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CompletedNCT04065347Updated Aug 27, 2024

Quantification of Tenofovir Alafenamide Adherence (QUANTI-TAF)

An observational study in HIV/AIDS and Adherence, Medication, sponsored by University of Colorado, Denver. Completed at 1 site in United States. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2024-08-27.

Sponsored by University of Colorado, Denver · Observational

Study type
Observational
Model
Cohort
Time perspective
Prospective
Enrollment
84
Ages
18 Years and older
Sex
All
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Study summary

This study is being done to evaluate the relationship between adherence to antiretroviral therapy (ART) and HIV drug concentrations in persons living with HIV (PLWH) that are taking tenofovir alafenamide (TAF). Adherence will be measured with an ingestible biosensor (digital pill). Antiretroviral drug concentrations will be measured in different types of blood cells.

Read the detailed description

PLWH taking or initiating/re-initiating TAF will be recruited for a 16-week study. Upon entering the study, participants will be trained on the use the digital pill to objectively quantify adherence. Study participants already taking TAF will return every 4 weeks for a study visit where blood for drug concentrations will be obtained. Participants initiating/re-initiating TAF will return weekly for the first 4 weeks, at weeks 6 and 8, and every 4 weeks thereafter for a study visit where drug concentrations will be obtained.

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Conditions studied

  • HIV/AIDS
  • Adherence, Medication

Keywords

  • Adherence
  • Dried Blood Spots
  • Tenofovir-diphosphate
  • Antiretroviral therapy
  • Tenofovir alafenamide
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In context

Acquired Immunodeficiency Syndrome

2,099 studies on the registry are indexed under Acquired Immunodeficiency Syndrome; 273 are open to participants now.

This study's enrollment of 84 is below the median of 239 across 367 observational studies indexed under Acquired Immunodeficiency Syndrome.

Browse Acquired Immunodeficiency Syndrome studies →

Lead sponsor

University of Colorado, Denver is the lead sponsor of 1,538 studies on the registry; 318 are open to participants now.

Of its 146 completed or terminated interventional studies of FDA-regulated products, 92 (63%) have results posted.

Counted across the registry records on this site, refreshed daily.

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Who can participate

Ages eligible
18 Years and older
Sexes eligible
All
Accepts healthy volunteers
No
Sampling method
Non-probability sample

Study population

PLWH who are initiating/re-initiating or have been on TAF for > 6 months.

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  1. Females or males with HIV, able to give informed consent and comply with study procedures.
  2. Currently on (> 6 months), or planning to initiate/re-initiate TAF.

Exclusion criteria

Exclusion Criteria:

  1. For females of childbearing age, active pregnancy or any intent to become pregnant
  2. Hepatitis C (HCV) infection for which treatment is anticipated within the next 16 weeks after enrollment. Treated HCV with sustained virologic response is allowable if last dose of HCV antivirals was >12 months prior to enrollment
  3. Advanced renal (eGFR \<30 mL/min/1.73m**2) or liver (Child-Pugh B or C) disease
  4. History of extensive bowel surgery, gastric bypass, or gastroparesis
  5. Concomitant use of any prescription or non-prescription drug known (or with the potential) to significantly influence the PK of TAF (e.g. rifamycins, carbamazepine, phenytoin, St. John's Wort, tipranavir)
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Study design

Observational model
Cohort
Time perspective
Prospective
Enrollment
84 participants (actual)
Patient registry
No
Biospecimen retention
Samples with dna

Groups and cohorts

  • Group 1

    A total of 150 participants taking tenofovir alafenamide will be enrolled in this cohort.

    Device: Digital Pill

  • Group 2

    A total of 30 participants initiating/re-initiating tenofovir alafenamide will be enrolled in this cohort.

    Device: Digital Pill

Interventions

  • DeviceDigital Pill

    Digital Pill over encapsulating tenofovir alafenamide ART

    Also known as: etectRx ID-Cap System

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What researchers measure

Primary outcomes

  1. Tenofovir-diphosphate (TFV-DP) in Dried Blood Spots (DBS)

    Steady-state drug concentration distribution and quantiles for highly adherent (i.e. \>95% of ingestions) participants.

    Time frame: Week 12

  2. Tenofovir-diphosphate (TFV-DP) in Dried Blood Spots (DBS)

    Steady-state drug concentration distribution and quantiles for highly adherent (i.e. \>95% of ingestions) participants.

    Time frame: Week 16

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Study locations

1 site
  • University of Colorado
    Aurora, Colorado 80045, United States
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References and documents

Publications

  • Coyle RP, Morrow M, Mann SC, Mainella V, Ellis SL, Schwab S, Coppinger C, Barker N, Ellison L, Zheng JH, Al Zuabi S, Alpert PE, Carnes TC, Buffkin DE Jr, Chai PR, Bushman LR, Kiser JJ, MaWhinney S, Brooks KM, Anderson PL, Castillo-Mancilla JR. Tenofovir-Diphosphate and Emtricitabine-Triphosphate Adherence Benchmarks in Dried Blood Spots for Persons With HIV Receiving Tenofovir Alafenamide and Emtricitabine-Based Antiretroviral Therapy (QUANTI-TAF). Clin Infect Dis. 2024 Nov 22;79(5):1233-1241. doi: 10.1093/cid/ciae212. PubMed 38636950 ↗

Individual participant data

Plan to share: No

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Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Aug 27, 2024, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
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Registry details

Key details

Study ID
NCT04065347
Responsible party
Sponsor
First posted
Aug 22, 2019
Start date
Nov 21, 2019
Primary completion
May 16, 2023
Completion
May 16, 2023
Last update
Aug 27, 2024

Study contacts

Peter L Anderson, PharmD
principal investigator · University of Colorado-AMC

Oversight

Data monitoring committee
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is completed, as verified in Aug 2024. You cannot join it, but the record below documents what was studied.

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