Modulation of DNA topoisomerase II activity and expression in melanoma cells with acquired drug resistance
2000
DNA Topoisomerase Activity in Drug-Resistant Melanoma Cells
publication
Author Information
Author(s): H Lage, H Helmbach, M Dietel, D Schadendorf
Primary Institution: Institute of Pathology, Charité, Campus Mitte, Humboldt University Berlin
Hypothesis
The study investigates the role of DNA topoisomerases IIα and IIβ in drug-resistant melanoma cells.
Conclusion
Melanoma cells resistant to etoposide show significantly reduced Topo II activity, which is linked to their drug-resistant characteristics.
Supporting Evidence
- Melanoma cells resistant to etoposide exhibited up to tenfold reduced Topo II activity.
- The reduction of Topo II activity corresponds to an increasing degree of drug resistance.
Takeaway
Some melanoma cells can become resistant to drugs, and this study found that a specific enzyme's activity decreases as the cells become more resistant.
Methodology
The study examined the activity and expression of DNA topoisomerases in drug-resistant melanoma cells.
Digital Object Identifier (DOI)
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