生物膜
微生物学
金黄色葡萄球菌
耐甲氧西林金黄色葡萄球菌
毒力
抗生素
毒素
毒力因子
生物
免疫印迹
抗药性
细菌
分泌物
体外
化学
基因
生物化学
遗传学
作者
Jingyi Liu,Jingjing Jia,Ming Liu,Hao Duan,Mingming Hu,Chang Liu,Ruo‐Yi Xue,Zi-Li Jin,Shanshan Zhang,Guocheng Li,Rang Feng,Zhe Jin,Haibo Li,Ling He
标识
DOI:10.1016/j.ijantimicag.2023.106972
摘要
Eradication of methicillin-resistant Staphylococcus aureus (MRSA) is challenging due to multi-drug resistance of strains and biofilm formation, the latter of which is an important barrier to the penetration of antibiotics and host defences. As such, there is an urgent need to discover and develop novel agents to fight MRSA-associated infection. In this study, HL-J6, a novel indolylbenzoquinone compound, was shown to inhibit S. aureus strains, with a minimum inhibitory concentration against MRSA252 of 2 µg/mL. Moreover, HL-J6 exhibited potent antibiofilm activity in vitro and was able to kill bacteria in biofilm. In the mouse models of wound infection, HL-J6 treatment reduced the MRSA load significantly and inhibited biofilm formation on the wounds. The potent targets of its antibiofilm activity were explored by real-time reverse transcriptase polymerase chain rection, which indicated that HL-J6 downregulated the transcription levels of sarA, atlAE and icaADBC. Moreover, Western blot results showed that HL-J6 reduced the secretion level of α-toxin, a major virulence factor. These findings indicate that HL-J6 is a promising lead compound for the development of novel drugs against MRSA biofilm infections.
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