An international group of scientists led by Shoukhrat Mitalipov of Oregon Health and Science University, USA, has successfully changed the DNA of a large number of one-cell human embryos with the CRISPR-Cas9 gene-editing technique.1 The researchers targeted a mutation in a gene called MYBPC3 known to cause hypertrophic cardiomyopathy, the leading cause of sudden death in young athletes.
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