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Practice Effects and Amyloid Imaging Using 18F-PIB or Flutemetamol PET and FDG-PET

NCT01202994 · Status: COMPLETED · Phase: PHASE2 · Type: INTERVENTIONAL · Enrollment: 27

Last updated 2023-05-09

Study results available
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Summary

Alzheimer's disease (AD) is the most common cause of progressive cognitive decline in the United States. AD is characterized by severe impairments in learning, memory and other cognitive abilities that significantly interfere with daily functioning. The neuropathologic hallmarks of AD consist of neuritic plaques, neurofibrillary tangles, and selective neuronal cell loss. Amyloid plaques, which contain Abeta protein, are believed to play an integral role in the development of AD. Elevated levels of Abeta in the brain are also correlated with cognitive decline.

Alzheimer's (AD) develops insidiously, making it difficult to identify early, yet treatment is most effective when begun during the early stages of the disease. Thus, it has become important for researchers to identify markers of early AD. This project will examine the relationship between four potential markers that may indicate the early development of AD:

1. Mild cognitive impairment (MCI)or normal cognition
2. Practice effects
3. Amyloid plaque binding on 18F-PIB PET
4. Glucose hypometabolism on FDG PET

This project will recruit 25 subjects from an ongoing community-based study of memory and practice effects in cognitively normal, community-dwelling individuals who are age 65 and over (NIA #5K23AG028417-05). Each subject will undergo positron emission tomography (PET) with both 18F-Flutemetamol and FDG.

The overall objective of this companion project is to study the biodistribution and binding of 18F-Flutemetamol in these subjects using PET imaging, which will provide biological evidence to support the overall hypothesis that failure to benefit from practice on a learning paradigm is an early marker of AD.

Conditions

Interventions

DRUG

18F-Flutemetamol

All subjects will undergo a PET scan with 18F-PIB, within six months of also undergoing an FDG-PET scan (PET scans will occur on separate days). For the 18F-PIB PET scan: Approximately 185 MBq (5 mCi) of 18F-PIB will be injected intravenously and PET data collected for each subject. The FDG-PET scan will follow the same procedures as routine scans obtained in a clinical setting (approximately 370 MBq of 18F-FDG will be injected intravenously and PET data collected for each subject). FDG-PET data will be used to correlate metabolic changes and for anatomic co-registration of 18F-PIB images.

Sponsors & Collaborators

Principal Investigators

  • Kevin Duff, Ph.D. · University of Utah

Study Design

Allocation
NA
Purpose
SCREENING
Masking
NONE
Model
SINGLE_GROUP

Eligibility

Min Age
65 Years
Sex
ALL
Healthy Volunteers
Yes

Timeline & Regulatory

Start
2011-05-31
Primary Completion
2016-05-31
Completion
2020-10-14

Countries

  • United States

Study Locations

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Diseases
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Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT01202994 on ClinicalTrials.gov