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Correlation between serological and mucosal inflammatory responses to Helicobacter pylori
G I Pérez-Pérez1, W R Brown, T L Cover
1Department of Medicine, Vanderbilt University School of Medicine, Nashville, Tennessee 37232, USA.
Clinical and Diagnostic Laboratory Immunology
|May 1, 1994
Summary
Helicobacter pylori infection triggers significant immune responses, with specific IgG antibodies to Hp54K correlating with both acute and chronic gastric inflammation severity. These antibodies may indicate or contribute to H. pylori-induced inflammation.
Area of Science:
- Immunology
- Gastroenterology
- Microbiology
Background:
- Helicobacter pylori is a common cause of gastric mucosal inflammation.
- Understanding the host immune response is crucial for diagnosing and managing H. pylori infections.
- Humoral immune responses, including immunoglobulin G (IgG) and immunoglobulin A (IgA) subclasses, are key components of the host defense against H. pylori.
Purpose of the Study:
- To investigate the relationship between systemic humoral immune responses to Helicobacter pylori antigens and the severity of acute and chronic gastric mucosal inflammation.
- To identify specific immune markers associated with H. pylori-induced gastritis.
Main Methods:
- Gastroduodenoscopy was performed on 82 patients.
- Gastric mucosal inflammation was scored for severity.
- Systemic humoral immune responses to H. pylori antigens (whole-cell, Hp54K, vacuolating cytotoxin) were assessed using enzyme-linked immunosorbent assays (ELISAs).
- Patients were classified as H. pylori infected, uninfected, or seropositive with negative cultures/stains.
Main Results:
- Significantly greater specific serum IgG and IgA responses to H. pylori antigens were observed in infected versus uninfected patients (P < 0.001).
- Among infected patients, serum IgG responses to Hp54K and vacuolating cytotoxin correlated with acute mucosal inflammatory scores.
- Serum IgA responses to whole-cell sonicate and vacuolating cytotoxin were inversely related to chronic inflammatory scores.
- Multivariate regression analysis revealed that specific serum IgG responses to Hp54K were the only markers correlating with both acute and chronic inflammation severity (P < 0.001).
Conclusions:
- Specific serum IgG responses to Hp54K are significantly associated with the severity of both acute and chronic gastric inflammation in H. pylori-infected individuals.
- These IgG responses may serve as potential biomarkers for H. pylori-induced gastritis.
- The findings suggest that antibodies to Hp54K might play a direct role in the pathogenesis of H. pylori-associated inflammation.