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Characterizing DNA Repair Processes at Transient and Long-lasting Double-strand DNA Breaks by Immunofluorescence Microscopy
Published on: June 8, 2018
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High-throughput detection of DNA double-strand breaks using image cytometry
Tyler L Fowler1, Alison M Bailey2, Bryan P Bednarz3
1Departments of Medical Physics, School of Medicine and Public Health, University of Wisconsin, Madison, WI.
Biotechniques
|January 22, 2015
Summary
Manual counting of DNA double-strand breaks is tedious and biased. This study introduces a new high-throughput method using automated image cytometry for objective and cost-effective γH2AX analysis.
Area of Science:
- Molecular Biology
- Cell Biology
- Biotechnology
Background:
- Assessing DNA double-strand breaks (DSBs) is crucial for understanding genomic instability.
- γH2AX foci detection via manual immunofluorescence microscopy is the standard method.
- Manual counting is time-consuming, labor-intensive, and prone to selection bias.
Purpose of the Study:
- To develop a novel, high-throughput method for DSB assessment.
- To replace manual foci counting with an automated, objective approach.
- To improve the efficiency and reliability of γH2AX analysis.
Main Methods:
- Utilized automated image cytometry for γH2AX immunofluorescence.
- Measured average cellular γH2AX fluorescence intensity.
- Developed a high-throughput screening approach.
Main Results:
- The automated method provides expedient and high-throughput γH2AX analysis.
- Image cytometry offers an objective alternative to manual foci counting.
- The technique is cost-effective for large-scale DSB assessment.
Conclusions:
- Automated image cytometry is a superior method for γH2AX analysis.
- This novel technique enhances the study of DNA double-strand breaks.
- The method offers significant advantages in speed, objectivity, and cost.
