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Reprod Toxicol ; 32(2): 213-9, 2011 Sep.
Article in English | MEDLINE | ID: mdl-21704152

ABSTRACT

The zebrafish embryotoxicity/teratogenicity assay is described as a useful alternative screening model to evaluate the effect of drugs on embryofoetal development. Fertilized eggs were exposed to different concentrations of 15 compounds with teratogenic (8) and non-teratogenic (7) potential until 96h post-fertilization when 28 morphological endpoints and the level of compound uptake was assessed. The majority of drugs testing positive in mammals was also positive in zebrafish (75% sensitivity), while a relative high number of false positives were noted (43% specificity). Compound uptake determination appears useful for clarifying classifications as teratogenic or potential overdose although assay sensitivity could be improved to 71% if the exposure threshold, previously suggested as ∼50ng/larvae, is reconsidered. The zebrafish assay shows some potential, though limited in its current form, as a screening tool for developmental toxicity within Janssen drug development. Further assay refinement with respect to endpoints and body burden threshold is required.


Subject(s)
Embryo, Nonmammalian/drug effects , Embryonic Development/drug effects , Teratogens/toxicity , Toxicity Tests , Zebrafish/embryology , Animals , Body Burden , Congenital Abnormalities/etiology , Dose-Response Relationship, Drug , Embryo, Nonmammalian/abnormalities , Endpoint Determination , False Positive Reactions , Teratogens/pharmacokinetics , Toxicity Tests/methods , Toxicity Tests/standards , Toxicity Tests/statistics & numerical data , Zebrafish/abnormalities
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