- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT03318978
Benzo[a]Pyrene Ultralow Dose-Response Study
February 14, 2024 updated by: David Williams, Oregon State University
Evaluation of the pharmacokinetics for [14C]-benzo[a]pyrene ([14C]-BaP) and metabolites in plasma and urine over 48 hours following 4 oral doses of 25, 50, 10 and 250 ng (2.7-27 nCi).
Study Overview
Status
Completed
Conditions
Intervention / Treatment
Detailed Description
The pharmacokinetics for [14C]-BaP and metabolites will be assessed by UHLPC-Accelerator Mass Spectrometry (AMS, Lawrence Livermore National Laboratory) in plasma and urine collected over 48 hours following oral doses of 25, 50, 100 or 250 ng (2.7-27 nCi).
Metabolite profiles and kinetics of elimination over this dose range are predicted to be consistent with a BaP physiologically based pharmacokinetic (PBPK) model developed by Pacific Northwest National Laboratory (PNNL).
A non-smoker, not exposed occupationally, receives 270-700 ng of BaP daily; about 95% dietary.
The WHO has set an estimated safe daily lifetime (70 year/70 Kg individual, cancer endpoint) exposure to BaP of 42-350 ng.
This protocol represents de minimus risk.
Study Type
Interventional
Enrollment (Actual)
8
Phase
- Early Phase 1
Contacts and Locations
This section provides the contact details for those conducting the study, and information on where this study is being conducted.
Study Locations
-
-
Oregon
-
Corvallis, Oregon, United States, 97331
- Clinical Research Facility, 407 Linus Pauling Science Center, Oregon State University
-
-
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
21 years to 65 years (Adult, Older Adult)
Accepts Healthy Volunteers
Yes
Description
Inclusion Criteria:
Inclusion criteria for women:
- Age 21-65 (inclusive)
- Must be post-menopausal or have had surgical sterilization to eliminate any possibility for fetal exposure
- Willing to defer blood donation for one month before, throughout, and one month after completion of study activities
- Willing to avoid consuming cruciferous vegetables, I3C or DIM supplements, smoked or cured meat or cheeses, or charcoal-grilled meats for 2 weeks prior to and during each study cycle (gas grilled foods acceptable)
Inclusion criteria for men:
- Age 21-65 (inclusive)
- Willing to defer blood donation for one month before, throughout, and one month after completion of study activities
- Willing to avoid consuming cruciferous vegetables, I3C or DIM supplements, smoked or cured meat or cheeses, or charcoal-grilled meats for 2 weeks prior to and during each study cycle (gas grilled foods acceptable)
Exclusion Criteria:
Exclusion criteria for both men and women:
- Smoker (tobacco or other substances) or use of smokeless tobacco in past 3 months or living with smoker
- Regular use of medications that affect gut motility or nutrient absorption (e.g. cholestyramine, sucralfate, orlistat, pro- or anti-motility agents)
- History of gastrointestinal surgery (e.g. bariatric surgery, cholecystectomy) or gastrointestinal disorder (Crohn's disease, celiac disease, IBS, or colitis)
- Current or history of kidney or liver disease
- Prior high-dose 14C exposure from medical tests. (micro-dose 14C exposure not exclusionary)
- Occupational PAH exposure (e.g. roofers, asphalt pavers, fire-fighters, etc.)
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
- Primary Purpose: Basic Science
- Allocation: Non-Randomized
- Interventional Model: Single Group Assignment
- Masking: Single
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Experimental: 25 ng dose
Capsule containing 25 ng (2.7 nCi) [14C]-benzo[a]pyrene (BaP)
|
Oral micro-dose range (25, 50, 100 and 250 ng)
Other Names:
|
Experimental: 50 ng dose
Capsule containing 50 ng (2.7 nCi) [14C]-benzo[a]pyrene (BaP)
|
Oral micro-dose range (25, 50, 100 and 250 ng)
Other Names:
|
Experimental: 100 ng dose
Capsule containing 100 ng (2.7 nCi) [14C]-benzo[a]pyrene (BaP)
|
Oral micro-dose range (25, 50, 100 and 250 ng)
Other Names:
|
Experimental: 250 ng dose
Capsule containing 100 ng (2.7 nCi) [14C]-benzo[a]pyrene (BaP)
|
Oral micro-dose range (25, 50, 100 and 250 ng)
Other Names:
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Plasma and urine benzo[a]pyrene and metabolite levels after oral dose
Time Frame: 48 hours
|
Plasma and urine levels measured by accelerator mass spectrometry
|
48 hours
|
Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Peak plasma concentration Cmax
Time Frame: 48 hours
|
Determination of highest concentration in plasma
|
48 hours
|
Time at highest plasma concentration Tmax
Time Frame: 48 hours
|
Determination of time at which plasma concentration is highest
|
48 hours
|
Area under plasma concentration versus time curve AUC
Time Frame: 48 hours
|
Integration of concentration over time
|
48 hours
|
Rate of elimination
Time Frame: 48 hours
|
Determination of constants for rate of elimination from plasma
|
48 hours
|
Metabolites in plasma
Time Frame: 48 hours
|
Determination of plasma metabolites
|
48 hours
|
Metabolites in urine
Time Frame: 48 hours
|
Determination of urinary metabolites
|
48 hours
|
Collaborators and Investigators
This is where you will find people and organizations involved with this study.
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)
April 17, 2018
Primary Completion (Actual)
January 1, 2024
Study Completion (Actual)
February 1, 2024
Study Registration Dates
First Submitted
October 17, 2017
First Submitted That Met QC Criteria
October 20, 2017
First Posted (Actual)
October 24, 2017
Study Record Updates
Last Update Posted (Actual)
February 16, 2024
Last Update Submitted That Met QC Criteria
February 14, 2024
Last Verified
February 1, 2024
More Information
Terms related to this study
Other Study ID Numbers
- LPI-8233
- R01ES028600 (U.S. NIH Grant/Contract)
Plan for Individual participant data (IPD)
Plan to Share Individual Participant Data (IPD)?
NO
IPD Plan Description
Deidentified samples sent to Lawrence Livermore National Laboratory Deidentified data sent to Pacific Northwest National Laboratory
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
Yes
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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