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Single cell trapping and DNA damage analysis using microwell arrays
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Single cell trapping and DNA damage analysis using microwell arrays
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Journal Article
Single cell trapping and DNA damage analysis using microwell arrays
2010
Overview
With a direct link to cancer, aging, and heritable diseases as well as a critical role in cancer treatment, the importance of DNA damage is well-established. The intense interest in DNA damage in applications ranging from epidemiology to drug development drives an urgent need for robust, high throughput, and inexpensive tools for objective, quantitative DNA damage analysis. We have developed a simple method for high throughput DNA damage measurements that provides information on multiple lesions and pathways. Our method utilizes single cells captured by gravity into a microwell array with DNA damage revealed morphologically by gel electrophoresis. Spatial encoding enables simultaneous assays of multiple experimental conditions performed in parallel with fully automated analysis. This method also enables novel functionalities, including multiplexed labeling for parallel single cell assays, as well as DNA damage measurement in cell aggregates. We have also developed 24- and 96-well versions, which are applicable to high throughput screening. Using this platform, we have quantified DNA repair capacities of individuals with different genetic backgrounds, and compared the efficacy of potential cancer chemotherapeutics as inhibitors of a critical DNA repair enzyme, human AP endonuclease. This platform enables high throughput assessment of multiple DNA repair pathways and subpathways in parallel, thus enabling new strategies for drug discovery, genotoxicity testing, and environmental health.
Publisher
National Academy of Sciences,National Acad Sciences
Subject
/ Cancer
/ Cells
/ Comet Assay - instrumentation
/ Comets
/ DNA
/ DNA-(Apurinic or Apyrimidinic Site) Lyase - antagonists & inhibitors
/ drugs
/ Enzyme Inhibitors - pharmacology
/ gravity
/ Humans
/ Imaging
/ Oligonucleotide Array Sequence Analysis - instrumentation
