Current and future needs for developmental toxicity testing.

Area of Science:

• Toxicology
• Risk Assessment
• Regulatory Science

Background:

• Developmental toxicity testing is integral to regulatory risk assessment for pharmaceuticals, chemicals, and consumer products.
• Current in vivo study designs for hazard characterization and dose-response assessment have remained largely unchanged for decades.
• Existing methods are well-established but present opportunities for modernization.

Purpose of the Study:

• To review the current use of developmental toxicity testing in regulatory assessments.
• To explore opportunities for incorporating new technologies and innovative approaches into developmental toxicology.
• To evaluate the potential benefits of evolving testing paradigms for regulatory decision-making.

Main Methods:

• Review of current practices in developmental toxicity testing across various regulatory bodies.
• Identification and discussion of emerging technologies and alternative approaches (in vitro, nonmammalian species, in silico).
• Analysis of the potential impact of these advancements on the existing regulatory assessment framework.

Main Results:

• Developmental toxicology data are essential for screening, evaluation, labeling, and hazard characterization of numerous substances.
• Traditional in vivo study designs remain the cornerstone of current regulatory assessments.
• New technologies offer potential for faster screening, reduced resource commitment, and deeper mechanistic understanding.

Conclusions:

• Incorporating new technologies and approaches can enhance developmental toxicology testing efficiency and effectiveness.
• Advancements may refine risk assessment by improving understanding of developmental toxicity mechanisms.
• The evolution of testing paradigms must maintain the utility of developmental toxicology data for regulatory needs.