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The GreenScreen genotoxicity assay: a screening validation programme
P A Cahill1, A W Knight, N Billinton
1Department of Biomolecular Sciences, UMIST, Manchester M60 1QD, UK.
Mutagenesis
|February 26, 2004
Summary
The GreenScreen assay (GSA) is a novel, cost-effective yeast DNA repair test for genotoxicity screening. It offers higher throughput and lower compound use than other eukaryotic assays, detecting mutagens and clastogens.
Area of Science:
- Biotechnology
- Genotoxicity Testing
- Molecular Biology
Background:
- Existing genotoxicity assays present limitations in throughput and compound consumption.
- There is a need for cost-effective, high-throughput pre-regulatory screening assays for compound testing.
Purpose of the Study:
- To describe the GreenScreen assay (GSA), a novel yeast DNA repair reporter assay.
- To present GSA as a cost-effective, high-throughput genotoxicity screening tool for the pharmaceutical industry.
Main Methods:
- Utilized Saccharomyces cerevisiae for the GreenScreen assay (GSA).
- Developed a simple, robust assay protocol for genotoxicity screening.
- Conducted a validation study to assess assay performance.
Main Results:
- The GSA is sensitive to a broad spectrum of mutagens and clastogens.
- It offers higher throughput and lower compound consumption compared to existing eukaryotic genotoxicity assays.
- The assay detects compounds requiring metabolic activation, albeit with yeast's limited capacity.
Conclusions:
- The GreenScreen assay (GSA) provides a valuable pre-regulatory screening tool for genotoxicity.
- GSA complements bacterial assays and in silico methods for comprehensive genotoxicity assessment.
- It is suitable for applications requiring testing of numerous compounds.