第一财经·2025-08-02 06:33Core Viewpoint - Recent innovations in Alzheimer's disease drugs have shown promising results in clinical trials, particularly the long-term efficacy of therapies like donanemab, but concerns about long-term effects and safety remain [3][4]. Group 1: Clinical Trial Results - Eli Lilly's donanemab has demonstrated a significant slowing of disease progression in Alzheimer's patients over a three-year follow-up, with early treatment showing a 27% reduced risk of advancing to the next disease stage compared to delayed treatment [3][4]. - Over 75% of early-treated patients achieved amyloid clearance within 76 weeks, and the rate of amyloid plaque re-deposition was slow at approximately 2.4 CL/year during the longest observation period of 2.5 years [3][4]. Group 2: Safety and Side Effects - No new safety signals were observed during the long-term extension phase of the study, but previously noted issues related to amyloid-targeting treatments, such as ARIA (Amyloid-related imaging abnormalities), remain a concern [4]. - ARIA-related symptoms, including edema and bleeding, primarily occur within the first six months of treatment, and patients with the ApoE4 allele are at higher risk for these complications [4]. Group 3: Market Context and Patient Demographics - Donanemab was recently introduced in China, but the long-term efficacy in the Chinese patient population is yet to be validated due to the timing of its market entry [4][5]. - The earlier launched drug, lecanemab, has also shown a 34% reduction in cognitive decline over four years, with no new safety issues reported, although this data does not include Chinese patients [5]. - China has approximately 9.83 million Alzheimer's patients, with an estimated 20% being in the early stages of the disease, indicating a significant potential market for innovative treatments [5].