Evaluation of [123I] AV83 and SPECT in Patients With Alzheimer Disease in Comparison to Healthy Controls

Evaluation of [123I] AV83 and SPECT as a Marker of Beta-Amyloid Protein Deposition in Subjects With Alzheimer Disease in Comparison to Healthy Subjects

The underlying goal of this study is to assess 123-I AV83 SPECT imaging as a tool to detect ß-amyloid deposition in the brain of AD research participants and age- and gender-matched healthy subjects.

Study Overview

• Status: Completed
• Conditions: Alzheimers Disease
• Intervention / Treatment: Radiation: [123-I] AV-83 Injection and Imaging Procedures

Detailed Description

Approximately 20 patients with Alzheimer's disease (AD) and 10 healthy controls will be recruited to participate in this study. Healthy controls will be examined to ensure that there is no evidence of neurodegenerative changes including cognitive decline.

All subjects will undergo written informed consent and a screening evaluation including baseline clinical laboratory testing, a baseline physical and neurological evaluation and baseline cognitive evaluations.

Subjects will be asked to undergo a bolus injection of 123-I AV83. Subjects will undergo serial SPECT imaging scans and serial venous plasma sampling for measurement of 123-I AV83 in plasma (both protein bound and free) over a period of up to 6 hours.

Subjects may be asked to undergo a second imaging visit between 2 and 6 weeks following the initial imaging visit following similar procedures to the initial imaging visit to evaluate the reproducibility of the imaging measure using this procedure. The imaging analyses will be performed by an image-processing specialist who will remain masked to the procedures employed with each imaging acquisition.

The primary imaging outcome measure will be the brain regional distribution volumes expressed as a brain tissue to plasma ratio of the radioligand, 123-I AV83. Time to the peak uptake and amplitude of the peak uptake will be evaluated for all brain regions and the results for the AD patients and controls will be compared.

For those subjects undergoing repeat imaging visits, the data from the initial scan will be compared to the second scan to determine which offers the reproducibility of the imaging outcome measure.

• Study Type: Interventional
• Enrollment (Anticipated): 30
• Phase: Phase 1

Contacts and Locations

Study Locations

• United States
  • Connecticut
    • New Haven, Connecticut, United States, 06510
      • Molecular NeuroImaging

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 50 years and older (Adult, Older Adult)
• Accepts Healthy Volunteers: Yes
• Genders Eligible for Study: All

Description

Inclusion Criteria:

• The participant is 50 years or older.
• Written informed consent is obtained.
• Participants have a clinical diagnosis of Alzheimer's disease based on National Institute of Neurological and Communicative Disorders and Stroke/Alzheimer's Disease and Related Disorders Association (NINCDS/ADRDA) criteria.
• Mini-Mental Status Exam score < 25.
• Modified Hachinski Ischemia Scale score of ≤ 4.
• Geriatric Depression Scales (GDS) ≤ 10.
• For females, non-child bearing potential or negative urine or blood pregnancy test on day of 123-I AV39 injection.

Exclusion Criteria:

• The subject has signs or symptoms of another neurodegenerative disease including Parkinson's disease, diffuse Lewy body dementia, or history of significant cerebrovascular disease.
• The subject has a clinically significant abnormal laboratory value and/or clinically significant unstable medical or psychiatric illness
• The subject has any disorder that may interfere with drug absorption distribution, metabolism, or excretion (including gastrointestinal surgery).
• The subject has evidence of clinically significant gastrointestinal, cardiovascular, hepatic, renal, hematological, neoplastic, endocrine, neurological, immunodeficiency, pulmonary, or other disorder or disease.
• Pregnancy

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Diagnostic
• Allocation: Non-Randomized
• Interventional Model: Single Group Assignment
• Masking: None (Open Label)

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Time Frame
Assess the dynamic uptake and washout of 123-I AV83	one year

Secondary Outcome Measures

Outcome Measure	Time Frame
Blood metabolite characterization of 123-I AV39 in healthy and AD subjects to determine the metabolic fate and nature of metabolites	one year
Evaluate the test/retest reproducibility of 123-IAv83 and SPECT in AD subjects and healthy controls.	one year

Collaborators and Investigators

• Sponsor: Molecular NeuroImaging
• Collaborators: Institute for Neurodegenerative Disorders

Study record dates

Study Major Dates

• Study Start: March 1, 2007
• Primary Completion (Actual): March 1, 2008
• Study Completion (Actual): March 1, 2008

Study Registration Dates

• First Submitted: March 16, 2007
• First Submitted That Met QC Criteria: March 16, 2007
• First Posted (Estimate): March 19, 2007

Study Record Updates

• Last Update Posted (Estimate): May 13, 2008
• Last Update Submitted That Met QC Criteria: May 9, 2008
• Last Verified: May 1, 2008

More Information

Terms related to this study

• Keywords: neurological; alzheimers
• Additional Relevant MeSH Terms: Mental Disorders; Brain Diseases; Central Nervous System Diseases; Nervous System Diseases; Neurocognitive Disorders; Neurodegenerative Diseases; Dementia; Tauopathies; Alzheimer Disease
• Other Study ID Numbers: AV-83 001; 07-033