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Toxicology. 2001 Feb 2;158(1-2):59-64.

The local lymph node assay and potential application to the identification of drug allergens.

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Zeneca Central Toxicology Laboratory, Alderley Park, Macclesfield, SK10 4TJ, Cheshire,


The local lymph node assay (LLNA) is a method for the identification of skin sensitization hazard. The method is based upon measurement of proliferative responses induced in draining lymph nodes following topical exposure of mice to the test chemical. More recently the LLNA has also been used for the evaluation of relative skin sensitization potency in the context of risk assessment. Idiosyncratic drug reactions resulting from the stimulation of allergic or autoimmunogenic responses are poorly understood but represent an important clinical problem. In this article, the potential utility of the LLNA, either in a conventional modified configuration, to provide information of value in assessment the potential for systemic allergenicity is considered.

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