Synthetic Phosphoethanolamine Cellobiose Promotes Escherichia coli Biofilm Formation and Congo Red Binding.

Synthetic Phosphoethanolamine Cellobiose Promotes Escherichia coli Biofilm Formation and Congo Red Binding.
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DOI:
10.1002/cbic.202000869
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发表时间:
2021-08-03
期刊:
Chembiochem : a European journal of chemical biology
影响因子:
--
通讯作者:
Townsend SD
Townsend SD
中科院分区:
其他
文献类型:
--
作者:
Nguyen JM;Moore RE;Spicer SK;Gaddy JA;Townsend SD

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尿路感染 (UTI) 是由生长在复杂的多细胞封闭聚集体(称为生物膜)中的细菌引起的。最近,大肠杆菌(E. coli)中产生的两性离子纤维素衍生物被确定在细菌生物膜的形成和组装中发挥重要作用。为了生产一种最小但结构明确的工具化合物来探测天然聚合物的生物学特性,我们合成了一种两性离子磷酸乙醇胺纤维二糖(pEtN 纤维二糖),并评估了其在革兰氏阴性细菌大肠杆菌(一种与尿路感染发病机制有关的病原体)中的生物膜活性。通过比色测定检查了合成 pEtN 纤维二糖对细菌生物膜形成的影响,结果显示与未处理的样品相比,细胞对非生物底物的粘附增加。此外,刚果红结合测定表明,在 pEtN 纤维二糖存在下培养大肠杆菌可增强刚果红与细菌细胞的结合。这些结果揭示了研究糖聚合物对革兰氏阴性病原体细胞粘附的影响的新机会。
Urinary tract infections (UTIs) are caused by bacteria growing in complex, multicellular enclosed aggregates known as biofilms. Recently, a zwitterionic cellulose derivative produced in Escherichia coli (E. coli) was determined to play an important role in the formation and assembly of bacterial biofilms. In order to produce a minimal, yet structurally defined tool compound to probe the biology of the naturally occurring polymer, we have synthesized a zwitterionic phosphoethanolamine cellobiose (pEtN cellobiose) and evaluated its biofilm activity in the gram-negative bacterium E. coli, a pathogen implicated in the pathogenesis of UTIs. The impact of synthetic pEtN cellobiose on bacterial biofilm formation was examined via colorimetric assays which revealed an increase in cellular adhesion to an abiotic substrate compared to untreated samples. Additionally, Congo red binding assays indicate that culturing E. coli in the presence of pEtN cellobiose enhances Congo red binding to bacterial cells. These results reveal new opportunities to study the impact glycopolymers have on cellular adhesion in gram-negative pathogens.
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