Ulefnersen ulefnersen PHASE3
Drug Profile
ModalityAntisense oligonucleotide
RouteINTRATHECAL
Therapy AreaNeurology
Peak Sales Est$500M
Formulations[]
Companies
4578 (LICENSEE)100%
IONS (ORIGINATOR)0%
Mechanism: Antisense Oligonucleotide (FUS)
Expert: Antisense oligonucleotide (ASO) targeting FUS (Fused in Sarcoma) pre-mRNA. Reduces expression of toxic gain-of-function mutant FUS protein in motor neurons. Designed for ALS patients with pathogenic FUS mutations (~3% of familial ALS cases).
Everyday: A genetic medicine that targets the FUS gene — which, when mutated, causes a specific type of ALS (motor neuron disease). It tells the cell to produce less of the toxic mutant FUS protein that kills nerve cells.
Targets: []
Programs (1)
IndicationStageKey StudyRegional Status
FUS-ALSPHASE3FUSION (NCT04768972)[]
Upcoming Catalysts (1)
Ulefnersen - FUS-ALS - Ph3 - Topline (FUSION) H2 2026
Notes
Ionis-partnered ASO for FUS-ALS. FUSION trial enrollment complete. Primary completion H2 2026.
Data from Supabase · Updated 2026-03-24