Impact of Electronic Cigarette Temperature and Solvent on Biomarkers
24 maggio 2026 aggiornato da: Zachary Bitzer, Milton S. Hershey Medical Center
Clinical Study on the Impact of Electronic Cigarette Temperature and Solvent on Biomarkers of Oxidant Exposure
This project seeks to determine how e-cigarette (EC) physical design features, including those that allow the user to manipulate the quality and quantity of aerosols, affect exposure and toxicity from oxidants and other aerosol constituents.
Panoramica dello studio
Stato
Non ancora reclutamento
Descrizione dettagliata
Subjects will be provided with a study e-cigarette and e-liquid to use during the duration of the study. They will be asked to complete various questionaries as well as provide blood, exhaled breath, exhaled breath condensate, saliva and buccal cell samples.
Their puffing behavior and biomarkers of tobacco exposure and harm will be measured as follows:
E-cigarette (EC) puffing behavior - In order to determine a measurement of toxicant dose, topography markers such as puff duration, number of puffs, and interpuff interval (IPI) will be assessed via video recorded sessions.
E-liquid consumption will be assessed by weighing the filled tanks before and after the session.
Subjective effects such as nicotine withdrawal symptoms, urge to vape, and positive/negative effects will be assessed by questionnaires during the human lab studies.
The total nicotine delivered and GSH oxidation will be calculated in blood via LC-MS. Exhaled breath condensate (EBC) samples will be analyzed by Liquid Chromatography/Mass Spectroscopy (LC/MS) and include the primary biomarker of oxidative stress (8-isoprostane) and a series of proinflammatory cytokines (IL-6 and hsCRP). Exfoliated buccal mucosal cells will be analyzed for 8-OHdG-DNA adducts by LC-MS/MS as a biomarker of oral oxidant exposure/damage.
Tipo di studio
Interventistico
Iscrizione (Stimato)
50
Fase
- Non applicabile
Contatti e Sedi
Questa sezione fornisce i recapiti di coloro che conducono lo studio e informazioni su dove viene condotto lo studio.
Contatto studio
- Nome: Kenneth Houser, MS
- Numero di telefono: 717-531-5473
- Email: khouser@pennstatehealth.psu.edu
Backup dei contatti dello studio
- Nome: Zachary Btizer, Ph. D.
- Numero di telefono: 717-531-4387
- Email: zbitzer@pennstatehealth.psu.edu
Luoghi di studio
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Pennsylvania
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Hershey, Pennsylvania, Stati Uniti, 17033
- Penn State College of Medicine
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Contatto:
- Kenneth Houser, MS
- Numero di telefono: 717-531-5473
- Email: khouser@pennstatehealth.psu.edu
-
Investigatore principale:
- Zachary Bitzer, Ph.D.
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-
Criteri di partecipazione
I ricercatori cercano persone che corrispondano a una certa descrizione, chiamata criteri di ammissibilità. Alcuni esempi di questi criteri sono le condizioni generali di salute di una persona o trattamenti precedenti.
Criteri di ammissibilità
Età idonea allo studio
- Adulto
- Adulto più anziano
Accetta volontari sani
No
Descrizione
Inclusion Criteria:
- 21 years of age or older
- Normal pulmonary and cardiovascular function with no history of COPD or cardiovascular disease (excluding hypertension)
- Current exclusive use of a sub-ohm/mod or pod EC devices (≥ 1mL e-liquid/per day, ≥6 mg/ml nicotine concentration, EC for ≥ 1 year)
- No plan on quitting nicotine use over the course of the study
- All other forms of nicotine must be used <5 days out of the past 28 days.
- Able to read and write in English
- Have access to email and a smartphone/computer that has reliable internet connection
Exclusion Criteria:
- Women who are pregnant and/or nursing or trying to become pregnant
- Unstable or significant medical condition in the past 3 months (e.g., recent heart attack or other serious heart condition, stroke, severe angina)
- Respiratory diseases (e.g., exacerbations of asthma or COPD, require oxygen, require oral prednisone), kidney (e.g., dialysis) or liver disease (e.g., cirrhosis), severe immune system disorders (e.g., uncontrolled HIV/AIDS, multiple sclerosis symptoms) or any medical disorder/medication that may affect participant safety or biomarker data
- Uncontrolled substance abuse or inpatient treatment for that condition in the past 6 months
- Have immediate family or household members currently participating in this trial
Piano di studio
Questa sezione fornisce i dettagli del piano di studio, compreso il modo in cui lo studio è progettato e ciò che lo studio sta misurando.
Come è strutturato lo studio?
Dettagli di progettazione
- Scopo principale: Scienza basilare
- Assegnazione: Non randomizzato
- Modello interventistico: Assegnazione incrociata
- Mascheramento: Separare
Armi e interventi
Gruppo di partecipanti / Arm |
Intervento / Trattamento |
|---|---|
|
Sperimentale: High Wattage/High Propylene Glycol
High temperature and high propylene glycol concentration
|
Study provided electronic cigarette will be set to a high wattage resulting in a higher usage temperature (275 C)
Study provided electronic cigarette liquid will have a higher percentage of propylene glycol (90%)
|
|
Sperimentale: Low Wattage/Low Propylene Glycol
Low temperature and low propylene glycol concentration
|
Study provided electronic cigarette will be set to a low wattage resulting in a lower usage temperature (200 C)
Study provided electronic cigarette liquid will have a higher percentage of propylene glycol (10%)
|
|
Sperimentale: High Wattage/Low Propylene Glycol
High temperature and low propylene glycol concentration
|
Study provided electronic cigarette will be set to a high wattage resulting in a higher usage temperature (275 C)
Study provided electronic cigarette liquid will have a higher percentage of propylene glycol (10%)
|
|
Sperimentale: Low Wattage/High Propylene Glycol
Low temperature and high propylene glycol concentration
|
Study provided electronic cigarette liquid will have a higher percentage of propylene glycol (90%)
Study provided electronic cigarette will be set to a low wattage resulting in a lower usage temperature (200 C)
|
Cosa sta misurando lo studio?
Misure di risultato primarie
Misura del risultato |
Misura Descrizione |
Lasso di tempo |
|---|---|---|
|
8-isoprostane in Exhaled Breath Condensate
Lasso di tempo: Baseline prior to study product use in Phase 1
|
8-isoprostane levels will be analyzed via LC-MS
|
Baseline prior to study product use in Phase 1
|
|
8-isoprostane in Exhaled Breath Condensate
Lasso di tempo: 5 minutes after directed study product use in Phase 1
|
8-isoprostane levels will be analyzed via LC-MS
|
5 minutes after directed study product use in Phase 1
|
|
8-isoprostane in Exhaled Breath Condensate
Lasso di tempo: Immediately prior to study product use in Phase 2; visit occurs after 2 weeks of at home product use
|
8-isoprostane levels will be analyzed via LC-MS
|
Immediately prior to study product use in Phase 2; visit occurs after 2 weeks of at home product use
|
|
8-isoprostane in Exhaled Breath Condensate
Lasso di tempo: 5 minutes after directed study product use in Phase 2b; visit occurs after 2 weeks of at home product use
|
8-isoprostane levels will be analyzed via LC-MS
|
5 minutes after directed study product use in Phase 2b; visit occurs after 2 weeks of at home product use
|
|
8-OHdG DNA Adducts in Buccal Cells
Lasso di tempo: Baseline prior to study product use in Phase 1
|
8-OHdG-DNA adducts will be measured via LC-MS/MS
|
Baseline prior to study product use in Phase 1
|
|
8-OHdG DNA Adducts in Buccal Cells
Lasso di tempo: 5 minutes after directed study product use in Phase 1
|
8-OHdG-DNA adducts will be measured via LC-MS/MS
|
5 minutes after directed study product use in Phase 1
|
|
8-OHdG DNA Adducts in Buccal Cells
Lasso di tempo: Immediately prior to study product use in Phase 2; visit occurs after 2 weeks of at home product use
|
8-OHdG-DNA adducts will be measured via LC-MS/MS
|
Immediately prior to study product use in Phase 2; visit occurs after 2 weeks of at home product use
|
|
8-OHdG DNA Adducts in Buccal Cells
Lasso di tempo: 5 minutes after directed study product use in Phase 2b; visit occurs after 2 weeks of at home product use
|
8-OHdG-DNA adducts will be measured via LC-MS/MS
|
5 minutes after directed study product use in Phase 2b; visit occurs after 2 weeks of at home product use
|
|
Total nicotine in Blood Samples
Lasso di tempo: Baseline prior to study product use in Phase 1
|
Nicotine levels will analyzed via LC-MS
|
Baseline prior to study product use in Phase 1
|
|
Total nicotine in Blood Samples
Lasso di tempo: 5 minute after directed study product use in Phase 1
|
Nicotine level will be analyzed via LC-MS
|
5 minute after directed study product use in Phase 1
|
|
Total nicotine in Blood Samples
Lasso di tempo: Immediately prior to study product use in Phase 2; visit occurs after 2 weeks of at home product use
|
Nicotine levels will be analyzed via LC-MS
|
Immediately prior to study product use in Phase 2; visit occurs after 2 weeks of at home product use
|
|
Total nicotine in Blood Samples
Lasso di tempo: 5 minutes after directed study product use in Phase 2b; visit occurs after 2 weeks of at home product use
|
Nicotine levels will be analyzed via LC-MS
|
5 minutes after directed study product use in Phase 2b; visit occurs after 2 weeks of at home product use
|
Misure di risultato secondarie
Misura del risultato |
Misura Descrizione |
Lasso di tempo |
|---|---|---|
|
E-cigarette Puffing Behavior - Duration of Puffs
Lasso di tempo: 5 minutes of directed study product laboratory use in Phase 1
|
E-cigarette puff duration will be monitored via video during the 5 minutes of laboratory product usage.
|
5 minutes of directed study product laboratory use in Phase 1
|
|
E-cigarette Puffing Behavior - Duration of Puffs
Lasso di tempo: 5 minutes of directed study product laboratory use in Phase 2b; visit occurs after 2 weeks of at home product use
|
E-cigarette puff duration will be monitored via video during the 5 minutes of laboratory product usage.
|
5 minutes of directed study product laboratory use in Phase 2b; visit occurs after 2 weeks of at home product use
|
|
E-cigarette Puffing Behavior - Number of Puffs
Lasso di tempo: 5 minutes of directed study product laboratory use in Phase 1.
|
Number of e-cigarette puffs will be monitored via video during the 5 minutes of laboratory product usage.
|
5 minutes of directed study product laboratory use in Phase 1.
|
|
E-cigarette Puffing Behavior - Number of Puffs
Lasso di tempo: 5 minutes of directed study product use in Phase 2b; visit occurs after 2 weeks of at home product use
|
Number of e-cigarette puffs will be monitored via video during the 5 minutes of laboratory product usage.
|
5 minutes of directed study product use in Phase 2b; visit occurs after 2 weeks of at home product use
|
|
E-cigarette Puffing Behavior - Interpuff Interval
Lasso di tempo: 5 minutes of directed study product laboratory use in Phase 1
|
E-cigarette interpuff interval will be monitored via video during the 5 minutes of laboratory product usage.
|
5 minutes of directed study product laboratory use in Phase 1
|
|
E-cigarette Puffing Behavior - Interpuff Interval
Lasso di tempo: 5 minutes of directed study product use in Phase 2b; visit occurs after 2 weeks of at home product use
|
E-cigarette interpuff interval will be monitored via video during the 5 minutes of laboratory product usage.
|
5 minutes of directed study product use in Phase 2b; visit occurs after 2 weeks of at home product use
|
Collaboratori e investigatori
Qui è dove troverai le persone e le organizzazioni coinvolte in questo studio.
Sponsor
Collaboratori
Investigatori
- Investigatore principale: Zachary Bitzer, Ph.D., Penn State Hershey College of Medicine
Studiare le date dei record
Queste date tengono traccia dell'avanzamento della registrazione dello studio e dell'invio dei risultati di sintesi a ClinicalTrials.gov. I record degli studi e i risultati riportati vengono esaminati dalla National Library of Medicine (NLM) per assicurarsi che soddisfino specifici standard di controllo della qualità prima di essere pubblicati sul sito Web pubblico.
Studia le date principali
Inizio studio (Stimato)
1 giugno 2026
Completamento primario (Stimato)
1 agosto 2028
Completamento dello studio (Stimato)
1 dicembre 2028
Date di iscrizione allo studio
Primo inviato
13 maggio 2026
Primo inviato che soddisfa i criteri di controllo qualità
24 maggio 2026
Primo Inserito (Effettivo)
29 maggio 2026
Aggiornamenti dei record di studio
Ultimo aggiornamento pubblicato (Effettivo)
29 maggio 2026
Ultimo aggiornamento inviato che soddisfa i criteri QC
24 maggio 2026
Ultimo verificato
1 maggio 2026
Maggiori informazioni
Termini relativi a questo studio
Termini MeSH pertinenti aggiuntivi
Altri numeri di identificazione dello studio
- STUDY00028240
- U54DA058271 (Sovvenzione/contratto NIH degli Stati Uniti)
Piano per i dati dei singoli partecipanti (IPD)
Hai intenzione di condividere i dati dei singoli partecipanti (IPD)?
NO
Informazioni su farmaci e dispositivi, documenti di studio
Studia un prodotto farmaceutico regolamentato dalla FDA degli Stati Uniti
No
Studia un dispositivo regolamentato dalla FDA degli Stati Uniti
No
Queste informazioni sono state recuperate direttamente dal sito web clinicaltrials.gov senza alcuna modifica. In caso di richieste di modifica, rimozione o aggiornamento dei dettagli dello studio, contattare register@clinicaltrials.gov. Non appena verrà implementata una modifica su clinicaltrials.gov, questa verrà aggiornata automaticamente anche sul nostro sito web .