What is high-throughput screening?

• A. Testing Selected Compounds Against A Target
• B. Computational Docking Of A Single Compound
• C. Hundreds Or Thousands Of Compounds Tested Against A Target To Find Those With The Desired Cellular Effect
• D. Clinical Trials On Humans

Answer: (C)

High-throughput screening is an experimental approach in drug discovery that rapidly tests large libraries of compounds against a biological target using automated, miniaturized assays. The idea is to screen hundreds or thousands of chemical candidates in parallel to identify those that produce the desired biological effect, such as modulating enzyme activity or altering a signaling pathway. Readouts are typically straightforward measurements like fluorescence, luminescence, or other simple signals that indicate target modulation. Because of the automation and scale, researchers can quickly generate a list of “hits” that show activity, which then undergo confirmation, dose–response testing, and further optimization. This is different from computational docking, which tests compounds in silico, and from clinical trials, which involve testing in humans. It’s also distinct from testing only a few preselected compounds, which would miss many potential actives.