growth.
- E2F1 and E2F6 exhibit weak or no oncogenic capacity compared to empty vector-transduced cells.
Takeaway
This study looked at how different E2F proteins affect cell growth and cancer. Some help cells grow too much, while others can stop growth.
Methodology
The researchers over-expressed E2F family members in 3T3 fibroblasts and assessed their growth under low serum conditions and their ability to form colonies in soft agar.
Limitations
The study's results regarding E2F1 and E2F6 may be difficult to interpret due to background transforming activity of the retroviral vector used.
Digital Object Identifier (DOI)
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