Functional dyspepsia, H. pylori and post infectious FD

Area of Science:

• Gastroenterology
• Microbiology
• Immunology

Background:

• Functional dyspepsia (FD) is defined by chronic dyspepsia symptoms without an identifiable organic cause.
• Potential contributing factors to FD include delayed gastric emptying, H. pylori infection, altered gut motility, and impaired visceral sensitivity.
• The relationship between H. pylori and FD is debated, though eradication therapy shows a modest benefit in H. pylori-positive FD patients.

Purpose of the Study:

• To explore the association between H. pylori infection, post-infectious dyspepsia, and functional dyspepsia.
• To investigate the role of infections in the pathophysiology of functional dyspepsia.
• To evaluate the potential for treating infections to improve FD symptoms.

Main Methods:

• Review of existing literature on H. pylori, gut infections, and functional dyspepsia.
• Analysis of meta-analyses on H. pylori eradication therapy efficacy in FD.
• Examination of studies investigating post-infectious dyspepsia and associated duodenal immune changes.

Main Results:

• H. pylori infection is present in a subset of FD patients, with eradication therapy yielding a small but significant improvement.
• Post-infectious dyspepsia is linked to acute gastroenteritis and characterized by specific symptoms like early satiety and nausea.
• Duodenal immune alterations, including T-cell aggregates and macrophage changes, are observed in infectious FD, suggesting impaired inflammatory response resolution.

Conclusions:

• H. pylori infections and other gut infections are associated with a subset of functional dyspepsia patients.
• Treatment targeting underlying infections may lead to symptom improvement in these specific FD patient groups.