![A cross-section of mouse spinal cord tissue showing cells in which the CRISPR-Cas9 gene has been expressed (green).](https://mcb.berkeley.edu/sites/mcb.berkeley.edu/files/styles/article__200x200_/public/images/articles/spinalcordtissue350_DSchaffer.jpg?itok=jrzCwDwS)
MCB Professor of Neurobiology and of Chemical and Biomolecular Engineering David Schaffer and colleagues "have for the first time used CRISPR-Cas9 gene editing to disable a defective gene that causes amyotrophic lateral sclerosis, or Lou Gehrig's disease, in mice, extending their lifespan by 25 percent."
Photo Credit: David Schaffer