title: Differences in surface-exposed antigen expression between Helicobacter pylori strains isolated from duodenal ulcer patients and from asymptomatic subjects.
abstract: We have analyzed possible qualitative and quantitative differences in antigen expression between Helicobacter pylori strains isolated from the antrum and different locations in the duodenum of 21 duodenal ulcer (DU) patients and 20 asymptomatic subjects (AS) by enzyme-linked immunosorbent assay (ELISA) and inhibition ELISA. Almost all antral and duodenal strains grown in vitro expressed the N-acetyl-neuroaminyllactose-binding hemagglutinin, flagellins (subunits FlaA and FlaB), urease, a 26-kDa protein, and a neutrophil-activating protein. In 75% of both the DU patients and the AS, antral H. pylori strains expressed either the blood group antigen Lewis y (Le(y)) alone or together with the Le(x) antigen. However, duodenal H. pylori strains of DU patients expressed Le(y) antigen more frequently than corresponding strains of AS (P < 0.05). Presence of Le(y) on H. pylori was related to the degree of active duodenitis (P < 0.05). Duodenal H. pylori strains isolated from AS were significantly more often Lewis nontypeable than duodenal strains of DU patients (P < 0.01). Presence of H. pylori blood group antigen-binding adhesin (BabA) was significantly higher on both antral and duodenal strains isolated from DU patients than on corresponding strains isolated from AS (P < 0.05). BabA-positive duodenal H. pylori strains isolated from DU patients were associated with active duodenitis more frequently than corresponding strains isolated from AS (P < 0.01). Infection with H. pylori strains positive for Le(y) and BabA in the duodenum is associated with development of duodenal ulcer formation.
authors.affiliation: Departments of Medical Microbiology and Immunology, Göteborg University, S-413 46 Göteborg, Sweden.
authors.forename: A C
authors.initials: AC
authors.lastname: Thoreson
authors.forename: A
authors.initials: A
authors.lastname: Hamlet
authors.forename: J
authors.initials: J
authors.lastname: Celik
authors.forename: M
authors.initials: M
authors.lastname: Byström
authors.forename: S
authors.initials: S
authors.lastname: Nyström
authors.forename: L
authors.initials: L
authors.lastname: Olbe
authors.forename: A M
authors.initials: AM
authors.lastname: Svennerholm
mesh_terms: D000017:ABO Blood-Group System; D018829:Adhesins, Bacterial; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000942:Antigens, Bacterial / Q000032:analysis*; D000954:Antigens, Surface / Q000032:analysis; D002352:Carrier Proteins / Q000032:analysis; D004381:Duodenal Ulcer / Q000382:microbiology* / Q000503:physiopathology; D004382:Duodenitis / Q000382:microbiology / Q000503:physiopathology; D004386:Duodenum / Q000382:microbiology; D004797:Enzyme-Linked Immunosorbent Assay; D016481:Helicobacter Infections / Q000382:microbiology* / Q000503:physiopathology; D016480:Helicobacter pylori / Q000276:immunology / Q000302:isolation & purification*; D006801:Humans; D007983:Lewis Blood Group Antigens / Q000032:analysis; D008297:Male; D008875:Middle Aged; D011706:Pyloric Antrum / Q000382:microbiology*
chemical_list: D000017:ABO Blood-Group System; D018829:Adhesins, Bacterial; D000942:Antigens, Bacterial; D000954:Antigens, Surface; C400429:BabA protein, Helicobacter pylori; D002352:Carrier Proteins; D007983:Lewis Blood Group Antigens