Oral Cell DNA Adducts in Smokers (OCDNA)

September 29, 2022 updated by: University of Minnesota

Quantitation of Oral Cell DNA Adducts in Smokers

DNA adducts in the oral mucosa cells of 100 smokers from 3 ethnic groups - Native Hawaiians, Whites, and Japanese Americans with differing risks for lung cancer upon cigarette smoking will be quantified. DNA adducts of tobacco smoke carcinogens will be quantified using both targeted and untargeted approaches.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Not yet recruiting

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Detailed Description

Using high resolution mass spectrometry, quantify known DNA adducts in oral mucosa cells of 100 smokers from each ethnic group - Native Hawaiians, Whites, and Japanese Americans. DNA adducts of tobacco-specific compounds, formaldehyde, and acrolein will be quantified.

2. Analyze the urine of 100 smokers and 100 non-smokers from each of these groups for mercapturic acids of acrolein and crotonaldehyde, the F2-isoprostane 8-iso-PGF-2α, a biomarker of oxidative damage, and the prostaglandin E2 metabolite PGEM, a biomarker of inflammation, as well as total nicotine equivalents and total NNAL (smokers only). These data will provide critical information relevant to the high risk of Native Hawaiians for lung cancer, and in relationship to the DNA adduct measurements of Specific Aim 1.

3. Use newly developed high resolution mass spectrometric, high throughput DNA adductomic approach to screen for known and unknown DNA adducts to identify a comprehensive DNA modification signature derived from cigarette smoking.

  1. Using a targeted DNA adductomic method, screen for multiple DNA modifications simultaneously. The adducts analyzed in Specific Aim 1 will be added to a list including endogenous, 1,3-butadiene-derived (in collaboration with Project 3), aldehyde-derived and nitrosamine or alkylating agent-derived DNA adducts. In parallel, apply DNA adductomic methods in an untargeted mode to investigate the presence of previously unknown DNA adducts. The unknown adducts detected by the untargeted analysis will be included in the list of targeted DNA adducts to ultimately obtain a sensitive method to assess overall DNA damage resulting from cigarette smoking.
  2. The list of DNA adducts created in Specific Aim 3a will be applied to investigate differences in the DNA damage signature in selected samples analyzed in Specific Aim 1.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Observational

Enrollment (Anticipated)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
300

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Study Contact

The name and contact information for the person who can answer enrollment questions for a clinical study. Each location where the study is being conducted may also have a specific contact, who may be better able to answer those questions.

Study Contact Backup

  • Name: Stephen S Hecht, Ph.D
  • Phone Number: 612-624-7604
  • Email: hecht002@umn.edu

Study Locations

  • United States
    • Minnesota
      • Minneapolis, Minnesota, United States, 55455
        • Tobacco Use Research Center
        • Contact:
        • Contact:
        • Principal Investigator:
          • Stephen S Hecht, Ph.D.

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

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

18 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

N/A

Genders Eligible for Study

All

Sampling Method

Probability Sample

Study Population

100 each of three ethnic groups: Native Hawaiians, Japanese Americans, whites

Description

Inclusion Criteria:

  • currently smoke at least 5 cigarettes per day, self-identified Japanese Americans, European Americans, or Native Hawaiians.

Exclusion Criteria:

  • no current use of other nicotine containing products, no acute or uncontrolled medical or psychiatric conditions, no greater than 14 alcoholic drinks per week, not pregnant, not breastfeeding, not currently taking any medications that affect relevant metabolic enzymes, no active infection.

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

Group / Cohort

A group or subgroup of participants in an observational study that is assessed for biomedical or health outcomes.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Native Hawaiian cigarette smokers
oral cell DNA adducts
Other: oral cell DNA adducts
oral cells will be collected, DNA isolated, and analyzed for adducts
White (European Americans) cigarette smokers
oral cell DNA adducts
Other: oral cell DNA adducts
oral cells will be collected, DNA isolated, and analyzed for adducts
Japanese American cigarette smokers
oral cell DNA adducts
Other: oral cell DNA adducts
oral cells will be collected, DNA isolated, and analyzed for adducts

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
Quantitation of oral cell DNA adducts
Time Frame: Baseline
DNA adducts of acrolein, formaldehyde, and tobacco-specific compounds
Baseline

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
Urinary metabolites
Time Frame: Baseline
Metabolites of acrolein crotonaldehyde, oxidative damage and inflammation
Baseline

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
University of Minnesota

Collaborators

Collaborators

An organization other than the sponsor that provides support for a clinical study. This support may include activities related to funding, design, implementation, data analysis, or reporting.
University of Hawaii

Investigators

Investigators

A researcher involved in a clinical study. Related terms include site principal investigator, site sub-investigator, study chair, study director, and study principal investigator.
  • Principal Investigator: Stepehn Hecht, PhD, University of Minnesota

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 (Anticipated)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
June 1, 2023

Primary Completion (Anticipated)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
October 31, 2026

Study Completion (Anticipated)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
January 31, 2027

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
September 1, 2017

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
September 14, 2017

First Posted (Actual)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
September 18, 2017

Study Record Updates

Last Update Posted (Actual)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
September 30, 2022

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
September 29, 2022

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
September 1, 2022

More Information

Terms related to this study

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • 2017NTLS019

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

Undecided

IPD Plan Description

Only unidentified data will be shared.

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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