2025 年 42 巻 3 号 p. 245-248
Alzheimer disease (AD) is the main cause of dementia worldwide. Extracellular deposition of amyloid β–protein (Aβ) in the brain is a primary event for the pathogenesis of patients with AD. Currently, the development of anti–Aβ monoclonal antibodies is at the center of AD treatment. This article discusses the therapeutic efficacy of lecanemab, which is a pioneer of anti–Aβ monoclonal antibody medication, based on the Aβ cascade hypothesis.