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Clinical and Diagnostic Laboratory Immunology, May 1998, p. 288-293, Vol. 5, No. 3
1071-412X/98/$04.00+0
Copyright © 1998, American Society for Microbiology. All rights reserved.

Specific Antibodies in Sera and Gastric Aspirates of Symptomatic and Asymptomatic Helicobacter pylori-Infected Subjects

A. Mattsson,1 A. Tinnert,1 A. Hamlet,1,2 H. Lönroth,2 I. Bölin,1 and A.-M. Svennerholm1,*

Departments of Medical Microbiology and Immunology1 and of Surgery,2 Göteborg University, Göteborg, Sweden

Received 2 October 1997/Returned for modification 25 November 1997/Accepted 3 February 1998

In this study we have determined systemic and local antibody responses against different Helicobacter pylori antigens in H. pylori-infected and noninfected subjects. In addition, we studied whether differences in antibody responses between patients with duodenal ulcers and asymptomatic H. pylori carriers might explain the different outcomes of infection. Sera and in most instances gastric aspirates were collected from 19 duodenal ulcer patients, 15 asymptomatic H. pylori carriers, and 20 noninfected subjects and assayed for specific antibodies against different H. pylori antigens, i.e., whole membrane proteins (MP), lipopolysaccharides, flagellin, urease, the neuraminyllactose binding hemagglutinin HpaA, and a 26-kDa protein, by enzyme-linked immunosorbent assay. The H. pylori-infected subjects had significantly higher antibody titers against MP, flagellin, and urease in both sera and gastric aspirates compared with the noninfected subjects. Furthermore, the antibody titers against HpaA were significantly elevated in sera but not in gastric aspirates from the infected subjects. However, no differences in antibody titers against any of the tested antigens could be detected between the duodenal ulcer patients and the asymptomatic H. pylori carriers, either in sera or in gastric aspirates.

* Corresponding author. Mailing address: Department of Medical Microbiology and Immunology, Guldhedsgatan 10A, S-413 46 Göteborg, Sweden. Phone: 46 31 60 47 24. Fax: 46 31 82 69 76. E-mail: ann-mari.svennerholm{at}microbio.gu.se.

Clinical and Diagnostic Laboratory Immunology, May 1998, p. 288-293, Vol. 5, No. 3
1071-412X/98/$04.00+0
Copyright © 1998, American Society for Microbiology. All rights reserved.


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