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Publication Abstract from PubMed

The F9/Yde/Fml pilus, tipped with the FmlH adhesin, has been shown to provide uropathogenic Escherichia coli (UPEC) a fitness advantage in urinary tract infections (UTIs). Here, we used X-ray structure guided design to optimize our previously described ortho-biphenyl Gal and GalNAc FmlH antagonists such as compound 1 by replacing the carboxylate with a sulfonamide as in 50. Other groups which can accept H-bonds were also tolerated. We pursued further modifications to the biphenyl aglycone resulting in significantly improved activity. Two of the most potent compounds, 86 (IC(50) = 0.051 muM) and 90 (IC(50) = 0.034 muM), exhibited excellent metabolic stability in mouse plasma and liver microsomes but showed only limited oral bioavailability (<1%) in rats. Compound 84 also showed a good pharmacokinetic (PK) profile in mice after IP dosing with compound exposure above the IC(50) for 6 h. These new FmlH antagonists represent new antivirulence drugs for UTIs.

Biphenyl Gal and GalNAc FmlH Lectin Antagonists of Uropathogenic E. coli (UPEC): Optimization through Iterative Rational Drug Design.,Maddirala AR, Klein R, Pinkner JS, Kalas V, Hultgren SJ, Janetka JW J Med Chem. 2019 Jan 24;62(2):467-479. doi: 10.1021/acs.jmedchem.8b01561. Epub , 2019 Jan 2. PMID:30540910^[1]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.