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Background: Lecanemab is a humanized IgG1 monoclonal antibody that binds with high affinity to Aβ soluble protofibrils. In two clinical studies (phase 2, NCT01767311 and phase 3 ClarityAD, NCT03887455) in early Alzheimer's disease, lecanemab substantially reduced amyloid PET and significantly slowed clinical decline on multiple measures of cognition and function, including CDR-SB at 18 months. Models describing the change in amyloid PET and CDR-SB in response to lecanemab treatment were used to explore the impact of changing from the initial dosage regimen (10 mg/kg every 2 weeks [Q2W]) to a less intensive maintenance dosing regimen (10 mg/kg every 4 weeks [Q4W]) on clinical efficacy, and to explore the optimal duration of the initial dosing regimen.
View Article and Find Full Text PDFBackground: Senile dementia (SD) is a deteriorative organic brain disorder and it comprises Alzheimer's disease (AD) as a major variant. SD is shown impairment of mental capacities whereas AD is degeneration of neurons. According to World Health Organization (WHO) report; more than 55 million peoples have dementia and it is raising 10 million new cases every year.
View Article and Find Full Text PDFDrug Development.
Alzheimers Dement
December 2024
Karolinska Institute, Stockholm, Södermanland and Uppland, Sweden.
Background: Novel anti-amyloid therapies (AAT) for Alzheimer's Disease (AD) have recently been approved in the United States, Japan and China, and are under regulatory review in Europe. Questions remain regarding the long-term effectiveness and value of these drugs when used in routine clinical practice. Data from follow-up studies will be important to inform their optimal use, including criteria for treatment initiation, monitoring strategies, stopping rules, pricing and reimbursement considerations.
View Article and Find Full Text PDFDrug Development.
Alzheimers Dement
December 2024
NYU Grossman School of Medicine, New York, NY, USA; NYU, New York City, NY, USA.
Background: Astrocytes, a major glial cell in the central nervous system (CNS), can become reactive in response to inflammation or injury, and release toxic factors that kill specific subtypes of neurons. Over the past several decades, many groups report that reactive astrocytes are present in the brains of patients with Alzheimer's disease, as well as several other neurodegenerative diseases. In addition, reactive astrocyte sub-types most associated with these diseases are now reported to be present during CNS cancers of several types.
View Article and Find Full Text PDFBackground: Convergent evidence indicates that deficits in the endosomal recycling pathway underlies pathogenesis of Alzheimer's disease (AD). SORL1 encodes the retromer-associated receptor SORLA that plays an essential role in recycling of AD-associated cargos such as the amyloid precursor protein and the glutamatergic AMPA receptor. Importantly, loss of function pathogenic SORL1 variants are associated with AD.
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