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Journal of Biomolecular Screening
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Automated Assay Optimization with Integrated Statistics and Smart Robotics

Paul B. Taylor

Department of Screening Sciences, SmithKline Beecham Pharmaceuticals, King of Prussia, PA

Frances P. Stewart

Department of Cheminformatics, SmithKline Beecham Pharmaceuticals, King of Prussia, PA

Damien J. Dunnington

Department of Screening Sciences, SmithKline Beecham Pharmaceuticals, King of Prussia, PA, Aventis Pharmaceuticals, Bridgewater, NJ

Sean T. Quinn

Department of Screening Sciences, SmithKline Beecham Pharmaceuticals, King of Prussia, PA

Christina K. Schulz

Department of Screening Sciences, SmithKline Beecham Pharmaceuticals, King of Prussia, PA

Kalindi S. Vaidya

Department of Screening Sciences, SmithKline Beecham Pharmaceuticals, King of Prussia, PA

Edit Kurali

Department of Cheminformatics, SmithKline Beecham Pharmaceuticals, King of Prussia, PA

Tonia R. Lane

Department of Mechanistic Enzymology, SmithKline Beecham Pharmaceuticals, King of Prussia, PA

Wenfang C. Xiong

Department of Mechanistic Enzymology, SmithKline Beecham Pharmaceuticals, King of Prussia, PA

Timothy P. Sherrill

Beckman Coulter, Inc., Bioresearch Division, Indianapolis, IN

John S. Snider

Beckman Coulter, Inc., Bioresearch Division, Indianapolis, IN

Nathan D. Terpstra

Beckman Coulter, Inc., Bioresearch Division, Indianapolis, IN

Robert P. Hertzberg

Department of Screening Sciences, SmithKline Beecham Pharmaceuticals, King of Prussia, PA

The transition from manual to robotic high throughput screening (HTS) in the last few years has made it feasible to screen hundreds of thousands of chemical entities against a biological target in less than a month. This rate of HTS has increased the visibility of bottlenecks, one of which is assay optimization. In many organizations, experimental methods are generated by therapeutic teams associated with specific targets and passed on to the HTS group. The resulting assays frequently need to be further optimized to withstand the rigors and time frames inherent in robotic handling. Issues such as protein aggregation, ligand instability, and cellular viability are common variables in the optimization process. The availability of robotics capable of performing rapid random access tasks has made it possible to design optimization experiments that would be either very difficult or impossible for a person to carry out. Our approach to reducing the assay optimization bottleneck has been to unify the highly specific fields of statistics, biochemistry, and robotics. The product of these endeavors is a process we have named automated assay optimization (AAO). This has enabled us to determine final optimized assay conditions, which are often a composite of variables that we would not have arrived at by examining each variable independently. We have applied this approach to both radioligand binding and enzymatic assays and have realized benefits in both time and performance that we would not have predicted a priori. The fully developed AAO process encompasses the ability to download information to a robot and have liquid handling methods automatically created. This evolution in smart robotics has proven to be an invaluable tool for maintaining high-quality data in the context of increasing HTS demands.

Journal of Biomolecular Screening, Vol. 5, No. 4, 213-225 (2000)
DOI: 10.1177/108705710000500404
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