摘要
群体感应抑制剂能够通过调控致病菌的群体感应系统来降低其致病力,且不易使其产生抗性突变,有望治疗或协同治疗细菌性感染,以应对细菌耐药性问题。本文研究了一株海洋来源的放线菌达松维尔拟诺卡氏菌JS106中的抗群体感应活性物质。采用减压柱层析和高效液相色谱从JS106的发酵液中分离到6个化合物:1,6-二羟基吩嗪(1)、6-羟基-1-甲氧基吩嗪(2)、4',7-二甲氧基异黄酮(3)、N-(2-羟基苯基)乙酰胺(4)、1-甲氧基吩嗪(5)和2-氨基吩恶嗪-3-酮(6)。在测试浓度下,所有化合物均表现出很好的抗群体感应活性,对紫色色杆菌的色素产生有显著的抑制作用,但没有明显的生长抑制。菌株JS106可产生丰富的吩嗪类化合物,在抗群体感应方面有出色的应用潜力。
Quorum sensing inhibitors(QSIs)can regulate the pathogenicity by mediating the bacterial quorum sensing system,and it is not easy to cause resistance mutations.To deal with the bacterial drug resistance,QSIs might be useful in treating or cooperated treating bacterial infections.In this study,the anti-quorum sensing substances from a marine derived actinobacterium Nocardiopsis dassonvillei JS106 was investigated.Six compounds,1,6-dihydroxyphenazine(1),6-hydroxy-1-methoxyphenazine(2),4',7-dimethoxyisoflavone(3),N-(2-hydroxyphenyl)acetamide(4),1-methoxyphenazine(5)and 2-aminophenoxazin-3-one(6),were isolated from the spent culture medium of JS106 using VLC and HPLC.All of the pure compounds showed significant anti-quorum sensing activity that inhibited the violacein production of Chromobacterium violaceum ATCC 12472 without visible growth inhibition at the test concentrations.N.dassonvillei JS106 can produce many phenazines and has higher potential in anti-quorum sensing application.
作者
缪莉
钱嘉兴
莫杰
周恒
钱生辉
董昆明
MIAO Li;QIAN Jiaxing;MO Jie;ZHOU Heng;QIAN Shenghui;DONG Kuming(School of Environmental Science and Engineering,Yangzhou University,Yangzhou 225127,China)
出处
《热带海洋学报》
CAS
CSCD
北大核心
2023年第1期145-151,共7页
Journal of Tropical Oceanography
基金
广东省海洋药物重点实验室开放课题基金及中国科学院热带海洋生物资源与生态重点实验室开放课题(2018011008)。
