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Perspectives on Implementing Virtual Control Groups in Developmental and Reproductive Toxicity Studies.

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Summary
This summary is machine-generated.

Virtual control groups (VCGs) can reduce animal use in toxicology studies by using historical control data (HCD). A hybrid approach combining VCGs with concurrent control groups (CCGs) is proposed for developmental and reproductive toxicity studies.

Keywords:
DARTEFDT studiesFEED studiesHCDPPND studiesVCVCGconcurrent controlshistorical controlsvirtual controls

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Area of Science:

  • Toxicology
  • Animal Welfare
  • Regulatory Science

Background:

  • Virtual control groups (VCGs) were proposed in 2020 to reduce animal use in nonclinical toxicology by utilizing historical control data (HCD).
  • Increasing publications highlight implementation challenges, yet harmonized laboratories are well-suited for VCG adoption.
  • Developmental and reproductive toxicity studies represent a significant area for animal number reduction.

Purpose of the Study:

  • To propose a framework for implementing VCGs in routine Good Laboratory Practice (GLP) nonclinical toxicology studies.
  • To address challenges and risks associated with VCG implementation.
  • To support the reduction of animal usage in toxicology research.

Main Methods:

  • Application of a six-step VCG implementation framework to GLP studies.
  • Validation through retrospective and prospective trials.
  • Proposal of a hybrid approach combining a concurrent control group (CCG) with virtual control (VC) animals.

Main Results:

  • Discussion of previously identified risks and challenges in VCG implementation.
  • A hybrid approach is suggested to mitigate concerns, incorporating a small CCG with VC animals.
  • The hybrid approach ensures monitoring for disease/environmental changes and preserves HCD.

Conclusions:

  • Laboratories conducting harmonized studies should plan for VCG implementation in rodent and rabbit developmental and reproductive toxicity studies.
  • A harmonized approach across multiple laboratories could facilitate regulatory approval.
  • Timely implementation of VCGs, particularly the hybrid model, can significantly reduce animal numbers in critical toxicology studies.