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Related Experiment Videos

CD4+CD25+ suppressor T cells regulate pathogen induced inflammation and disease.

Sukanya Raghavan1, Jan Holmgren

  • 1Department of Medical Microbiology and Immunology, The Göteborg University Vaccine Research Institute (GUVAX), P.O. Box 435, 405 30 Göteborg, Sweden. sukanya.raghavan@microbio.gu.se

FEMS Immunology and Medical Microbiology
|May 4, 2005
PubMed
Summary

Natural CD4+CD25+ regulatory T cells (Treg) suppress autoimmune disease and inflammation. However, pathogen-specific Treg can prolong infections by suppressing protective immunity, impacting diseases like Helicobacter pylori.

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Area of Science:

  • Immunology
  • Microbiology
  • Pathology

Background:

  • CD4+CD25+ regulatory T cells (Treg) are crucial for immune homeostasis and self-tolerance.
  • Treg cells recognize a wide array of self and non-self antigens, controlling diverse immune responses.
  • While essential for preventing autoimmunity, Treg activity during infections presents a dual role.

Purpose of the Study:

  • To review the multifaceted role of Treg in modulating immune responses during infections.
  • To specifically examine Treg involvement in bacterial, fungal, and viral infections, focusing on inflammation and chronicity.
  • To analyze the impact of Treg on Helicobacter pylori-induced gastric inflammation and associated pathologies.

Main Methods:

  • Literature review of existing studies on Treg function in infectious diseases.

Related Experiment Videos

  • Analysis of experimental data from mouse models of infection.
  • Examination of human clinical data from naturally infected individuals.

    • Main Results:

    • Pathogen-specific Treg can prevent excessive inflammation but may also enhance pathogen load and persistence.
    • Treg play a protective role against severe gastric inflammation in Helicobacter pylori infections.
    • Treg activity in H. pylori infection promotes bacterial colonization, potentially increasing the risk of duodenal ulcers.

    Conclusions:

    • Treg cells exhibit a complex, context-dependent role in infectious diseases, balancing immune suppression and host defense.
    • Treg are critical in managing inflammation in H. pylori infections but contribute to bacterial persistence.
    • Understanding Treg modulation is vital for developing therapeutic strategies against infectious diseases and their complications.