Exhibit 99.1 Taysha Gene Therapies Reports First Quarter 2024 Financial Results and Provides Corporate Update Completed dosing in cohort one (low dose, 5.7x1014 total vg) of REVEAL Phase 1/2 adolescent and adult trial with longer-term data supporting the safety profile and durable response of TSHA-102; enrolled first patient in cohort two (high dose, 1x1015 total vg) with dosing scheduled for Q2 2024 Dosed second pediatric patient in cohort one (low dose, 5.7x1014 total vg) of REVEAL Phase 1/2 pediatric tri ...