PTC Therapeutics, Inc., reported the discontinuation of preclinical and early research programs in gene therapy as part of a strategic portfolio prioritization. PTC will continue its development and global commercialization of Upstaza, the first-ever approved gene therapy directly administered to the brain. As a result of the prioritization, estimated reductions of approximately fifteen percent in residual 2023 operating expenses (OPEX) are expected. Additional 2023 OPEX guidance will be provide...