ADvance DBS-f in Patients With Mild Probable Alzheimer's Disease
- Conditions
- Alzheimer Disease
- Interventions
- Device: DBS-f offDevice: DBS-f on
- Registration Number
- NCT01608061
- Lead Sponsor
- Functional Neuromodulation Ltd
- Brief Summary
The primary objective of this feasibility study is to evaluate the safety of DBS-f in patients with mild Alzheimer's disease by assessing all device and/or therapy related adverse events. The secondary objective is to preliminarily estimate the treatment effect size on the outcomes of interest at 12 months post-randomization. The objectives do not involve formal tests of hypotheses.
- Detailed Description
Not available
Recruitment & Eligibility
- Status
- COMPLETED
- Sex
- All
- Target Recruitment
- 42
- 45-85 years of age (inclusive)
- Probable Alzheimer's disease according to the National Institute of Aging Alzheimer's disease Association criteria.
- Must meet certain criteria on cognitive and behavioral rating scales
- If female, subjects who are post-menopausal or surgically sterile or willing to use birth control methods for the duration of the study.
- An available caregiver willing to participate.
- Subject is living at home and likely to remain at home for the study duration.
- The subject is currently taking a stable dose of cholinesterase inhibitor (AChEI) medication for at least 60 days
- Must meet certain criteria on cognitive and behavioral rating scales
- Current major psychiatric disorder such as schizophrenia, bipolar disorder or major depressive disorder based on psychiatric consult at screening visit
- History of head trauma in the 2 years prior to signing the consent to participate in the study
- History of brain tumor, subdural hematoma, or other clinically significant (in the judgment of the investigator) space-occupying lesion on CT or MRI
- Active psychiatric disorder
- Mental retardation
- Current alcohol or substance abuse as defined by Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition, Text Revision (DSM-IV-TR)
- Contraindications for PET scanning (e.g., insulin dependent diabetes)
- Contraindications for MRI scanning, including implanted metallic devices (e.g. non-MRI-safe cardiac pacemaker or neurostimulator; some artificial joints metal pins; surgical clips; or other implanted metal parts), or claustrophobia or discomfort in confined spaces.
- Abnormal lab results that, in the opinion of the investigator and/or enrollment review committee, would preclude participation in the study.
- Abnormal cardiovascular or neurovascular disorder that, in the opinion of the investigator and/or enrollment review committee, would preclude participation in the study.
- Unstable doses of any medication prescribed for the treatment of memory loss or Alzheimer's disease.
- Currently prescribed any non-AD medications that, in the opinion of the investigator and/or enrollment review committee, would preclude participation in the study.
- Is unable or unwilling to comply with protocol follow-up requirements.
- Has a life expectancy of < 1 year.
- Is actively enrolled in another concurrent clinical trial.
Study & Design
- Study Type
- INTERVENTIONAL
- Study Design
- PARALLEL
- Arm && Interventions
Group Intervention Description DBS-f off DBS-f off DBS-f off DBS-f on DBS-f on DBS-f on
- Primary Outcome Measures
Name Time Method Acute Safety 30 days post implant Acute safety will be assessed by estimating the rate of serious device (pulse generator or lead) or procedure related adverse events from the date of implant through the date of randomization, plus serious procedure related events through 30 days post-implant. All subjects undergoing an implant procedure will be included in these rate estimates. The rate and 95% confidence interval will be presented. Analysis is of a timepoint prior to randomization and thus all subjects are analyzed together.
Long Term Safety. Not Based on Formal Hypotheses. 12 month Long-term safety will be assessed by the rate of serious device or therapy related adverse events from the date of randomization through the date of the Month 12 visit. The rate and 95% confidence interval will be presented by randomization group. All subjects randomized will be included.
- Secondary Outcome Measures
Name Time Method ADAS-Cog 13 Baseline and 12 months The mean change from baseline (pre-implant) to 12 months will be calculated in each treatment group. The differences between randomized groups in mean change will be calculated, along with corresponding 2-sided, 95% confidence intervals.
Instrument is Alzheimer's Disease Assessment Scale - Cognitive subscale. Scores range from 0 to 85 with higher scores meaning worse outcome.CDR-SB Baseline and 12 months The mean change from baseline (pre-implant) to 12 months will be calculated in each treatment group. The differences between randomized groups in mean change will be calculated, along with corresponding 2-sided, 95% confidence intervals.
The scale used is the Clinical Dementia Rating Scale and the score used is the sum of boxes. The scores for this measure range from 0 to 18 with a higher score indicating a worse outcome.
Trial Locations
- Locations (7)
Banner Alzheimer's Institute
🇺🇸Phoenix, Arizona, United States
Banner Research Institute at Sun City
🇺🇸Sun City, Arizona, United States
University of Florida at Gainesville
🇺🇸Gainesville, Florida, United States
Johns Hopkins Bayview
🇺🇸Baltimore, Maryland, United States
Hospital of the University of Pennsylvania: Penn Memory Clinic
🇺🇸Philadelphia, Pennsylvania, United States
Toronto Western Hospital
🇨🇦Toronto, Ontario, Canada
Brown University
🇺🇸Providence, Rhode Island, United States