Quorum sensing inhibitors of Staphylococcus aureus from Italian medicinal plants.

Quorum sensing inhibitors of Staphylococcus aureus from Italian medicinal plants.
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DOI:
10.1055/s-0030-1250145
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发表时间:
2011-01
期刊:
影响因子:
2.7
通讯作者:
Bennett BC
Bennett BC
中科院分区:
医学3区
文献类型:
--
作者:
Quave CL;Plano LR;Bennett BC

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由于耐甲氧西林金黄色葡萄球菌(MRSA)感染导致的发病率和死亡率估计继续上升。治疗选择受到抗生素耐药性的限制。抑制群体感应(QS)途径的抗病原体化合物可能是抗生素的有用替代品。葡萄球菌QS由agr基因座编码,负责产生δ-溶血素。在培养上清液中发现的δ-溶血素的定量允许在翻译而不是转录水平上分析agr活性。我们采用RP-HPLC技术,通过定量δ-溶血素来研究来自104种意大利植物的168种提取物的抗QS活性。从三种药用植物(黑穗醋栗,板栗,和接骨木)的提取物在δ-溶血素的产生中表现出剂量依赖性反应,表明在致病性MRSA分离株中具有强的抗QS活性。
Morbidity and mortality estimates due to methicillin-resistant Staphylococcus aureus (MRSA) infections continue to rise. Therapeutic options are limited by antibiotic resistance. Anti-pathogenic compounds, which inhibit quorum sensing (QS) pathways, may be a useful alternative to antibiotics. Staphylococcal QS is encoded by the agr locus and is responsible for the production of δ-hemolysin. Quantification of δ-hemolysin found in culture supernatants permits the analysis of agr activity at the translational, rather than transcriptional, level. We employed RP-HPLC techniques to investigate the anti-QS activity of 168 extracts from 104 Italian plants through quantification of δ-hemolysin. Extracts from three medicinal plants (Ballota nigra, Castanea sativa, and Sambucus ebulus) exhibited a dose-dependent response in the production of δ-hemolysin, indicating strong anti-QS activity in a pathogenic MRSA isolate.
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