Incorporating the 3Rs into regulatory scientific practices

Area of Science:

• Environmental toxicology
• Chemical safety assessment
• Regulatory science

Background:

• The Office of Prevention, Pesticides, and Toxic Substances (OPPTS) within the US Environmental Protection Agency (EPA) faces daily challenges in chemical testing.
• Animal welfare and ethical considerations are increasingly important in regulatory toxicology.
• Existing testing paradigms often rely heavily on animal models.

Purpose of the Study:

• To explain current practices for the 3Rs (refining, reducing, and replacing) of animal use within OPPTS.
• To review opportunities for implementing the 3Rs in chemical safety testing.
• To present progress made by OPPTS programs in adopting the 3Rs.

Main Methods:

• Review of internal OPPTS practices and experiences.
• Analysis of opportunities for 3Rs implementation.
• Description of program-specific progress in animal use reduction.

Main Results:

• OPPTS is actively engaged in efforts to refine, reduce, and replace animal use in its testing protocols.
• Broad opportunities exist for enhancing the 3Rs across various OPPTS programs.
• Specific programs within OPPTS are demonstrating progress in adopting alternative testing strategies.

Conclusions:

• The OPPTS is committed to advancing the 3Rs in chemical safety evaluations.
• Continued implementation and exploration of the 3Rs are crucial for ethical and efficient toxicological testing.
• Progress in the 3Rs adoption within OPPTS supports the development of more sustainable and humane scientific practices.