Cytotoxic Profiling of Annotated and Diverse Chemical Libraries Using Quantitative High-Throughput Screening

Area of Science:

• Drug Discovery and Development
• Chemical Biology
• Toxicology

Background:

• Cell-based phenotypic screening identifies drug candidates, but many fail due to cytotoxicity.
• Early cytotoxicity profiling of screening libraries is essential for successful drug development.
• Identifying and avoiding cytotoxic compounds increases the likelihood of candidate success.

Purpose of the Study:

• To assess the cell-based cytotoxicity of large compound libraries.
• To analyze screening outcomes, hit rates, pan-activity, and selectivity.
• To identify primary targets and pathways associated with cell death.

Main Methods:

• High-throughput screening of nearly 10,000 National Institutes of Health, National Center for Advancing Translational Sciences annotated library compounds.
• Cytotoxicity profiling of over 100,000 diversity library compounds.
• Testing against four normal cell lines (HEK 293, NIH 3T3, CRL-7250, HaCat) and one cancer cell line (KB 3-1).

Main Results:

• Large-scale profiling of screening libraries for cytotoxicity was performed.
• Analysis included overall screening outcomes, hit rates, pan-activity, and selectivity.
• Primary targets and mechanistic pathways associated with cell death were examined for the annotated library.

Conclusions:

• This study provides the first large-scale (>100,000 compounds) cytotoxicity profiling in both normal and cancer cell lines.
• The generated data serves as a valuable resource for the scientific community.
• Insights into cytotoxic compounds in screening libraries aid in avoiding them during high-throughput screening.