Researchers reduce the severity of hereditary deafness in mice with the delivery of CRISPR-Cas9 protein-RNA complexes that inactivate a mutant gene in their inner ears.
Upping a gene’s expression in rat brains made them better learners and normalized the activity of hundreds of other genes to resemble the brains of younger animals.
With a clinical trial underway to restore vision optogenetically, researchers also see promise in using the technique to treat deafness, pain, and other conditions.