Quantitative detection of secretory immunoglobulin A to Helicobacter pylori in gastric juice: Antibody capture enzyme-linked immunosorbent assay

Shunji Hayashi, Toshiro Sugiyama, Kazunari Hisano, Teruhito Awakawa, Ichiro Kurokawa, Akira Yachi, Hiroshi Isogai, Emiko Isogai, Kenji Yokota, Yoshikazu Hirai, Keiji Oguma, Nobuhiro Fuji

    Research output: Contribution to journalArticlepeer-review

    8 Citations (Scopus)

    Abstract

    Helicobacter pylori is a major etiologic agent in gastroduodenal disorders. In this study, immunoglobulin A (IgA) antibodies to H. pylori were estimated in serum and gastric juice specimens from patients with gastritis and peptic ulcers using antibody capture enzyme-linked immunosorbent assays (ACELISAs). The antibody titers of the ACELISAs are independent of the antibody concentration and reflect the ratio of H. pylori-specific IgA to total IgA. The ratio is stable, although the antibody concentration fluctuates in gastric juice. Using the ACELISAs it was possible to evaluate quantitatively not only serum IgA (SR-IgA) antibodies but also secretory IgA (SC-IgA) antibodies in gastric juice. There were significant differences between the patients and control group in the SR-IgA and SC-IgA ACELISAs. Furthermore, the ACELISAs made it possible to compare between SR-IgA antibodies in serum and SC-IgA antibodies in gastric juice. In all patients, the ratios of H. pylori-specific IgA were higher in gastric juice than in serum. These results suggest that H. pylori SC-IgA antibodies are mainly produced by the local immune response in the gastric mucosa. Our studies indicate that ACELISA is well suited for the analysis of local immune response in mucosa.

    Original languageEnglish
    Pages (from-to)74-77
    Number of pages4
    JournalJournal of Clinical Laboratory Analysis
    Volume10
    Issue number2
    DOIs
    Publication statusPublished - 1996

    Keywords

    • ELISA
    • H. pylori
    • gastric juice
    • mucosal immunity
    • secretory IgA

    ASJC Scopus subject areas

    • Immunology and Allergy
    • Hematology
    • Public Health, Environmental and Occupational Health
    • Clinical Biochemistry
    • Medical Laboratory Technology
    • Biochemistry, medical
    • Microbiology (medical)

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