Perspectives on chick embryo models in developmental and reproductive toxicity screening

Area of Science:

• Developmental Toxicology
• Teratology
• Embryonic Development

Background:

• Teratology, the study of congenital anomalies, is crucial for assessing risks of teratogens in preclinical research.
• Innovative methodologies are essential for evaluating potential impacts on fetal development.
• The chicken embryo model offers a valuable platform for studying human embryonic development due to its biological similarities.

Purpose of the Study:

• To review the utility of chicken embryonic models in developmental toxicity testing.
• To highlight the advantages and disadvantages of using chick embryos.
• To address challenges related to physiological differences from mammalian systems.

Main Methods:

• Utilizing ex ovo and in ovo assays.
• Employing chorioallantoic membrane assays.
• Applying embryonic culture techniques for toxicity screening.

Main Results:

• Chicken embryo models are accessible, cost-effective, and biologically relevant for vertebrate development.
• These models enable efficient screening of developmental toxicity.
• Limitations include the absence of a placenta and maternal metabolism, affecting nutrient and hormone regulation studies.

Conclusions:

• Chicken embryo models provide significant insights into developmental toxicity despite physiological differences.
• Understanding and mitigating limitations are key to maximizing their utility.
• This model contributes to comprehending the developmental impacts of various agents.