Pharmacokinetics of Intracellular TFV-DP & FTC-TP in HIV-infected

Status Recruiting

Clinical Trial Summary

Tenofovir (TFV) disoproxil fumarate (TDF) plus emtricitabine (FTC) or lamivudine (3TC) is the preferred nucleoside backbone of first-line antiretroviral therapy (ART) for adolescents in sub-Saharan Africa. In addition, TDF/FTC is recommended for preexposure prophylaxis (PrEP) for human immunodeficiency virus (HIV) infection in adolescents at substantial risk of acquisition of HIV infection, as well as for hepatitis B virus (HBV) treatment in those with HBV/HIV coinfection. The efficacy TDF and FTC are dependent on intracellular concentrations of the active phosphate anabolites, called TFV diphosphate (TFV-DP) and FTC triphosphate (FTC-TP). However, the intracellular pharmacokinetics of TFV-DP and FTC-TP to examine the adequacy of current dosages in African adolescents has not been previously studied. Thus, examining the pharmacokinetics (PK) of these widely used antiretrovirals in African adolescents is important as ART outcomes remain poor and the recommended dosages of these drugs for children and adolescent were extrapolated from drug approval clinical trials in adult in the United States and Europe.

Clinical Trial Description

This study will evaluate the intracellular PK of TFV-DP and FTC-TP in Ghanaian HIV-infected adolescents with and without TB coinfection. As the clinical effects of TDF and FTC are related to the intracellular concentrations of the phosphate anabolites, called TFV-DP and FTC-TP, there is a need to understand the cellular pharmacology of TDF interactions in African HIV-infected adolescents with and without TB, as the study team cannot extrapolate from US patients not on antituberculosis (anti-TB) drugs. This study will enroll HIV-infected adolescents aged 10 to 18 years old with and without TB coinfection who are already established on ART. The study team hypothesize that younger age, adenosine triphosphate (ATP)-binding cassette subfamily C (ABCC) single nucleotide polymorphisms (SNPs) and anti-TB therapy may influence the intracellular TFV-DP and FTC-TP concentrations in adolescents. ;

Study Design

Related Conditions & MeSH terms

Acquired Immunodeficiency Syndrome
Coinfection
HIV Infections
Human Immunodeficiency Virus (HIV)
Tuberculosis

Clinical Trial Details

NCT number	NCT03800394
Study type	Observational
Source	University of Florida
Contact	Awewura Kwara, MD
Phone	352-273-9501
Email	awewura.kwara@medicine.ufl.edu
Status	Recruiting
Phase
Start date	January 28, 2019
Completion date	August 31, 2024

View Details

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Clinical trials are conducted in a series of steps, called phases - each phase is designed to answer a separate research question.

Phase 1: Researchers test a new drug or treatment in a small group of people for the first time to evaluate its safety, determine a safe dosage range, and identify side effects.
Phase 2: The drug or treatment is given to a larger group of people to see if it is effective and to further evaluate its safety.
Phase 3: The drug or treatment is given to large groups of people to confirm its effectiveness, monitor side effects, compare it to commonly used treatments, and collect information that will allow the drug or treatment to be used safely.
Phase 4: Studies are done after the drug or treatment has been marketed to gather information on the drug's effect in various populations and any side effects associated with long-term use.

Pharmacokinetics of Intracellular TFV-DP and FTC-TP in HIV-infected Adolescents

Clinical Trial Summary

Clinical Trial Description

Study Design

Related Conditions & MeSH terms