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11C-Acetate PET/CT Imaging As a Biomarker of Amyloid-Induced Neuroinflammation

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details.
 
ClinicalTrials.gov Identifier: NCT02811744
Recruitment Status : Active, not recruiting
First Posted : June 23, 2016
Last Update Posted : March 25, 2020
Sponsor:
Information provided by (Responsible Party):
University of Pennsylvania

Brief Summary:
The proposed study aims to use 11C-acetate PET/CT to preliminarily test and validate methods for imaging astrocyte activation as an early indicator of neuroinflammation in Alzheimer's disease (AD). 11C-Acetate PET/CT has been shown to quantify astrocyte activation in vivo, but no reports have evaluated its potential in AD. The investigators propose to test 11C-Acetate PET/CT as a marker for astrocyte activation associated with pathologic amyloid deposition in AD. The investigators will compare binding between subjects with early stage AD and healthy controls. Further, the investigators will investigate the correlation between amyloid and acetate binding. If the investigators find increased astrocyte activation in response to cerebral amyloid by showing a group difference in brain acetate uptake between disease and controls or a strong correlation between acetate and amyloid PET/CT binding. Validating neuroinflammation markers in AD ultimately may guide therapeutic modulation of beneficial and damaging neuroinflammation to slow disease progression, as well as providing new insights into AD pathophysiology.

Condition or disease Intervention/treatment Phase
Mild Cognitive Impairment Drug: 11C-acetate Phase 2

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Study Type : Interventional  (Clinical Trial)
Estimated Enrollment : 20 participants
Allocation: Non-Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)
Primary Purpose: Diagnostic
Official Title: 11C-Acetate PET/CT Imaging As a Biomarker of Amyloid-Induced Neuroinflammation
Actual Study Start Date : January 2017
Estimated Primary Completion Date : June 2021
Estimated Study Completion Date : June 2024

Resource links provided by the National Library of Medicine

MedlinePlus related topics: Amyloidosis

Arm Intervention/treatment
Experimental: Amnestic MCI cohort
Patients with Mild Cognitive Impairment (MCI) (up to 14) will be recruited primarily from the Penn Memory Center (PMC). Clinical diagnostic criteria (described in further detail in Study Procedures section) will be used to identify subjects who are meet criteria for amnestic MCI. Participants will receive injection of radioactive tracer 11C-acetate and complete a PET/CT scan.
Drug: 11C-acetate
Participants will receive injection of radioactive tracer 11C-acetate and complete a PET/CT scan.

Control cohort
Normal control subjects in the same age range (up to 6) will be recruited from a current ongoing study investigating neuroinflammation in late life depression and healthy controls, from the control group in which all subjects receive MRI and LP and from the PMC research cohort. Participants will receive injection of radioactive tracer 11C-acetate and complete a PET/CT scan.
Drug: 11C-acetate
Participants will receive injection of radioactive tracer 11C-acetate and complete a PET/CT scan.




Primary Outcome Measures :
  1. Evaluate whether 11C-acetate uptake is increased in amyloid positive Mild Cognitive Impairment (MCI) subjects compared to amyloid negative healthy controls [ Time Frame: 7 days ]

Secondary Outcome Measures :
  1. Correlate 11C-acetate uptake to areas of greater amyloid plaque burden quantified on Amyloid PET/CT [ Time Frame: 7 days ]
  2. Compare 11C-acetate in areas of mildly elevated PET SUVR to areas with high or sub-threshold amyloid burden [ Time Frame: 7 days ]
  3. Correlate 11C-acetate uptake to levels of inflammatory markers in CSF [ Time Frame: 7 days ]


Information from the National Library of Medicine

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Ages Eligible for Study:   65 Years and older   (Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No
Criteria

Inclusion Criteria for amnestic MCI cohort:

  1. Participants will be at least 65 years of age
  2. Positive brain amyloid PET/CT scan within 6 months of study screening
  3. Mini-mental status examination (MMSE) score ≥ 24 at screening visit
  4. A brain MRI is required. If a brain MRI has been performed within 6 months of 11C-Acetate PET/CT and of adequate quality that scan may be used for the study analysis, subjects who do not have a brain MRI will undergo a brain MRI as a part of this study
  5. Participants must identify a study partner who is willing to accompany the patient to study visits
  6. Participants must be informed of the investigational nature of this study and provide written informed consent in accordance with institutional and federal guidelines prior to study-specific procedures. If the patient is unable to provide informed consent, the patient's legal representative may consent on behalf of the patient but the patient will be asked to confirm assent.

Inclusion Criteria for Control cohort:

  1. Participants will be at least 65 years of age
  2. History of negative brain amyloid PET/CT scan within 6 months of study screening OR negative CSF analysis for AD biomarkers within 6 months of study screening
  3. Mini-mental status examination (MMSE) > 27 at screening visit
  4. A brain MRI is required. If a brain MRI has been performed within 6 months of enrollment to this study and of adequate quality that scan may be used for the study analysis, subjects who do not have a brain MRI will undergo a brain MRI as a part of this study
  5. Participants must be informed of the investigational nature of this study and provide written informed consent in accordance with institutional and federal guidelines prior to study-specific procedures.

Exclusion Criteria for both cohorts:

  1. Inability to tolerate or contraindication to imaging procedures (PET/CT or MRI) in the opinion of an investigator or treating physician
  2. History of stroke or other neurological disease that in the opinion of the investigator might interfere with evaluation of the 11C-Acetate scan
  3. Any medical or psychological conditions that, in the opinion of the investigator, would compromise the subject's safety or successful participation in the study.

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT02811744


Locations
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United States, Pennsylvania
University of Pennsylvania
Philadelphia, Pennsylvania, United States, 19104
Sponsors and Collaborators
University of Pennsylvania
Investigators
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Principal Investigator: Ilya Nasrallah, MD University of Pennsylvania
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Responsible Party: University of Pennsylvania
ClinicalTrials.gov Identifier: NCT02811744    
Other Study ID Numbers: 824822
First Posted: June 23, 2016    Key Record Dates
Last Update Posted: March 25, 2020
Last Verified: March 2020
Individual Participant Data (IPD) Sharing Statement:
Plan to Share IPD: Undecided
Additional relevant MeSH terms:
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Cognitive Dysfunction
Cognition Disorders
Neurocognitive Disorders
Mental Disorders