Taysha Gene Therapies, Inc. (Nasdaq: TSHA) (Taysha or the Company), a clinical-stage biotechnology company focused on advancing adeno-associated virus (AAV)-based gene therapies for severe monogenic diseases of the central nervous system (CNS), today announced the completion of dosing in the REVEAL pivotal trial and reported positive longer-term clinical data from Part A of the REVEAL Phase 1/2 trials evaluating TSHA-102 for the treatment of Rett syndrome.