Developmental toxicity testing for safety assessment: new approaches and technologies

Area of Science:

• Toxicology
• Developmental Biology
• Genomics
• Computational Biology

Background:

• Traditional animal studies are insufficient for assessing the developmental toxicity of the 10,000-30,000 chemicals in commerce.
• There is a critical need for alternative technologies to evaluate developmental toxicity risks.
• Advancements in various scientific fields offer potential solutions for developmental safety assessment.

Purpose of the Study:

• To review novel approaches and technologies for assessing developmental toxicology.
• To explore the application of new methods in developmental safety assessment.
• To address the challenges and needs in utilizing alternative technologies for chemical hazard evaluation.

Main Methods:

• Genomics technologies for developmental safety assessment.
• Mouse embryonic stem cells for capturing developmental toxicity pathway data.
• Dynamical cell imaging of zebrafish embryos.
• Computational models of developmental pathways and systems.
• High-throughput in vitro approaches (e.g., EPA ToxCast program).

Main Results:

• Overview of diverse new technologies applicable to developmental toxicology.
• Identification of challenges in translating in vitro findings to in vivo relevance.
• Emphasis on the necessity of validating pathway-based predictions with whole-animal studies.
• Demonstration of progress towards evaluating a large chemical inventory.

Conclusions:

• New technologies are crucial for addressing the limitations of traditional developmental toxicity testing.
• Integrating genomics, stem cell assays, imaging, computational models, and high-throughput screening shows promise.
• Validation and careful application of these methods are essential for accurate developmental risk assessment.