Lead Optimization Studies on FimH Antagonists: Discovery of Potent and Orally Bioavailable Ortho-Substituted Biphenyl Mannosides

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• 作者：Zhenfu Han ; Jerome S. Pinkner ; Bradley Ford ; Erik Chorell ; Jan M. Crowley ; Corinne K. Cusumano ; Scott Campbell ; Jeffrey P. Henderson ; Scott J. Hultgren ; James W. Janetka
• 刊名：Journal of Medicinal Chemistry
• 出版年：2012
• 出版时间：April 26, 2012
• 年：2012
• 卷：55
• 期：8
• 页码：3945-3959
• 全文大小：666K
• 年卷期：v.55,no.8(April 26, 2012)
• ISSN：1520-4804

文摘

Herein, we describe the X-ray structure-based design and optimization of biaryl mannoside FimH inhibitors. Diverse modifications to the biaryl ring to improve druglike physical and pharmacokinetic properties of mannosides were assessed for FimH binding affinity based on their effects on hemagglutination and biofilm formation along with direct FimH binding assays. Substitution on the mannoside phenyl ring ortho to the glycosidic bond results in large potency enhancements several-fold higher than those of corresponding unsubstituted matched pairs and can be rationalized from increased hydrophobic interactions with the FimH hydrophobic ridge (Ile13) or 鈥渢yrosine gate鈥?(Tyr137 and Tyr48) also lined by Ile52. The lead mannosides have increased metabolic stability and oral bioavailability as determined from in vitro PAMPA predictive model of cellular permeability and in vivo pharmacokinetic studies in mice, thereby representing advanced preclinical candidates with promising potential as novel therapeutics for the clinical treatment and prevention of recurring urinary tract infections.