High-throughput Miniaturization of Cytochrome P450 Time-dependent Inhibition Screening Using the Echo® 525 Liquid Handler

21 Feb 2013

Early assessment of the ADMET (Absorption, Distribution, Metabolism, Excretion and Toxicity) properties of drug candidates has become a critical part of modern drug discovery. Results from time-dependent CYP inhibition experiments can predict clinically relevant drug-drug interaction potential. Conventionally the assay is run with large reaction volumes to reduce DMSO concentration. In this application note it is demonstrated that miniaturized and simplified time-dependent CYP inhibition assays can be efficiently conducted with the Echo 525 liquid handler.

Echo® 525 Liquid Handler

Beckman Coulter Life Sciences

The Echo 525 platform, like the other Echo liquid handler models, is designed to use sound energy to transfer reagents. Unlike the other Echo models, the Echo 525 platform transfers at a larger volume increment (25 nL). This enables the more rapid transfer of aqueous reagents required in biochemical and genomics assays setup.

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Echo® 555 Liquid Handler

Beckman Coulter Life Sciences

Echo® 555 liquid handler - the world's fastest acoustic dispensing platform for life science applications. The Echo® 555 liquid handler is the world’s fastest acoustic liquid handling platform for life science applications. Laboratories that demand very high throughput rely upon the Echo 555 liquid handler for round-the-clock trouble-free operation to enable the fastest discovery.The Echo 555 doubles the throughput of the Echo 550 and provides transfers from as many as 660,000 wells per day. Like the Echo 520 and Echo 550 liquid handlers, the Echo 555 uses "touchless" ADE transfer technology. ADE uses sound energy to transfer 2.5 nL droplets from Echo-qualified 384- and 1536-well source plates into 96-, 384-, 1536- and 3456-well destination plates.This unique touchless technology eliminates consumable tip costs, washing, and cross-contamination. Unsurpassed volumetric precision (≤ 8% CV) and accuracy (≤ 10% CV) ensure superior results. Independent studies have shown that Echo liquid handlers eliminate false negatives due to sample loss on tip surfaces in low-concentration transfers. Like the Echo 550 liquid handler, the Echo 555 liquid handler reports both fluid volume and DMSO hydration.Echo® 555 Liquid Handler Features: Tipless transfer, resulting in dramatic cost savings Accurate, precise movement of nanoliter-scale quantities, enabling assay miniaturization and further reducing costs Elimination of cross-contamination, carryover or leachates Better results through direct dilution of compounds, an improvement over serial dilution methods Improved information about sample integrity and improved transfer quality through measurement of DMSO hydration level Applications: Compound management Compound screening siRNA screening Biochemical assays Cell-based assays PCR Genotyping Gene expression

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High-throughput Miniaturization of Cytochrome P450 Time-dependent Inhibition Screening Using the Echo® 525 Liquid Handler