- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT03016702
The Cognitive Resilience Study (CogRes)
August 11, 2017 updated by: Duke University
The Cognitive Resilience Study: Stress Tests for Alzheimer's Disease
The purpose of this study is to test whether two new cognitive "stress tests" may help distinguish between people at lower or higher genetic risk of Alzheimer's Disease.
The investigators are trying to understand how these cognitive "stress tests" work in people who have not been diagnosed with Alzheimer's Disease and are not exhibiting symptoms of Alzheimer's Disease.
Study subjects will undergo testing of memory and executive function during functional magnetic resonance image (fMRI) of the brain and also during a walking test.
Study Overview
Status
Completed
Conditions
Intervention / Treatment
Detailed Description
The objective is to establish the feasibility and evaluate the role of two novel tests of cognitive resilience for use in identification of early Alzheimer's Disease.
The investigators hypothesize that exposure to the controlled stressor of increased cognitive task demand will evoke measurable phenotypes of poor resilience, which will be associated with Alzheimer's Disease risk.
The study will include 30 volunteer participants from the Duke Alzheimer's Disease Prevention Registry (ADPR).
The ADPR cohort has been characterized according to genetic risk based on genotype at loci associated with Alzheimer's Disease.
The investigators will recruit a sample from the ADPR that includes 15 people in the "genetic high risk" group and 15 people, matched by age, in the "genetic low risk" group.
Investigators and experimenters are masked to the genetic profile of all participants.
All participants will undergo two cognitive stress test protocols.
Both protocols include memory and executive function components, one done during functional MRI and one while ambulating on a force sensor mat.
Both cognitive stress tests are minimal risk; the primary risk of this study is loss of confidentiality.
Genetic testing is not performed as part of this protocol; the sampling strategy will make use of prior genetic testing results, which are not revealed to the primary investigators.
In addition to determining whether scores on the two novel tests statistically differ by AD risk groups, the project will establish the tests' feasibility and characteristics for use in future study.
Study Type
Interventional
Enrollment (Actual)
29
Phase
- Not Applicable
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
-
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North Carolina
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Durham, North Carolina, United States, 27710
- Duke University Medical Center
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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
58 years to 70 years (ADULT, OLDER_ADULT)
Accepts Healthy Volunteers
No
Genders Eligible for Study
All
Description
Inclusion Criteria:
- Able to walk 2 minutes without assistive device or assistance from another person
- Cognitive function within normal limits
Exclusion Criteria:
- Unable to undergo MRI
- Left handed
- Red/Green Color Blind
- Severe vision impairments
- Diagnosis of Alzheimer's Disease or other dementia/memory problem
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
- Primary Purpose: DIAGNOSTIC
- Allocation: NON_RANDOMIZED
- Interventional Model: PARALLEL
- Masking: TRIPLE
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
EXPERIMENTAL: High Risk Alzheimer's Disease
This group includes subjects with APOEe4 homozygotes, the genetic profile associated with the highest risk for late-onset AD and the next highest-risk group, APOE e3/e4 heterozygotes.
To target the highest risk among the APOEe3/e4 heterozygotes in ADPR, the study team will consider TOMM40-'523 variant status.
Although there is uncertainty about the independent role of TOMM40 in AD risk-stratification (especially across racial/ethnic groups), this study will use TOMM40-'523 to guide heterozygote selection based on findings that among e3/e4 heterozygotes, longer TOMM40-523 polyT sequences are associated with earlier age of onset for late-onset AD.
|
Subjects will undergo progressively more complex cognitive stress tests that assess memory and executive function while undergoing fMRI.
Subjects will undergo progressively more complex cognitive stress tests that assess memory and executive function both in sitting and while ambulating on a force sensor mat.
|
EXPERIMENTAL: Low Risk Alzheimer Disease
This group includes e2/e2 homozygotes (rare) and e2/e3 heterozygotes. the genetic profile associated with low risk for late-onset development of Alzheimer's disease.
|
Subjects will undergo progressively more complex cognitive stress tests that assess memory and executive function while undergoing fMRI.
Subjects will undergo progressively more complex cognitive stress tests that assess memory and executive function both in sitting and while ambulating on a force sensor mat.
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Change in reaction time during memory testing during fMRI
Time Frame: Measured immediately during one hour fMRI
|
The primary dependent variable will be change in reaction time when comparing a neutral memory task to a stress condition.
Reaction time will be in ms and will be recorded while the subject is undergoing fMRI.
|
Measured immediately during one hour fMRI
|
Change in reaction time during executive function testing during fMRI
Time Frame: Measured immediately during one hour fMRI
|
The primary dependent variable will be change in reaction time when comparing a neutral executive function task to a stress condition.
Reaction time will be in ms and will be recorded while the subject is undergoing fMRI.
|
Measured immediately during one hour fMRI
|
Change in accuracy during memory testing during gait task
Time Frame: Measured immediately during one hour gait session
|
The primary dependent variable will be DTEcog = (Dual task [cognitive score] - Single Task [cognitive score] / Single task [cognitive score].
For the memory task, the primary cognitive measure will be the number of correct responses.
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Measured immediately during one hour gait session
|
Change in reaction time during executive function testing during gait task
Time Frame: Measured immediately during one hour gait session
|
The primary dependent variable will be DTEcog = (Dual task [cognitive score] - Single Task [cognitive score] / Single task [cognitive score].
For the executive task, the primary cognitive measure in the DTEcog calculation will be reaction time.
|
Measured immediately during one hour gait session
|
Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Change in accuracy during memory testing during fMRI
Time Frame: Measured immediately during one hour fMRI
|
Secondary dependent variables are accuracy (% correct) when comparing a neutral memory task to a stress condition.
|
Measured immediately during one hour fMRI
|
Change in accuracy during executive function testing during fMRI
Time Frame: Measured immediately during one hour fMRI
|
Secondary dependent variables are accuracy (% correct) when comparing a neutral memory task to a stress condition.
|
Measured immediately during one hour fMRI
|
Brain activation during memory testing during fMRI
Time Frame: Measured immediately during one hour fMRI
|
Group differences in brain activation provoked by the memory stress condition will be assessed using brain maps that compare block-average BOLD signal for resting vs neutral task, resting vs stress task, neutral vs stress task.
|
Measured immediately during one hour fMRI
|
Brain activation during executive function testing during fMRI
Time Frame: Measured immediately during one hour fMRI
|
Group differences in brain activation provoked by the executive function stress condition will be assessed using brain maps that compare block-average BOLD signal for resting vs neutral task, resting vs stress task, neutral vs stress task.
|
Measured immediately during one hour fMRI
|
Change in gait performance provoked by memory dual tasking
Time Frame: Measured immediately during one hour gait session
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The secondary dependent variable will be DTEmob = (Dual task[mobility score] - Single Task[mobility score] / Single task [mobility score].
For both memory and executive tasks, the mobility measure in the DTEmob calculation will be gait speed.
|
Measured immediately during one hour gait session
|
Change in gait performance provoked by executive function dual tasking
Time Frame: Measured immediately during one hour gait session
|
The secondary dependent variable will be DTEmob = (Dual task[mobility score] - Single Task[mobility score] / Single task [mobility score].
For both memory and executive tasks, the mobility measure in the DTEmob calculation will be gait speed.
|
Measured immediately during one hour gait session
|
Collaborators and Investigators
This is where you will find people and organizations involved with this study.
Sponsor
Collaborators
Investigators
- Principal Investigator: Heather Whitson, MD, MHS, Duke University Aging Center
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 (ACTUAL)
February 27, 2017
Primary Completion (ACTUAL)
August 9, 2017
Study Completion (ACTUAL)
August 9, 2017
Study Registration Dates
First Submitted
January 9, 2017
First Submitted That Met QC Criteria
January 9, 2017
First Posted (ESTIMATE)
January 10, 2017
Study Record Updates
Last Update Posted (ACTUAL)
August 14, 2017
Last Update Submitted That Met QC Criteria
August 11, 2017
Last Verified
December 1, 2016
More Information
Terms related to this study
Additional Relevant MeSH Terms
Other Study ID Numbers
- Pro00078117
- P30AG028716-11S1 (NIH)
- SPS # 224571 (OTHER: Duke University)
Plan for Individual participant data (IPD)
Plan to Share Individual Participant Data (IPD)?
NO
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
No
Studies a U.S. FDA-regulated device product
No
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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