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Allergy and worms: let's bring back old friends?

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Exposure to parasitic worms (helminths) may protect against allergies, but some infections can worsen them. Research explores helminth therapies for treating immune dysregulatory diseases like allergy.

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Area of Science:

  • Immunology
  • Parasitology
  • Epidemiology

Background:

  • Parasitic worms (helminths) manipulate host immune systems, potentially offering protection against allergic diseases.
  • Reduced helminth exposure in industrialized nations correlates with increased allergy prevalence.
  • However, specific helminth infections can paradoxically induce allergic phenotypes.

Purpose of the Study:

  • To review epidemiological and experimental studies on helminth infections and allergy.
  • To discuss the therapeutic potential of helminths or their molecules for allergic diseases, focusing on clinical trials.

Main Methods:

  • Review of existing literature on helminth-host immune interactions.
  • Analysis of epidemiological data linking helminth exposure to allergy prevalence.
  • Examination of experimental studies and clinical trial outcomes for helminth-based therapies.

Main Results:

  • Numerous studies indicate that certain helminth infections confer protection against the development of allergic diseases.
  • Clinical trials using helminth exposure (e.g., Trichuris suis, Necator americanus) show safety in controlling inflammation.
  • The primary objective remains identifying specific parasite-derived molecules responsible for these immunomodulatory effects.

Conclusions:

  • Helminth infections present a complex relationship with allergic diseases, offering potential protective mechanisms.
  • Helminth therapies are a safe strategy for managing aberrant inflammation, but further research is needed.
  • Identifying key immunomodulatory molecules from helminths is crucial for developing targeted treatments for allergies.