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Jeanna A Bugaytsova1,2, Kristof Moonens3,4,5, Artem Piddubnyi1,2,6

  • 1Department of Medical Biochemistry and Biophysics, Umeå University, SE90187 Umeå, Sweden.

Biorxiv : the Preprint Server for Biology
|June 9, 2023
PubMed

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Summary
This summary is machine-generated.

Most people carry Helicobacter pylori, but protective antibodies can block its attachment. Low levels of these BabA-blocking antibodies increase the risk of duodenal ulcers, suggesting a key role in preventing gastric disease.

Area of Science:

  • Immunology
  • Microbiology
  • Gastroenterology

Background:

  • Helicobacter pylori infection is prevalent globally, often leading to chronic inflammation and severe gastric diseases like ulcers and cancer.
  • While most infections are asymptomatic, a subset progresses to significant pathology.

Approach:

  • Investigated a protective mechanism involving antibodies against the H. pylori adhesin BabA.
  • Demonstrated that these antibodies mimic blood group glycans, blocking BabA-mediated bacterial attachment to the gastric mucosa.

Key Points:

  • Naturally occurring antibodies can inhibit H. pylori attachment by targeting the BabA adhesin.
  • These antibodies function by mimicking the interaction between BabA and ABO blood group antigens on gastric cells.
  • Low titers of BabA-blocking antibodies correlate with an elevated risk of developing duodenal ulcer disease.
Keywords:
ABO blood group antigensBabAHelicobacter pyloriadhesionbroadly blocking antibodyduodenal ulcer diseasegastric cancerglycan mimicry

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Conclusions:

  • A natural antibody-mediated mechanism reduces H. pylori colonization and associated inflammation.
  • The efficacy of this protective response is linked to antibody levels, influencing disease progression.
  • Targeting or enhancing these antibodies could offer a novel strategy for preventing H. pylori-induced gastric diseases.