BioArctic AB’s (publ) (NASDAQ Stockholm: BIOA B) partner Eisai has presented the latest findings for lecanemab (Leqembi®) at the Clinical Trials on Alzheimer’s Disease, CTAD, congress, held in Madrid, Spain, and virtually, October 29 to November 1. Three-year data show that lecanemab continues to give increased patient benefit for patients with early Alzheimer’s disease, expanding approximately 1 point on CDR-SB compared to the ADNI[1]-population, with maintained safety profile. In addition, data show that 46% of patients who had low levels of brain amyloid at the start of treatment have improved or maintained cognition and function after three years of treatment.
Results from the open-label long-term extension study (OLE) following the core study of the lecanemab phase 3 Clarity AD study presented at AAIC in July, showed that the mean change from baseline in CDR-SB (global cognitive and functional scale) in the lecanemab treated group was -0.45 at 18 months compared to the placebo group. This had expanded to -0.95 compared to the ADNI-population at 36 months. The data also showed a 30% reduction in the risk of progressing to the next disease stage. Furthermore, the tau PET substudy of Clarity AD showed that with three years of continuous treatment with lecanemab, 59% of patients with no or low tau accumulation in the brain (no tau/low tau) at baseline showed improvement or no decline, and 51% showed improvement from baseline on the Clinical Dementia Rating-Sum of Boxes (CDR-SB) global cognitive and functional scale.
