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How does replacement reduce the use of animals in scientific research?
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Animal rights
A PETA (People for the Ethical Treatment of Animals) demonstration in Seoul, South Korea, against the use of animals for fur in clothing.
Replacement is one of the "three Rs" principleāalongside reduction and refinementādesigned to minimize and eventually eliminate the use of animals in scientific and medical research. It functions by utilizing alternative strategies that avoid the use of live animals entirely.1
Key methods of replacement include:
- In vitro studies: Researchers use cell culture techniques, such as testing on human cells or tissues grown in petri dishes or plastic wells.12
- Advanced modeling: Technologies like computer modeling and 3D tissue bioprinting allow scientists to simulate biological responses and test drug toxicity without animal subjects.12
- Human-based models: The development of artificial human skin, such as EpiDerm, provides a more accurate alternative to testing chemicals on animal skin. Additionally, researchers may conduct human volunteer studies, which are ethically distinct because human participants can provide informed consent.21
By adopting these innovative technologies, the scientific community can achieve reliable, often more human-relevant results while upholding the ethical principle of protecting sentient beings from unnecessary harm.12