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Glutamatergic Modulation of Cocaine-related Deficits

16. april 2019 opdateret af: Elias Dakwar, New York State Psychiatric Institute

The Effect of Ketamine on Reducing Cue Reactivity in Cocaine Users

Cocaine dependence involves problematic neuroadaptations, such as heightened reactivity to cocaine cues, that may be responsive to pharmacological modulation of glutamatergic circuits. Despite promising preclinical findings with n-methyl-d-aspartate receptor (NMDAr) modulators, studies with human subjects have been unsuccessful to date. The purpose of this investigation is to examine the effects of the NMDAr antagonist ketamine, recently found to have potent therapeutic effects in humans, on cue-induced craving and impaired motivation for quitting cocaine in cocaine dependent participants, 24-hours post-infusion.

Studieoversigt

Status

Afsluttet

Betingelser

Intervention / Behandling

Detaljeret beskrivelse

In this study, volunteers will undergo a 9 day inpatient trial during which they will receive three counter-balanced infusions (two doses of ketamine and a dose of lorazepam) on three separate days in a within-subject, double-blind, controlled design. Of the various glutamate antagonists available for human use, ketamine will be utilized because its safety profile, pharmacokinetics, and range of tolerable sub-anesthetic dosings have been very well studied. Also, ketamine has shown promise in managing opiate and alcohol use disorders in certain studies, and may therefore be the most likely glutamate antagonist to dampen cue reactivity and increase motivation in cocaine users. If ketamine significantly improves these deficits, this would suggest that the drug should be investigated further for potential utility as a treatment for cocaine dependence.

Undersøgelsestype

Interventionel

Tilmelding (Faktiske)

8

Fase

  • Fase 2

Kontakter og lokationer

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

Studiesteder

  • Forenede Stater
    • New York
      • New York, New York, Forenede Stater, 10032
        • NYSPI

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

21 år til 52 år (Voksen)

Tager imod sunde frivillige

Ingen

Køn, der er berettiget til at studere

Alle

Beskrivelse

Inclusion Criteria

  1. Active free-base cocaine dependence (at least 4 days of use over the past month, with at least 1 use per week); if the participant uses through another route (IN, IV), then the FB route is dominant (> 80% of occasions).
  2. Physically healthy
  3. No adverse reactions to study medications
  4. 21-52 years of age
  5. Normal body weight
  6. Responsive to drug cues
  7. Capacity to consent

Exclusion Criteria:

  1. Seeking treatment or abstinence
  2. DSM IV criteria for substance dependence (other than methamphetamine, cocaine, cannabis, or nicotine), or DSM IV criteria for abuse of ketamine or lorazepam
  3. DSM-IV criteria for other Axis I psychiatric illness that may make participation hazardous such as schizophrenia, schizoaffective disorder, psychosis NOS, MDD, psychosis secondary to substances, or bipolar disorder
  4. Delirium, Dementia, Amnesia, Cognitive Disorders, or dissociative disorders
  5. Current suicide risk or a history of suicide attempt within the past 2 years
  6. Current use of prescribed psychotropic medication
  7. Pregnancy, nursing, or had a baby within the past 6 mo.
  8. Heart disease as indicated by history, abnormal ECG, previous cardiac surgery.
  9. Unstable physical disorders which might make participation hazardous such as end-stage AIDS, hypertension (>140/90), anemia, active hepatitis or other liver disease, or diabetes
  10. "Bad" reaction/experience with prior exposure to ketamine or lorazepam
  11. History of significant violence
  12. First degree relative with a psychotic disorder

Studieplan

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

Hvordan er undersøgelsen tilrettelagt?

Design detaljer

  • Primært formål: Behandling
  • Tildeling: Randomiseret
  • Interventionel model: Crossover opgave
  • Maskning: Tredobbelt

Våben og indgreb

Deltagergruppe / Arm
Intervention / Behandling
Eksperimentel: K1
Ketamine 0.41 mg/kg infused over 52 min (K1)
Medicin: Ketamine 0.41 mg/kg
52 minute iv infusion of ketamine 0.41 mg/kg
Andre navne:
  • K1
Eksperimentel: K2
Ketamine 0.71 mg/kg infused over 52 min (K2)
Medicin: Ketamine 0.71 mg/kg
52 minute iv infusion of ketamine 0.71 mg/kg. This dose follows K1 in all 3 orderings.
Andre navne:
  • K2
Eksperimentel: LZP
Lorazepam 2 mg infused over 52 minutes (LZP)
Medicin: Lorazepam 2 mg
52 minute infusion of lorazepam 2 mg. This serves as an active control.
Andre navne:
  • LZP

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Change in Cue Reactivity
Tidsramme: Baseline and 24 hours after infusion
Serial visual analogue scale (VAS) scores for craving elicited by cocaine cue: units on a scale (0-200), high is worse. Scores are obtained at baseline and at 24 hours after the infusion.
Baseline and 24 hours after infusion
Change in Motivation to Quit
Tidsramme: Baseline and 24 hours post-infusion
Motivation score obtained from the University of Rhode Island Change Assessment (URICA). Scores are obtained at baseline and at 24 hours after each infusion. The scores are 0-13, with higher scores indicating greater motivation. The analysis is within-subject. Scores included below are means; higher scores represent higher motivation to quit than do lower scores.
Baseline and 24 hours post-infusion

Samarbejdspartnere og efterforskere

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

Sponsor

New York State Psychiatric Institute

Efterforskere

  • Ledende efterforsker: Elias Dakwar, MD, NYSPI/Columbia College of Physicians and Surgeons
  • Studiestol: Carl Hart, PhD, NYSPI/Columbia College of Physicians and Surgeons

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.

Generelle publikationer

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

1. februar 2011

Primær færdiggørelse (Faktiske)

1. marts 2012

Studieafslutning (Faktiske)

1. marts 2012

Datoer for studieregistrering

Først indsendt

8. februar 2013

Først indsendt, der opfyldte QC-kriterier

11. februar 2013

Først opslået (Skøn)

13. februar 2013

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Faktiske)

30. april 2019

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

16. april 2019

Sidst verificeret

1. april 2019

Mere information

Begreber relateret til denne undersøgelse

Yderligere relevante MeSH-vilkår

Andre undersøgelses-id-numre

  • #6162

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 Ketamine 0.41 mg/kg

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