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Journal of Biomolecular Screening
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Article

High-Throughput Screening by Mass Spectrometry: Comparison with the Scintillation Proximity Assay with a Focused-File Screen of AKT1/PKB{alpha}

Andrea K. Quercia, William A. LaMarr, Jayhyuk Myung, Can C. Özbal, James A. Landro, Kevin J. Lumb*

* To whom correspondence should be addressed. E-mail: kevin_lumb{at}yahoo.com.


  Abstract
Mass spectrometry is an emerging format for label-free high-throughput screening. The main limitation of mass spectrometry is throughput, due to the requirement to purify samples prior to ionization. Here the authors compare an automated high-throughput mass spectrometry (HTMS) system (RapidFireTM) with the scintillation proximity assay (SPA). The cancer therapy target AKT1/PKB{alpha} was screened against a focused library of kinase inhibitors and IC50 values determined for all compounds that exhibit > 50% inhibition. A selection of additional compounds that exhibited ≤ 50% inhibition in the primary screen was chosen as controls to confirm inactives. The selection of compounds is expected to identify common actives, common inactives, false positives, and false negatives. Agreement is found between HTMS and SPA in terms of primary hit identification and hit confirmation. (Journal of Biomolecular Screening XXXX:xx-xx)

First published on May 3, 2007, doi:10.1177/1087057107300647

Journal of Biomolecular Screening 2007;12:473.

A more recent version of this article appeared on June 1, 2007

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