- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT04090606
Tobacco Constituents and Biomarkers
August 10, 2021 updated by: Masonic Cancer Center, University of Minnesota
Constituent Yields and Biomarkers of Exposure for Tobacco Product Regulation
This proposal addresses several research priorities related to the regulatory authority of the Food and Drug Administration (FDA) Center for Tobacco Products as mandated by the Family Smoking Prevention and Tobacco Control Act.
Scientific evidence supports the important role of tobacco and cigarette smoke carcinogens in the development of cancers associated with cigarette smoking.
Regulation of the levels of harmful constituents in cigarette smoke is one of the tobacco control strategies that now can be employed by the FDA and may serve to reduce tobacco carcinogen exposures in those smokers who are unable or unwilling to quit smoking.
Such regulation will require a valid and robust approach to the assessment of comparative toxicity and carcinogenicity among various cigarette brands.
This proposal will help develop a testing approach that can produce meaningful predictions of changes in human exposure due to changes in constituent levels in cigarette smoke, and hence serve as a reliable measure for product regulation.
Thus, the proposed research will generate findings and data that are directly relevant to inform the FDA's regulation of the manufacture, distribution, and marketing of tobacco products to protect public health.
The human trial deals with Aims 2 and 3 of this study.
Study Overview
Status
Completed
Conditions
Study Type
Observational
Enrollment (Actual)
65
Participation Criteria
Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.
Eligibility Criteria
Ages Eligible for Study
18 years to 65 years (Adult, Older Adult)
Accepts Healthy Volunteers
No
Genders Eligible for Study
All
Sampling Method
Non-Probability Sample
Study Population
Adult smokers from Minneapolis-St.
Paul metro area
Description
Inclusion Criteria:
- Male or female adult smokers 18-65 years of age, who smoke at least 7 cigarettes per day (to assure that biomarker levels are above the limit of quantitation) and do not have plans to quit smoking in the next month;
- Smoked the same brand for >80% of their cigarettes over the course of at least 1 year, and smoked not more than 20 cigarettes (1 pack) of a different brand within two weeks prior to the eligibility screening;
- Not using any other nicotine or tobacco product;
- Subjects who are not taking any medications that affect relevant metabolic enzymes;
- Women who are not pregnant or nursing;
- Subjects have provided written informed consent to participate in the study (adolescents under the age of 18 will be excluded because this project involves use of tobacco products).
Exclusion Criteria:
- Significant immune system disorders, respiratory diseases, kidney or liver diseases or any other medical disorders that may affect biomarker data;
- Current or recent alcohol or drug abuse problems (to ensure alcohol and drug use does not affect biomarkers of exposure and to maximize retention);
- Regular tobacco use (e.g., greater than weekly) other than cigarettes;
- Currently using nicotine replacement or other tobacco cessation products (to minimize confounding effects of another product);
- Pregnant or breastfeeding (due to toxic effects from tobacco products)
- Report smoking more than 1 pack (20 cigarettes) of a non-usual brand cigarette in the past two weeks * Participants who report smoking 2 or more non-usual brand cigarettes the day before the clinic visit will be ineligible
Study Plan
This section provides details of the study plan, including how the study is designed and what the study is measuring.
How is the study designed?
Design Details
- Observational Models: Cohort
- Time Perspectives: Prospective
Cohorts and Interventions
Group / Cohort |
Intervention / Treatment |
---|---|
FTC Method
|
cigarettes are smoked by drawing 35 mL puff volumes over 2 s, with 60 s interval between puffs and no blocking of filter ventilation holes
|
Massachusetts Method
|
45-mL puffs drawn over 2 s, with 30 s interval between puffs and 50% blocking of filter ventilation holes
|
Health Canada Intense Method
|
55-mL puff volumes of 2-s duration, with 30 s interval between puffs and 100% blocking of filter ventilation holes
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
The extent to which differences in smoke yields of NNN and NNK per mg nicotine are predictive of differences in smokers' exposure to these carcinogens (human trial)
Time Frame: 1 Year
|
Correlation between urinary total NNN and total NNAL (with and without normalization for total nicotine intake) in smokers and the machine-measured yields of NNN and NNK (per mg nicotine and per cigarette) in cigarettes smoked by these individuals.
The relationship will be investigated for the machine-measured yields generated by 3 different smoking regimens.
|
1 Year
|
The extent to which NNN and NNK per mg nicotine levels in spent cigarette filters are predictive of differences in smokers' exposure to these carcinogens (human trial)
Time Frame: 1 Year
|
Correlation, for each smoker, between the TSNA per mg nicotine content in their spent cigarette filters with the levels of total NNN and total NNAL per nicotine equivalents in their urine
|
1 Year
|
Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Individual factors affecting TSNA per mg nicotine and exposures in smokers (human trial)
Time Frame: 1 Year
|
Correlation (if any) of individual factors and the relationship between the machine-measured TSNA per mg nicotine and exposures in smokers.
|
1 Year
|
Relationship between 1-HOP and TSNA per mg Nicotine
Time Frame: 1 Year
|
Correlation between urinary biomarker of polycyclic aromatic hydrocarbon exposure (1-HOP) and TSNA per mg nicotine yields in cigarette smoke.
|
1 Year
|
Collaborators and Investigators
This is where you will find people and organizations involved with this study.
Collaborators
Study record dates
These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.
Study Major Dates
Study Start (Actual)
December 1, 2013
Primary Completion (Actual)
March 22, 2021
Study Completion (Actual)
March 22, 2021
Study Registration Dates
First Submitted
September 10, 2019
First Submitted That Met QC Criteria
September 12, 2019
First Posted (Actual)
September 16, 2019
Study Record Updates
Last Update Posted (Actual)
August 11, 2021
Last Update Submitted That Met QC Criteria
August 10, 2021
Last Verified
August 1, 2021
More Information
Terms related to this study
Other Study ID Numbers
- 2013NTLS115
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
No
Studies a U.S. FDA-regulated device product
No
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
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