Biogen/Eisai Scrap Phase 3 Alzheimer’s Trials

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Biogen and Eisai have discontinued global Phase 3 trials, ENGAGE and EMERGE, designed to evaluate the efficacy and safety of aducanumab in patients with mild cognitive impairment due to Alzheimer’s disease and mild Alzheimer’s disease dementia. Their decision is based on a futility analysis conducted by an independent data monitoring committee, which indicated the trials were unlikely to meet their primary endpoint upon completion. The recommendation to stop the studies was not based on any safety concerns, they say. Detailed data from the studies will be presented at future medical meetings.

 

The studies’ primary endpoint was an evaluation of the efficacy of monthly doses of aducanumab as compared with placebo in slowing cognitive and functional impairment as measured by changes in the Clinical Dementia Rating-Sum of Boxes score. The companies describe aducanumab as a human monoclonal antibody derived from a de-identified library of B cells collected from healthy elderly subjects with no signs of cognitive impairment or cognitively impaired elderly subjects with unusually slow cognitive decline using Neurimmune’s technology platform called Reverse Translational Medicine.

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