Diarylacylhydrazones: Clostridium-selective antibacterials with activity against stationary-phase cells
作者:Chao Chen、Naveen K. Dolla、Gabriele Casadei、John B. Bremner、Kim Lewis、Michael J. Kelso
DOI:10.1016/j.bmcl.2013.12.015
日期:2014.1
Current antibiotics for treating Clostridium difficile infections (CDI), that is, metronidazole, vancomycin and more recently fidaxomicin, are mostly effective but treatment failure and disease relapse remain as significant clinical problems. The shortcomings of these agents are attributed to their low selectivity for C. difficile over normal gut microflora and their ineffectiveness against C. difficile spores. This Letter reports that certain diarylacylhydrazones identified during a high-throughput screening/counter-screening campaign show selective activity against two Clostridium species (C. difficile and Clostridium perfringens) over common gut commensals. Representative examples are shown to possess activity similar to vancomycin against clinical C. difficile strains and to kill stationary-phase C. difficile cells, which are responsible for spore production. Structure-activity relationships with additional synthesised analogues suggested a protonophoric mechanism may play a role in the observed activity/selectivity and this was supported by the well-known protonophore carbonyl cyanide m-chlorophenyl hydrazone (CCCP) showing selective anti-Clostridium effects and activity similar to diarylacylhydrazones against stationary-phase C. difficile cells. Two diarylacylhydrazones were shown to be non-toxic towards human FaDu and Hep G2 cells indicating that further studies with the class are warranted towards new drugs for CDI. (C) 2013 Elsevier Ltd. All rights reserved.
[EN] SALICYLIC ACID HYDRAZONES AS INHIBITORS OF THE ERK MAPKINASE PATHWAY AND FOR THE TREATMENT OF CANCER<br/>[FR] HYDRAZONES D'ACIDE SALICYLIQUE COMME INHIBITEURS DE VOIE D'ERK/ MAP KINASE ET POUR LE TRAITEMENT DU CANCER
申请人:UNIV HEALTH NETWORK
公开号:WO2006136008A1
公开(公告)日:2006-12-28
[EN] The present invention includes methods of using certain salicylic acid hydrazones as inhibitors of cancer cell proliferation and/or survival and/or clonogenic cancer cell proliferation and/or survival. In particular, the compounds of the invention are useful for treating ERK MAPkinase pathway-positive cell-proliferative disorders, such as cancer. [FR] Procédés d'utilisation d'hydrazones d'acide salicylique comme inhibiteurs de la prolifération et/ou de la survie des cellules cancéreuses et/ou de la prolifération et/ou de la survie des cellules cancéreuses clonogéniques. En particulier, les composés décrits sont utiles pour le traitement des troubles de prolifération cellulaire de type voie d'ERK/MAP kinase-positive, comme le cancer.