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doi:10.1016/j.bmcl.2004.12.085 
Copyright © 2005 Elsevier Ltd All rights reserved.
Discovery of an exceptionally potent and selective class of fatty acid amide hydrolase inhibitors enlisting proteome-wide selectivity screening: concurrent optimization of enzyme inhibitor potency and selectivity
Donmienne Leung, Wu Du, Christophe Hardouin, Heng Cheng, Inkyu Hwang, Benjamin F. Cravatt and Dale L. Boger
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Received 9 December 2004;
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Abstract
The concurrent implementation of a proteome-wide serine hydrolase selectivity screen with traditional efforts to optimize fatty acid amide hydrolase (FAAH) inhibition potency led to the expedited discovery of a new class of exceptionally potent (Ki < 300 pM) and unusually selective (>100-fold selective) inhibitors. The iterative inhibitor design and evaluation with assistance of the selectivity screen served to differentiate otherwise indistinguishable inhibitors permitting the simultaneous optimization of potency and selectivity. Significantly, the simultaneous assessment of all potential competitive enzymes with the selectivity screen does not require the use of expressed or purified enzymes or a competitive substrate, no modification of the inhibitors is required, and the relative potency for competitive enzymes can be quantified (IC50’s) including those that lack known substrates or function.
