Technology Review article discusses the finding of Crispr modified Macaque experiment in China, originally reported in Cell.
Why does this matter? Crispr is a system of DNA modification found and described in bacteria and more recently used for genetic manipulation in bacterial and other systems. It has a lot of potential for direct repair of genetic defects without shotgunning accidental changes around the rest of the cell's genome. A proof of concept experiment in primates is a big step towards usefulness for human genetic diseases.
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