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NF-kappaB: tumor promoter or suppressor?
1Division of Gene Regulation and Expression, School of Life Sciences, MSI/WTB Complex, Dow Street, University of Dundee, Dundee, UK DD1 5EH. n.d.perkins@dundee.ac.uk
Trends in Cell Biology
|April 23, 2004
Summary
Nuclear factor-kappa B (NF-kappaB) exhibits a dual role in cancer, initially inhibiting tumor growth but later promoting it as tumor suppressors decline. This impacts NF-kappaB targeted cancer therapies.
Area of Science:
- Oncology
- Molecular Biology
- Cancer Research
Background:
- The transcription factor family NF-kappaB is recognized for its established role as a tumor promoter.
- Contrasting evidence suggests NF-kappaB can also inhibit tumor growth, indicating a complex function in cancer.
- Tumor suppressors like p53 and ARF modulate NF-kappaB activity, repressing oncogenic gene expression.
Purpose of the Study:
- To discuss the hypothesis of NF-kappaB's dual role in tumor progression.
- To explore the implications of this dual function for NF-kappaB's role in cancer.
- To consider how this dual function might affect the development of NF-kappaB-targeted anticancer therapies.
Main Methods:
- Review and synthesis of existing scientific literature on NF-kappaB function in tumorigenesis.
- Analysis of data suggesting both tumor-promoting and tumor-inhibiting roles of NF-kappaB.
- Discussion of the interplay between NF-kappaB, tumor suppressors (p53, ARF), and oncogenic gene expression.
Main Results:
- NF-kappaB appears to inhibit tumor growth in early stages of cancer.
- Loss of tumor suppressor expression due to mutations unleashes oncogenic NF-kappaB functions.
- NF-kappaB actively contributes to tumorigenesis in later stages.
Conclusions:
- NF-kappaB possesses a context-dependent, dual function in tumor progression.
- The balance between NF-kappaB and tumor suppressors dictates its oncogenic or tumor-suppressive activity.
- Understanding this duality is crucial for designing effective NF-kappaB-based cancer therapies.