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HIV InfectionsPhase 2RADIANT-TBNCT03851588

Standard Versus Double Dose Dolutegravir in Patients With HIV-associated Tuberculosis

A Phase 2 study testing Dolutegravir 50 mg in people with HIV Infections and Tuberculosis, run by University of Cape Town at 1 site in South Africa.

Completed

Finished. The study has ended and is not enrolling. Results may be posted on the official record.

Official record
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Trial summary

The investigators propose to conduct a phase 2 randomised (1:1) double-blind placebo-controlled trial of the dolutegravir-lamivudine-tenofovir fixed dose combination tablet daily with an additional 50 mg dose of dolutegravir/matching placebo taken 12 hours later in ART-naïve or fisrt-line interrupted HIV-infected… Read more about this study

Who is it for?
Ages 18 to 110 years
Conditions the study is for
HIV Infections, Tuberculosis
What is being tested?
Dolutegravir 50 mg
Type of treatment
Pill or oral medicine
Could I receive a placebo?
Yes, some participants may receive a placebo
How many people
108 participants
Where
1 siteSouth Africa
Study dates
19 Dec 2019to 28 Jun 2022
Phase
Phase 2
Are there results?
Yes, posted in the registrySummary in the doctors' view

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 18 to 110 years
  • All sexes
  • No healthy volunteers
  • Adult, Older adult

Who may be able to join

  • HIV-1 infection as documented by screening plasma HIV-1 RNA >1000 c/mL
  • ART-naïve (short-term antiretroviral use for prevention of mother-to-child transmission will be allowed) or
  • ART treatment interrupters on ART <6 months prior to interruption or virologically suppressed (<50 copies/mL or LDL) <6 months prior to interruption
  • On rifampicin-based therapy for tuberculosis for <3 months
  • CD4 counts >100 cells/µL
  • Women of child-bearing potential willing to use adequate contraception (defined as either an intrauterine contraceptive device or hormonal contraception as per national guidelines)

Who cannot join

  • Pregnant/breastfeeding
  • Estimated glomerular filtration rate (eGFR) <60 mL/min/1.73 m2 (calculated by the Modification of Diet in Renal Disease (MDRD) study)
  • Alanine aminotransferase >3 times upper limit of normal (ULN)
  • Allergy or intolerance to one of the drugs in regimen
  • Concomitant medication known to significantly reduce or increase dolutegravir exposure (except rifampicin)
  • Active psychiatric disease or substance abuse
Show all 9Show fewer
  • On treatment for active AIDS-defining condition other than tuberculosis (participants on maintenance therapy may be enrolled)
  • Malignancy
  • Any other clinical condition that in the opinion of an investigator puts the patient at increased risk of participating in the study.

Trial locations and contacts

1 site in 1 country.

South Africa1 site
  • Khayelitsha Site B/Ubuntu Clinic

    Cape Town, Western Cape, 8001

Other trials in South Africa

About this study

Official title: Standard Versus Double Dose Dolutegravir in Patients With HIV-associated Tuberculosis: a Phase 2 Non-comparative Randomised Controlled Trial

The investigators propose to conduct a phase 2 randomised (1:1) double-blind placebo-controlled trial of the dolutegravir-lamivudine-tenofovir fixed dose combination tablet daily with an additional 50 mg dose of dolutegravir/matching placebo taken 12 hours later in ART-naïve or fisrt-line interrupted HIV-infected patients on rifampicin-based anti-tuberculosis therapy. The hypothesis is that virologic outcomes with standard dose dolutegravir-based ART will be acceptable in patients on rifampicin-based anti-tuberculosis therapy.

Read the detailed description

Dolutegravir is being rolled out to replace efavirenz in first-line antiretroviral therapy (ART) in low-middle income countries (LMICs) because it is more effective, better tolerated, and has a considerably higher genetic barrier to resistance.

Tuberculosis is the commonest cause of HIV-related morbidity and mortality in LMICs. Rifampicin, which is a key component of anti-tuberculosis therapy, induces genes that are important in the metabolism and transport of dolutegravir. The resulting drug-drug interaction between dolutegravir and rifampicin significantly reduces dolutegravir exposure, which can be overcome by increasing the dose of dolutegravir to 50 mg 12 hourly.

The additional dose of dolutegravir will be difficult to implement in high burden settings. Furthermore, the additional dolutegravir tablet increases pill burden and costs. If standard dose dolutegravir is shown to be effective in patients with tuberculosis this would sweep away one of the major barriers to its implementation in LMICs. There are three lines of evidence to support studying standard dose dolutegravir in patients with HIV-associated tuberculosis.

First, there are compelling pharmacokinetic and pharmacodynamic data supporting the therapeutic efficacy of lower dolutegravir exposure. Second, the investigators have conducted a drug-drug interaction study of dolutegravir dosed at 50 mg or 100 mg once daily in healthy volunteers with rifampicin. Although, as expected, concomitant rifampicin significantly reduced dolutegravir exposure at both doses, all dolutegravir trough concentrations on rifampicin were above the protein-adjusted 90% inhibitory concentration (PA IC90). Third, exposure to the first-generation integrase inhibitor raltegravir is also significantly reduced with concomitant rifampicin. A phase 2 study in patients with HIV-associated tuberculosis showed that virologic outcomes were similar with standard and double dose raltegravir. It is plausible that findings could be similar with dolutegravir.

The hypothesis is that virologic outcomes with standard dose dolutegravir-based ART will be acceptable in patients on rifampicin-based anti-tuberculosis therapy. If the proportion of participants who achieve virological suppression on standard dose dolutegravir is acceptable, this would pave the way for a phase 3 trial of dolutegravir 50 mg daily versus an appropriate standard of care regimen, like efavirenz-based ART, in patients with HIV-associated tuberculosis.

Being tested
Placebo, Dolutegravir 50 mg
Keywords
Antiretroviral therapy, Dolutegravir, Rifampicin, Tuberculosis, Drug-drug interaction
Medical subject headings
HIV Infections, Tuberculosis

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • PlaceboOther

    Dolutegravir-lamivudine-tenofovir fixed-dose combination tablet daily is not given with a supplementary dose of dolutegravir 50 mg.

  • Dolutegravir 50 mgDrug

    Also called Tivicay 50 mg

    Dolutegravir-lamivudine-tenofovir fixed-dose combination tablet daily is given with a supplementary dose of dolutegravir 50 mg.

Study groups in NCT03851588
Study groupRoleWhat they receive
Supplementary doseActive comparatorDolutegravir-lamivudine-tenofovir fixed-dose combination tablet daily with an additional dolutegravir 50 mg dose taken 12 hours later.
Receives: Drug: Dolutegravir 50 mg
Placebo dosePlacebo comparatorDolutegravir-lamivudine-tenofovir fixed-dose combination tablet daily with placebo taken 12 hours later.
Receives: Other: Placebo

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Virological Suppression at 24 Weeks

    Proportion with HIV viral load <50 copies/mL at 24 weeks analysed by modified intention to treat (ITT), which includes all participants who received at least one dose of dolutegravir, and according to the FDA snapshot algorithm.

    Measured: 24 weeks

Secondary outcomes (13)
  1. Virological Suppression at 12 Weeks (Modified ITT)

    Proportion with HIV viral load <50 copies/mL at 12 weeks analyzed modified ITT.

    Measured: 12 weeks

  2. Virological Suppression at 24 Weeks (Per Protocol)

    Proportion with HIV viral load <50 copies/mL at 24 weeks analyzed per protocol.

    Measured: 24 weeks

  3. Virological Suppression at 48 Weeks (Modified ITT)

    Proportion with HIV viral load <50 copies/mL at 48 weeks analyzed modified ITT.

    Measured: 48 weeks

  4. Virological Suppression at 48 Weeks (Per Protocol)

    Proportion with HIV viral load <50 copies/mL at 48 weeks analyzed per protocol.

    Measured: 48 weeks

  5. CD4 Change at 24 Weeks

    Change in CD4 count from screening at week 24.

    Measured: 24 weeks

  6. Dolutegravir Trough Concentrations

    Proportion with dolutegravir trough concentrations above the PA IC90 at week 24

    Measured: 24 weeks

  7. Grade 3 or 4 Adverse Events

    Grade 3 or 4 drug-related adverse events will be accessed throughout the trial.

    Measured: 48 weeks

  8. Change in Sleep Assessment From Baseline - Any Treatment Emergent Insomnia After Baseline Assessed at 4 Weekly Intervals Until Week 24 and Then Again at Week 48

    Insomnia severity index (ISI scored from 0-28. Score categories: 0-7, no clinical significant insomnia; 8-14, sub-threshold insomnia; 15-21, clinical insomnia (moderate severity); 22-28, clinical insomnia (severe). Measures sleep patterns and how this influences daily functioning and quality of life (assessed through 48 weeks). Measure of participants with treatment emergent insomnia from baseline

    Measured: Through 48 weeks

  9. Change in Mental Health Assessment From Baseline Through Week 48

    Modified MINI screen (MMS) Mental health questionnaire will be assessed by given at baseline, 12 weeks, 24 weeks, and 48 weeks. The questionnaire is standardized and has been based on the mini international neuropsychiatric interview (version 7.0.0). All questions in the questionnaire require a yes/no answer.

    MMS score increased is worsening MMS includes 22 questions answered yes/no; 2 questions related to experiencing a traumatic event were excluded for a 20 point scale.

    MMS was measured at baseline, week 12, and week 24

    Presenting number of participants with increase in MMS of at least 1 point from baseline through 48 weeks.

    Measured: Through 48 weeks

  10. Serious Adverse Events

    Document any serious adverse events that occur throughout the trial.

    Measured: 48 weeks

  11. Adverse Events Requiring Discontinuation of an ART Drug

    Any adverse event that requires discontinuation of any drug in the ART regimen throughout the trial.

    Measured: 48 weeks

  12. Antiretroviral Resistance Mutations Testing by Genotypic Resistance Assay in Participants With Virologic Failure

    If a viral load is >1000 copies/mL at week 24 or at week 48, or if the viral load was suppressed and then rebounded to >1000 copies/mL, a sample will be taken for resistance testing. Antiretroviral resistance mutations in participants with virologic failure will be assessed by genotypic resistance assay and compared to stored plasma at baseline to distinguish emergent from pre-treatment resistance.

    Any ART resistance mutations in participants with virological failure by week 48.

    Measured: Through 48 weeks

  13. Primary Outcome Differences Among ART-naïve Versus First-line Interruption Status

    The primary outcome measure (proportion with HIV viral load <50 copies/mL at 24 weeks analysed by modified intention to treat (ITT), which includes all participants who received at least one dose of dolutegravir, and according to the FDA snapshot algorithm) will be stratified by ART-naïve versus first-line interruption status.

    Measured: 24 weeks

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted22 Feb 2019
  2. Study start19 Dec 2019
  3. Primary completion20 Jan 2022
  4. Study completion28 Jun 2022

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase 2
Primary purpose
Treatment
Allocation
Randomised
Intervention model
Parallel groups
Model description
Parallel assignment of randomised groups with stratification by ART-naïve versus first-line interrupter status
Masking
Triple blind
Who is masked
Participant, Care provider, Investigator
Enrolment
108 participants (actual)
IDs, dates and publications
ClinicalTrials.gov ID
NCT03851588
Sponsor's protocol ID
CIDRI003
Acronym
RADIANT-TB
Status last verified
Jun 2024
First submitted
15 Feb 2019
Last updated
18 Jul 2024
Data monitoring committee
Yes
FDA-regulated drug
No
FDA-regulated device
No
Individual data sharing
Yes: Data will be shared with other organizations or individuals for further research upon a reasonable request to the University of Cape Town PI, provided that certain conditions are met (including but not limited to the ethical standards upheld by HREC that approved the initial study.

Publications

  • Griesel R, Zhao Y, Simmons B, Omar Z, Wiesner L, Keene CM, Hill AM, Meintjes G, Maartens G. Standard-dose versus double-dose dolutegravir in HIV-associated tuberculosis in South Africa (RADIANT-TB): a phase 2, non-comparative, randomised controlled trial. Lancet HIV. 2023 Jul;10(7):e433-e441. doi: 10.1016/S2352-3018(23)00081-4. Epub 2023 May 22.

    PubMed 37230101
  • Griesel R, Hill A, Meintjes G, Maartens G. Standard versus double dose dolutegravir in patients with HIV-associated tuberculosis: a phase 2 non-comparative randomised controlled (RADIANT-TB) trial. Wellcome Open Res. 2021 Jan 11;6:1. doi: 10.12688/wellcomeopenres.16473.1. eCollection 2021.

    PubMed 33954265

Questions about this trial

What is this clinical trial studying?

A Phase 2 study testing Dolutegravir 50 mg in people with HIV Infections and Tuberculosis, run by University of Cape Town at 1 site in South Africa.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 6 inclusion and 9 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: finished, as of the sponsor's last update on 18 Jul 2024. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 1 site in South Africa. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. Some participants in this study may receive a placebo. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

What does this phase mean?

Phase 2 studies give the treatment to a larger group to see whether it has the intended effect and to keep checking safety.

Not every study follows the same path, and some studies (observational studies, device studies) have no phase.

Are results available for this study?

Yes. Results are posted in the registry (first posted 18 Sep 2023). A summary is in the For doctors view, and the full results are on ClinicalTrials.gov.

How can a doctor refer a patient or contact the research team?

The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Virological Suppression at 24 Weeks (time frame: 24 weeks). It is what the study was designed to measure, not a finding.

Where can I read the original study information?

On the ClinicalTrials.gov record for NCT03851588, which also lists 2 linked publications.

Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 18 Jul 2024.

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