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Miniaturization of a Mammalian Cell-Based Assay: Luciferase Reporter Gene Readout in a 3 Microliter 1536-Well Plate

DuPont Pharmaceuticals Company, Wilmington, DE

Ilona Kariv

DuPont Pharmaceuticals Company, Wilmington, DE

Kevin R. Oldenburg

DuPont Pharmaceuticals Company, Wilmington, DE

The combined efforts of the fields of combinatorial chemistry and genomics have significantly increased the number of compounds and therapeutic targets available for screening. The number of compounds will reach into the million range in the near future and provide vast chemical diversity for drug discovery. However, this reservoir of chemical diversity creates downstream hurdles for any screening effort. Properly examining this number of compounds increases investments dramatically, both in the number of dollars spent and amount of limited reagents depleted. Traditional HTS techniques, such as the use of 96-well microtiter plates, have paved the way for faster processing speeds, but are being rapidly overwhelmed by screening demands. Miniaturization of such assays will allow for greater throughput, while concurrently reducing cost. To date, miniaturization efforts have been most successfully applied to bacterial and soluble protein based assays. Questions about the ability to deliver microquantities of mammalian cells without disruption of the cell membrane and/or activation of stress responses have been raised. An assay has been developed in which a human T-cell screen has been adapted to a 1536-well plate format. Through the use of a luciferase reporter gene system, it is shown that a mammalian cell-based assay may be successfully performed in 3 pil and potent inhibitors of the target of interest identified.

Journal of Biomolecular Screening, Vol. 4, No. 3, 137-142 (1999)
DOI: 10.1177/108705719900400307


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