A novel automatic quantification method for high-content screening analysis of DNA double strand-break response

Area of Science:

• Cell Biology
• Molecular Biology
• Biotechnology

Background:

• High-content screening is vital for DNA damage response studies.
• Quantifying DNA double-strand breaks (DSBs) is crucial but conventional methods like γH2AX foci counting are imprecise and labor-intensive.
• A need exists for a robust, automated method for DSB quantification.

Purpose of the Study:

• To develop and validate a novel, automated method for quantifying DSBs.
• To improve the accuracy, reproducibility, and efficiency of DSB measurement in cellular studies.
• To provide a standardized tool for assessing DSB response inhibition.

Main Methods:

• The new method employs automatic image cropping, foci segmentation, and fluorescent intensity measurement.
• It incorporates co-localization analysis for standardizing DSB response inhibition measurements.
• The system requires minimal operator input with only one preset parameter.

Main Results:

• The automated method demonstrated superior accuracy by detecting a higher percentage difference in foci formation between cells compared to conventional techniques.
• It successfully quantified the inhibitory effects on DSB response with statistical significance (p=0.000).
• Operator-dependent variations were minimized due to the simplified parameter setting.

Conclusions:

• The developed method offers a reliable, automated, and simple alternative for DSB quantification.
• Its enhanced accuracy and efficiency make it suitable for quantitative fluorescence imaging and high-content screening.
• This tool has significant potential for identifying compounds and factors involved in the DNA double-strand break response.