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The local lymph node assay in 2014.

David A Basketter1, G Frank Gerberick, Ian Kimber

  • 1From *DABMEB Consultancy Ltd, Sharnbrook, Bedfordshire, United Kingdom; †Procter & Gamble, Mason, Cincinnati, OH; and ‡Faculty of Life Sciences, University of Manchester, Manchester, United Kingdom.

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Summary
This summary is machine-generated.

The local lymph node assay is a validated method for identifying skin sensitizers and measuring their potency. It remains the standard for developing alternative testing methods.

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Area of Science:

  • Toxicology and risk assessment
  • Dermatology and chemical safety

Background:

  • Toxicology aims to predict adverse health and environmental effects of materials.
  • Skin sensitization is a key concern in chemical safety assessments.
  • The local lymph node assay (LLNA) was a pioneering validated method.

Purpose of the Study:

  • To highlight the significance of the local lymph node assay (LLNA) in toxicology.
  • To establish the LLNA as a benchmark for alternative testing strategies.
  • To underscore the LLNA's role in hazard identification and potency assessment.

Main Methods:

  • The study focuses on the historical and ongoing impact of the LLNA.
  • It reviews the validation and adoption of the LLNA as a standard.
  • The LLNA provides an objective endpoint with quantitative potency measurement.

Main Results:

  • The LLNA was the first fully validated method for skin sensitizers.
  • It offered objective, quantitative measures of sensitizing potency.
  • The LLNA serves as the primary standard for alternative methods development.

Conclusions:

  • The LLNA has been instrumental in advancing skin sensitization testing.
  • Its validated status and quantitative output make it a crucial reference.
  • Fifteen years on, the LLNA continues to guide the development of in vitro, in chemico, and in silico alternatives.