IgG subclass response to Helicobacter pylori and CagA antigens in children
نویسندگان
چکیده
منابع مشابه
Regulation of Helicobacter pylori cagA expression in response to salt.
Helicobacter pylori infection and a high dietary salt intake are risk factors for the development of gastric adenocarcinoma. In this study, we tested the hypothesis that high salt concentrations might alter gene expression in H. pylori. Transcriptional profiling experiments indicated that the expression of multiple H. pylori genes, including cagA, was regulated in response to the concentrations...
متن کاملHelicobacter pylori vacA genotype is a predominant determinant of immune response to Helicobacter pylori CagA
AIM To evaluate the frequency of Helicobacter pylori (H. pylori) CagA antibodies in H. pylori infected subjects and to identify potential histopathological and bacterial factors related to H. pylori CagA-immune response. METHODS Systematic data to H. pylori isolates, blood samples, gastric biopsies for histological and molecular analyses were available from 99 prospectively recruited subjects...
متن کاملSerological differentiation of Helicobacter pylori CagA(+) and CagA(-) infections.
Many Helicobacterpylori strains causing gastroduodenal diseases have a cagA gene encoding CagA protein, a virulence factor of these bacteria. Anti-CagA antibodies produced by the majority of people infected with CagA(+) strains can indicate such an infection. In this study, the efficacy of three immunoenzymatic tests for detecting CagA(+) and CagA(-) infections were compared: immunoblot (Mileni...
متن کاملCorrelations between the CagA Antigen and Serum Levels of Anti-Helicobacter pylori IgG and IgA in Children
We tested correlations between anti-Helicobacter pylori IgG and IgA levels and the urease test, anti-CagA protein antibody, degree of gastritis, and age. In total, 509 children (0-15 years) were enrolled. Subjects were stratified as 0-4 years (n = 132), 5-9 years (n = 274), and 10-15 years (n = 103) and subjected to the urease test, histopathology, ELISA, and western blot using whole-cell lysat...
متن کاملCharacterizing Helicobacter pylori cagA in Myanmar
Background/Aims Differences in the Helicobacter pylori infection rate are not sufficient to clarify the dissimilarity of gastric cancer incidence between Myanmar and its neighboring countries. To better understand this trend, the H. pylori virulence gene cagA was characterized in Myanmar. Methods Glutamate-proline-isoleucine-tyrosine-alanine (EPIYA) patterns and CagA multimerization (CM) moti...
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ژورنال
عنوان ژورنال: Clinical & Experimental Immunology
سال: 2003
ISSN: 0009-9104
DOI: 10.1111/j.1365-2249.2003.02304.x