The Cellular Pharmacology of F-TAF in Dried Blood Spots

Completed · Phase 1

Conditions studied: Healthy Volunteers

In brief

Adherence to daily dosing is very important for how well Emtricitabine/Tenofovir Alafenamide (F/TAF) works for treatment of chronic human immunodeficiency virus (HIV), or prevention of HIV acquisition. Methods to measure medication adherence to Tenofovir disoproxil fumarate (tenofovir DF, TDF), a similar but different prodrug of tenofovir, have been developed but cannot be extrapolated to F-TAF. By measuring F-TAF (the drug) and metabolites in the blood cells and dried blood spots, the study plans to see if these results predict adherence to taking the drug. The goal of this study is to vary the amount of F-TAF dosing and see if the drug levels in dried blood spots (DBS) change in a predictable way. This study will mimic different levels of adherence (33%, 67%, and 100% of daily dosing) using directly observed therapy (DOT) to establish the relationship between F-TAF in dried blood spots and adherence. Investigators will also measure drug in hair clippings to see if hair or DBS are a better predictor of adherence.

Key facts

Study ID

NCT02962739

Run by

University of Colorado, Denver

People needed

38

Starts

2016-03-01

Expected to finish

2019-05-22

Last updated by the study team

2021-01-25

Who can join

Age: 18 and older, up to 59. Sex: any. Healthy volunteers: accepted.

You may qualify if…

• Ambulatory 18-59 year old adults. Enrollment will proceed without the need to meet specific race/gender targets, but balanced gender and African-Americans and Latino representation will be sought.
• Ability to comply with study procedures, including directly observed dosing visits and availability and use of video streaming technology.

You may not qualify if…

• Inability to give informed consent
• Pregnancy or plan to become pregnant in the next 12 months or unwillingness to use birth control
• Current breastfeeding
• High risk of HIV-1 infection, for example:
• sexually active with an HIV infected partner;
• men who have sex with men who may engage in condomless intercourse with HIVinfected partners, or
• partner of unknown status during the study;
• males or females who exchange sex for money, shelter, or gifts;
• active injection drug use or during the last 12 months;
• newly diagnosed sexually transmitted infections in last 6 months
• Positive screening HIV+ ELISA or suspected acute HIV infection in the opinion of the clinician. Example signs and symptoms of acute HIV infection include combinations of:
• fever,
• headache,
• fatigue,
• arthralgia,
• vomiting,
• myalgia, .
• diarrhea,
• pharyngitis,
• rash,
• night sweats, and
• adenopathy (cervical or inguinal)
• Positive Hepatitis B Virus (HBV) surface antigen test at screening
• Active psychiatric illness, social condition, or alcohol/drug abuse that, in the opinion of the investigators, would interfere with study requirements.
• Glomerular Filtration Rate (GFR) estimate < 60 ml/min (MDRD equation).

Where it is running

• University of Colorado- Anschutz Campus — Aurora, Colorado, United States

Full record on ClinicalTrials.gov

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