Phosphatidylethanolamine Deficiency Impairs Escherichia coli Adhesion by Downregulating Lipopolysaccharide Synthesis, Which is Reversible by High Galactose/Lactose Cultivation

Phosphatidylethanolamine Deficiency Impairs Escherichia coli Adhesion by Downregulating Lipopolysaccharide Synthesis, Which is Reversible by High Galactose/Lactose Cultivation
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磷脂酰乙醇胺缺乏会通过下调脂多糖合成来损害大肠杆菌粘附,而这种情况可通过高半乳糖/乳糖培养来逆转

DOI:
10.1080/15419061.2017.1282468
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发表时间:
2017
影响因子:
--
通讯作者:
Yong Chen
Yong Chen
中科院分区:
生物4区
文献类型:
--
作者:
Chuan Yu;Ming Li;Yanan Sun;Xingguo Wang;Yong Chen

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摘要作为细菌感染或生物污损的起始步骤,细菌在细胞或基质上的粘附通常是抗菌设计的最佳目标。磷脂酰乙醇胺(PE)是细菌中的主要磷脂,其在细菌粘附中的功能尚不清楚。在本研究中,四个E.包括两种PE缺陷突变体(PE−PC−和PE−PC+菌株)和两种含PE的野生型对照(PE + PC−菌株)的大肠杆菌菌株被招募来研究PE缺陷对细菌粘附的影响。我们发现,PE缺乏可损害E。大肠杆菌通过下调脂多糖(LPS)的生物合成而粘附在巨噬细胞(人THP-1衍生的巨噬细胞和小鼠RAW264.7巨噬细胞)或玻璃盖片上,这可以通过高半乳糖/乳糖而不是葡萄糖培养来逆转。这些数据表明,PE可能通过影响LPS的生物合成而在细菌粘附中发挥重要作用,并表明靶向PE生物合成也是一种潜在的抗菌策略。
Abstract As the initiation step of bacterial infection or biofouling, bacterial adhesion on cells or substrates is generally an optimal target for antibacterial design. Phosphatidylethanolamine (PE) is the principal phospholipid in bacteria, and its function in bacterial adhesion remains unclear. In this study, four E. coli strains including two PE-deficient mutants (PE−PC− and PE−PC+ strains) and two PE-containing wild-type controls (PE + PC− strains) were recruited to investigate the influence of PE deficiency on bacterial adhesion. We found that PE deficiency could impair E. coli adhesion on macrophages (human THP-1-derived and mouse RAW264.7 macrophages) or glass coverslips by downregulating lipopolysaccharide (LPS) biosynthesis, which could be reversible by high galactose/lactose but not glucose cultivation. The data imply that PE play important role in bacterial adhesion probably via affecting LPS biosynthesis and suggest that targeting PE biosynthesis is also a potential antibacterial strategy.
DOI: 10.1016/j.bbalip.2012.08.007
发表时间: 2013-03
期刊: Biochimica et biophysica acta
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DOI: --
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