PET Imaging of Noradrenergic Transmission in the Brain
Background:
Researchers have developed a new radioactive tracer (11C-ARMI). A tracer is a drug that attaches itself to other chemicals in the body and lights up so that the chemicals can be seen in imaging scans. The new tracer may be able to help them with many diseases, such as Alzheimer s disease and Parkinson s disease. Researchers want to test the new tracer in healthy people.
Objective:
To test a new tracer (11C-ARMI) during imaging scans of the brain and body in healthy people.
Eligibility:
Healthy people aged 18 years and older. They must have been screened under protocols 01-M-0254 or 17M0181.
Design:
All participants will have a positron emission tomography (PET)/computed tomography (CT) scan. Before the scan, they will have blood and urine tests and a test of their heart function. The tracer will be given through a tube attached to a needle inserted into a vein in the arm. They will lie on a padded bed that fits inside a doughnut-shaped machine; the machine uses x-rays to create images of the inside of the body.
Some participants will have a PET/CT scan of their whole body. They will need only 1 visit.
Some participants will have a PET/CT scan of only their brain. They will have up to 2 visits. On the second visit, they will have a magnetic resonance imaging (MRI) scan of the brain. For the MRI, they will lie on a table that slides into a cylinder. The MRI uses magnetic fields to create images of the inside of the body.
Participants will receive a follow-up call to check on their well-being after their PET/CT scans.
Studieöversikt
Detaljerad beskrivning
Study Description:
This study is intended to provide information on the novel 11C-ARMI radioligand and its ability to localize and measure Alpha-1A Adrenoreceptor (alpha-1A AR) in the brain and body of healthy volunteers.
Objectives:
Primary Objective:
To study the brain uptake of 11C-ARMI and perform kinetic modeling of 11C-ARMI in healthy volunteers.
Secondary Objectives:
To study brain retest variability and reliability, biodistribution, and dosimetry of 11C-ARMI in healthy volunteers.
Endpoint:
Primary Endpoint:
For both objectives, the primary endpoint is receptor density measured as distribution volume (VT).
Secondary Endpoint:
Radiation burden to the body and expressed as Effective Dose (ED).
Studietyp
Inskrivning (Beräknad)
Fas
- Fas 1
Kontakter och platser
Studiekontakt
- Namn: Robert B Innis, M.D.
- Telefonnummer: (301) 594-1368
- E-post: robert.innis@nih.gov
Studera Kontakt Backup
- Namn: Tara N Turon, C.R.N.P.
- Telefonnummer: (301) 827-6599
- E-post: tara.turon@nih.gov
Studieorter
-
-
Maryland
-
Bethesda, Maryland, Förenta staterna, 20892
- Rekrytering
- National Institutes of Health Clinical Center
-
Kontakt:
- NIH Clinical Center Office of Patient Recruitment (OPR)
- Telefonnummer: TTY dial 711 800-411-1222
- E-post: ccopr@nih.gov
-
-
Deltagandekriterier
Urvalskriterier
Åldrar som är berättigade till studier
- Vuxen
- Äldre vuxen
Tar emot friska volontärer
Beskrivning
INCLUSION CRITERIA:
- Aged 18 years or older.
- Must have undergone a screening assessment under protocol 01-M-0254, The Evaluation of Patients with Mood and Anxiety Disorders and Healthy Participants or 17M0181 Recruitment and Characterization of Healthy Research Volunteers for NIMH Intramural Studies.
- Be healthy based on medical history, physical examination, and laboratory testing.
- Able to understand and willingness to provide informed consent.
- Willingness to complete all study procedures including MRI tests.
- Have had their radial artery pulse checked for the presence of adequate ulnar collateral flow and the absence of any metal or foreign objects in both wrists.
- Agree to adhere to the lifestyle considerations
EXCLUSION CRITERIA:
An individual who meets any of the following criteria will be excluded from participation in this study:
- Clinically significant abnormalities on EKG or laboratory testing. This includes CBC and acute care panel (Na, K, Cl, CO2, creatinine, glucose, urea nitrogen).
- Recent exposure to radiation (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, including claustrophobia and weight greater than the maximum for the scanner (500 lbs).
- HIV infection.
- Pregnancy or breastfeeding.
- Must not have substance use disorder or alcohol use disorder.
- Unable to travel to the NIH.
- Unable to have an MRI scan (e.g., because of pacemakers or other implanted electrical devices, brain stimulators, dental implants, aneurysm clips (metal clips on the wall of a large artery), metallic prostheses (including metal pins and rods, heart valves, and cochlear implants), permanent eyeliner, implanted delivery pumps, shrapnel fragments, or metal fragments in the eye.
- Taking medications reported to have significant binding to alpha-1 adrenoceptors, medications that that alter norepinephrine release, or medications that lower blood pressure including antihypertensives, diuretics, or phosphodiesterase-5(PDE-5) inhibitors (e.g. sildenafil, tadalafil, vardenafil) within five elimination halflives prior to any [11C]ARMI PET scan.
- Known hypersensitivity to quinazoline-class medications (e.g., prazosin), defined as any prior allergic or clinically significant adverse reaction requiring discontinuation or medical evaluation.
- Blood donation within 8 weeks (2 months) before study participation, or unwillingness to avoid blood donation for 8 weeks (2 months) after the study.
Studieplan
Hur är studien utformad?
Designdetaljer
- Primärt syfte: Diagnostisk
- Tilldelning: N/A
- Interventionsmodell: Enskild gruppuppgift
- Maskning: Ingen (Open Label)
Vapen och interventioner
Deltagargrupp / Arm |
Intervention / Behandling |
|---|---|
|
Övrig: Enarm
Alla försökspersoner kommer att få samma tester.
|
Injected IV followed by PET scanning
|
Vad mäter studien?
Primära resultatmått
Resultatmått |
Åtgärdsbeskrivning |
Tidsram |
|---|---|---|
|
To measure distribution volume
Tidsram: 24 months
|
Target quantification
|
24 months
|
Sekundära resultatmått
Resultatmått |
Tidsram |
|---|---|
|
To measure variability distribution volume
Tidsram: 24 months
|
24 months
|
Samarbetspartners och utredare
Utredare
- Huvudutredare: Robert B Innis, M.D., National Institute of Mental Health (NIMH)
Publikationer och användbara länkar
Användbara länkar
Studieavstämningsdatum
Studera stora datum
Studiestart (Faktisk)
Primärt slutförande (Beräknad)
Avslutad studie (Beräknad)
Studieregistreringsdatum
Först inskickad
Först inskickad som uppfyllde QC-kriterierna
Första postat (Faktisk)
Uppdateringar av studier
Senaste uppdatering publicerad (Faktisk)
Senaste inskickade uppdateringen som uppfyllde QC-kriterierna
Senast verifierad
Mer information
Termer relaterade till denna studie
Nyckelord
Andra studie-ID-nummer
- 10002497
- 002497-M
Plan för individuella deltagardata (IPD)
Planerar du att dela individuella deltagardata (IPD)?
IPD-planbeskrivning
Tidsram för IPD-delning
Kriterier för IPD Sharing Access
IPD-delning som stöder informationstyp
- STUDY_PROTOCOL
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