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Related Experiment Videos

Helminths and mucosal immune modulation.

Joel V Weinstock1

  • 1Division of Gastroenterology, Department of Internal Medicine, Tufts New England Medical Center, 750 Washington Street, P.O. Box 233, Boston, MA 02111, USA. jweinstock2@Tufts-NEMC.org

Annals of the New York Academy of Sciences
|October 24, 2006
PubMed
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Parasitic worms (helminths) may protect against inflammatory bowel diseases like ulcerative colitis and Crohn's disease by modulating the immune system. Their historical presence might explain lower rates of these immune-mediated conditions.

Area of Science:

  • Immunology
  • Gastroenterology
  • Epidemiology

Background:

  • Geographic and ethnic variations in inflammatory bowel disease (IBD) suggest environmental influences on disease risk.
  • Improved hygiene has reduced exposure to helminths (parasitic worms), potentially increasing IBD prevalence.
  • Helminths modulate host immunity, offering protection against experimental colitis and other immune disorders.

Purpose of the Study:

  • To explore the role of helminths in the immune system's regulation.
  • To investigate the potential protective effects of helminths against immune-mediated diseases like IBD.
  • To understand how helminthic colonization influences mucosal immunity and disease development.

Main Methods:

  • Review of studies on helminth exposure and immune responses.

Related Experiment Videos

  • Analysis of animal models of colitis and helminthic treatment.
  • Examination of helminth-induced changes in T-cell subsets and cytokine profiles (IL4, TGFbeta, IL10).
  • Investigation of helminth effects on innate immunity pathways, including TLR4.

    • Main Results:

    • Helminth exposure protects animals from experimental colitis.
    • Helminthic colonization can treat existing murine and human IBD.
    • Helminths induce protective Th2 and regulatory T-cell responses in the gut mucosa.
    • Key cytokines (IL4, TGFbeta, IL10) and altered innate immunity (TLR4) are involved in helminth-mediated protection.

    Conclusions:

    • Helminths significantly influence mucosal and systemic immunity.
    • The immune-modulating effects of helminths may protect against immune-mediated diseases such as IBD.
    • Loss of helminth exposure due to hygiene could contribute to increased IBD prevalence.