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益生菌对尿病原菌大肠杆菌的抗菌作用

Nikhitha Joshy¹, Biranthabail Dhanashree¹

¹Department of Microbiology, Kasturba Medical College Mangalore, Manipal Academy of Higher Education, Manipal, India, manipal.edu.

|January 12, 2026

概括

这项研究研究了prodigiosin.

科学领域:

微生物学微生物学
分子生物学分子生物学
生物化学生物化学

背景情况:

泌尿病原性大肠杆菌 (UPEC) 构成越来越大的威胁,原因是抗生素耐药性和生物膜形成的增加.
了解UPEC毒性背后的机制和开发新的治疗策略至关重要.

研究的目的:

为了确定UPEC分离物的抗生素敏感性概况.
评估来自Serratia marcescens的一种颜料 - - prodigiosin的抗菌活性和抗菌膜效应.
为了调查出奇素对UPEC毒性基因fimh的表达的影响.

主要方法:

生物化学识别和VITEK 2系统用于对175个UPEC分离物的抗生素分析.
微乳汁稀释方法来确定prodigiosin的最小抑制度 (MIC).
生物膜测定和聚合酶链反应 (PCR) 的微型板方法,以评估 fimH 基因表达.

主要成果:

普罗迪吉奥辛对UPEC菌株表现出抗菌活性,大多数分离物具有MIC在15至30mg/ml之间.
在UPEC中,prodigiosin显著改变了生物膜的形成,当prodigiosin存在时,强大的生物膜形成者显著增加.
治疗prodigiosin导致fimh病毒性基因的存在显著减少,这表明基因抑制或途径抑制.

结论:

普罗迪吉奥辛显示出作为抗UPEC药物的潜力,影响细菌生长和生物膜形成.
奇异的抗膜效应似乎与其对fimH病毒性基因表达的影响有关.
对益生菌素机制的进一步研究可能会导致对UPEC感染的新疗法.

关键词:

美国大肠杆菌 (E. coli).塞拉蒂亚 (Serratia marcescensens) 是一种的植物.生物膜是一种生物膜.这就是为什么FIMH FIMH 奇迹般的异能是什么意思

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