Contribution of UGT2B17 to the Pharmacokinetics of Diclofenac

Recruiting now · Early Phase 1

Conditions studied: Interaction

In brief

The purpose of this pilot study is to gather preliminary data on the (1) contribution of the understudied drug metabolizing enzyme, UDP-glucuronosyltransferase (UGT) 2B17, to the metabolism of a widely used medication, diclofenac, and (2) impact of the UGT2B17 inhibitor and natural product, curcumin, on diclofenac pharmacokinetics. Results will inform future studies aimed to assess the effects of UGT2B17 genetic polymorphisms and co-consumed xenobiotics on the pharmacokinetics and toxicity risk of diclofenac and other UGT2B17 drug substrates.

Key facts

Study ID

NCT06053411

Run by

Washington State University

People needed

30

Starts

2024-03-01

Expected to finish

2026-12-18

Last updated by the study team

2026-06-04

Who can join

Age: 18 and older, up to 65. Sex: any. Healthy volunteers: accepted.

You may qualify if…

• Aged from 18-64 years and healthy
• Not taking any medications (prescription and non-prescription) or dietary/herbal supplements known to alter the pharmacokinetics of diclofenac or curcumin
• Willing to abstain from consuming caffeinated beverages or other caffeine-containing products the evening before and morning of the first day of each study arm
• Willing to abstain from consuming any alcoholic beverages for one day prior to any study day, during the 14-hour inpatient days, and for the outpatient visit(s) following the 14-hour days
• Willing to use a secondary method of birth control that does not include the introduction or discontinuance of hormonal-based birth control (such as abstinence, copper IUD, or condoms)
• Have the time to participate
• Written informed consent (and assent when applicable) obtained from subject or subject's legal representative and ability for the subject to comply with the requirements of the study

You may not qualify if…

• Under the age of 18 or over the age of 65 years
• Smoke/vape/chew tobacco products
• Use cannabis products, including marijuana, hemp, and other THC- or CBD-containing products
• Have any current major illness or chronic illness such as (but not limited to) kidney disease, hepatic disease, diabetes mellitus, hypertension, coronary artery disease, chronic obstructive pulmonary disease, cancer, or HIV/AIDS
• History of anemia or any other significant hematologic disorder
• History of drug or alcohol addiction or major psychiatric illness
• Pregnant or nursing or plan to become pregnant within 3 weeks after participation
• History of allergy intolerance to diclofenac or curcumin
• Taking concomitant medications, both prescription and non-prescription (including dietary supplements/herbal products), known to alter the pharmacokinetics of diclofenac or curcumin
• Taking any turmeric spice or curcumin supplement
• Presence of a condition or abnormality that, in the opinion of the Investigator, would compromise participant safety or quality of the data
• Out-of-range clinical laboratory value that the study physician considers participation in the study a health risk

Where it is running

• Washington State University College of Pharmacy and Pharmaceutical Sciences — Spokane, Washington, United States (enrolling)

Full record on ClinicalTrials.gov

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