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一株人源粪便大肠杆菌菌株对小鼠结肠黏液的黏附作用。

Adhesion of a human fecal Escherichia coli strain to mouse colonic mucus.

作者信息

Cohen P S, Arruda J C, Williams T J, Laux D C

出版信息

Infect Immun. 1985 Apr;48(1):139-45. doi: 10.1128/iai.48.1.139-145.1985.

Abstract

Escherichia coli F-18 isolated from the feces of a healthy human is an excellent colonizer of the CD-1 mouse colon. In the present investigation, adhesion of E. coli F-18 to CD-1 mouse colonic mucus and bovine serum albumin (BSA), immobilized on polystyrene, was studied. Adhesion of E. coli F-18 to mucus was two- to sixfold greater than to either BSA or polystyrene. E. coli F-18 lipopolysaccharide specifically blocked adhesion of E. coli F-18 to mucus and mimicked adhesion of E. coli F-18 to mucus, BSA, and polystyrene. Purified capsule also blocked adhesion of E. coli F-18 to mucus, but this inhibition was found to be entirely nonspecific. The specific E. coli F-18 receptor in mucus appeared to be a glycoprotein, containing sugars normally found in mucins and having a maximum molecular weight of between 1.25 X 10(5) and 2.5 X 10(5).

摘要

从健康人体粪便中分离出的大肠杆菌F-18是CD-1小鼠结肠的优良定植菌。在本研究中,研究了大肠杆菌F-18对固定在聚苯乙烯上的CD-1小鼠结肠黏液和牛血清白蛋白(BSA)的黏附情况。大肠杆菌F-18对黏液的黏附比对BSA或聚苯乙烯的黏附大两到六倍。大肠杆菌F-18脂多糖特异性地阻断了大肠杆菌F-18对黏液的黏附,并模拟了大肠杆菌F-18对黏液、BSA和聚苯乙烯的黏附。纯化的荚膜也阻断了大肠杆菌F-18对黏液的黏附,但发现这种抑制完全是非特异性的。黏液中大肠杆菌F-18的特异性受体似乎是一种糖蛋白,含有通常在黏蛋白中发现的糖类,最大分子量在1.25×10⁵至2.5×10⁵之间。

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