FimH is a type I fimbrial lectin located at the tip of type-1 pili of Gram-negative uropathogenic Escherichia coli (UPEC) guiding its ability to adhere and infect urothelial cells. Accordingly, blocking FimH with small molecule inhibitor is considered as a promising new therapeutic alternative to treat urinary tract infections caused by UPEC. Herein, we report that compounds having the S-glycosidic bond (thiomannosides) had improved metabolic stability and plasma exposures when dosed orally. Especially compound 5h showed the potential to inhibit biofilm formation and also to disrupt the preformed biofilm. And compound 5h showed prophylactic effect in UTI model in mice.

FimH是一种I型纤维凝集素，位于革兰氏阴性尿路致病性大肠杆菌（UPEC）的1型菌毛末端，指导其粘附和感染尿道上皮细胞的能力。因此，用小分子抑制剂阻断FimH被认为是治疗由UPEC引起的尿路感染的有前途的新治疗选择。本文中，我们报道口服给药时具有S-糖苷键的化合物（硫甘露糖苷）具有改善的代谢稳定性和血浆暴露。特别是化合物5h显示出抑制生物膜形成并破坏预形成的生物膜的潜力。化合物5h在小鼠UTI模型中具有预防作用。