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Taysha Gene Therapies Regains Full Rights to Lead TSHA-102 Program in Clinical Evaluation for the Treatment of Rett Syndrome
The 2022 Option Agreement between Astellas and Taysha has expired Regaining full rights to TSHA-102 Rett syndrome program enables Taysha to focus on driving
About this update from Taysha Gene Therapies, Inc.
[{"type":"text","content":"The 2022 Option Agreement between Astellas and Taysha has expired Regaining full rights to TSHA-102 Rett syndrome program enables Taysha to focus on driving its long-term value with full strategic flexibility and optionality TSHA-102 has demonstrated compelling Part A REVEAL Phase 1/2 safety and efficacy data, received FDA Breakthrough Therapy designation and is advancing with a clear path to potential registration Dosing of the first patient in the REVEAL pivotal trial is scheduled this quarter DALLAS, Oct. 16, 2025 (GLOBE NEWSWIRE) -- 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 that the Company has regained full rights to its lead TSHA-102 program in clinical evaluation for Rett syndrome. The 2022 Option Agreement between Astellas and Taysha, which had granted Astellas the exclusive option to enter a negotiation period to obtain an exclusive license to TSHA-102 in Rett syndrome and certain rights with respect to change in control transactions involving Taysha, has expired. In accordance with the 2022 Option Agreement, Taysha delivered a TSHA-102 data package to Astellas in mid-2025 that contained the previously disclosed Part A REVEAL clinical data (May 2025 data cutoff), initiating a 90-day review period for Astellas to elect to exercise an option to trigger exclusive negotiations for a transaction. These data were shared with the U.S. Food and Drug Administration (FDA) as part of the application for, and subsequent receipt of, Breakthrough Therapy designation for TSHA-102. Following the expiration of the Option Agreement, Taysha now holds unencumbered rights to the TSHA-102 program. These previously disclosed Part A REVEAL clinical data (May 2025 data cutoff) demonstrated a generally well-tolerated safety profile and a 100% response rate post-TSHA-102 for the pivotal trial primary endpoint of the gain/regain of ≥ one defined developmental milestone, with","length":2551,"tagName":"div"}]