Oral immunization with urease and Escherichia coli heat-labile enterotoxin is safe and immunogenic in Helicobacter pylori-infected adults
Summary
This summary is machine-generated.Oral immunization with Helicobacter pylori urease showed it is safe and triggers an immune response in infected adults. While not eradicating the infection, it significantly reduced H. pylori in the stomach.
Area Of Science
- Gastroenterology
- Immunology
- Microbiology
Background
- Helicobacter pylori infection is a global health concern.
- Oral immunization with urease has shown promise in animal models for curing H. pylori infections.
- Therapeutic immunization strategies are being explored for human H. pylori infections.
Purpose Of The Study
- To evaluate the safety and immunogenicity of oral recombinant H. pylori urease in H. pylori-infected adults.
- To assess the impact of oral urease immunization on H. pylori infection density.
Main Methods
- A double-blind, randomized study involving 26 H. pylori-infected volunteers.
- Participants received weekly oral doses of varying urease concentrations (20, 60, 180 mg) combined with heat-labile enterotoxin (LT) or placebo.
- Safety, immune responses (serum and cellular), and gastric H. pylori levels were monitored.
Main Results
- Oral urease immunization was generally well-tolerated, with diarrhea reported in 66% of participants.
- Significant increases in antiurease serum immunoglobulin A titers and circulating immunoglobulin A-producing cells were observed.
- No eradication of H. pylori was achieved, but a significant reduction in gastric H. pylori density was noted.
Conclusions
- Oral immunization with H. pylori urease and LT is safe and immunogenic in infected individuals.
- The formulation induced a measurable immune response and reduced bacterial load.
- Further development of vaccine formulations may be necessary to achieve curative immunity.
View abstract on PubMed