One science-driven approach for the regulatory implementation of alternative methods: A multi-sector perspective

Area of Science:

• Regulatory science
• Toxicology
• In vitro methods

Background:

• EU regulations mandate alternative methods to animal testing.
• The last decade saw increased adoption of alternative approaches and new technologies for hazard identification and risk assessment.
• The European Partnership for Alternative Approaches to Animal Testing (EPAA) reviewed implementation challenges across industries.

Purpose of the Study:

• To review challenges in implementing alternative methods to animal testing across various industry sectors.
• To identify scientific and technological gaps hindering the broader application of non-animal alternatives.
• To discuss strategies for science-driven implementation of alternative methods.

Main Methods:

• Review of challenges discussed at an EPAA meeting.
• Analysis of progress in animal testing reduction and refinement.
• Identification of key areas for future development and implementation.

Main Results:

• Progress in animal testing reduction and refinement acknowledged through scientifically robust approaches.
• Identified challenges include characterizing toxicity pathways, developing assays for scientific gaps, linking in vitro to in vivo outcomes, defining applicability domains, and appropriate implementation.
• Harmonized regulatory acceptance across regions is critical for adopted methods like vaccine batch testing.

Conclusions:

• Significant constraints to applying non-animal alternatives stem from existing scientific knowledge gaps and technological limitations.
• A science-driven approach to identifying the most appropriate methods is crucial for reducing animal testing across multiple sectors.
• Continued research and development are needed to overcome current barriers and fully realize the potential of alternative methods.