- ICH GCP
- US-Register für klinische Studien
- Klinische Studie NCT05205382
Bewertung der Auswirkung der Nikotinreduzierung auf die Sucht und Exposition des ENDS-Benutzers
Studienübersicht
Status
Bedingungen
Detaillierte Beschreibung
Der Gebrauch elektronischer Nikotinabgabesysteme (ENDS oder E-Zigaretten) hat bei jungen Menschen in den Vereinigten Staaten epidemische Ausmaße angenommen. ENDS geben giftige Substanzen ab, darunter Nikotin, das das sich entwickelnde Gehirn irreversibel beeinträchtigt und zu Abhängigkeit und einem erhöhten Risiko für den Beginn des Zigarettenrauchens führt. Es gibt Hinweise darauf, dass junge Menschen, die ENDS konsumieren, den Konsum wahrscheinlich beschleunigen und nikotinabhängig werden. Einige der beliebtesten ENDS bei Jugendlichen (z. B. JUUL mit 5 % Nikotinflüssigkeit) liefern in einer Kartusche eine Nikotindosis, die einer ganzen Packung Zigaretten entspricht, und viele Benutzer sind sich dieser erheblichen Belastung und der damit verbundenen Suchtgefahr nicht bewusst. Andererseits wird die Nikotinreduzierung (NR) von der US-amerikanischen Food and Drug Administration (FDA) als wichtige Strategie zur Begrenzung der Suchtgefahr und des Konsums von Tabakprodukten angesehen.
Da die FDA nun ENDS im Rahmen der „Deeming Rule“ reguliert, kann eine solche Strategie für diese neuen Tabakprodukte in Betracht gezogen werden. Allerdings fehlen den Forschern immer noch Belege für die erwarteten Auswirkungen einer Reihe von NR-Werten auf ENDS-Benutzer in verschiedenen Phasen des Nutzungsverlaufs. Unter Verwendung klinischer und analytischer Labormethoden planen die Forscher, unter 5 % Nikotin-ENDS-Konsumenten die Wirkung von teilweiser (3 %) oder vollständiger (nikotinfrei, 0 %) NR auf die Abhängigkeit, Zufriedenheit, klinische (z. B. Blutdruck, Oxymetrie, Lungenfunktionen, Symptome), Atemverhalten und Exposition gegenüber Giftstoffen. Die Forscher werden aktuelle ENDS-Benutzer (n=120; 21–35 Jahre) für eine 2X2-interne themenübergreifende Laborstudie rekrutieren. Die Nikotinbedingungen (5 %, 3 %) oder (0 %, 5 %) x 2 Mal (vorher nachher) sind die subjektinternen Faktoren.
Daher ist die Studie in zwei Teile unterteilt, wobei der erste Teil ein 2x2-Vergleich von NJOY 5 % und 3 % sein wird, um die Auswirkungen einer teilweisen Nikotinreduzierung zu testen, und der zweite Teil die Verwendung der NIDA Standardized Research Electronic Cigarette (SREC) zum Einsatz bringt Klinische Forschung 5 % und 0 % (Placebo), um die Wirkung der Gesamtreduktion mit denselben Schoten und Säften desselben Herstellers zu testen.
Die Forscher gehen davon aus, dass NR mit geringerer Zufriedenheit, Entzugsunterdrückung und Konsumabsicht einhergeht und dass ein solcher Effekt insgesamt ausgeprägter sein wird als bei partiellem NR und bei Nutzern mit hoher Abhängigkeit im Vergleich zu Nutzern mit geringer Abhängigkeit. Die vorgeschlagenen Studien zielen darauf ab, drei wichtige regulatorische Fragen zu beantworten: 1) Ist NR eine vielversprechende regulatorische Option, um die Abhängigkeit und den Konsum von ENDS zu reduzieren? 2) Wie wirkt sich partielles bzw. vollständiges NR auf das kompensatorische Rauchen und die Exposition gegenüber Nikotin und Atemgiften aus und 3) welche Auswirkungen hat NR auf ENDS-Benutzer in verschiedenen Phasen ihres Konsums? Zusammengenommen werden diese Studien direkte und standardisierte Beweise für das Potenzial von NR-Vorschriften liefern, die Suchtgefahr und den Gebrauch von ENDS zu begrenzen und dabei zu helfen, mögliche Nebenwirkungen von NR auf die Exposition von ENDS-Benutzern gegenüber schädlichen Giftstoffen vorherzusagen.
Studientyp
Einschreibung (Tatsächlich)
Phase
- Unzutreffend
Kontakte und Standorte
Studienorte
-
-
Florida
-
Miami, Florida, Vereinigte Staaten, 33199
- Florida International University
-
-
Teilnahmekriterien
Zulassungskriterien
Studienberechtigtes Alter
Akzeptiert gesunde Freiwillige
Beschreibung
Einschlusskriterien:
- Im Allgemeinen gesunde Personen (bestimmt durch körperliche Untersuchung).
- Alter von 21-35 Jahren.
- Ist bereit, eine Einverständniserklärung abzugeben.
- Ist bereit, im Rahmen des Studienprotokolls am Labor teilzunehmen.
- Benutzer elektronischer Zigaretten (definiert als täglicher oder gelegentlicher Konsum elektronischer Zigaretten in den letzten 30 Tagen)
- Sie haben vor jeder Sitzung 12 Stunden lang auf den Konsum elektronischer Zigaretten verzichtet
Ausschlusskriterien:
- Geben Sie an, regelmäßig Zigaretten zu rauchen (> 5 Zigaretten/Monat im vergangenen Jahr).
- Berichten Sie über den regelmäßigen Konsum anderer Tabak-/Nikotinprodukte (z. B. Wasserpfeifen, Pfeifen, Zigarren) im vergangenen Jahr.
- Frauen, die stillen oder positiv auf eine Schwangerschaft getestet wurden (durch Urinanalyse beim Screening).
- Personen mit selbstberichteten chronischen Erkrankungen oder aktuellen psychiatrischen Erkrankungen.
- Personen mit einer Vorgeschichte oder einer aktiven Herz-Kreislauf-Erkrankung, niedrigem oder hohem Blutdruck, Krampfanfällen und der regelmäßigen Einnahme verschreibungspflichtiger Medikamente (außer Vitaminen oder Verhütungsmitteln).
- Personen, die über das Rauchen/Dampfen von THC (Marihuana) berichten.
- Personen, die die Verwendung von nichtkommerziellen (d. h. auf der Straße erhältlichen) E-Zigaretten-Flüssigkeiten oder -Produkten melden
- Personen, die über aktuelle EVALI- oder COVID-19-bezogene Symptome berichten (z. B. Husten, Kurzatmigkeit, Brustschmerzen, Übelkeit, Erbrechen, Bauchschmerzen, Durchfall, Fieber, Schüttelfrost oder Gewichtsverlust)
- Personen, die in den letzten 14 Tagen COVID-19 ausgesetzt waren oder waren.
Studienplan
Wie ist die Studie aufgebaut?
Designdetails
- Hauptzweck: Verhütung
- Zuteilung: Zufällig
- Interventionsmodell: Crossover-Aufgabe
- Maskierung: Keine (Offenes Etikett)
Waffen und Interventionen
Teilnehmergruppe / Arm |
Intervention / Behandlung |
|---|---|
|
Experimental: 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.
|
Partial Nicotine Reduction: Effects of e-cigarette pods (JUUL/NJOY) with 5% nicotine concentration nicotine concentration
|
|
Experimental: 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.
|
Partial Nicotine Reduction: Effects of e-cigarette pods (JUUL/NJOY) with 3% or 2.4% nicotine concentration
|
|
Experimental: 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.
|
Total Nicotine Reduction: Effects of e-cigarette pods (SREC) with 5% nicotine concentration
|
|
Experimental: 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.
|
Total Nicotine Reduction: Effects of e-cigarette pods (SREC) with 0% nicotine concentration nicotine concentration
|
Was misst die Studie?
Primäre Ergebnismessungen
Ergebnis Maßnahme |
Maßnahmenbeschreibung |
Zeitfenster |
|---|---|---|
|
Plasma Nicotine Boost
Zeitfenster: During the 2 participant visits, blood was taken 2 times in each session: before and after approximately 60 minutes ad lib use.
|
Change in plasma nicotine level.
The plasma nicotine boost was calculated by subtracting the preplasma nicotine value from the postplasma value.
|
During the 2 participant visits, blood was taken 2 times in each session: before and after approximately 60 minutes ad lib use.
|
Sekundäre Ergebnismessungen
Ergebnis Maßnahme |
Maßnahmenbeschreibung |
Zeitfenster |
|---|---|---|
|
Puff Topography (Total Puffing Time)
Zeitfenster: During participants' 2 study visits. Puffing behavior is continuously measured during each electronic cigarette use session (an approximately 60 minutes ad lib use period)
|
Measurement of puffing behavior in total puffing time
|
During participants' 2 study visits. Puffing behavior is continuously measured during each electronic cigarette use session (an approximately 60 minutes ad lib use period)
|
|
Puff Topography (Average Puff Duration)
Zeitfenster: During participants' 2 study visits. Puffing behavior is continuously measured during each electronic cigarette use session (an approximately 60 minutes ad lib use period)
|
Measurement of puffing behavior in average puffing duration
|
During participants' 2 study visits. Puffing behavior is continuously measured during each electronic cigarette use session (an approximately 60 minutes ad lib use period)
|
|
Puff Topography (Puff Number)
Zeitfenster: During participants' 2 study visits. Puffing behavior is continuously measured during each electronic cigarette use session (an approximately 60 minutes ad lib use period)
|
Measurement of puffing behavior; mean of the number of puffs taken during the ad-libitum smoking session
|
During participants' 2 study visits. Puffing behavior is continuously measured during each electronic cigarette use session (an approximately 60 minutes ad lib use period)
|
|
Puff Topography (Inhaled Volume)
Zeitfenster: During participants' 2 study visits. Puffing behavior is continuously measured during each electronic cigarette use session (an approximately 60 minutes ad lib use period)
|
Measurement of puffing behavior; mean volume of puffs inhaled during the ad-libitum smoking session
|
During participants' 2 study visits. Puffing behavior is continuously measured during each electronic cigarette use session (an approximately 60 minutes ad lib use period)
|
|
Toxicants (Carcinogenic and Probably or Possibly Carcinogenic) Exposure
Zeitfenster: 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.
|
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.
|
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.
|
|
TPM (Total Particular Matter) Exposure
Zeitfenster: 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.
|
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.
|
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.
|
|
Lung Function Tests (LFTs) Change
Zeitfenster: 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
|
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.
|
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
|
|
Lung Function Tests (LFTs) (% Predicted Change)
Zeitfenster: 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
|
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.
|
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
|
|
Minnesota Nicotine Withdrawal Scale (MNWS)
Zeitfenster: 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
|
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
|
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
|
|
Tiffany-Drobes Questionnaire of Smoking Urges (QSU)
Zeitfenster: 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
|
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
|
|
Duke Sensory Questionnaire (DSQ)
Zeitfenster: 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
|
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).
|
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
|
|
Modified Cigarette Evaluation Questionnaire (mCEQ)
Zeitfenster: 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
|
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
|
|
Visual Analogue Scale (VAS)
Zeitfenster: 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
|
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).
|
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
|
Andere Ergebnismessungen
Ergebnis Maßnahme |
Maßnahmenbeschreibung |
Zeitfenster |
|---|---|---|
|
Heart Rate
Zeitfenster: During participants' 2 study visits. Heat rate will be measured from baseline and subsequently every 10 minutes until end of vaping session.
|
Change in heart rate, measured in beats per minute (bpm).
|
During participants' 2 study visits. Heat rate will be measured from baseline and subsequently every 10 minutes until end of vaping session.
|
|
Blood Pressure (Systolic)
Zeitfenster: During participants' 2 study visits. Blood pressure will be measured from baseline and subsequently every 10 minutes until end of vaping session.
|
Change in systolic blood pressure, measured in mm/hg.
|
During participants' 2 study visits. Blood pressure will be measured from baseline and subsequently every 10 minutes until end of vaping session.
|
|
Blood Pressure (Diastolic)
Zeitfenster: During participants' 2 study visits. Blood pressure will be measured from baseline and subsequently every 10 minutes until end of vaping session.
|
Change in diastolic blood pressure, measured in mm/hg.
|
During participants' 2 study visits. Blood pressure will be measured from baseline and subsequently every 10 minutes until end of vaping session.
|
Mitarbeiter und Ermittler
Sponsor
Ermittler
- Hauptermittler: Wasim Maziak, PhD, MD, Florida International University
Publikationen und hilfreiche Links
Allgemeine Veröffentlichungen
- 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.
Studienaufzeichnungsdaten
Haupttermine studieren
Studienbeginn (Tatsächlich)
Primärer Abschluss (Tatsächlich)
Studienabschluss (Tatsächlich)
Studienanmeldedaten
Zuerst eingereicht
Zuerst eingereicht, das die QC-Kriterien erfüllt hat
Zuerst gepostet (Tatsächlich)
Studienaufzeichnungsaktualisierungen
Letztes Update gepostet (Tatsächlich)
Letztes eingereichtes Update, das die QC-Kriterien erfüllt
Zuletzt verifiziert
Mehr Informationen
Begriffe im Zusammenhang mit dieser Studie
Schlüsselwörter
Zusätzliche relevante MeSH-Bedingungen
Andere Studien-ID-Nummern
- R01DA053587 (US NIH Stipendium/Vertrag)
Plan für individuelle Teilnehmerdaten (IPD)
Planen Sie, individuelle Teilnehmerdaten (IPD) zu teilen?
Arzneimittel- und Geräteinformationen, Studienunterlagen
Studiert ein von der US-amerikanischen FDA reguliertes Arzneimittelprodukt
Studiert ein von der US-amerikanischen FDA reguliertes Geräteprodukt
Diese Informationen wurden ohne Änderungen direkt von der Website clinicaltrials.gov abgerufen. Wenn Sie Ihre Studiendaten ändern, entfernen oder aktualisieren möchten, wenden Sie sich bitte an register@clinicaltrials.gov. Sobald eine Änderung auf clinicaltrials.gov implementiert wird, wird diese automatisch auch auf unserer Website aktualisiert .