A Versatile Cell Death Screening Assay Using Dye-Stained Cells and Multivariate Image Analysis.

Area of Science:

• Cell Biology
• Toxicology
• High-Throughput Screening

Background:

• Conventional cell death assays often measure only a single cell death pathway.
• Accurate quantification of cell death in high-throughput screening remains challenging.

Purpose of the Study:

• To develop a novel, cost-effective dye-based method for quantifying cell death in image-based screens.
• To enable accurate assessment of cytotoxicity for diverse compounds without requiring extensive positive controls.

Main Methods:

• Utilized a combination of nonyl acridine orange (a red dye) and a nuclear stain.
• Employed multivariate analysis of micrographs to quantify cell death.
• Trained a multivariate classifier using a single known cytotoxic agent.

Main Results:

• Successfully quantified cell death induced by various agonists, even without a positive control.
• Accurately determined cytotoxicity for mechanistically unrelated compounds, enabling dose-response curve generation.
• Distinguished cell death from cell stress and identified cytotoxic kinase inhibitors with high accuracy (1 false positive out of 11).

Conclusions:

• The novel dye-based assay is simple, robust, and suitable for live cell screening.
• This method offers a significant advancement for identifying toxic compounds in drug discovery.
• Enables accurate, high-throughput assessment of cell death and cytotoxicity.