Zebrafish Embryos and Larvae as Alternative Animal Models for Toxicity Testing

Area of Science:

• Toxicology
• Animal Alternative Methods
• Developmental Biology

Background:

• Ethical considerations and the 3R-principle (Replacement, Reduction, Refinement) are paramount in animal experimentation.
• Increasing laboratory animal use necessitates alternative methods for toxicological testing.
• Zebrafish (Danio rerio) possess favorable biological properties for laboratory research.

Purpose of the Study:

• To review the advantages and prerequisites of using zebrafish embryos and larvae for toxicological testing.
• To focus on the application of zebrafish in assessing cardiotoxicity, neurotoxicity, hepatotoxicity, and nephrotoxicity.
• To discuss advancements in utilizing zebrafish for organ toxicity and the role of modern laboratory techniques.

Main Methods:

• Review of existing literature on zebrafish in toxicological studies.
• Focus on pre-feeding stages of zebrafish embryos and larvae.
• Discussion of toxicokinetics, organ toxicity testing, and advanced laboratory methods.

Main Results:

• Zebrafish embryos and larvae present a viable model for toxicological assessments.
• Specific advantages for testing cardio-, neuro-, hepato-, and nephrotoxicity are highlighted.
• Integration of automation, advanced imaging, and genetic techniques can refine studies.

Conclusions:

• Zebrafish offer a valuable alternative model for toxicological testing, supporting the 3R-principle.
• Further development and application of advanced techniques will enhance zebrafish utility in toxicology.
• This approach contributes to reducing reliance on mammalian models in scientific research.