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Related Experiment Videos

Predictive testing for autoimmunity.

R Pieters1, J Ezendam, R Bleumink

  • 1IRAS-Immunotoxicology, Utrecht University, P.O. Box 80176, 3508 TD, The Netherlands. r.pieters@iras.uu.nl

Toxicology Letters
|June 8, 2002
PubMed
Summary
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New animal models can help predict chemical-induced allergies and autoimmune disorders. This two-tiered strategy screens for immunostimulatory potential and then tests specific chemicals for allergenic or autoimmunogenic effects.

Area of Science:

  • Immunotoxicology
  • Drug Safety
  • Predictive Toxicology

Background:

  • Chemicals, especially drugs, can trigger systemic allergic or autoimmune-like conditions.
  • These effects are often overlooked in standard toxicity tests due to complex causes and genetic factors.
  • Existing animal studies for chemically induced systemic allergy or autoimmunity are limited.

Purpose of the Study:

  • To present novel animal models for a predictive, two-tiered immunotoxicity testing strategy.
  • To enable screening for immunostimulatory potential and detailed assessment of allergenic/autoimmunogenic risks.
  • To address the scarcity of reliable animal models in immunotoxicology.

Main Methods:

  • A first-tier screening assay: the popliteal lymph node assay (PLNA), with or without reporter antigens.

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  • A second-tier approach involving relevant exposure routes in specific mouse or rat strains.
  • Utilizing 'normal' inbred mice and Brown Norway rats for exposure models.

    • Main Results:

    • The popliteal lymph node assay has been tested with over 100 chemicals.
    • Exposure route models have been tested with a limited number of chemicals to date.
    • Neither the PLNA nor the proposed second-tier models are fully validated yet.

    Conclusions:

    • The proposed two-tiered strategy offers a framework for predicting chemical-induced immunotoxicity.
    • Further development and validation are crucial for incorporating these models into regulatory testing.
    • Integrating current knowledge of chemical-induced allergy and autoimmunity is key for advancing predictive immunotoxicology.