Memory Imaging of Normal Aging

January 22, 2009 updated by: National Institute on Aging (NIA)

BOLD and Perfusion fMRI of Alzheimer's Disease Risk

The purpose of this study is to develop imaging techniques that can distinguish functional brain changes in people at high risk for dementia years prior to onset of clinical memory problems from those with normal changes of aging.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Detailed Description

The overall goals of this project are to identify consistent patterns of variance in brain function in patients at risk for Alzheimer's Disease by using APOE ε4 as a marker for disease risk. The activation Blood Oxygen Level Dependency (BOLD) signal will be compared to both resting and activation perfusion signals to assess the variability of cerebral blood flow as it relates to the BOLD signal. Each participant will be imaged on a 3T MRI scanner while performing an associate episodic memory task.

A total of 90 individuals will be recruited for this study. Participants will be non-demented, right handed, adults with or without at least one APOE ε4 allele. Groups will be split as follows: A) ages 25-39: non-ε4 (n=15); B) ages 25-39: +ε4 (n=15); C) ages 40-49: non-ε4 (n=15); D) ages 40-49: +ε4 (n=15);.E) ages 50-65: non-ε4: F) ages 50-65: +ε4 (n=15). These groups will be matched for mean age, mean years of education, gender distribution, as well as the presence or absence of a family history of AD in a first degree relative.

There will be 2 scanning sessions for each participant. Scan session #1 and Scan session #2 will be acquired within 2 weeks of each other and will take approximately one hour each.

Study Type

Observational

Enrollment (Anticipated)

90

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • United States
    • California
      • La Jolla, California, United States, 92037
        • Shiley-Marcos Alzheimer's Disease Research Center, University of California, San Diego

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

25 years to 65 years (Adult, Older Adult)

Accepts Healthy Volunteers

Yes

Genders Eligible for Study

All

Sampling Method

Non-Probability Sample

Study Population

healthy adults from the community

Description

Inclusion Criteria:

  • Right-handed

Exclusion Criteria:

  • Major medical illnesses
  • History of significant head trauma with residual cognitive deficits
  • Other neurological or major psychiatric disorders such as schizophrenia, bipolar disorder, developmental learning disorder, and alcohol or substance abuse
  • MRI contra-indications

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

Cohorts and Interventions

Group / Cohort
Intervention / Treatment
1
Individuals with high risk for Alzheimer's disease
Procedure: BOLD and Perfusion brain MRI
Blood oxygenation and perfusion functional MRI performed twice, two weeks apart; each scan lasts 1 hour
2
Individuals with low risk for Alzheimer's disease
Procedure: BOLD and Perfusion brain MRI
Blood oxygenation and perfusion functional MRI performed twice, two weeks apart; each scan lasts 1 hour

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Time Frame
identification of consistent patterns of variance in brain function in subjects at risk for Alzheimer's Disease by using APOE ε4 as a marker for disease risk
Time Frame: single time point
single time point

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

National Institute on Aging (NIA)

Investigators

  • Principal Investigator: Adam Fleisher, MD, University of California, San Diego

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

August 1, 2005

Primary Completion (Actual)

July 1, 2008

Study Completion (Actual)

July 1, 2008

Study Registration Dates

First Submitted

April 14, 2006

First Submitted That Met QC Criteria

April 14, 2006

First Posted (Estimate)

April 18, 2006

Study Record Updates

Last Update Posted (Estimate)

January 26, 2009

Last Update Submitted That Met QC Criteria

January 22, 2009

Last Verified

January 1, 2009

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • IA0092
  • 5K23AG024062-02 (U.S. NIH Grant/Contract)

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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