Design, Synthesis, and Efficacy Testing of Nitroethylene- and 7-Nitrobenzoxadiazol-Based Flavodoxin Inhibitors against <i>Helicobacter pylori</i> Drug-Resistant Clinical Strains and in <i>Helicobacter pylori</i>-Infected Mice
作者:Sandra Salillas、Miriam Alías、Valérie Michel、Alejandro Mahía、Ainhoa Lucía、Liliana Rodrigues、Jessica Bueno、Juan José Galano-Frutos、Hilde De Reuse、Adrián Velázquez-Campoy、José Alberto Carrodeguas、Carlos Sostres、Javier Castillo、José Antonio Aínsa、María Dolores Díaz-de-Villegas、Ángel Lanas、Eliette Touati、Javier Sancho
DOI:10.1021/acs.jmedchem.9b00355
日期:2019.7.11
Helicobacter pylori (Hp) infection is the main cause of peptic ulcer and gastric cancer. Hp eradication rates have fallen due to increasing bacterial resistance to currently used broad-spectrum antimicrobials. We have designed, synthesized, and tested redox variants of nitroethylene- and 7-nitrobenzoxadiazole-based inhibitors of the essential Hp protein flavodoxin. Derivatives of the 7-nitrobenzoxadiazole lead, carrying reduced forms of the nitro group and/or oxidized forms of a sulfur atom, display high therapeutic indexes against several reference Hp strains. These inhibitors are effective against metronidazole-, clarithromycin-, and rifampicin-resistant Hp clinical isolates. Their toxicity for mice after oral administration is low, and, when administered individually at single daily doses for 8 days in a mice model of Hp infection, they decrease significantly Hp gastric colonization rates and are able to eradicate the infection in up to 60% of the mice. These flavodoxin inhibitors constitute a novel family of Hp-specific antimicrobials that may help fight the constant increase of Hp antimicrobial-resistant strains.