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CRISPR-Cas9 Gene Therapy Shows Promise in Preclinical Angelman Study

A CRISPR-Cas9-based gene therapy designed to increase the production of ubiquitin protein ligase E3A (UBE3A) — the enzyme lacking in Angelman syndrome — partially or completely corrected physical and behavioral deficits in a mouse model of the disease. The effects of a single administration of the therapy, when delivered before birth, were…