DNA Topoisomerase II Activity and Cancer Susceptibility
Author Information
Author(s): J.M. Cunningham, G.E. Francis, M.J. Holland, K.F. Pirollo, E.H. Chang
Primary Institution: The Royal Free Hospital School of Medicine; Uniformed Services University of the Health Sciences
Hypothesis
Is there a link between aberrant DNA topoisomerase II activity and inherited cancer susceptibility?
Conclusion
The study found a significant correlation between DNA topoisomerase II activity and radioresistance in a cancer-prone family.
Supporting Evidence
- Fibroblasts from the cancer-prone family showed a significant positive correlation between topoisomerase II activity and radioresistance.
- Transfection of the family's c-raf-1 gene into murine cells conveyed a radioresistant phenotype.
- Topoisomerase II activity was significantly elevated in the family's fibroblasts compared to controls.
Takeaway
Some people in a family are more likely to get cancer because their cells don't handle DNA properly, which makes them resistant to radiation.
Methodology
The study examined DNA topoisomerase activity in fibroblasts from a cancer-prone family and compared it with murine cell lines.
Limitations
The findings are based on a limited number of cell lines and may not be generalizable to all cancer-prone families.
Participant Demographics
The study involved members of a cancer-prone family with Li-Fraumeni syndrome.
Statistical Information
P-Value
0.0026
Statistical Significance
p<0.05
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