- ICH GCP
- Registro de ensaios clínicos dos EUA
- Ensaio Clínico NCT05205382
Avaliação do efeito da redução de nicotina na dependência e exposição de usuários de SINA
Visão geral do estudo
Status
Condições
Descrição detalhada
O uso de sistemas eletrônicos de entrega de nicotina (ENDS ou e-cigarettes) atingiu níveis epidêmicos entre jovens nos Estados Unidos (EUA). Os ENDS emitem substâncias tóxicas, incluindo a nicotina, que afeta irreversivelmente o cérebro em desenvolvimento e leva à dependência e aumenta o risco de iniciação ao tabagismo. As evidências indicam que os jovens que usam ENDS provavelmente aceleram o uso e se tornam dependentes da nicotina. Alguns dos ENDS mais populares entre os jovens (p. JUUL com 5% de nicotina líquida) fornecem em um cartucho uma dose de nicotina igual a um maço inteiro de cigarros, e muitos usuários desconhecem essa exposição substancial e o risco de dependência relacionado. Por outro lado, a redução de nicotina (NR) tem sido considerada pela Food and Drug Administration (FDA) dos Estados Unidos como uma importante estratégia para limitar a dependência e o uso de produtos derivados do tabaco.
Agora que o FDA regulamenta o ENDS sob a "regra de julgamento", tal estratégia pode ser considerada para esses produtos de tabaco emergentes. No entanto, os investigadores ainda carecem de evidências sobre os efeitos esperados de uma variedade de níveis de NR em usuários de SEND em diferentes estágios da trajetória de uso. Usando métodos laboratoriais clínicos e analíticos, os investigadores planejam comparar entre usuários de SEAN com 5% de nicotina o efeito da NR parcial (3%) ou total (sem nicotina, 0%) na dependência, satisfação, clínica (p. PA, oximetria, funções pulmonares, sintomas), comportamento de inalação e exposição a substâncias tóxicas. Os investigadores irão recrutar usuários atuais de ENDS (n = 120; 21-35 anos), para um estudo de laboratório 2X2 dentro do sujeito cruzado. As condições de nicotina (5%, 3%) ou (0%,5%) x 2 vezes (pré-pós) são os fatores dentro do sujeito.
Portanto, o estudo é dividido em 2 partes, sendo que a primeira parte será 2x2 comparando NJOY 5% e 3% para testar os efeitos da redução parcial da nicotina, e a segunda parte usará o NIDA Standardized Research Electronic Cigarette (SREC) para Clinical Research 5% e 0% (placebo), para testar o efeito da redução total usando as mesmas cápsulas e sucos do mesmo fabricante.
Os investigadores levantam a hipótese de que o NR estará associado a menos satisfação, supressão da abstinência e intenção de usar e que tal efeito será mais pronunciado no total em comparação com o NR parcial e entre os usuários de alta em comparação com os de baixa dependência. Os estudos propostos visam responder a 3 questões regulatórias principais: 1) a NR é uma opção regulatória promissora para reduzir a dependência e o uso de SNE; 2) qual é o efeito da NR parcial vs. total na tragada compensatória e exposição à nicotina e tóxicos respiratórios, e 3) qual é o efeito da NR em usuários de SEAN em diferentes estágios de uso. Combinados, esses estudos fornecerão evidências diretas e padronizadas sobre o potencial dos regulamentos de NR para limitar a dependência e o uso de ENDS e para ajudar a prever quaisquer efeitos colaterais potenciais de NR na exposição dos usuários de ENDS a substâncias tóxicas nocivas.
Tipo de estudo
Inscrição (Real)
Estágio
- Não aplicável
Contactos e Locais
Locais de estudo
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Florida
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Miami, Florida, Estados Unidos, 33199
- Florida International University
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Critérios de participação
Critérios de elegibilidade
Idades elegíveis para estudo
Aceita Voluntários Saudáveis
Descrição
Critério de inclusão:
- Indivíduos geralmente saudáveis (determinados por exame físico).
- Idade de 21-35 anos.
- Está disposto a fornecer consentimento informado.
- Está disposto a comparecer ao laboratório conforme exigido pelo protocolo do estudo.
- Usuários de cigarro eletrônico (definido como o uso diário ou ocasional de cigarro eletrônico nos últimos 30 dias)
- Ter se abstido do uso de cigarro eletrônico por 12 horas antes de cada sessão
Critério de exclusão:
- Relata fumar cigarros regularmente (> 5 cigarros/mês no último ano).
- Relate o uso regular de qualquer outro produto de tabaco/nicotina (por exemplo, narguilé, cachimbos, charutos) no último ano.
- Mulheres que estão amamentando ou com teste positivo para gravidez (por exame de urina na triagem).
- Indivíduos com história autorreferida de doença crônica ou condições psiquiátricas atuais.
- Indivíduos com histórico ou doença cardiovascular ativa, pressão arterial baixa ou alta, convulsões e uso regular de medicamentos prescritos (exceto vitaminas ou anticoncepcionais).
- Indivíduos que relatam fumar/vaping de THC (maconha).
- Indivíduos que relatam o uso de líquidos ou produtos não comerciais (ou seja, de rua) para cigarros eletrônicos
- Indivíduos que relatam sintomas atuais relacionados ao EVALI ou COVID-19 (ou seja, tosse, falta de ar, dor no peito, náusea, vômito, dor abdominal, diarreia, febre, calafrios ou perda de peso)
- Indivíduos que tiveram ou foram expostos ao COVID-19 nos últimos 14 dias.
Plano de estudo
Como o estudo é projetado?
Detalhes do projeto
- Finalidade Principal: Prevenção
- Alocação: Randomizado
- Modelo Intervencional: Atribuição cruzada
- Mascaramento: Nenhum (rótulo aberto)
Armas e Intervenções
Grupo de Participantes / Braço |
Intervenção / Tratamento |
|---|---|
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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.
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Partial Nicotine Reduction: Effects of e-cigarette pods (JUUL/NJOY) with 5% nicotine concentration nicotine concentration
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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.
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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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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.
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Total Nicotine Reduction: Effects of e-cigarette pods (SREC) with 5% nicotine concentration
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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.
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Total Nicotine Reduction: Effects of e-cigarette pods (SREC) with 0% nicotine concentration nicotine concentration
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O que o estudo está medindo?
Medidas de resultados primários
Medida de resultado |
Descrição da medida |
Prazo |
|---|---|---|
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Plasma Nicotine Boost
Prazo: 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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Medidas de resultados secundários
Medida de resultado |
Descrição da medida |
Prazo |
|---|---|---|
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Puff Topography (Total Puffing Time)
Prazo: 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)
Prazo: 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)
Prazo: 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)
Prazo: 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
Prazo: 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.
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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
Prazo: 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.
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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
Prazo: 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)
Prazo: 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.
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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)
Prazo: 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)
Prazo: 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)
Prazo: 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).
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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)
Prazo: 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
|
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Visual Analogue Scale (VAS)
Prazo: 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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Outras medidas de resultado
Medida de resultado |
Descrição da medida |
Prazo |
|---|---|---|
|
Heart Rate
Prazo: 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)
Prazo: 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)
Prazo: 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.
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Colaboradores e Investigadores
Patrocinador
Investigadores
- Investigador principal: Wasim Maziak, PhD, MD, Florida International University
Publicações e links úteis
Publicações Gerais
- 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.
Datas de registro do estudo
Datas Principais do Estudo
Início do estudo (Real)
Conclusão Primária (Real)
Conclusão do estudo (Real)
Datas de inscrição no estudo
Enviado pela primeira vez
Enviado pela primeira vez que atendeu aos critérios de CQ
Primeira postagem (Real)
Atualizações de registro de estudo
Última Atualização Postada (Real)
Última atualização enviada que atendeu aos critérios de controle de qualidade
Última verificação
Mais Informações
Termos relacionados a este estudo
Palavras-chave
Termos MeSH relevantes adicionais
Outros números de identificação do estudo
- R01DA053587 (Concessão/Contrato do NIH dos EUA)
Plano para dados de participantes individuais (IPD)
Planeja compartilhar dados de participantes individuais (IPD)?
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