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Infection and Immunity, August 2001, p. 4774-4781, Vol. 69, No. 8
Department of Medicine, Clinical Science
Institute, University College Hospital Galway,1
and Laboratory of Molecular Biochemistry, Department of
Microbiology,2 National University of Ireland,
Galway, Ireland, and Department of Microbiology, Kaunas
Medical Academy, Kaunas, Lithuania3
Received 27 June 2000/Returned for modification 7 September
2000/Accepted 7 May 2001
Lewis (Le) antigens have been implicated in the pathogenesis of
atrophic gastritis and gastric cancer in the setting of
Helicobacter pylori infection, and H. pylori-induced anti-Le antibodies have been described that
cross-react with the gastric mucosa of both mice and humans. The
aim of this study was to examine the presence of anti-Le antibodies in
patients with H. pylori infection and gastric cancer and to
examine the relationships between anti-Le antibody production,
bacterial Le expression, gastric histopathology, and host Le
erythrocyte phenotype. Anti-Le antibody production and H. pylori Le expression were determined by enzyme-linked
immunosorbent assay, erythrocyte Le phenotype was examined by
agglutination assays, and histology was scored blindly. Significant
levels of anti-Lex antibody (P < 0.0001, T = 76.4, DF = 5) and anti-Ley antibody
(P < 0.0001, T = 73.05, DF = 5) were found
in the sera of patients with gastric cancer and other H. pylori-associated pathology compared with H. pylori-negative controls. Following incubation of patient sera
with synthetic Le glycoconjugates, anti-Lex and
-Ley autoantibody binding was abolished. The
degree of the anti-Lex and -Ley
antibody response was unrelated to the host Le phenotype but was
significantly associated with the bacterial expression of Lex (r = 0.863, r2 = 0.745, P < 0.0001) and Ley (r = 0.796, r2 = 0.634, P < 0.0001), respectively. Collectively, these data suggest that anti-Le
antibodies are present in most patients with H. pylori
infection, including those with gastric cancer, that variability exists
in the strength of the anti-Le response, and that this response is
independent of the host Le phenotype but related to the bacterial Le phenotype.
0019-9567/01/$04.00+0 DOI: 10.1128/IAI.69.8.4774-4781.2001
Copyright © 2001, American Society for Microbiology. All rights reserved.
Relationship of Anti-Lewis x and Anti-Lewis y Antibodies in Serum
Samples from Gastric Cancer and Chronic Gastritis Patients to
Helicobacter pylori-Mediated Autoimmunity

*
Corresponding author. Mailing address: Laboratory of
Molecular Biochemistry, Department of Microbiology, National
University of Ireland, Galway, University Road, Galway,
Ireland. Phone: 353-91-524411, x3163. Fax: 353-91-525700. E-mail:
anthony.moran{at}nuigalway.ie.
Present address: Division of Gastroenterology, Duke University
Medical Center, Durham, NC 27710.
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