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The guinea pig as a model for predicting photoallergic contact dermatitis
Author(s) -
Jordan William P.
Publication year - 1982
Publication title -
contact dermatitis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.524
H-Index - 96
eISSN - 1600-0536
pISSN - 0105-1873
DOI - 10.1111/j.1600-0536.1982.tb04155.x
Subject(s) - guinea pig , contact allergy , dermatology , allergic contact dermatitis , patch test , cosmetics , contact dermatitis , pig skin , chemistry , toxicology , medicine , allergy , food science , biology , immunology , pathology
This report describes modifications in the techniques used for both the induction and elicitation of photoallergic contact dermatitis (PACD) in the guinea pig. These changes have improved the reliability of this animal as the model of choice for screening chemicals or products for (heir tendency to produce PACD. The induction period consists of 15 exposures of the test substance to shoulder skin that has been abraded with a nylon brush rotating at 13,000 rpm. One hour later, the KM site is irradiated with broadband UVA from a source having some irradiance below 320 nm (UVA/b). The animals receive 450 J/cm 2 of UVA during the three‐week induction period. The elicitation (challenge) test is repeated fur two consecutive days. Each day, the test material, if a liquid, is applied to two sties even 30 lo 60 min for 6 h; then one of the sites receives 20 J/cm 2 of UVA. These photo‐induction and photo‐elicitation procedures have demonstrated that low‐level concentrations (0.25% range) of 6‐melhyl coumarin or musk ambrette will both induce and elicit PACD in the guinea pig. This report adds more evidence that the induction of PACD in the guinea pig is dependent on broadband UVA.