PDE4 inhibitors are of high interest for treatment of a wide range of inflammatory or autoimmune diseases. Their potential however has not yet been realized due to target-associated side effects, resulting in a low therapeutic window. We herein report the design, synthesis and evaluation of novel PDE4 inhibitors containing a gamma-lactone structure. Such molecules are designed to undergo metabolic inactivation when entering circulation, thereby limiting systemic exposure and reducing the risk for side effects. The resulting inhibitors were highly active on both PDE4B1 and PDE4D2 and underwent rapid degradation in human plasma by paraoxonase 1. In contrast, their metabolites displayed markedly reduced permeability and/or on-target activity. (C) 2014 Elsevier Ltd. All rights reserved.
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McMaster Univ, Dept Med, HSC 3U26,1200 Main St West, Hamilton, ON L8N 3Z5, CanadaMcMaster Univ, Dept Med, HSC 3U26,1200 Main St West, Hamilton, ON L8N 3Z5, Canada
Al-Sajee, Dhuha
Yin, Xuanzhi
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McMaster Univ, Dept Med, HSC 3U26,1200 Main St West, Hamilton, ON L8N 3Z5, CanadaMcMaster Univ, Dept Med, HSC 3U26,1200 Main St West, Hamilton, ON L8N 3Z5, Canada
Yin, Xuanzhi
Gauvreau, Gail M.
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McMaster Univ, Dept Med, HSC 3U26,1200 Main St West, Hamilton, ON L8N 3Z5, CanadaMcMaster Univ, Dept Med, HSC 3U26,1200 Main St West, Hamilton, ON L8N 3Z5, Canada