NCT02031198

18-months Safety Follow-up Study of AADvac1, an Active Tau Vaccine for Alzheimer's Disease

An 18-months Open Label Phase I Follow-up Study on Patients With Alzheimer's Disease Who Have Completed the AADvac1 Phase I Study "AXON CO 18700"

• Status: Completed
• Phase: Phase 1
• Study type: Interventional
• Enrollment: 25 (actual)
• Sponsor: Axon Neuroscience SE · Industry
• Sex: All
• Age: 50 Years – 86 Years
• Healthy volunteers: Not accepted

Summary

This follow-up study continues to observe patients who have completed the phase 1 trial of AADvac1, for another 18 months. Long-term safety and behavior of the immune response to AADvac1 over time are the main points of interest. AADvac1 is a vaccine directed against pathologically modified Alzheimer tau protein that is the main constituent of neurofibrillary tangles (NFTs), and is intended to be a disease-modifying treatment for Alzheimer's disease, i.e. to halt its progress. As this study is a Phase I study focused on tolerability and safety, efficacy will be assessed in an exploratory manner.

Detailed description

AADvac1 is a candidate therapeutic vaccine for Alzheimer's disease that targets misfolded tau protein, a common denominator of neurofibrillary pathology. Based on preclinical results, the intervention is expected to reduce the number of neurofibrillary tangles, remove hyperphosphorylated tau protein and reduce the amount of oligomerized and insoluble pathological tau in the brain, to halt the spread of neurofibrillary pathology through the brain, and thus prevent associated cognitive decline. The vaccine's antigenic determinant is a synthetic peptide derived from a tau protein sequence, which is coupled to keyhole limpet hemocyanin (KLH) and uses aluminum hydroxide (Alhydrogel) as an adjuvant. At present AADvac1 is intended as an active immunotherapy for patients with diagnosed Alzheimer's disease (AD). According to need, patients will receive additional immunization doses beyond those administered in the preceding pase 1 trial; the raised titers of therapeutic antibodies and possible benefits of the treatment can extend beyond the duration of the study. Because of the central role of pathological misfolded tau protein in the etiology of AD, the vaccine is expected to be more effective than active or passive immunotherapies aiming to eliminate the amyloid β plaques that have been clinically investigated so far.

Conditions

• Alzheimer's Disease

Interventions

Type	Name	Description
DRUG	AADvac1	Active immunization against pathological Alzheimer's disease tau protein

Timeline

• Start date: 2014-01-01
• Primary completion: 2016-08-01
• Completion: 2016-12-01
• First posted: 2014-01-09
• Last updated: 2017-03-17

Locations

4 sites across 1 country: Austria