鲍曼不动杆菌
肉汤微量稀释
粘菌素
广告
突变体
生物信息学
抗生素
微生物学
生物
抗菌活性
化学
细菌
计算生物学
药品
药物发现
药理学
生物信息学
生物化学
最小抑制浓度
遗传学
铜绿假单胞菌
基因
作者
Younes Smani,Yassir Boulaamane,Irene Molina Panadero,Abdelkrim Hmadcha,Celia Atalaya Rey,Soukayna Baammi,Achraf El Allali,Amal Maurady
出处
期刊:Research Square - Research Square
日期:2023-11-29
标识
DOI:10.21203/rs.3.rs-3664762/v1
摘要
Abstract The global challenges presented by multidrug-resistant Acinetobacter baumannii infections have stimulated the development of new treatment strategies. We reported that OmpW is a potential therapeutic target in Acinetobacter baumannii. Here, a library of 11,648 natural compounds was subjected to a primary screening using QSAR models generated from a ChEMBL dataset with >7,000 compounds with their reported MIC values against A. baumannii followed by a structure-based virtual screening against OmpW. In silico ADME evaluation was conducted to assess the drug-likeness of these compounds. The ten highest-ranking compounds were found to bind with an energy score ranging from -7.8 to -7.0 kcal/mol where most of them belonged to curcuminoids. To validate these findings, one lead compound exhibiting promising binding stability as well as favourable pharmacokinetics properties, namely demethoxycurcumin was tested against a panel of A. baumannii strains to determine its antibacterial activity using microdilution and time-kill curve assays. To validate whether the compound binds to the selected target, an OmpW-deficient mutant was also studied and compared to the wild-type. Our results demonstrate that demethoxycurcumin in monotherapy and in combination with colistin is active against all A. baumannii strains. Moreover, an increased bacterial growth was observed in the OmpW-deficient mutant suggesting the importance of OmpW for the compound to exhibit its antibacterial activity. Finally, the compound was found to significantly reduce the interaction of A. baumannii with host cells suggesting its anti-virulence properties. Collectively, this study demonstrates artificial intelligence as a promising strategy for the discovery of curcuminoids as antimicrobial agents for combating A. baumannii infections.
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