- ICH GCP
- US Clinical Trials Registry
- Klinisk utprøving NCT05205382
Vurdere effekten av nikotinreduksjon på ENDS-brukerens avhengighet og eksponeringer
Studieoversikt
Status
Forhold
Detaljert beskrivelse
Bruken av elektroniske nikotinleveringssystemer (ENDS eller e-sigaretter) har nådd epidemiske nivåer blant unge mennesker i USA (USA). ENDS avgir giftige stoffer, inkludert nikotin som irreversibelt påvirker den utviklende hjernen og fører til avhengighet og økt risiko for initiering av sigarettrøyking. Bevis tyder på at unge mennesker som bruker ENDS sannsynligvis vil fremskynde bruken og bli nikotinavhengige. Noen av de mest populære ENDENE blant ungdom (f.eks. JUUL med 5 % nikotinvæske) leverer i én patron en nikotindose som tilsvarer en hel pakke sigaretter, og mange brukere er uvitende om denne betydelige eksponeringen og den relaterte risikoen for avhengighet. På den annen side har nikotinreduksjon (NR) blitt vurdert av US Food and Drug Administration (FDA) som en viktig strategi for å begrense avhengighet og bruk av tobakksprodukter.
Nå som FDA regulerer ENDS under "deeming rule", kan en slik strategi vurderes for disse nye tobakksproduktene. Imidlertid mangler etterforskerne fortsatt bevis på de forventede effektene av en rekke NR-nivåer på ENDS-brukere på forskjellige stadier av bruksbanen. Ved å bruke kliniske og analytiske laboratoriemetoder planlegger etterforskerne å sammenligne blant 5 % nikotin ENDS-brukere effekten av delvis (3 %) eller total (nikotinfri, 0 %) NR på brukernes avhengighet, tilfredshet, kliniske (f.eks. BP, oksymetri, lungefunksjoner, symptomer), oppblåsthet og eksponering for giftstoffer. Etterforskerne vil rekruttere nåværende ENDS-brukere (n=120; 21-35 år), for en 2X2-studie innen subjektet crossover-lab. Nikotinforholdene (5 %, 3 %) eller (0 %, 5 %) x 2 ganger (pre-post) er de interne faktorene.
Derfor er studien delt inn i 2 deler, hvor den første delen vil være 2x2 som sammenligner NJOY 5% og 3% for å teste effekten av delvis nikotinreduksjon, og den andre delen vil bruke NIDA Standardized Research Electronic Cigarette (SREC) for Clinical Research 5 % og 0 % (placebo), for å teste effekten av den totale reduksjonen ved å bruke de samme belgene og juicene fra samme produsent.
Etterforskerne antar at NR vil være assosiert med mindre tilfredshet, abstinensundertrykkelse og intensjon om å bruke, og at en slik effekt vil være mer uttalt totalt sett sammenlignet med delvis NR og blant høy sammenlignet med lavavhengige brukere. De foreslåtte studiene tar sikte på å svare på 3 regulatoriske hovedspørsmål: 1) er NR et lovende regulatorisk alternativ for å redusere ENDS avhengighet og bruk; 2) hva er effekten av delvis vs. total NR på kompenserende pust og eksponering for nikotin og luftveisgifter, og 3) hva er effekten av NR på ENDS-brukere på ulike stadier av bruken. Kombinert vil disse studiene gi direkte og standardiserte bevis på potensialet til NR-forskrifter for å begrense avhengighetsskapen og bruken av ENDS, og for å hjelpe til med å forutsi potensielle bivirkninger av NR på ENDS-brukeres eksponering for skadelige giftstoffer.
Studietype
Registrering (Faktiske)
Fase
- Ikke aktuelt
Kontakter og plasseringer
Studiesteder
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Florida
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Miami, Florida, Forente stater, 33199
- Florida International University
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Deltakelseskriterier
Kvalifikasjonskriterier
Alder som er kvalifisert for studier
Tar imot friske frivillige
Beskrivelse
Inklusjonskriterier:
- Generelt friske individer (bestemt ved fysisk undersøkelse).
- Alder 21-35 år.
- Er villig til å gi informert samtykke.
- Er villig til å delta på laboratoriet som kreves av studieprotokollen.
- Brukere av elektronisk sigarett (definert som bruk av elektronisk sigarett enten daglig eller av og til i løpet av de siste 30 dagene)
- Har avstått fra bruk av elektronisk sigarett i 12 timer før hver økt
Ekskluderingskriterier:
- Rapporter regelmessig røyking av sigaretter (> 5 sigaretter/mnd siste år).
- Rapporter regelmessig bruk av andre tobakks-/nikotinprodukter (f.eks. vannpipe, piper, sigarer) det siste året.
- Kvinner som ammer eller tester positivt for graviditet (ved urinanalyse ved screening).
- Personer med selvrapportert historie med kronisk sykdom eller nåværende psykiatriske tilstander.
- Personer med tidligere eller aktiv kardiovaskulær sykdom, lavt eller høyt blodtrykk, anfall og regelmessig bruk av reseptbelagte medisiner (annet enn vitaminer eller prevensjon).
- Personer som rapporterer nåværende THC (marihuana) røyking/damping.
- Personer som rapporterer bruk av ikke-kommersiell (dvs. gate) e-sigarettvæske eller produkter
- Personer som rapporterer aktuelle EVALI- eller COVID-19-relaterte symptomer (dvs. hoste, kortpustethet, brystsmerter, kvalme, oppkast, magesmerter, diaré, feber, frysninger eller vekttap)
- Personer som har eller har vært utsatt for covid-19 i løpet av de siste 14 dagene.
Studieplan
Hvordan er studiet utformet?
Designdetaljer
- Primært formål: Forebygging
- Tildeling: Randomisert
- Intervensjonsmodell: Crossover-oppdrag
- Masking: Ingen (Open Label)
Våpen og intervensjoner
Deltakergruppe / Arm |
Intervensjon / Behandling |
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Eksperimentell: 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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Eksperimentell: 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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Eksperimentell: 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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Eksperimentell: 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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Hva måler studien?
Primære resultatmål
Resultatmål |
Tiltaksbeskrivelse |
Tidsramme |
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Plasma Nicotine Boost
Tidsramme: 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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Sekundære resultatmål
Resultatmål |
Tiltaksbeskrivelse |
Tidsramme |
|---|---|---|
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Puff Topography (Total Puffing Time)
Tidsramme: 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)
Tidsramme: 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)
Tidsramme: 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)
Tidsramme: 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
Tidsramme: 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
Tidsramme: 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
Tidsramme: 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)
Tidsramme: 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)
Tidsramme: 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)
Tidsramme: 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)
Tidsramme: 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)
Tidsramme: 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)
Tidsramme: 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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Andre resultatmål
Resultatmål |
Tiltaksbeskrivelse |
Tidsramme |
|---|---|---|
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Heart Rate
Tidsramme: 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)
Tidsramme: 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)
Tidsramme: 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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Samarbeidspartnere og etterforskere
Sponsor
Etterforskere
- Hovedetterforsker: Wasim Maziak, PhD, MD, Florida International University
Publikasjoner og nyttige lenker
Generelle publikasjoner
- 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.
Studierekorddatoer
Studer hoveddatoer
Studiestart (Faktiske)
Primær fullføring (Faktiske)
Studiet fullført (Faktiske)
Datoer for studieregistrering
Først innsendt
Først innsendt som oppfylte QC-kriteriene
Først lagt ut (Faktiske)
Oppdateringer av studieposter
Sist oppdatering lagt ut (Faktiske)
Siste oppdatering sendt inn som oppfylte QC-kriteriene
Sist bekreftet
Mer informasjon
Begreper knyttet til denne studien
Nøkkelord
Ytterligere relevante MeSH-vilkår
Andre studie-ID-numre
- R01DA053587 (U.S. NIH-stipend/kontrakt)
Plan for individuelle deltakerdata (IPD)
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