Researchers edited the DNA of viable human embryos in U.S. for the first time, but don't freak out yet

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In a step that some of the nation’s leading scientists have long warned against and that has never before been accomplished, biologists in Oregon have edited the DNA of viable human embryos efficiently and apparently with few mistakes, according to a report in Technology Review.

The experiment, using the revolutionary genome-editing technique CRISPR-Cas9, was led by Shoukhrat Mitalipov of Oregon Health and Science University. It went beyond previous experiments using CRISPR to alter the DNA of human embryos, all of which were conducted in China, in that it edited the genomes of many more embryos and targeted a gene associated with a significant human disease. Read more…

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