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Effects of Smoking Cues on Tobacco Craving Responses and the Reinforcing Efficacy of Cigarettes in Smokers With and Without Schizophrenia

15. august 2019 opdateret af: MPRC, University of Maryland, Baltimore

In this study, we will compare cue-reactivity in smokers with and without schizophrenia and the influence of smoking cues on responding for cigarette puffs under a PR schedule of reinforcement. Given the high prevalence of smoking among individuals with schizophrenia, understanding some of the environmental factors that serve to maintain nicotine dependence is a critical step in improving smoking cessation treatment outcomes. Establishing and validating a laboratory model of cue-elicited responsivity and cigarette self- administration will allow the investigation of the efficacy of anti-craving medications in people with schizophrenia.

Specific Aims 1) To compare the effects of smoking versus neutral cues on craving, mood, and autonomic responsivity in smokers with schizophrenia and smokers without schizophrenia. 2) To compare the effects of smoking versus neutral cues on the reinforcing efficacy of tobacco cigarettes in smokers with schizophrenia and smokers without schizophrenia.

Outcome Measures During cue trials, primary measures include craving (TCQ-SF, VAS), mood (mood form, VAS), and autonomic (heart rate, blood pressure, skin conductance and temperature) responsivity. During self-administration trials, primary measures include breakpoint (final ratio completed), total number of responses, and number of cigarette puffs earned and taken. Secondary measures include baseline smoking history, mood form, TCQ-SF, CO, FTND, and urinary cotinine and 3-hydroxycotinine (3-HC).

The ratio of 3-HC/cotinine is a phenotypic biomarker of the rate of nicotine metabolism, which has been shown to be associated with level of nicotine dependence, various smoking behaviors, and treatment outcome (Ho & Tyndale, 2007). We will correlate the primary measures with the 3-HC/cotinine ratio to explore possible relationships for future study.

Studieoversigt

Status

Afsluttet

Betingelser

Intervention / Behandling

Undersøgelsestype

Interventionel

Tilmelding (Forventet)

44

Fase

  • Ikke anvendelig

Kontakter og lokationer

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

Studiesteder

  • Forenede Stater
    • Maryland
      • Catonsville, Maryland, Forenede Stater, 21228
        • Maryland Psychiatric Research Center (MPRC) Outpatient Research Program (ORP); the MPRC Treatment Research Program (TRP)

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 64 år (Voksen)

Tager imod sunde frivillige

Ja

Køn, der er berettiget til at studere

Alle

Beskrivelse

  • Inclusion Criteria for Schizophrenia Patients

    1. 18-64 year old males and females
    2. Smoking at least 10 cigarettes per day for at least 1 year
    3. Urinary cotinine level ≥ 100 ng/ml (NicAlert® reading ≥ 3)
    4. Current DSM-IV diagnosis of schizophrenia and stable medication regimen (see above)
    5. Medically healthy as determined by screening criteria

  • Inclusion Criteria for Healthy Volunteers

    1. 18-64 year old males and females
    2. Smoking at least 10 cigarettes per day for at least 1 year
    3. Urinary cotinine level ≥ 100 ng/ml (NicAlert® reading ≥ 3)
    4. Medically and psychologically healthy as determined by screening criteria

  • Exclusion Criteria for Schizophrenia Patients

    1. Current interest in reducing or quitting tobacco use
    2. Treatment for tobacco dependence in the past 3 months
    3. Use of nicotine replacement products, bupropion, or varenicline in the past 3 months
    4. Consumption of more than 15 alcoholic drinks per week during the past month
    5. Use of any illicit drug more than twice per week during the past month
    6. Current use of any medication that would interfere with the protocol in the opinion of MAI (e.g., medications that would interfere with the cue reactivity portion of the study including, but not limited to, antidepressants, first-generation antipsychotics, and mood stabilizers)
    7. Under the influence of a drug or alcohol at experimental sessions
    8. Pregnant, nursing, or become pregnant during the study

  • Exclusion Criteria for Healthy Volunteers

    1. Current interest in reducing or quitting tobacco use
    2. Treatment for tobacco dependence in the past 3 months
    3. Use of nicotine replacement products, bupropion, or varenicline in the past 3 months
    4. Consumption of more than 15 alcoholic drinks per week during the past month
    5. Use of any illicit drug more than twice per week during the past month
    6. Current use of any medication that would interfere with the protocol in the opinion of MAI (e.g., medications that would interfere with the cue reactivity portion of the study including, but not limited to, antidepressants, antipsychotics, and mood stabilizers)
    7. Under the influence of a drug or alcohol at experimental sessions
    8. Pregnant, nursing, or become pregnant during 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
  • Interventionel model: Crossover opgave
  • Maskning: Enkelt

Våben og indgreb

Deltagergruppe / Arm
Intervention / Behandling
Eksperimentel: Cues
Outcome Measures During cue trials, primary measures include craving (TCQ-SF, VAS), mood (mood form, VAS), and autonomic (heart rate, blood pressure, skin conductance and temperature) responsivity. During self-administration trials, primary measures include breakpoint (final ratio completed), total number of responses, and number of cigarette puffs earned and taken. Secondary measures include baseline smoking history, mood form, TCQ-SF, CO, FTND, and urinary cotinine and 3-hydroxycotinine (3-HC).
Adfærdsmæssigt: Smoking Cues
In the smoking cue condition, a pack of the participants preferred brand of cigarettes, a lighter, and an ashtray will be under the tray cover. In the neutral cue condition, a pack of unsharpened pencils, a pencil sharpener, and a small notepad will be under the cover. When instructed, the participant will lift the cover on the tray. In the smoking cue condition, participants will take one cigarette out of the pack, light it without puffing, hold it for 1 minute, extinguish the cigarette, and replace the cover on the tray.
Adfærdsmæssigt: Neutral Cues
In the neutral cue condition, participants will take one pencil out of the pack, sharpen it, hold it for 1 minute as if to write on the notepad, and then replace the cover. Participants will complete the VAS during cue exposure and the TCQ-SF, VAS, and mood form immediately and 15 minutes after cue presentation; physiological measures will be recorded continuously.

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Tidsramme
To compare the effects of smoking versus neutral cues on craving, mood, and autonomic responsivity in smokers with schizophrenia and smokers without schizophrenia.
Tidsramme: 7-10 Days
7-10 Days

Samarbejdspartnere og efterforskere

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

Sponsor

University of Maryland, Baltimore

Samarbejdspartnere

National Institute on Drug Abuse (NIDA)

Efterforskere

  • Ledende efterforsker: Stephen J Heishman, Ph.D., National Institute on Drug Abuse (NIDA)
  • Ledende efterforsker: Deanna L Kelly, Pharm.D, BCPP, University of Maryland, College Park

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)

1. oktober 2008

Primær færdiggørelse (Faktiske)

1. december 2010

Studieafslutning (Faktiske)

1. december 2010

Datoer for studieregistrering

Først indsendt

7. oktober 2008

Først indsendt, der opfyldte QC-kriterier

8. oktober 2008

Først opslået (Skøn)

9. oktober 2008

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Faktiske)

19. august 2019

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

15. august 2019

Sidst verificeret

1. august 2019

Mere information

Begreber relateret til denne undersøgelse

Nøgleord

Yderligere relevante MeSH-vilkår

Andre undersøgelses-id-numre

  • HP-00042356
  • NIDA 430

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 Smoking Cues

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Sponsorer og samarbejdspartnere

Medicinske tilstande

Narkotikainterventioner

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Betingelser

Sjældne sygdomme

Narkotikainterventioner

Kosttilskud

Sponsor / samarbejdspartnere

Placeringer

Abonner