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TBTC Study 31: Rifapentine-containing Tuberculosis Treatment Shortening Regimens (S31/A5349)

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details.
ClinicalTrials.gov Identifier: NCT02410772
Recruitment Status : Active, not recruiting
First Posted : April 8, 2015
Last Update Posted : January 28, 2019
Sponsor:
Collaborator:
AIDS Clinical Trials Group
Information provided by (Responsible Party):
Centers for Disease Control and Prevention

Brief Summary:

The purpose of this study is to determine whether one or two four-month regimens of tuberculosis treatment are as effective as a standard six-month regimen for treatment of pulmonary tuberculosis (TB). All three regimens are administered daily, seven days each week, with direct observation of each dose by a health-care worker at least five of the seven days of each week.

The standard six-month regimen is two months of isoniazid, rifampin, ethambutol, and pyrazinamide followed by four months of isoniazid and rifampin.

The first short regimen is a single substitution of rifapentine for rifampin: two months of isoniazid, rifapentine, ethambutol, and pyrazinamide, followed by two months of isoniazid and rifapentine.

The second short regimen is a double substitution of rifapentine for rifampin and moxifloxacin for ethambutol: two months of isoniazid, rifapentine, moxifloxacin, and pyrazinamide, followed by two months of isoniazid, rifapentine, and moxifloxacin.

Target enrollment is 2500 participants. Each study participant will remain in the study for 18 months in order to include at least 12 months of evaluation of whether the participant's TB recurs.


Condition or disease Intervention/treatment Phase
Tuberculosis Drug: rifapentine Drug: rifapentine and moxifloxacin Drug: control Phase 3

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Detailed Description:

Title:

Rifapentine-containing treatment shortening regimens for pulmonary tuberculosis: a randomized, open-label, controlled, phase 3 clinical trial

Hypotheses:

A) Seventeen (17) week rifapentine-based regimen In previously untreated individuals with active drug-susceptible pulmonary tuberculosis treated with eight weeks of rifapentine (P), isoniazid (H), pyrazinamide (Z) and ethambutol (E) followed by nine weeks of rifapentine plus isoniazid, all given daily throughout, the proportion of participants who experience absence of cure (unfavorable outcome) will not be inferior to that observed in participants who are treated with a standard regimen (eight weeks of rifampin (R), isoniazid, pyrazinamide and ethambutol followed by eighteen weeks of rifampin plus isoniazid), all given daily throughout.

B) Seventeen (17) week rifapentine- plus moxifloxacin-containing regimen In previously untreated individuals with active drug-susceptible pulmonary tuberculosis treated with eight weeks of rifapentine, isoniazid, pyrazinamide and moxifloxacin (M), followed by nine weeks of rifapentine, isoniazid, and moxifloxacin, all given daily throughout, the proportion of participants who experience absence of cure (unfavorable outcome) will not be inferior to that observed in participants who are treated with a standard regimen (eight weeks of rifampin, isoniazid, pyrazinamide and ethambutol followed by eighteen weeks of rifampin plus isoniazid), all given daily throughout.

Phase: 3

Design: This will be an international, multicenter, randomized, controlled, open-label, 3-arm, phase 3 non-inferiority trial.

Population: Patients with newly diagnosed, previously untreated pulmonary tuberculosis.

Number of Sites: Multiple international sites, primarily sites of the Tuberculosis Trials Consortium and the AIDS Clinical Trials Group.

Study Duration: Duration per participant is approximately 18 months.

Description of Agent or Intervention: After written informed consent, participants will be randomly assigned to receive one of the following oral regimens:

Regimen 1 (control regimen): 2RHZE/4RH

  • Eight weeks of daily treatment with rifampin, isoniazid, pyrazinamide, and ethambutol, followed by
  • Eighteen weeks of daily treatment with rifampin and isoniazid

Regimen 2 (investigational regimen): 2PHZE/2PH

  • Eight weeks of daily treatment with rifapentine, isoniazid, pyrazinamide, and ethambutol, followed by
  • Nine weeks of daily treatment with rifapentine and isoniazid

Regimen 3 (investigational regimen): 2PHZM/2PHM

  • Eight weeks of daily treatment with rifapentine, isoniazid, pyrazinamide, and moxifloxacin, followed by
  • Nine weeks of daily treatment with rifapentine, isoniazid, and moxifloxacin

Objectives:

Primary:

  • To evaluate the efficacy of a rifapentine-containing regimen to determine whether the single substitution of rifapentine for rifampin makes it possible to reduce to seventeen weeks the duration of treatment for drug-susceptible pulmonary tuberculosis
  • To evaluate the efficacy of a rifapentine-containing regimen that in addition substitutes moxifloxacin for ethambutol and continues moxifloxacin during the continuation phase to determine whether it is possible to reduce to seventeen weeks the duration of treatment for drug-susceptible pulmonary tuberculosis

Secondary:

  • To evaluate the safety of the investigational regimens
  • To evaluate the tolerability of the investigational regimens
  • To collect and store biospecimens from consenting participants for the purpose of future research on discovery and validation of TB biomarkers
  • To determine the correlation of mycobacterial and clinical markers with time to culture conversion, culture status at completion of eight weeks of treatment, treatment failure, and relapse.
  • To conduct a pharmacokinetic/pharmacodynamic (PK/PD) study of the test drugs. The main objectives of the PK/PD study are to characterize study drug PK parameters and to determine relationships between treatment outcomes and PK parameters.
  • To evaluate the pharmacokinetics of efavirenz-based antiretroviral treatment among patients with TB/HIV co-infection taking efavirenz-based combination antiretroviral therapy and TB treatment with rifapentine

Endpoints:

Primary Endpoints:

  • Efficacy: TB disease-free survival at twelve months after study treatment assignment.
  • Safety: Proportion of participants with grade 3 or higher adverse events during study drug treatment

Secondary Endpoints:

  • TB disease-free survival at eighteen months after study treatment assignment
  • Time to stable sputum culture conversion (solid and liquid media considered separately)
  • Speed of decline of sputum viable bacilli by automated liquid MGIT culture days to detection
  • Proportion of participants who are culture negative at completion of eight weeks of treatment (solid and liquid media considered separately)
  • Sensitivity analyses assuming all participants classified as 'not assessable' have a favorable outcome
  • Discontinuation of assigned treatment for a reason other than microbiological ineligibility
  • Estimated steady state efavirenz PK parameters including mid-dosing interval concentration

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Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 2516 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)
Primary Purpose: Treatment
Official Title: Rifapentine-containing Treatment Shortening Regimens for Pulmonary Tuberculosis: A Randomized, Open-label, Controlled Phase 3 Clinical Trial. TBTC Study 31, ACTG Study A5349
Actual Study Start Date : January 25, 2016
Estimated Primary Completion Date : April 2020
Estimated Study Completion Date : December 2020

Resource links provided by the National Library of Medicine

MedlinePlus related topics: Tuberculosis

Arm Intervention/treatment
Active Comparator: Regimen 1

Eight weeks of daily treatment with rifampin, isoniazid, pyrazinamide, and ethambutol, followed by Eighteen weeks of daily treatment with rifampin and isoniazid

All drugs are administered orally, seven days/week, directly observed by a health care worker at least five of the seven days each week. Pyridoxine (vitamin B6), 25 or 50 mg, is administered with each study dose.

study drug doses: rifampin, 600 mg; isoniazid, 300 mg; pyrazinamide, < 55kg 1000 mg, >= 55-75 kg 1500 mg, >75 kg 2000 mg; ethambutol, < 55kg 800 mg, >= 55-75 kg 1200 mg, >75 kg 1600 mg

Drug: control
standard six-month treatment

Experimental: Regimen 2

Eight weeks of daily treatment with rifapentine, isoniazid, pyrazinamide, and ethambutol, followed by Nine weeks of daily treatment with rifapentine and isoniazid

All drugs are administered orally, seven days/week, directly observed by a health care worker at least five of the seven days each week. Pyridoxine (vitamin B6), 25 or 50 mg, is administered with each study dose.

study drug doses: rifapentine 1200 mg; isoniazid, 300 mg; pyrazinamide, < 55kg 1000 mg, >= 55-75 kg 1500 mg, >75 kg 2000 mg; ethambutol, < 55kg 800 mg, >= 55-75 kg 1200 mg, >75 kg 1600 mg

Drug: rifapentine
Regimen 2: Rifapentine is substituted for rifampin as the basis of 4-month treatment
Other Name: Priftin

Experimental: Regimen 3

Eight weeks of daily treatment with rifapentine, isoniazid, pyrazinamide, and moxifloxacin, followed by Nine weeks of daily treatment with rifapentine, isoniazid, and moxifloxacin

All drugs are administered orally, seven days/week, directly observed by a health care worker at least five of the seven days each week. Pyridoxine (vitamin B6), 25 or 50 mg, is administered with each study dose.

study drug doses: rifapentine 1200 mg; isoniazid, 300 mg; pyrazinamide, < 55kg 1000 mg, >= 55-75 kg 1500 mg, >75 kg 2000 mg; moxifloxacin, 400 mg

Drug: rifapentine and moxifloxacin
Regimen 3: In addition to the single substitution described for regimen 2, a second substitution is added, of moxifloxacin for ethambutol.
Other Name: Priftin and Avelox




Primary Outcome Measures :
  1. TB disease-free survival at twelve months after study treatment assignment [ Time Frame: twelve months after treatment assignment ]
  2. Proportion of participants with grade 3 or higher adverse events during study drug treatment [ Time Frame: four or six months ]

Secondary Outcome Measures :
  1. TB disease-free survival at eighteen months after study treatment assignment [ Time Frame: eighteen months after treatment assignment ]
  2. Proportion of participants who are culture negative at eight weeks [ Time Frame: eight weeks ]
    solid and liquid media considered separately

  3. Time to stable sputum culture conversion [ Time Frame: four or six months ]
    solid and liquid media considered separately

  4. Speed of decline of sputum viable bacilli by automated MGIT days to detection [ Time Frame: four or six months ]
  5. TB disease-free survival at twelve and eighteen months after study treatment assignment assuming all losses to follow-up and non-tuberculosis deaths have an unfavorable outcome [ Time Frame: eighteen months after study treatment assignment ]
    Sensitivity analyses assuming all losses to follow-up and non-tuberculosis deaths have an unfavorable outcome

  6. TB disease-free survival at twelve and eighteen months after study treatment assignment assuming all losses to follow-up and non-tuberculosis deaths have a favorable outcome [ Time Frame: eighteen months after study treatment assignment ]
    Sensitivity analyses assuming all losses to follow-up and non-tuberculosis deaths have a favorable outcome

  7. Discontinuation of assigned treatment for a reason other than microbiological ineligibility [ Time Frame: four or six months ]
  8. Efavirenz maximum concentration, area under the time-concentration curve, and half life [ Time Frame: four months ]
    Among participants with HIV infection receiving efavirenz-based antiretroviral therapy, these values will be used to estimate steady state efavirenz PK parameters including mid-dosing interval concentration



Information from the National Library of Medicine

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Ages Eligible for Study:   12 Years and older   (Child, Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No
Criteria

Inclusion Criteria:

  • Suspected pulmonary tuberculosis plus one or both of the following: a) at least one sputum specimen positive for acid-fast bacilli on smear microscopy OR b) at least one sputum specimen positive for M. tuberculosis by Xpert MTB/RIF testing, with semiquantitative result of 'medium' or 'high' and rifamycin resistance not detected.
  • Age twelve (12) years or older
  • A verifiable address or residence location that is readily accessible for visiting, and willingness to inform the study team of any change of address during the treatment and follow-up period.
  • Women of child-bearing potential who are not surgically sterilized must agree to practice a barrier method of contraception or abstain from heterosexual intercourse during study drug treatment.
  • Documentation of HIV infection status.
  • For HIV-positive individuals, CD4 T cell count greater than or equal to 100 cells/mm3 based on testing performed at or within 30 days prior to screening.
  • Laboratory parameters done at or within 14 days prior to screening:

    • Serum or plasma alanine aminotransferase (ALT) less than or equal to 3 times the upper limit of normal
    • Serum or plasma total bilirubin less than or equal to 2.5 times the upper limit of normal
    • Serum or plasma creatinine level less than or equal to 2 times the upper limit of normal
    • Serum or plasma potassium level greater than or equal to 3.5 meq/L
    • Hemoglobin level of 7.0 g/dL or greater
    • Platelet count of 100,000/mm3 or greater
  • For women of childbearing potential, a negative pregnancy test at or within seven (7) days prior to screening
  • Karnofsky score greater than or equal to 60
  • Written informed consent

Exclusion Criteria:

  • Pregnant or breast-feeding.
  • Unable to take oral medications.
  • Previously enrolled in this study.
  • Received any investigational drug in the past 3 months.
  • More than five (5) days of treatment directed against active tuberculosis within 6 months preceding initiation of study drugs.
  • More than five (5) days of systemic treatment with any one or more of the following drugs within 30 days preceding initiation of study drugs: isoniazid, rifampin, rifabutin, rifapentine, ethambutol, pyrazinamide, kanamycin, amikacin, streptomycin, capreomycin, moxifloxacin, levofloxacin, gatifloxacin, ofloxacin, ciprofloxacin, other fluoroquinolones, ethionamide, prothionamide, cycloserine, terizidone, para-aminosalicylic acid, linezolid, clofazimine, delamanid or bedaquiline.
  • Known history of prolonged QT syndrome.
  • Suspected or documented tuberculosis involving the central nervous system and/or bones and/or joints, and/or miliary tuberculosis and/or pericardial tuberculosis.
  • Current or planned use within six months following enrollment of one or more of the following medications: HIV protease inhibitors, HIV integrase inhibitors, HIV entry and fusion inhibitors, HIV non-nucleoside reverse transcriptase inhibitors other than efavirenz, quinidine, procainamide, amiodarone, sotalol, disopyramide, ziprasidone, or terfenadine. Individuals who are currently taking efavirenz-based antiretroviral treatment or for whom initiation of efavirenz-based antiretroviral treatment is planned within 17 weeks following enrollment may participate.
  • Weight less than 40.0 kg.
  • Known allergy or intolerance to any of the study medications.
  • Individuals will be excluded from enrollment if, at the time of enrollment, their M. tuberculosis isolate is already known to be resistant to any one or more of the following: rifampin, isoniazid, pyrazinamide, ethambutol, or fluoroquinolones.
  • Other medical conditions, that, in the investigator's judgment, make study participation not in the individual's best interest.
  • Current or planned incarceration or other involuntary detention.

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT02410772


  Show 33 Study Locations
Sponsors and Collaborators
Centers for Disease Control and Prevention
AIDS Clinical Trials Group
Investigators
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Study Chair: Susan Dorman, MD Medical University of South Carolina
Study Chair: Payam Nahid, MD, MPH University of California at San Francisco
Study Chair: Susan Swindells, MBBS University of Nebraska
Study Chair: Richard Chaisson, MD Johns Hopkins University
Study Chair: Ekaterina V Kurbatova, MD, PhD, MPH Centers for Disease Control and Prevention

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Responsible Party: Centers for Disease Control and Prevention
ClinicalTrials.gov Identifier: NCT02410772     History of Changes
Other Study ID Numbers: 6655
First Posted: April 8, 2015    Key Record Dates
Last Update Posted: January 28, 2019
Last Verified: November 2018
Individual Participant Data (IPD) Sharing Statement:
Plan to Share IPD: Yes
Plan Description: Data being collected in CDISC format.

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Studies a U.S. FDA-regulated Drug Product: Yes
Studies a U.S. FDA-regulated Device Product: No

Additional relevant MeSH terms:
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Tuberculosis
Mycobacterium Infections
Actinomycetales Infections
Gram-Positive Bacterial Infections
Bacterial Infections
Moxifloxacin
Rifampin
Ethambutol
Rifapentine
Norgestimate, ethinyl estradiol drug combination
Anti-Bacterial Agents
Anti-Infective Agents
Topoisomerase II Inhibitors
Topoisomerase Inhibitors
Enzyme Inhibitors
Molecular Mechanisms of Pharmacological Action
Antineoplastic Agents
Contraceptives, Oral, Combined
Contraceptives, Oral
Contraceptive Agents, Female
Contraceptive Agents
Reproductive Control Agents
Physiological Effects of Drugs
Antibiotics, Antitubercular
Antitubercular Agents
Leprostatic Agents
Nucleic Acid Synthesis Inhibitors
Cytochrome P-450 CYP2B6 Inducers
Cytochrome P-450 Enzyme Inducers
Cytochrome P-450 CYP2C8 Inducers