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The goal was to see if a gene introduced into an abnormal embryo could be traced in stem cells that are harvested from the embryo, he said. Such work could help shed light on why abnormal embryos fail to develop, he said. No stem cells were recovered from the human embryo, said Rosenwaks, noting that abnormal embryos frequently don't develop well enough to produce them. Marcy Darnovsky, associate executive director of the Center for Genetics and Society, said the Cornell scientists were developing techniques that others might use to make genetically modified people, "and they're doing it without any kind of public debate." A London-based group called Human Genetics Alert similarly criticized the work. But Kathy Hudson, director of the Genetics and Public Policy Center in Washington, D.C., said she's not troubled by the work. She said the idea of successfully modifying babies by inserting genes remains a technically daunting challenge. "We're not even close to having that technology in hand to be able to do it right," she said, and it would be ethically unacceptable to try it when it's unsafe. Related Links: Center for Reproductive Medicine and Infertility |
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