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The Impact of Reward-induced Dopamine Release on Functional Connectivity: a Combined PET/fMRI Study

16. april 2018 oppdatert av: David Hsu, Stony Brook University
The present study would be the first to investigate the relationship between reward- and or social stimuli-induced dopamine (DA) release and neural function using a combined PET/fMRI approach. Data from this project conducted in healthy subjects will provide preliminary data for a larger grant application to study patient populations with known abnormalities in DA including schizophrenia, major depressive, substance use, and eating disorders.

Studieoversikt

Status

Fullført

Forhold

Detaljert beskrivelse

Aim 1. To test the relationship between reward-induced dopamine (DA) release on changes in resting state functional connectivity (RSFC) in healthy subjects. In 20 healthy adults, the investigators will examine DA release (measured using positron emission tomography, PET) in the ventral striatum, thalamus, and prefrontal cortex, as previously described. Before and after the task the investigators will examine RSFC (measured using functional magnetic resonance imaging, fMRI) between these structures, which have been shown to form functional pathways serving motivation and emotion regulation in rodents and nonhuman primates. The investigators hypothesize that DA release will impact the functional relationship between these and other structures as determined by changes in RSFC.

Aim 2. To examine the relationship between dopamine release and the Reward Positivity (RewP) potential. Subjects will be presented with the option to participate in an event-related potential (ERP) study. The investigators will correlate the amount of DA release with the amplitude of the RewP potential, an ERP that is enhanced in reward versus non-reward circumstances. Based on previous studies, the investigators hypothesize that RewP amplitude will positively correlate with dopamine release in the nucleus accumbens.

Studietype

Observasjonsmessig

Registrering (Faktiske)

5

Kontakter og plasseringer

Denne delen inneholder kontaktinformasjon for de som utfører studien, og informasjon om hvor denne studien blir utført.

Studiesteder

  • Forente stater
    • New York
      • Stony Brook, New York, Forente stater, 11794
        • Health Sciences Center

Deltakelseskriterier

Forskere ser etter personer som passer til en bestemt beskrivelse, kalt kvalifikasjonskriterier. Noen eksempler på disse kriteriene er en persons generelle helsetilstand eller tidligere behandlinger.

Kvalifikasjonskriterier

Alder som er kvalifisert for studier

18 år til 45 år (Voksen)

Tar imot friske frivillige

Ja

Kjønn som er kvalifisert for studier

Alle

Prøvetakingsmetode

Ikke-sannsynlighetsprøve

Studiepopulasjon

20 subjects (ages 18-45 years) will be included. Male and female representation will be about equal. No ethnic/racial/gender group is excluded.

Beskrivelse

Inclusion Criteria:

  1. Healthy men and women age 18-45 who have the capacity to consent to the protocol.
  2. Ability to understand and follow instructions and oriented to name, time, and place.
  3. A negative urine pregnancy and toxicology screen
  4. Willingness to abstain from using aspirin, NSAIDs, or anticoagulants during the study

Exclusion Criteria:

  1. Left-handed or ambidextrous
  2. History of seizures
  3. History of strokes
  4. Clinically significant, uncontrolled liver, kidney, cardiac, or pulmonary disease
  5. Terminal medical diagnosis consistent with survival < 1 year
  6. Serious mental impairment. Mini mental state exam of < 23/30
  7. Current or past DSM-IV Axis I or neurologic disorders
  8. Actively abusing substances, including alcohol (regular alcohol use during the past 6 months equal to or greater than 16 cans of beer per week or equivalent; use of street drugs or regular tobacco use during the past 6 months)
  9. Unstable medical condition (≥ 3 months), or serious medical illnesses during the past three months (e.g., serious infections)
  10. Unexplained loss of consciousness; history of traumatic brain injury involving loss of consciousness greater than 2 minutes
  11. Currently pregnant or breastfeeding, sexually active and of child-bearing potential and not using adequate contraceptive methods
  12. Childbirth or miscarriage during past 6 months, breastfeeding within 6 months of recruitment
  13. Allergic to latex and/or study pharmaceuticals
  14. Diabetes and/or unable to fast for up to 7 hours
  15. Unable to lie comfortably in the scanner for up to 4 consecutive hours
  16. Would receive a total of over 5 rems to a radiosensitive organ (bone marrow, gonads, lens of the eye) or 15 rems to any other organ or to the body as a whole during a 12 month period
  17. Contraindications for MRI including neurostimulators, implanted medical devices, metal in the body, claustrophobia, weight over 440 pounds, and girth size incompatible for scanner bore.
  18. Participation in a similar Social Feedback Task within 2 months of the start of the study.

Studieplan

Denne delen gir detaljer om studieplanen, inkludert hvordan studien er utformet og hva studien måler.

Hvordan er studiet utformet?

Designdetaljer

Hva måler studien?

Primære resultatmål

Resultatmål
Tiltaksbeskrivelse
Tidsramme
Dopamine receptor binding potential
Tidsramme: 1-3 weeks
changes in dopamine receptor binding potential will be measured during and after a reward task or social stimulus task
1-3 weeks
Resting state fMRI
Tidsramme: 1-3 weeks
Resting state functional connectivity will be measured using fMRI
1-3 weeks
Event-related potential (ERP) during reward
Tidsramme: 1-3 weeks
ERP during a reward task is measured
1-3 weeks

Samarbeidspartnere og etterforskere

Det er her du vil finne personer og organisasjoner som er involvert i denne studien.

Sponsor

Stony Brook University

Studierekorddatoer

Disse datoene sporer fremdriften for innsending av studieposter og sammendragsresultater til ClinicalTrials.gov. Studieposter og rapporterte resultater gjennomgås av National Library of Medicine (NLM) for å sikre at de oppfyller spesifikke kvalitetskontrollstandarder før de legges ut på det offentlige nettstedet.

Studer hoveddatoer

Studiestart

1. juni 2016

Primær fullføring (Faktiske)

1. desember 2017

Studiet fullført (Faktiske)

1. desember 2017

Datoer for studieregistrering

Først innsendt

13. juni 2016

Først innsendt som oppfylte QC-kriteriene

15. juni 2016

Først lagt ut (Anslag)

16. juni 2016

Oppdateringer av studieposter

Sist oppdatering lagt ut (Faktiske)

17. april 2018

Siste oppdatering sendt inn som oppfylte QC-kriteriene

16. april 2018

Sist bekreftet

1. april 2018

Mer informasjon

Begreper knyttet til denne studien

Nøkkelord

Andre studie-ID-numre

  • PET/MR Pilot

Plan for individuelle deltakerdata (IPD)

Planlegger du å dele individuelle deltakerdata (IPD)?

NEI

Denne informasjonen ble hentet direkte fra nettstedet clinicaltrials.gov uten noen endringer. Hvis du har noen forespørsler om å endre, fjerne eller oppdatere studiedetaljene dine, vennligst kontakt register@clinicaltrials.gov. Så snart en endring er implementert på clinicaltrials.gov, vil denne også bli oppdatert automatisk på nettstedet vårt. .

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