Small Molecule Attenuates Bacterial Virulence by Targeting Conserved Response Regulator.

Small Molecule Attenuates Bacterial Virulence by Targeting Conserved Response Regulator.
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DOI:
10.1128/mbio.00137-23
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发表时间:
2023-06-27
期刊:
影响因子:
6.4
通讯作者:
--
中科院分区:
生物学1区
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生物膜群落中的抗生素耐受性是一个严重的公共卫生挑战。在这里,我们报告了一种2-氨基咪唑衍生物的鉴定,它可以抑制两种致病性革兰氏阳性细菌,变形链球菌和金黄色葡萄球菌的生物被膜形成。在变形链球菌中,该化合物在N端受体区域与关键反应调节因子VICR结合,同时抑制VICR和VICR调节基因的表达,包括编码关键生物膜基质产生酶GTFS的基因。该化合物通过与葡萄球菌VICR同系物结合来抑制金黄色葡萄球菌生物膜的形成。此外,该抑制剂有效地减弱了变形链球菌在龋齿大鼠模型中的毒力。由于该化合物通过保守的转录因子靶向细菌生物膜和毒力,它代表了一种很有前途的新型抗感染药物,可以探索用来预防或治疗一系列细菌感染。
Antibiotic tolerance within a biofilm community presents a serious public health challenge. Here, we report the identification of a 2-aminoimidazole derivative that inhibits biofilm formation by two pathogenic Gram-positive bacteria, Streptococcus mutans and Staphylococcus aureus. In S. mutans, the compound binds to VicR, a key response regulator, at the N-terminal receiver domain, and concurrently inhibits expression of vicR and VicR-regulated genes, including the genes that encode the key biofilm matrix producing enzymes, Gtfs. The compound inhibits S. aureus biofilm formation via binding to a Staphylococcal VicR homolog. In addition, the inhibitor effectively attenuates S. mutans virulence in a rat model of dental caries. As the compound targets bacterial biofilms and virulence through a conserved transcriptional factor, it represents a promising new class of anti-infective agents that can be explored to prevent or treat a host of bacterial infections.
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