Phase III Study of the Correlation Between Florbetapir F18 PET Imaging and Amyloid Pathology in the Brain

This study has been completed.
Sponsor:
Information provided by (Responsible Party):
Avid Radiopharmaceuticals
ClinicalTrials.gov Identifier:
NCT00857415
First received: March 5, 2009
Last updated: May 17, 2012
Last verified: May 2012
  Purpose

The study is designed to test the relationship between measurements of brain amyloid using florbetapir F 18 PET imaging and true levels of amyloid by dissection of the brain at autopsy. Amyloid in the brain is a key feature of Alzheimer's Disease (AD).


Condition Intervention Phase
Alzheimer's Disease
Drug: florbetapir F 18
Phase 3

Study Type: Interventional
Study Design: Allocation: Non-Randomized
Endpoint Classification: Safety/Efficacy Study
Intervention Model: Single Group Assignment
Masking: Single Blind (Outcomes Assessor)
Primary Purpose: Diagnostic
Official Title: A Phase III Study of the Correlation Between Florbetapir F 18 (18F-AV-45) PET Imaging and Amyloid Pathology

Resource links provided by NLM:


Further study details as provided by Avid Radiopharmaceuticals:

Primary Outcome Measures:
  • Correlation of Florbetapir-PET Image and Amyloid Plaque Density [ Time Frame: at autopsy up to 12 months post-scan ] [ Designated as safety issue: No ]
    Spearman's rank order correlation of the median semi-quantitative visual read of the florbetapir-PET image and the amyloid plaque density assessed post-mortem by quantitative immunohistochemistry (IHC) averaged across 6 brain regions (precuneus, parietal cortex, frontal cortex, temporal cortex, posterior cingulate, anterior cingulate). Spearman's rank order correlation ranges from -1 to +1. A value of -1 indicates perfect negative correlation, and a value of +1 indicates a perfect positive correlation.

  • Specificity Analysis [ Time Frame: 50-60 min after injection ] [ Designated as safety issue: No ]
    Specificity of florbetapir-PET scan in younger healthy controls presumed to be negative for amyloid. Specificity results are reported as the number of subjects who had a negative scan based on majority of 3 blinded readers.


Secondary Outcome Measures:
  • Regional Correlation Analysis [ Time Frame: at autopsy up to 12 months post-scan ] [ Designated as safety issue: No ]
    Spearman's rank order correlation of median visual read of the florbetapir-PET image vs. amyloid plaque density assessed post-mortem by quantitative IHC of six individual brain regions (precuneus, parietal cortex, frontal cortex, temporal cortex, posterior cingulate, anterior cingulate). Spearman's rank order correlation ranges from -1 to +1. A value of -1 indicates perfect negative correlation, and a value of +1 indicates a perfect positive correlation.


Enrollment: 226
Study Start Date: December 2008
Study Completion Date: May 2010
Primary Completion Date: March 2010 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: Autopsy Cohort
End-of-life subjects (life expectancy < 6 months) consenting to brain donation at autopsy.
Drug: florbetapir F 18
Single i.v. bolus injection of 370MBq (10 mCi) followed by saline flush, 50 minutes prior to imaging, 10 minute image duration
Other Names:
  • 18F-AV-45
  • florbetapir F 18
  • AV-45
  • Amyvid
Experimental: Specificity Cohort
Younger healthy controls presumed to be devoid of beta-amyloid plaques.
Drug: florbetapir F 18
Single i.v. bolus injection of 370MBq (10 mCi) followed by saline flush, 50 minutes prior to imaging, 10 minute image duration
Other Names:
  • 18F-AV-45
  • florbetapir F 18
  • AV-45
  • Amyvid

Detailed Description:

There will be two primary analyses:

  • The first primary analysis will evaluate the correlation between the blinded readers' rating of amyloid plaque density on the PET scan and the cortical amyloid plaque density at autopsy.
  • The second primary analysis will evaluate the specificity of the blinded readers' rating of presence or absence of amyloid plaque density on the PET scan

For the autopsy population, subjects will be enrolled from various end-of-life (e.g. hospice / hospital / nursing home) and late-life (longitudinal studies of aging) populations. Enrollment will include subjects with various levels of cognitive status, ranging from cognitively normal through dementia. It is expected that amyloid plaque density in this elderly population will range from very low (normal aging) through moderate (e.g. cognitively normal subjects with asymptomatic amyloid deposits or mild cognitive impairment (MCI) subjects with intermediate levels of amyloid deposits) to very high (subjects with AD). The study will also enroll younger healthy subjects presumably devoid of amyloid in the specificity cohort.

Screening assessments may take place over several days and will include collection of demographic information, diagnostic interview, and safety assessments. At the time of screening, subjects or caregivers will be asked to provide consent for brain donation if they are not already enrolled in a brain donation program affiliated with this study, in addition to providing informed consent for the screening and imaging procedures in the study.

Subjects who qualify for the study will have a catheter placed for intravenous (i.v.) administration of florbetapir F 18. Subjects will receive a single i.v. bolus of 370 MBq (10 mCi) of florbetapir F 18 followed by brain PET imaging for 10 minutes duration, beginning approximately 50 minutes post-injection. Vital signs and safety labs will be obtained prior to the administration of florbetapir F 18 and at the completion of the imaging session. Adverse events will be continuously monitored during the imaging session. Subjects who experience an adverse event will not be discharged until the event has been resolved or stabilized.

  Eligibility

Ages Eligible for Study:   18 Years and older
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   Yes
Criteria

Inclusion Criteria (autopsy cohort):

  • Have a projected life expectancy of ≤ 6 months as determined by the principal investigator (e.g. terminal medical condition) or are already enrolled in a longitudinal study of aging with an autopsy component;
  • Can tolerate a 10 minute PET scan; and
  • Give informed consent for study procedures and brain donation consistent with the legal requirements of the State in which they are enrolled and the State in which they die.

Inclusion Criteria (specificity cohort):

  • Cognitively and neurologically healthy males and females 18 to 40 years of age;
  • Who had no known risk factors for AD, including:
  • Known genetic risk factors for AD, including an ApoE ε4 allele (note: ApoE genotype was determined after enrollment and was not disclosed to healthy control subjects). Scans from subjects carrying an ApoE ε4 allele were not included in the primary specificity analysis, but were included in an exploratory analysis;
  • First degree relative with a known progressive dementing disorder;
  • History of cognitive decline;
  • History of neurologic, neurodegenerative, or psychiatric disease;
  • History of head trauma; or
  • Evidence of brain abnormality on a MRI scan;
  • Who performed in an age-appropriate normal range on the Wechsler Logical Memory I & II, story A;
  • Who could tolerate a 10-minute PET scan; and
  • Who provided informed consent before any study procedures were performed.

Exclusion Criteria:

  • Have primary brain tumor, known metastases to the brain, central nervous system (CNS) lymphoma;
  • Have any major, focal structural loss of brain matter;
  • Are aggressively being treated with life sustaining measures (e.g. currently on respirator; receiving high dose chemotherapy);
  • Have a clinically significant infectious disease, including Acquired Immune Deficiency Syndrome (AIDS), Human Immunodeficiency Virus (HIV) infection, previous positive test for hepatitis or HIV or Creutzfeldt-Jakob disease (CJD);
  • Are receiving any investigational medications, or have participated in a trial with investigational medications within the last 30 days;
  • Have ever participated in an experimental study with an amyloid targeting agent (e.g. anti-amyloid immunotherapy, secretase inhibitor);
  • Have had a radiopharmaceutical imaging or treatment procedure within 7 days prior to the study imaging session; or
  • Are females of childbearing potential who are pregnant or not using adequate contraception.
  Contacts and Locations
Please refer to this study by its ClinicalTrials.gov identifier: NCT00857415

  Show 25 Study Locations
Sponsors and Collaborators
Avid Radiopharmaceuticals
Investigators
Study Director: Chief Medical Officer Avid Radiopharmaceuticals
  More Information

Publications:
Responsible Party: Avid Radiopharmaceuticals
ClinicalTrials.gov Identifier: NCT00857415     History of Changes
Other Study ID Numbers: 18F-AV-45-A07
Study First Received: March 5, 2009
Results First Received: April 6, 2012
Last Updated: May 17, 2012
Health Authority: United States: Food and Drug Administration

Keywords provided by Avid Radiopharmaceuticals:
florbetapir F 18 PET
amyloid imaging
Amyloid pathology in the brain

Additional relevant MeSH terms:
Alzheimer Disease
Dementia
Brain Diseases
Central Nervous System Diseases
Nervous System Diseases
Tauopathies
Neurodegenerative Diseases
Delirium, Dementia, Amnestic, Cognitive Disorders
Mental Disorders

ClinicalTrials.gov processed this record on April 17, 2014