Cytotoxic Profiling of Korea Chemical Bank Diversity Library

Area of Science:

• Drug discovery and development
• Toxicology and pharmacology
• Chemical biology

Background:

• Cytotoxicity profiling is essential in early drug discovery to identify toxic compounds.
• The Korea Chemical Bank (KCB) diversity library was curated using virtual screening, clustering, and druggability assessment.

Purpose of the Study:

• To perform cytotoxicity profiling of the KCB diversity library.
• To identify compounds with potential toxic effects for early-stage drug discovery.

Main Methods:

• A subset of 5181 compounds from the KCB library was screened using the WST-1 assay.
• Screening was conducted in five mammalian cell lines (HEK293, HFL1, HepG2, NIH3T3, CHOK1) at 30 µM and 10 µM concentrations.
• Cytotoxicity was defined as >50% inhibition at 30 µM after 48 hours of incubation.

Main Results:

• 17 compounds exhibited consistent cytotoxicity across all five tested cell lines.
• Cytotoxic compounds were characterized by higher lipophilicity (ALogP/LogD) and more aromatic rings (AR).
• The majority of the KCB diversity library compounds were found to be non-cytotoxic.

Conclusions:

• The KCB diversity library is largely composed of non-cytotoxic compounds.
• Effective pre-filtering of physicochemical properties during library design minimized inherent toxicity.
• This study provides valuable data for further drug discovery efforts utilizing the KCB library.