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Brain Effects of Opiate Agonist and Antagonist

13. april 2021 opdateret af: Paul Geha, University of Rochester
This study will look at the short-term effect of morphine on brain response to food.

Studieoversigt

Status

Afsluttet

Betingelser

Intervention / Behandling

Detaljeret beskrivelse

Chronic low back pain patients and healthy controls will be recruited for this study. Participants' brain will be scanned at baseline and then again on a different day after the administration of an oral dose of 30 mg morphine in an open label design. Participants will receive morphine 60 minutes prior to the start of the second scanning session. The brain scans will include structural scans, functional scans at rest and functional scans during the ingestion of a highly caloric drink.

Undersøgelsestype

Interventionel

Tilmelding (Faktiske)

10

Fase

  • Fase 4

Kontakter og lokationer

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

Studiesteder

  • Forenede Stater
    • Connecticut
      • New Haven, Connecticut, Forenede Stater, 06519
        • Yale University

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

18 år til 65 år (Voksen, Ældre voksen)

Tager imod sunde frivillige

Ja

Køn, der er berettiget til at studere

Alle

Beskrivelse

Inclusion Criteria:

  • Healthy participants
  • Patients in pain: suffering from persistent pain more days than not, 3/10 in intensity on a numerical rating scale, for at least 6 weeks or more.

Exclusion Criteria:

  • Any DSM diagnosis
  • diabetes
  • food allergies
  • lactose intolerance
  • participants seeking to quit smoking or to lose weight
  • participants on any psychotropic medication including opiate based analgesics (e.g. oxycodone, methadone, suboxone)
  • pregnant or nursing women
  • pacemaker or other implanted electrical devices
  • Participants with a past history of head trauma or seizures
  • Any past history of illegal drug or alcohol misuse
  • Participants who cannot undergo an MRI scan.

Studieplan

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

Hvordan er undersøgelsen tilrettelagt?

Design detaljer

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

Våben og indgreb

Deltagergruppe / Arm
Intervention / Behandling
Eksperimentel: All Participants
People with low back pain who were given and oral dose of 30 mg morphine.
Medicin: Morphine
30 mg oral tablet

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Mean Change in Subcortical Brain Structure Volume
Tidsramme: baseline to 1 hour
Magnetic Resonance Imaging (MRI) scanning was performed to collect brain volume measurements in cc. There were 4 different areas of the brain that were analyzed.
baseline to 1 hour
Change in Brain Response to Highly Caloric Drink
Tidsramme: baseline to 1 hour
Participants received a highly caloric drink and a tasteless solution during a functional MRI scanning session. A general linear model was used to generate the magnitude of the fit for each type of stimuli and differences between the fits were calculated. A within subject analysis approach was used to calculate the effect of an acute dose of morphine on brain response to the highly caloric drink. Participants contributed beta values that were averaged across subjects and based on the average and standard deviation, the software, FSL, calculated Z = 4.38. This value indicates 4.38 standard deviations away from the mean in a distribution with a mean of zero and standard deviation of 1, which is the definition of the Gaussian curve (Z-distribution). It is scientifically not valid to say there is a higher or lower brain response. A Z-score = 0 means no change from baseline in brain response; a Z-score different from zero indicates a change from baseline after the ingestion of morphine.
baseline to 1 hour
Mean Change in Resting Brain Activity in the Nucleus Accumbens
Tidsramme: baseline to 1 hour
Participants were scanned at rest during a functional MRI session. The resting brain activity was measured as the Power spectral density slow-4 frequency band. Data collected in the frequency range 0 and 0.5 Hertz was analyzed. We examined the power spectral density in the range of 0.027 to 0.073 Hertz. The mean change is expressed as arbitrary units after a Fourier transformation of the data which cancels out the units. The mean change ranges from 0 to 175. The higher the number the more energy within that frequency band.
baseline to 1 hour

Sekundære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Mean Change in Back Pain Intensity
Tidsramme: baseline to 1 hour
Pain was rated using a visual analog scale ranging from 0-100 with 100 indicating the worst imaginable pain ever.
baseline to 1 hour

Samarbejdspartnere og efterforskere

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

Sponsor

University of Rochester

Efterforskere

  • Ledende efterforsker: Paul Geha, MD, Department of Psychiatry in University of Rochester

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 (Faktiske)

27. april 2018

Primær færdiggørelse (Faktiske)

16. april 2019

Studieafslutning (Faktiske)

16. april 2019

Datoer for studieregistrering

Først indsendt

8. april 2020

Først indsendt, der opfyldte QC-kriterier

8. april 2020

Først opslået (Faktiske)

10. april 2020

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Faktiske)

7. maj 2021

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

13. april 2021

Sidst verificeret

1. april 2021

Mere information

Begreber relateret til denne undersøgelse

Yderligere relevante MeSH-vilkår

Andre undersøgelses-id-numre

  • YaleIRB#1607018141

Plan for individuelle deltagerdata (IPD)

Planlægger du at dele individuelle deltagerdata (IPD)?

JA

IPD-planbeskrivelse

Data available from this trial will made available to researcher via reasonable request from the PI.

IPD-delingstidsramme

study protocol and analytic code will be available after manuscript publication

IPD-delingsadgangskriterier

Upon reasonable request from the PI

IPD-deling Understøttende informationstype

  • STUDY_PROTOCOL
  • SAP

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 .

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