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A proposed testing framework for developmental immunotoxicology (DIT).

Michael P Holsapple1, Leigh Ann Burns-Naas, Kenneth L Hastings

  • 1ILSI Health Science and Environmental Sciences Institute, Washington, DC 20005, USA. mholsapple@ilsi.org

Toxicological Sciences : an Official Journal of the Society of Toxicology
|October 1, 2004
PubMed
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Experts recommend integrating developmental immunotoxicology (DIT) assessments into standard toxicity testing. The rat is the preferred model, using validated immune assays within flexible protocols for hazard identification.

Area of Science:

  • Immunotoxicology
  • Developmental Toxicology
  • Risk Assessment

Background:

  • Assessing developmental immunotoxicology (DIT) is crucial for hazard identification.
  • Consensus on appropriate DIT methods and testing conditions was lacking.

Purpose of the Study:

  • To reach consensus on the most appropriate methods for developmental immunotoxicology (DIT) assessment.
  • To determine conditions under which DIT testing may be required.

Main Methods:

  • A roundtable discussion involving thirty immunotoxicology experts from the U.S. and E.U.
  • Expert consensus on preferred models, assay validation, and protocol integration.

Main Results:

  • The rat is the preferred animal model for DIT.

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  • DIT protocols should utilize validated immune assays and integrate into existing toxicity studies.
  • Flexible experimental designs are recommended, adaptable to specific chemical or drug assessment needs.

    • Conclusions:

    • DIT assessment should be integrated into standard developmental and reproductive toxicity protocols.
    • A single study design can assess critical developmental windows.
    • Triggers for DIT include structure-activity relationships, prior toxicity data, and anticipated exposure in neonates/juveniles.