No influence of Lewis B expression in Helicobacter pylori on bacterial adhesion property / 中华消化杂志

ABSTRACT

Objective To investigate the possible influence of Lewis B expression in Helicobacter pylori (H.pylori) on bacterial adhesion property, and determine the relationship between babA 2 gene in H.pylori and peptic ulcer. Methods The bacterial adhesion property in a total of 78 H.pylori strains was performed using adherence assay in vitro, and the frequency of babA 2 gene was determined by polymerase chain reaction (PCR). Results Among 47 H.pylori strains isolated from peptic ulcer patients, 18 (38.3%) were positive for babA 2 gene, while babA 2 was positive in 14 (45.2%) of 31 strains isolated from non ulcer dyspepsia patients ( P =0.427). Among 31 H.pylori strains expressing Lewis B, 24 (77.4%) were positive for adherence assay, compared with 38 (80.9%) of 47 H.pylori strains without expression of Lewis B ( P =0.463). Conclusions (1) There is no association between babA 2 status in H.pylori strain and peptic ulcer in our population; (2) The expression of Lewis B in H.pylori does not interfere with bacterial adhesion property, and thus supports that the gastric epithelium is the receptor for Lewis B of H.pylori.