Metabolism of NNK in Japanese Americans
Public ClinicalTrials.gov record NCT04228952. Field values are reproduced from the official study page; the official ClinicalTrials.gov record remains the source of truth for eligibility, enrollment, and contact information.
Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.
Official title
STUDY 2: CLINICAL PROTOCOL Metabolism of NNK Among Japanese Americans
Brief summary
Reproduced verbatim from the official ClinicalTrials.gov record. Not medical advice.
The risk of lung cancer varies by individual and by ethnic/racial group. In this study the investigators will explore how individual differences in the metabolism of a tobacco-specific lung carcinogen may contribute to the variable risk of lung cancer between ethnic/racial groups. In this 10 day clinical trial, Japanese Americans will smoke a cigarette containing deuterium-labeled 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone (NNK), a tobacco-specific lung carcinogen. The study cigarette will be smoked for 7 days. This will allow for NNK metabolic profiling and determining the effect of CYP2A6 genotype on the level of NNK α-hydroxylation in Japanese Americans smokers using \[pyridine- D4\]-NNK containing cigarettes.
Study identification
- NCT ID
- NCT04228952
- Recruitment status
- Completed
- Study type
- Observational
- Phase
- Not listed
- Enrollment
- 16 participants
Conditions and interventions
Conditions
Interventions
- Modified Natural American Spirit-Tan or Green cigarettes injected with labeled NNK Combination Product
Combination Product
Eligibility (public fields only)
- Age range
- 21 Years and older
- Sex
- All
- Healthy volunteers
- Accepts healthy volunteers
This page does not interpret eligibility. Detailed inclusion and exclusion criteria are on the official ClinicalTrials.gov record.
Study timeline
- Start date
- Aug 31, 2020
- Primary completion
- Oct 14, 2021
- Completion
- Apr 13, 2025
- Last update posted
- Jul 31, 2025
2020 – 2025
United States locations
- U.S. sites
- 1
- U.S. states
- 1
- U.S. cities
- 1
| Facility | City | State | ZIP | Site status |
|---|---|---|---|---|
| University of Hawaii Cancer Center | Honolulu | Hawaii | 96813 | — |
Site contact phone numbers, emails, and investigator names are intentionally not displayed here. Open the official ClinicalTrials.gov record for site contact information.
About this trial record page
- What this page shows
- Public field values for ClinicalTrials.gov record NCT04228952, including study identification, conditions, interventions, eligibility (age, sex, healthy volunteer), timeline, and U.S. site list.
- What this page does not do
- No medical advice, eligibility judgments, treatment recommendations, study quality scoring, or AI-generated medical summaries. No site contact phone numbers, emails, or investigator names.
- Where the data comes from
- Sourced from the official ClinicalTrials.gov public API. The official record is the source of truth.
- Last refresh
- Last update posted Jul 31, 2025 · Synced Sep 15, 2026
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Open the official record
The complete protocol, eligibility criteria, and contact information for NCT04228952 live on ClinicalTrials.gov.