Eisai and BioArctic AB (NASDAQ Stockholm: BIOA B) have secured approval from Hong Kong's Department of Health for Leqembi® (known locally as "樂意保®", generic name: lecanemab) to treat Alzheimer's disease (AD), marking its fifth global approval after the US, Japan, China, and South Korea. Leqembi is designated for patients with mild cognitive impairment (MCI) or mild dementia, consistent with its successful outcomes in the Phase 3 Clarity AD study.
In Hong Kong, where a significant proportion of the elderly population faces AD challenges, Leqembi's approval is based on its efficacy in targeting soluble and insoluble amyloid-beta (Aβ) aggregates in the brain, notably protofibrils and fibrils. This mechanism is pivotal in reducing Aβ plaques and thereby slowing cognitive decline, validated through rigorous clinical trials.
The collaboration between BioArctic and Eisai, stemming from BioArctic's discovery of the Arctic mutation in AD, has facilitated Leqembi's development. Eisai leads clinical development, regulatory submissions, and global commercialization efforts, with BioArctic entitled to milestone payments, sales royalties, and potential commercialization rights in the Nordic region, pending EU approval.
Eisai has also initiated applications for Leqembi in the EU and is exploring broader therapeutic applications through ongoing trials such as AHEAD 3-45 for preclinical AD and Tau NexGen for Dominantly Inherited AD. BioArctic, focusing on neurodegenerative diseases, expands beyond Leqembi with innovations like BrainTransporter™ to improve treatment efficacy, underscoring its commitment to advancing therapies for Alzheimer's, Parkinson's, and ALS.