• The FDA has granted Fast Track designation to zilganersen for treating Alexander disease (AxD), an ultra-rare neurological disorder.
• Zilganersen, developed by Ionis Pharmaceuticals, is the first investigational medicine in clinical trials for AxD, addressing an unmet need.
• Topline data from the pivotal Phase 1-3 study of zilganersen is expected in the second half of 2025.
• The drug aims to reduce GFAP production, targeting the underlying cause of AxD, which currently has no approved treatments.