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Pathogenicity and virulence of Helicobacter pylori: A paradigm of chronic infection

Marguerite Clyne1,2, Tadhg Ó Cróinín2,3

  • 1School of Medicine, University College Dublin, Dublin, Ireland.

Virulence
|December 26, 2024
PubMed

Insights

Helicobacter pylori infection is common and persistent, causing stomach issues like gastritis, ulcers, and cancer. Virulence factors and host interactions determine disease severity.

Area of Science:

  • Microbiology
  • Gastroenterology
  • Infectious Diseases

Background:

  • * *Helicobacter pylori* is a widespread bacterial pathogen infecting humans lifelong.
  • * Infection commonly leads to gastritis and can cause peptic ulcers and gastric cancer.
  • * Virulence factors are crucial for bacterial survival and pathogenesis.

Purpose of the Study:

  • * To review the virulence factors of *H. pylori*.
  • * To discuss the interplay between *H. pylori* and host factors in determining disease outcomes.
  • * To understand the mechanisms of *H. pylori* colonization and pathogenesis.

Main Methods:

  • * Literature review of studies on *H. pylori* infection, virulence, and host interactions.
  • * Analysis of the role of specific virulence factors such as urease, flagella, and outer membrane proteins.
  • * Examination of the type 4 secretion system's role in subverting host cell signaling.

Main Results:

  • * *H. pylori* employs multiple virulence factors for colonization and persistence.
  • * Virulence factors include urease, flagella, outer membrane proteins, and a type 4 secretion system.
  • * Host and environmental factors significantly influence the clinical outcomes of *H. pylori* infection.

Conclusions:

  • * *H. pylori* pathogenesis is multifactorial, involving bacterial virulence and host responses.
  • * Understanding these interactions is key to predicting and managing *H. pylori*-associated diseases.
  • * Further research into host-pathogen interactions can guide therapeutic strategies.

Keywords:
Helicobacter pyloriduodenal ulcerepidemiologygastric cancergastritisvirulence

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