Biogen/Ionis Scrap ALS Drug Development
Biogen and Ionis Pharmaceuticals say they are terminating the development of BIIB105 (ION541), an investigational antisense oligonucleotide for amyotrophic lateral sclerosis based on topline data from Phase 1/2 ALSpire study. The therapy was designed to reduce expression of ataxin-2 (ATXN2) protein and demonstrated statistically significant cerebrospinal fluid ATXN2 protein reductions in the study, according to the companies. “However, over the six-month placebo-controlled period, treatment with BIIB105 did not result in a reduction in levels of plasma neurofilament light chain (NfL), a marker of neurodegeneration and neuronal damage,” they say. “Additionally, BIIB105 did not demonstrate an impact on clinical outcome measures of function, breathing, and strength.”