Related Experiment Video
Updated: Jun 27, 2026
07:36
Modeling Encephalopathy of Prematurity Using Prenatal Hypoxia-ischemia with Intra-amniotic Lipopolysaccharide in Rats
Published on: November 20, 2015
Factors to consider when selecting animal models for postnatal teratology studies
Journal of Environmental Pathology and Toxicology
|September 1, 1978
Summary
Selecting animal models for predicting human postnatal teratogenic hazards requires careful consideration of species-specific developmental stages. More research is needed to understand comparative pharmacokinetics and pharmacodynamics for accurate risk assessment.
Area of Science:
- Developmental Toxicology
- Pharmacology
- Comparative Medicine
Background:
- Choosing appropriate animal models is crucial for predicting postnatal teratogenic hazards in humans.
- Understanding xenobiotic interactions with the mother, placenta, fetus, and nursing young is complex.
- Physiological changes during gestation and postnatal development vary significantly across species.
Purpose of the Study:
- To identify key factors for selecting animal models to predict human postnatal teratogenic risks.
- To highlight the challenges in assessing chemical safety during sensitive developmental periods.
Main Methods:
- Review of factors influencing xenobiotic interactions during development.
- Discussion of species-specific physiological dynamics during gestation and lactation.
- Emphasis on the need for comparative pharmacokinetic and pharmacodynamic data.
Main Results:
- Animal model selection for teratogenicity prediction is challenging due to dynamic physiological changes.
- Identifying critical developmental periods for chemical exposure is difficult due to subtle teratogenic effect indicators.
- Current knowledge on comparative maternal, placental, fetal, and neonatal pharmacokinetics/pharmacodynamics is insufficient.
Conclusions:
- Intelligent evaluation of numerous chemicals as potential postnatal teratogens for humans is currently not feasible.
- Further research into comparative developmental pharmacology and toxicology is essential.
- Species-specific considerations are paramount in preclinical teratogenicity assessments.
More Related Videos
Related Concept Videos
02:43Mouse Models of Cancer Study
Mice have long served as models for studying human biology and pathology because of their phylogenetic and physiological similarity with humans. They are also easy to maintain and breed in the laboratory, and hence, many inbred strains are now available for research. Studies on mice have contributed immeasurably to our understanding of cancer biology.
The development of transgenic, knockout, and knock-in mice has led to an exponential increase in their use as model organisms in research,...
The development of transgenic, knockout, and knock-in mice has led to an exponential increase in their use as model organisms in research,...
01:07Teratogenicity
The ability of a drug to produce structural deformations and functional abnormalities in the developing embryo or the fetus is called teratogenicity, and the drug producing this effect is known as a teratogen. Teratogenic effects include stillbirth, miscarriage, intrauterine growth restriction, and neurocognitive delay. A teratogen may affect the embryo at different stages of development, which is important in determining the type and extent of the damage. During blastocyst formation, the early...
01:23Toxicity Testing in Animals
Toxicity tests in animals are grounded on two main assumptions: first, the effects observed in laboratory animals can be extrapolated to humans, especially when adjusted for body surface area; second, high-dose exposure in animals is essential to identify potential human hazards from lower doses. This is based on the quantal dose-response concept, which faces the challenge of extrapolating results from relatively few test animals to much larger human populations. For example, a 0.01% incidence...