Discovery of Benzimidazole-Quinolone Hybrids as New Cleaving Agents toward Drug-Resistant <i>Pseudomonas aeruginosa</i>
DNA
作者:Ya-Nan Wang、Rammohan R. Yadav Bheemanaboina、Wei-Wei Gao、Jie Kang、Gui-Xin Cai、Cheng-He Zhou
DOI:10.1002/cmdc.201700739
日期:2018.5.23
new potential antimicrobial agents were designed and synthesized. Bioactive assays indicated that some of the prepared compounds exhibited potent antibacterial and antifungalactivities. Notably, 2‐fluorobenzyl derivative5 b (ethyl 7‐chloro‐6‐fluoro‐1‐[[1‐[(2‐fluorophenyl)methyl]benzimidazol‐2‐yl]methyl]‐4‐oxo‐quinoline‐3‐carboxylate) showed remarkable antimicrobial activity against resistant Pseudomonas
produce 13-(benzimidazolylmethyl)berberines (BMB) as potentially broad-spectrum antibacterial agents with the hope of confronting multidrug-resistantbacterialinfections in the livestock industry. Some of the newly prepared hybrids showed obvious antibacterial effects against tested strains. Particularly, 13-((1-octyl-benzimidazolyl)methyl)berberine 6f (OBMB-6f) was found to be the most promising compound
Novel purine benzimidazoles as antimicrobial agents by regulating ROS generation and targeting clinically resistant Staphylococcus aureus DNA groove
作者:Ya-Nan Wang、Rammohan R. Yadav Bheemanaboina、Gui-Xin Cai、Cheng-He Zhou
DOI:10.1016/j.bmcl.2018.03.046
日期:2018.5
A novel series of purine benzimidazole hybrids were designed and synthesized for the first time with the aim to circumvent the increasing antibiotic resistance. Hexyl appended hybrid 3c gave potent activities against most of the tested bacteria and fungi especially against multidrug-resistant strains Staphylococcus aureus ( MIC = 4 mu g/mL). Structure-activity relationships revealed that the benzimidazole fragment at the 9-position of purine played an important role in exerting potentially antibacterial activity. Both cell toxicity and ROS generation assays indicated that the purine derivative 3c showed low cytotoxicity and could be used as a safe agent. Molecular modeling suggested that hybrid 3c could bind with the residues of Topo IA through hydrogen bonds and electrostatic interactions. Quantum chemical studies were also performed on the target compound 3c to understand the structural features essential for activity. The active molecule 3c could effectively interact with S. aureus DNA to form 3c-DNA complex through groove binding mode, which might block DNA replication to display their powerful antimicrobial activity. (C) 2018 Elsevier Ltd. All rights reserved.