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PET Imaging of Noradrenergic Transmission in the Brain

13. juli 2026 opdateret af: National Institute of Mental Health (NIMH)

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.

Studieoversigt

Status

Rekruttering

Betingelser

Intervention / Behandling

Detaljeret beskrivelse

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).

Undersøgelsestype

Interventionel

Tilmelding (Anslået)

40

Fase

  • Fase 1

Kontakter og lokationer

Dette afsnit indeholder kontaktoplysninger for dem, der udfører undersøgelsen, og oplysninger om, hvor denne undersøgelse udføres.

Studiekontakt

Undersøgelse Kontakt Backup

Studiesteder

  • Forenede Stater
    • Maryland
      • Bethesda, Maryland, Forenede Stater, 20892
        • Rekruttering
        • National Institutes of Health Clinical Center
        • Kontakt:
          • NIH Clinical Center Office of Patient Recruitment (OPR)
          • Telefonnummer: TTY dial 711 800-411-1222
          • E-mail: ccopr@nih.gov

Deltagelseskriterier

Forskere leder efter personer, der passer til en bestemt beskrivelse, kaldet berettigelseskriterier. Nogle eksempler på disse kriterier er en persons generelle helbredstilstand eller tidligere behandlinger.

Berettigelseskriterier

Aldre berettiget til at studere

  • Voksen
  • Ældre voksen

Tager imod sunde frivillige

Ja

Beskrivelse

  • INCLUSION CRITERIA:

    1. Aged 18 years or older.
    2. 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.
    3. Be healthy based on medical history, physical examination, and laboratory testing.
    4. Able to understand and willingness to provide informed consent.
    5. Willingness to complete all study procedures including MRI tests.
    6. 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.
    7. 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:

  1. Clinically significant abnormalities on EKG or laboratory testing. This includes CBC and acute care panel (Na, K, Cl, CO2, creatinine, glucose, urea nitrogen).
  2. Recent exposure to radiation (i.e., PET from other research) that, when combined with this study, would be above the allowable limits.
  3. 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).
  4. HIV infection.
  5. Pregnancy or breastfeeding.
  6. Must not have substance use disorder or alcohol use disorder.
  7. Unable to travel to the NIH.
  8. 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.
  9. 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.
  10. Known hypersensitivity to quinazoline-class medications (e.g., prazosin), defined as any prior allergic or clinically significant adverse reaction requiring discontinuation or medical evaluation.
  11. 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

Dette afsnit indeholder detaljer om studieplanen, herunder hvordan undersøgelsen er designet, og hvad undersøgelsen måler.

Hvordan er undersøgelsen tilrettelagt?

Design detaljer

  • Primært formål: Diagnostisk
  • Tildeling: N/A
  • Interventionel model: Enkelt gruppeopgave
  • Maskning: Ingen (Åben etiket)

Våben og indgreb

Deltagergruppe / Arm
Intervention / Behandling
Andet: En-arm
Alle forsøgspersoner modtager de samme tests.
Medicin: 11C-ARMI
Injected IV followed by PET scanning

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
To measure distribution volume
Tidsramme: 24 months
Target quantification
24 months

Sekundære resultatmål

Resultatmål
Tidsramme
To measure variability distribution volume
Tidsramme: 24 months
24 months

Samarbejdspartnere og efterforskere

Det er her, du vil finde personer og organisationer, der er involveret i denne undersøgelse.

Sponsor

National Institute of Mental Health (NIMH)

Efterforskere

  • Ledende efterforsker: Robert B Innis, M.D., National Institute of Mental Health (NIMH)

Publikationer og nyttige links

Den person, der er ansvarlig for at indtaste oplysninger om undersøgelsen, leverer frivilligt disse publikationer. Disse kan handle om alt relateret til undersøgelsen.

Hjælpsomme links

Datoer for undersøgelser

Disse datoer sporer fremskridtene for indsendelser af undersøgelsesrekord og resumeresultater til ClinicalTrials.gov. Studieregistreringer og rapporterede resultater gennemgås af National Library of Medicine (NLM) for at sikre, at de opfylder specifikke kvalitetskontrolstandarder, før de offentliggøres på den offentlige hjemmeside.

Studer store datoer

Studiestart (Anslået)

19. juli 2026

Primær færdiggørelse (Anslået)

5. februar 2029

Studieafslutning (Anslået)

20. februar 2030

Datoer for studieregistrering

Først indsendt

3. juli 2026

Først indsendt, der opfyldte QC-kriterier

6. juli 2026

Først opslået (Faktiske)

7. juli 2026

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Faktiske)

14. juli 2026

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

13. juli 2026

Sidst verificeret

2. juli 2026

Mere information

Begreber relateret til denne undersøgelse

Nøgleord

Andre undersøgelses-id-numre

  • 10002497
  • 002497-M

Plan for individuelle deltagerdata (IPD)

Planlægger du at dele individuelle deltagerdata (IPD)?

JA

IPD-planbeskrivelse

The results will be submitted to ClinicalTrials.gov

IPD-delingstidsramme

18 months after closure of protocol.

IPD-delingsadgangskriterier

BTRIS

IPD-deling Understøttende informationstype

  • STUDY_PROTOCOL

Lægemiddel- og udstyrsoplysninger, undersøgelsesdokumenter

Studerer et amerikansk FDA-reguleret lægemiddelprodukt

Ja

Studerer et amerikansk FDA-reguleret enhedsprodukt

Ingen

Disse oplysninger blev hentet direkte fra webstedet clinicaltrials.gov uden ændringer. Hvis du har nogen anmodninger om at ændre, fjerne eller opdatere dine undersøgelsesoplysninger, bedes du kontakte register@clinicaltrials.gov. Så snart en ændring er implementeret på clinicaltrials.gov, vil denne også blive opdateret automatisk på vores hjemmeside .

Kliniske forsøg med 11C-ARMI

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Betingelser

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Kosttilskud

Sponsor / samarbejdspartnere

Placeringer

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