Serologic response to lower-molecular-weight proteins of H. pylori is related to clinical outcome of H. pylori infection in Taiwan

Shu Chu Shiesh, Bor Shyang Sheu, Hsiao Bai Yang, Hui Jane Tsao, Xi Zhang Lin

Research output: Contribution to journalArticlepeer-review

28 Citations (Scopus)

Abstract

The study aimed to examine the serum serological response among H. pylori-infected patients with various upper gastrointestinal diagnoses; to ascertain whether it could be predictive to the diagnostic outcome of dyspepsia. One hundred seventy H. pylori-infected patients with dyspeptic symptoms but without previous treatment were enrolled, including those with duodenal ulcer disease (N = 47), gastric ulcer (N = 23), nonulcer dyspepsia (N = 60), gastric cancer (N = 34), and MALToma (N = 6). Sera from dyspeptic patients without H. pylori infection (N = 33) were used as controls. During endoscopy, gastric biopsies were taken for CLO-test, histology, and culture for the detection of H. pylori infection, defined by a positive culture or positive results of both CLO-test and histology. Total H. pylori IgG antibody was tested by an ELISA method. Antibody responses to specific H. pylori proteins were tested by a western blotting system. Of patients with H. pylori-infected gastroduodenal diseases, 76.5%, 42.9%, 23.6%, 46.7%, 84.1%, 76.5%, 82.9%, and 32.4% on average, showed responses to the 116-kDa (CagA), 89-kDa (VacA), 60-kDa, 45-kDa, 35-kDa, 30-kDa, 26.5-kDa, and 19.5-kDa H. pylori-specific proteins, respectively. A significant association was found between the serological response to 19.5-kDa and 26.5-kDa proteins and malignant outcome. Of H. pylori infection (P < 0.02). Among patients without malignancy, the absence of a band at 19.5 kDa was statistically associated with the presence of an ulcer (P < 0.05). The presence of serum antibody against CagA is not different between patients with ulcer and with malignancy in clinical diagnosis. The serum test for detecting antibodies against lower- molecular-weight proteins of H. pylori, such as those of 19.5 and 26.5 kDa, could be useful to identify H. pylori-infected patients at risk of peptic ulcer or malignancy.

Original languageEnglish
Pages (from-to)781-788
Number of pages8
JournalDigestive Diseases and Sciences
Volume45
Issue number4
DOIs
Publication statusPublished - 2000

All Science Journal Classification (ASJC) codes

  • Physiology
  • Gastroenterology

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