- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT03324646
Evaluation of a Novel PET Radioligand to Image Cyclooxygenase-1 (COX-1)
Background:
A radioligand is a radioactive substance that is used to diagnose diseases. A new ligand is called [11C]PS13. This has a small amount of radioactivity that can be detected by a positron emission tomography (PET) scan. If this ligand works well in this study, researchers may be able to use it to better understand and diagnose brain disorders.
Objectives:
To evaluate if [11C]PS13 can measure its receptor, which is involved in inflammation. To see if researchers get the same results when scanning a person twice.
Eligibility:
Healthy people ages 18 and older who are in Protocol 01-M-0254.
Design:
This study requires three visits of 2-5 hours each.
Participants will have 2 PET scans with [11C]PS13.
A needle will guide a small plastic tube (catheter) into an arm vein. The needle will be removed, leaving only the catheter in the vein. The ligand will be injected through the catheter.
The PET scanner is shaped like a doughnut. Participants will lie on a bed that slides in and out of the scanner.
Participants will wear a molded a plastic mask that fits the head.
Another catheter will be put into an artery at the wrist or elbow area.
Vital signs will be monitored during the PET scan. Participants will have a test during the PET scan to monitor heart function.
Participants will have blood and urine tests.
Participants will have 1 magnetic resonance imaging (MRI) scan. The MRI scanner is a metal cylinder surrounded by a strong magnetic field. Participants will lie on a table that slides in and out of the cylinder.
Study Overview
Detailed Description
Objective
The cyclooxygenase (COX) system is implicated in the pathophysiology of brain diseases, including Alzheimer s disease and depression, and is a potential biomarker for neuroinflammation. COX is the rate-limiting enzyme in the synthesis of prostaglandins from arachidonic acid and exists as two primary isoforms COX-1 and COX-2. Our laboratory recently developed [(11)C]PS13, a novel PET ligand to selectively image COX-1, and initial PET scans in monkey demonstrated that [11C]PS13 is a promising ligand.
This study has two primary objectives. First, we will determine whether the uptake of [(11)C]PS13 in brain and periphery reflects the distribution of COX-1, as demonstrated by blocking with a COX-1 preferential drug (aspirin or ketoprofen) and/or no effect with a COX-2 selective drug (celecoxib). Second, we will measure the test/retest reproducibility of brain uptake quantified by compartmental modeling and using arterial and/or venous blood samples.
Study Population
Healthy adult volunteers (aged 18 years or older) will have either whole body imaging (n = 41) or brain imaging (n = 20).
Design
Phase 1: We will begin with whole body scanning in a single human subject using up to 10 mCi. The aim of this first scan will be to detect a tracer that disproportionately accumulates in a single radiosensitive organ, such as the gonads. If we confirm that radioactivity is fairly widely distributed in the body, higher activities may be injected.
Phase 2:Thirty healthy subjects will have three whole body imaging PET scans using 20 mCi of [11C]PS13. Scan 1 will serve as the baseline scan for comparison to enzyme occupancy studies and will provide dosimetry information. Scan 2 will be an enzyme occupancy study using the COX-2 selective antagonist celecoxib. Scan 3 will be an enzyme occupancy study using the COX-1 preferential antagonist aspirin. Ten healthy subjects will have two whole body imaging PET scans using 20 mCi of [11C]PS13. Scan
1 will serve as the baseline scan, and scan 2 will be an enzyme occupancy study using another potent COX-1 antagonist ketoprofen.
Phase 3: We will perform 15 test retest kinetic brain imaging PET studies with arterial and/or venous blood sampling and 5 test retest brain PET studies with both arterial and venous blood sampling, using a 20 mCi dose of [(11)C]PS13.
Outcome Measures
For whole body imaging, organ uptake will be quantified as a Standardized Uptake Value (SUV), which normalizes for injected activity and body weight. Blockade by aspirin, ketoprofen, and celecoxib will be expressed as a percentage of the baseline scan in each subject and plotted relative to the plasma concentration of the drug at time of the PET scan. For dedicated brain imaging, uptake will be quantified as distribution volume (VT) calculated with compartmental modeling and serial concentrations of parent radioligand in arterial and/or
venous plasma.
Study Type
Enrollment (Actual)
Contacts and Locations
Study Contact
- Name: Robert B Innis, M.D.
- Phone Number: (301) 594-1368
- Email: robert.innis@nih.gov
Study Contact Backup
- Name: Tara N Turon, C.R.N.P.
- Phone Number: (301) 496-9423
- Email: tara.turon@nih.gov
Study Locations
-
-
Maryland
-
Bethesda, Maryland, United States, 20892
- National Institutes of Health Clinical Center
-
-
Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Sampling Method
Study Population
Description
- INCLUSION CRITERIA:
- Aged 18 years or older.
- Able to provide informed consent.
- Medically and psychiatrically healthy.
- Enrolled in 01-M-0254 The Evaluation of Participants with Mood and Anxiety Disorders and Healthy Volunteers or 17-M-0181, Recruitment and Characterization of Healthy Research Volunteers for NIMH Intramural Studies".
EXCLUSION CRITERIA All phases
- Because non-steroidal anti-inflammatory drugs (NSAIDs) inhibit COX-1 and/or COX-2, subjects should not have taken NSAIDs for two weeks prior to the PET scan. In addition, aspirin must not have been taken in the prior month, as aspirin irreversibly inhibits COX.
- Clinically significant laboratory abnormalities based on tests performed under screening protocol 01-M-0254 or 17-M-0181 and specified in Section 4.c Screening.
- Any current Axis I diagnosis, based on interview and self-reporting performed under screening protocol 01-M-0254 or 17-M-0181.
- HIV infection.
- History of medical or neurologic illness or injury with the potential to affect study data interpretation.
- Recent exposure to radiation related to research (i.e. PET from other research) that, when combined with this study, would be above the allowable limits.
- Inability to lie flat on camera bed for at least two hours.
- Pregnancy or breastfeeding.
- Participants must not have substance use disorder or alcohol use disorder. However, alcohol or cannabis use by themselves are not
exclusion criteria, unless that use impairs function of daily life..
- Current use of psychiatric medications.
- NIMH employees and staff or an NIH employee who is a subordinate/relative/co-worker of the investigators.
EXCLUSION CRITERIA Phase 2:
- Because aspirin and celecoxib require an acidic environment to be absorbed in the stomach, we will exclude those who have taken proton pump inhibitor (PPI) drugs, H-2 receptor antagonist drugs, and antacid drugs in the last two weeks.
additional contraindications to taking COX-1 or COX-2 inhibitors include:
- history of hypersensitivity reaction to COX inhibitors history of aspirin- or NSAID-induced asthma.
- history of upper or lower gastrointestinal bleeding, gastritis, peptic ulcer disease, or gastroesophageal reflux disease (GERD).
- coagulation disorder.
- thrombocytopenia.
- G6PD deficiency.
- history of gout.
- history of hepatic or renal impairment.
- history of cardiovascular disease or presence of cardiovascular risk factors such as hypertension.
EXCLUSION CRITERIA Phase 3:
- Artery check for art line
- Unable to have an MRI scan
NIH employees are eligible to participate. NIMH employee participation is guided by intramural institute policy.
Study Plan
How is the study designed?
Design Details
- Observational Models: Cohort
- Time Perspectives: Other
Cohorts and Interventions
Group / Cohort |
Intervention / Treatment |
---|---|
controls
healthy subjects
|
A novel PET ligand to selectively image COX-1
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
PET tracer update
Time Frame: during PET scan
|
For whole body imaging, organ uptake will be quantified as a Standardized Uptake Value (SUV), which normalizes for injected activity and body weight.
Blockade by aspirin, ketoprofen, and celecoxib will be expressed as a percentage of the baseline scan in each subject and plotted relative to the plasma concentration of the drug at time of the PET scan.
For dedicated brain imaging, uptake will be quantified as distribution volume (VT) calculated with compartmental modeling and serial concentrations of parent radioligand in arterial and/or venous plasma.
|
during PET scan
|
Collaborators and Investigators
Investigators
- Principal Investigator: Robert B Innis, M.D., National Institute of Mental Health (NIMH)
Publications and helpful links
Helpful Links
Study record dates
Study Major Dates
Study Start (Actual)
Primary Completion (Actual)
Study Completion (Actual)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Actual)
Study Record Updates
Last Update Posted (Actual)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Keywords
Other Study ID Numbers
- 170179
- 17-M-0179
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
Studies a U.S. FDA-regulated device product
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.
Clinical Trials on Normal Physiology
-
Massachusetts General HospitalRecruitingNormal PhysiologyUnited States
-
National Institute of Environmental Health Sciences...Not yet recruiting
-
National Institute of Neurological Disorders and...RecruitingNormal PhysiologyUnited States
-
National Institute of Neurological Disorders and...RecruitingNormal PhysiologyUnited States
-
National Institute of Neurological Disorders and...CompletedNormal PhysiologyUnited States
-
National Institute of Neurological Disorders and...Completed
-
National Center for Complementary and Integrative...Completed
-
National Cancer Institute (NCI)CompletedNormal PhysiologyUnited States
-
Sunnybrook Health Sciences CentreNot yet recruitingNormal Physiology
-
National Institute of Neurological Disorders and...National Institute for Biomedical Imaging and Bioengineering (NIBIB)RecruitingNormal PhysiologyUnited States
Clinical Trials on [11C]PS13
-
National Institute of Mental Health (NIMH)University of MarylandCompleted
-
National Institute of Mental Health (NIMH)RecruitingParkinson's Disease | Dementia | ALS | Alzheimer's DiseaseUnited States
-
Columbia UniversityRecruitingNeurodegenerative Diseases | Amyotrophic Lateral Sclerosis | Alzheimer DiseaseUnited States
-
National Institute of Mental Health (NIMH)TerminatedDementiaUnited States
-
Hoffmann-La RocheCompletedAlzheimer's Disease, Healthy VolunteerUnited States
-
Wendell Yap, MDUniversity of Kansas Medical CenterNo longer availableProstate CancerUnited States
-
Columbia UniversityCompleted
-
Yale UniversityNational Center for Complementary and Integrative Health (NCCIH)RecruitingBehavior, HealthUnited States
-
Universitaire Ziekenhuizen KU LeuvenCHDI Foundation, Inc.Completed
-
Columbia UniversityNational Institute on Aging (NIA)RecruitingAlzheimer DiseaseUnited States