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- Klinische proef NCT05205382
Beoordeling van het effect van nicotinevermindering op de verslaving en blootstelling van ENDS-gebruikers
Studie Overzicht
Toestand
Conditie
Gedetailleerde beschrijving
Het gebruik van elektronische nicotineafgiftesystemen (ENDS of e-sigaretten) heeft epidemische niveaus bereikt onder jongeren in de Verenigde Staten (VS). ENDS stoten giftige stoffen uit, waaronder nicotine, die de zich ontwikkelende hersenen onomkeerbaar aantasten en leiden tot afhankelijkheid en een verhoogd risico op het beginnen met roken. Er zijn aanwijzingen dat jonge mensen die ENDS gebruiken, het gebruik waarschijnlijk versnellen en nicotineafhankelijk worden. Enkele van de meest populaire ENDS onder jongeren (bijv. JUUL met 5% nicotinevloeistof) leveren in één patroon een nicotinedosis die gelijk is aan een heel pakje sigaretten, en veel gebruikers zijn zich niet bewust van deze aanzienlijke blootstelling en het daarmee samenhangende risico op verslaving. Aan de andere kant wordt nicotinereductie (NR) door de Amerikaanse Food and Drug Administration (FDA) beschouwd als een belangrijke strategie om de verslavende werking en het gebruik van tabaksproducten te beperken.
Nu de FDA ENDS reguleert onder de "deeming rule", kan een dergelijke strategie worden overwogen voor deze opkomende tabaksproducten. De onderzoekers hebben echter nog steeds geen bewijs over de verwachte effecten van een reeks NR-niveaus op ENDS-gebruikers in verschillende stadia van het gebruikstraject. Met behulp van klinische en analytische laboratoriummethoden zijn de onderzoekers van plan om onder 5% nicotine ENDS-gebruikers het effect van gedeeltelijke (3%) of totale (nicotinevrij, 0%) NR op de afhankelijkheid, tevredenheid, klinische (bijv. bloeddruk, oximetrie, longfuncties, symptomen), puffend gedrag en blootstelling aan toxische stoffen. De onderzoekers zullen huidige ENDS-gebruikers (n=120; 21-35 jaar) rekruteren voor een 2X2 binnen subject crossover lab-onderzoek. De nicotinecondities (5%, 3%) of (0%,5%) x 2 keer (pre-post) zijn de factoren binnen het onderwerp.
Daarom is de studie opgedeeld in 2 delen, waarbij het eerste deel 2x2 zal zijn waarbij NJOY 5% en 3% worden vergeleken om de effecten van gedeeltelijke nicotinereductie te testen, en het tweede deel zal de NIDA Standardized Research Electronic Cigarette (SREC) gebruiken voor Clinical Research 5% en 0% (placebo), om het effect van de totale reductie te testen met dezelfde peulen en sappen van dezelfde fabrikant.
De onderzoekers veronderstellen dat NR geassocieerd zal zijn met minder tevredenheid, onderdrukking van ontwenning en intentie om te gebruiken en dat een dergelijk effect in totaal meer uitgesproken zal zijn in vergelijking met gedeeltelijke NR en bij gebruikers met een hoge in vergelijking met een lage afhankelijkheid. De voorgestelde studies zijn gericht op het beantwoorden van 3 belangrijke regelgevende vragen: 1) is NR een veelbelovende regelgevende optie om ENDS-verslaving en -gebruik te verminderen; 2) wat is het effect van gedeeltelijke vs. totale NR op compenserend puffen en blootstelling aan nicotine en respiratoire toxische stoffen, en 3) wat is het effect van NR op ENDS-gebruikers in verschillende stadia van hun gebruik. Gecombineerd zullen deze onderzoeken direct en gestandaardiseerd bewijs leveren over het potentieel van NR-regelgeving om de verslavende werking en het gebruik van ENDS te beperken, en om mogelijke bijwerkingen van NR op de blootstelling van ENDS-gebruikers aan schadelijke toxische stoffen te helpen voorspellen.
Studietype
Inschrijving (Werkelijk)
Fase
- Niet toepasbaar
Contacten en locaties
Studie Locaties
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Florida
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Miami, Florida, Verenigde Staten, 33199
- Florida International University
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Deelname Criteria
Geschiktheidscriteria
Leeftijden die in aanmerking komen voor studie
Accepteert gezonde vrijwilligers
Beschrijving
Inclusiecriteria:
- Over het algemeen gezonde personen (bepaald door lichamelijk onderzoek).
- Leeftijd van 21-35 jaar.
- Is bereid om geïnformeerde toestemming te geven.
- Is bereid om het laboratorium bij te wonen zoals vereist door het studieprotocol.
- Gebruikers van elektronische sigaretten (gedefinieerd als dagelijks of incidenteel gebruik van elektronische sigaretten in de afgelopen 30 dagen)
- Onthield zich van het gebruik van elektronische sigaretten gedurende 12 uur voorafgaand aan elke sessie
Uitsluitingscriteria:
- Meld regelmatig sigaretten te roken (> 5 sigaretten/maand in het afgelopen jaar).
- Meld regelmatig gebruik van andere tabaks-/nicotineproducten (bijv. waterpijp, pijpen, sigaren) in het afgelopen jaar.
- Vrouwen die borstvoeding geven of positief testen op zwangerschap (door urineonderzoek bij screening).
- Personen met een zelfgerapporteerde geschiedenis van chronische ziekte of huidige psychiatrische aandoeningen.
- Personen met een voorgeschiedenis van of actieve hart- en vaatziekten, lage of hoge bloeddruk, epileptische aanvallen en regelmatig gebruik van voorgeschreven medicijnen (anders dan vitamines of anticonceptie).
- Individuen die melden dat ze momenteel THC (marihuana) roken/vapen.
- Individuen die het gebruik van niet-commerciële (d.w.z. straat) e-sigarettenvloeistoffen of -producten melden
- Personen die huidige aan EVALI of COVID-19 gerelateerde symptomen melden (d.w.z. hoesten, kortademigheid, pijn op de borst, misselijkheid, braken, buikpijn, diarree, koorts, koude rillingen of gewichtsverlies)
- Personen die de afgelopen 14 dagen zijn of zijn blootgesteld aan COVID-19.
Studie plan
Hoe is de studie opgezet?
Ontwerpdetails
- Primair doel: Preventie
- Toewijzing: Gerandomiseerd
- Interventioneel model: Crossover-opdracht
- Masker: Geen (open label)
Wapens en interventies
Deelnemersgroep / Arm |
Interventie / Behandeling |
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Experimenteel: Partial Nicotine Reduction: Electronic cigarette pods with 5% nicotine concentration
For the partial nicotine reduction study, participants will complete a lab visit where they will use 5% nicotine electronic cigarette pods (JUUL/NJOY) ad libitum for up to 60 minutes.
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Partial Nicotine Reduction: Effects of e-cigarette pods (JUUL/NJOY) with 5% nicotine concentration nicotine concentration
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Experimenteel: Partial Nicotine Reduction: Electronic cigarette pods with 3% or 2.4% nicotine concentration
For the partial nicotine reduction study, participants will complete a lab visit where they will use 3% or 2.4% nicotine electronic cigarette pods (JUUL/NJOY) ad libitum for up to 60 minutes.
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Partial Nicotine Reduction: Effects of e-cigarette pods (JUUL/NJOY) with 3% or 2.4% nicotine concentration
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Experimenteel: Total Nicotine Reduction: Electronic cigarette pods with 5% nicotine concentration
For the total nicotine reduction study, participants will complete a lab visit where they will use 5% nicotine electronic cigarette pods (SREC) ad libitum for up to 60 minutes.
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Total Nicotine Reduction: Effects of e-cigarette pods (SREC) with 5% nicotine concentration
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Experimenteel: Total Nicotine Reduction: Electronic cigarette pods with 0% nicotine concentration
For the total nicotine reduction study, participants will complete a lab visit where they will use 0% nicotine electronic cigarette pods (SREC) ad libitum for up to 60 minutes.
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Total Nicotine Reduction: Effects of e-cigarette pods (SREC) with 0% nicotine concentration nicotine concentration
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Wat meet het onderzoek?
Primaire uitkomstmaten
Uitkomstmaat |
Maatregel Beschrijving |
Tijdsspanne |
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Plasma Nicotine Boost
Tijdsspanne: During the 2 participant visits, blood was taken 2 times in each session: before and after approximately 60 minutes ad lib use.
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Change in plasma nicotine level.
The plasma nicotine boost was calculated by subtracting the preplasma nicotine value from the postplasma value.
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During the 2 participant visits, blood was taken 2 times in each session: before and after approximately 60 minutes ad lib use.
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Secundaire uitkomstmaten
Uitkomstmaat |
Maatregel Beschrijving |
Tijdsspanne |
|---|---|---|
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Puff Topography (Total Puffing Time)
Tijdsspanne: During participants' 2 study visits. Puffing behavior is continuously measured during each electronic cigarette use session (an approximately 60 minutes ad lib use period)
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Measurement of puffing behavior in total puffing time
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During participants' 2 study visits. Puffing behavior is continuously measured during each electronic cigarette use session (an approximately 60 minutes ad lib use period)
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Puff Topography (Average Puff Duration)
Tijdsspanne: During participants' 2 study visits. Puffing behavior is continuously measured during each electronic cigarette use session (an approximately 60 minutes ad lib use period)
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Measurement of puffing behavior in average puffing duration
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During participants' 2 study visits. Puffing behavior is continuously measured during each electronic cigarette use session (an approximately 60 minutes ad lib use period)
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Puff Topography (Puff Number)
Tijdsspanne: During participants' 2 study visits. Puffing behavior is continuously measured during each electronic cigarette use session (an approximately 60 minutes ad lib use period)
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Measurement of puffing behavior; mean of the number of puffs taken during the ad-libitum smoking session
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During participants' 2 study visits. Puffing behavior is continuously measured during each electronic cigarette use session (an approximately 60 minutes ad lib use period)
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Puff Topography (Inhaled Volume)
Tijdsspanne: During participants' 2 study visits. Puffing behavior is continuously measured during each electronic cigarette use session (an approximately 60 minutes ad lib use period)
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Measurement of puffing behavior; mean volume of puffs inhaled during the ad-libitum smoking session
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During participants' 2 study visits. Puffing behavior is continuously measured during each electronic cigarette use session (an approximately 60 minutes ad lib use period)
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Toxicants (Carcinogenic and Probably or Possibly Carcinogenic) Exposure
Tijdsspanne: During the 2 participant visits for both trials (partial and total). Toxicant exposure was measured after an approximately 60 minutes ad lib electronic cigarette use period.
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This aim elucidates how compensatory puffing behavior in response to NR affects exposure to pulmonary toxicants.
The analytical assessments were conducted at the AUB Aerosol Research Laboratory (ARL) using the Aerosol Lab Vaping Instrument (ALVIN).
The ALVIN is programmed to playback participants' puffing behavior recorded during their two sessions (for both partial and total nicotine reduction studies) to generate and sample the e-cigarette aerosol for analysis.
The ARL is equipped with gas chromatographs with a flame ionization detector and a mass spectrometer (GC-FID, GC-MS), as well as and High-performance liquid chromatography Mass Spectrometry (HPLC-MS) for aldehydes analysis.
ARL optimized analytical methods have been used in several NIH-funded studies of ENDS nicotine and aldehydes emissions.
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During the 2 participant visits for both trials (partial and total). Toxicant exposure was measured after an approximately 60 minutes ad lib electronic cigarette use period.
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TPM (Total Particular Matter) Exposure
Tijdsspanne: During the 2 participant visits for both trials (partial and total). Total Particular Matter exposure was measured after an approximately 60 minutes ad lib electronic cigarette use period.
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This aim elucidates how compensatory puffing behavior in response to NR affects exposure to pulmonary toxicants.
The analytical assessments were conducted at the AUB Aerosol Research Laboratory (ARL) using the Aerosol Lab Vaping Instrument (ALVIN).
The ALVIN is programmed to playback participants' puffing behavior recorded during their two sessions (for both partial and total nicotine reduction studies) to generate and sample the e-cigarette aerosol for analysis.
The ARL is equipped with gas chromatographs with a flame ionization detector and a mass spectrometer (GC-FID, GC-MS), as well as and High-performance liquid chromatography Mass Spectrometry (HPLC-MS) for aldehydes analysis.
ARL optimized analytical methods have been used in several NIH-funded studies of ENDS nicotine and aldehydes emissions.
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During the 2 participant visits for both trials (partial and total). Total Particular Matter exposure was measured after an approximately 60 minutes ad lib electronic cigarette use period.
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Lung Function Tests (LFTs) Change
Tijdsspanne: During participants' 2 study visits. Lung function tests will be measured 2 times in each electronic cigarette use session: before and after an approximately 60 minutes ad lib use period
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LFTs (i.e., lung volume testing, airway resistance, specific airway conductance) will be measured before and immediately after ENDS use.
According to 2019 American Thoracic Society and European Respiratory Society recommendation simple spirometry (e.g., change in FVC and FEV1) will be performed.
Note: This outcome is not involved in multiple assessments since all the values will appear on the spirometry at the same time.
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During participants' 2 study visits. Lung function tests will be measured 2 times in each electronic cigarette use session: before and after an approximately 60 minutes ad lib use period
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Lung Function Tests (LFTs) (% Predicted Change)
Tijdsspanne: During participants' 2 study visits. Lung function tests will be measured 2 times in each electronic cigarette use session: before and after an approximately 60 minutes ad lib use period
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LFTs (i.e., lung volume testing, airway resistance, specific airway conductance) will be measured before and immediately after ENDS use.
According to 2019 American Thoracic Society and European Respiratory Society recommendation simple spirometry (e.g., % predicted value pred (FVC), FEV1 % pred FEV1/FVC, % pred) will be performed.
Note: This outcome is not involved in multiple assessments since all the values will appear on the spirometry at the same time.
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During participants' 2 study visits. Lung function tests will be measured 2 times in each electronic cigarette use session: before and after an approximately 60 minutes ad lib use period
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Minnesota Nicotine Withdrawal Scale (MNWS)
Tijdsspanne: During participants' 2 study visits. Questionnaire will be administered 2 times in each electronic cigarette use session: before and after an approximately 60 minutes ad lib use period
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Nicotine withdrawal symptoms were measured using the Minnesota Nicotine Withdrawal Scale (MNWS) before and after each vaping session.
MNWS evaluates 11 withdrawal-related symptoms, including depressed mood, irritability, restlessness, hunger, and difficulty concentrating, using scale from "0" (not at all) to "100" (extremely).
For each session and condition, change scores were calculated by subtracting pre-session from post-session scores for each individual item
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During participants' 2 study visits. Questionnaire will be administered 2 times in each electronic cigarette use session: before and after an approximately 60 minutes ad lib use period
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Tiffany-Drobes Questionnaire of Smoking Urges (QSU)
Tijdsspanne: During participants' 2 study visits. Questionnaire will be administered 2 times in each electronic cigarette use session: before and after an approximately 60 minutes ad lib use period
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The Tiffany-Drobes Questionnaire of Smoking Urges-Brief (QSU-Brief) is a 10-item self-report measure of cigarette craving and urge to smoke. It consists of two subscales representing distinct dimensions of craving: Factor 1 (Desire and Intention to Smoke): assesses desire, intention, and anticipation of pleasure associated with smoking. Factor 2 (Anticipation of Relief from Negative Affect and Withdrawal): assesses expectations that smoking will relieve withdrawal symptoms or negative affect. Each item is rated on a 7-point Likert scale ranging from 1 = strongly disagree to 7 = strongly agree. Subscale scores were calculated by averaging the items within each factor. Higher scores on either factor indicate greater smoking urge or craving, representing a worse outcome, whereas lower scores indicate lower craving or urge to smoke, representing a better outcome. Pre- to post-session change scores were calculated as pre-session score minus post-session score for each factor. |
During participants' 2 study visits. Questionnaire will be administered 2 times in each electronic cigarette use session: before and after an approximately 60 minutes ad lib use period
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Duke Sensory Questionnaire (DSQ)
Tijdsspanne: During participants' 2 study visits. Questionnaire will be administered after each of the 2 electronic cigarette use sessions. Each session is approximately 60 minutes ad lib use period
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This scale will assess participants sensory experience of the inhaled product.
The scale has nine items.
All items will be scored on a 7-point Likert scale anchored at the extremes (1= not at all; 7=extremely).
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During participants' 2 study visits. Questionnaire will be administered after each of the 2 electronic cigarette use sessions. Each session is approximately 60 minutes ad lib use period
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Modified Cigarette Evaluation Questionnaire (mCEQ)
Tijdsspanne: During participants' 2 study visits. Questionnaire will be administered after each of the 2 electronic cigarette use sessions. Each session is approximately 60 minutes ad lib use period
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Modified Cigarette Evaluation Questionnaire (mCEQ) is used to assess subjective effects associated with ENDS use. The 11-item questionnaire evaluates satisfaction, psychological reward, enjoyment of respiratory tract sensations, craving reduction and aversion. Individual item scores were reported (not subscales). Each item was rated using 7-point Likert scale; 1 = not at all to 7 = extremely. For all items, higher scores indicate greater endorsement of the measured subjective experience, while lower scores indicate less endorsement of that experience. The interpretation depends on the construct being measured: For items assessing satisfaction, enjoyment, psychological reward, sensory experiences, and craving reduction, higher scores indicate greater product reinforcement or abuse liability. For items assessing aversion, higher scores indicate greater unpleasant effects or product aversiveness. |
During participants' 2 study visits. Questionnaire will be administered after each of the 2 electronic cigarette use sessions. Each session is approximately 60 minutes ad lib use period
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Visual Analogue Scale (VAS)
Tijdsspanne: During participants' 2 study visits. Questionnaire will be administered after each of the 2 electronic cigarette use sessions. Each session is approximately 60 minutes ad lib use period
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This scale contains 10-item questions to assess users' pleasure and enjoyment using the validated Visual Analog Scale (VAS) post ENDS use sessions.
The scale includes items to assess user's desire, pleasure, satisfaction, future use, and other information rated on an analog scale (0 not at all to 100 extremely).
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During participants' 2 study visits. Questionnaire will be administered after each of the 2 electronic cigarette use sessions. Each session is approximately 60 minutes ad lib use period
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Andere uitkomstmaten
Uitkomstmaat |
Maatregel Beschrijving |
Tijdsspanne |
|---|---|---|
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Heart Rate
Tijdsspanne: During participants' 2 study visits. Heat rate will be measured from baseline and subsequently every 10 minutes until end of vaping session.
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Change in heart rate, measured in beats per minute (bpm).
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During participants' 2 study visits. Heat rate will be measured from baseline and subsequently every 10 minutes until end of vaping session.
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Blood Pressure (Systolic)
Tijdsspanne: During participants' 2 study visits. Blood pressure will be measured from baseline and subsequently every 10 minutes until end of vaping session.
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Change in systolic blood pressure, measured in mm/hg.
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During participants' 2 study visits. Blood pressure will be measured from baseline and subsequently every 10 minutes until end of vaping session.
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Blood Pressure (Diastolic)
Tijdsspanne: During participants' 2 study visits. Blood pressure will be measured from baseline and subsequently every 10 minutes until end of vaping session.
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Change in diastolic blood pressure, measured in mm/hg.
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During participants' 2 study visits. Blood pressure will be measured from baseline and subsequently every 10 minutes until end of vaping session.
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Medewerkers en onderzoekers
Sponsor
Onderzoekers
- Hoofdonderzoeker: Wasim Maziak, PhD, MD, Florida International University
Publicaties en nuttige links
Algemene publicaties
- Ferdous T, Roy S, Chowdhury S, Jebai R, Maya L, DeCaprio AP, Bursac Z, Maziak W. Partial Nicotine Reduction and E-Cigarette Users' Puffing Behaviors Among Adults Aged 21 to 35 Years: A Randomized Crossover Clinical Trial. JAMA Netw Open. 2024 Jul 1;7(7):e2422954. doi: 10.1001/jamanetworkopen.2024.22954.
- Roy S, Chowdhury S, Ferdous T, Shihadeh A, Salman R, El Hage R, Salam S, Bursac Z, Maziak W. Predicting nicotine emissions and plasma nicotine boost in E-cigarette users using machine learning. Sci Rep. 2026 Jun 13. doi: 10.1038/s41598-026-57341-4. Online ahead of print.
Studie record data
Bestudeer belangrijke data
Studie start (Werkelijk)
Primaire voltooiing (Werkelijk)
Studie voltooiing (Werkelijk)
Studieregistratiedata
Eerst ingediend
Eerst ingediend dat voldeed aan de QC-criteria
Eerst geplaatst (Werkelijk)
Updates van studierecords
Laatste update geplaatst (Werkelijk)
Laatste update ingediend die voldeed aan QC-criteria
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Meer informatie
Termen gerelateerd aan deze studie
Trefwoorden
Aanvullende relevante MeSH-voorwaarden
Andere studie-ID-nummers
- R01DA053587 (Subsidie/contract van de Amerikaanse NIH)
Plan Individuele Deelnemersgegevens (IPD)
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