It is ethical to transplant human stem cells into nonhuman embryos
Phillip Karpowicz1, Cynthia B Cohen2
& Derek van der Kooy1
1
Phillip Karpowicz is at the Institute of Medical Science and Derek van der Kooy is in the Department of Medical Genetics, University of Toronto, Toronto, Ontario, Canada, M5R 1A8
2
Cynthia B. Cohen is at the Kennedy Institute of Ethics, Georgetown University, Washington DC 20057, USA.
Human/nonhuman stem cell chimeras will be increasingly applied to study human cells in developing nonhuman animals. Such experiments raise a number of issues that may create further controversy in the stem cell field. Here we outline the scientific value and ethical ramifications of such studies, and suggest how such experiments may be conducted ethically.
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