Regulation and evolving science: neurobehavioral toxicology.

Area of Science:

• Environmental toxicology
• Neurobehavioral toxicology
• Regulatory science

Background:

• Governmental regulatory agencies face challenges integrating novel scientific disciplines.
• The Environmental Protection Agency (EPA) requires toxicological testing for pesticides and other compounds.
• Existing toxicological endpoints may not fully capture all potential health and safety risks.

Purpose of the Study:

• To explore policy and scientific issues surrounding the incorporation of emerging toxicological endpoints.
• To use neurobehavioral toxicology as a case study for introducing new biological endpoints into regulatory evaluation.
• To address the rationale for expanding toxicity testing, current regulatory status, alternative incorporation methods, and consequences of new endpoint requirements.

Main Methods:

• Policy analysis of regulatory processes for incorporating new scientific data.
• Case study approach focusing on neurobehavioral toxicology within the EPA's framework.
• Discussion of scientific considerations for selecting and validating test systems, including test selection, strategy, and assessment of validity, reliability, and sensitivity.

Main Results:

• Expansion of toxicity testing endpoints is debated, with neurobehavioral toxicology serving as a key example.
• Various policy and scientific challenges exist in integrating new toxicological assessments.
• The selection, strategy, and validation of scientific tests are critical for regulatory acceptance.

Conclusions:

• Integrating new scientific endpoints like neurobehavioral toxicology into regulatory frameworks is complex.
• Careful consideration of policy implications, scientific validity, and testing strategies is essential for effective risk assessment.
• The process requires a thorough evaluation of the benefits and challenges associated with expanding toxicological testing.