Program for Rifampicin-Resistant Disease With Stratified Medicine for Tuberculosis

Last updated: October 1, 2025
Sponsor: University of California, San Francisco
Overall Status: Active - Recruiting

Phase

2/3

Condition

Lung Disease

Hiv

Treatment

Pretomanid

Moxifloxacin

Linezolid

Clinical Study ID

NCT06441006
24-41176
7200AA22CA00005 (USAID)
  • Ages > 14
  • All Genders

Study Summary

PRISM-TB is an international, seamless, multicenter, open-label, randomized, controlled, pragmatic, stratified medicine, treatment shortening, multi-arm multi-stage (MAMS), noninferiority Phase 2/3 clinical trial for fluoroquinolone-susceptible multidrug-resistant/rifampin-resistant pulmonary tuberculosis (FQ-S MDR/RR-TB). In Stage 1, participants will be randomized among one of three treatment arms (one control and two experimental). Following the interim analysis (at the end of Stage 1) based on DOOR outcome comparisons and the entirety of the data, one of the four possible experimental strategies will be identified and continue into Stage 2. In Stage 2, participants will be randomized among one of two treatment arms (one control and one experimental).

The trial objective is to identify, among participants with fluoroquinolone-susceptible multidrug-resistant/rifampicin-resistant tuberculosis (FQ-S MDR/RR-TB), the preferred BPaLM strategy of 13 or 17 weeks for participants stratified to receive shorter treatment and 17 or 24 weeks for participants stratified to receive longer treatment, as defined by a prespecified stratification algorithm, and to evaluate whether this BPaLM strategy has noninferior efficacy to the control strategy at Week 73.

Eligibility Criteria

Inclusion

Inclusion Criteria:

An individual must meet all of the following inclusion criteria at the time of enrollment in order to participate in this study:

  1. Confirmed fluoroquinolone-susceptible rifampicin-resistant pulmonary tuberculosis,based on sputum Xpert MTB/RIF and Xpert MTB/XDR, and/or other validated moleculartest, and/or phenotypic drug susceptibility testing. a. NOTE: TB diagnosis for purposes of meeting this inclusion criterion can be from astudy testing laboratory or from an outside laboratory.

  2. Aged ≥ 14 years.

  3. A verifiable address or residence location that is readily available for visiting,willingness to consent to home visits and phone calls, and willingness to inform thestudy team of any change of address during the treatment and follow-up period.

  4. Ability and willingness of individual to provide written informed consent or writtenconsent from a parent, guardian, or caregiver and assent of the child participantper local ethics committee guidance.

  5. Documentation of negative HIV infection status within 30 days prior to study entryor documentation confirming HIV infection at any time before study entry.

  6. For individuals with HIV: CD4+ cell count ≥ 50 cells/mm3 based on testing performedwithin 30 days prior to study entry.

  7. For individuals with HIV: Currently being treated with dolutegravir-basedantiretroviral therapy (ART), or plan to initiate dolutegravir-based ART at orbefore study week 8. a. NOTE: Dosing of ART and chemoprophylaxis for opportunistic infections should bereflective of local standard of care based on WHO or national guidelines. Thefollowing antiretrovirals are disallowed given significant drug-drug interactionswith bedaquiline: efavirenz, etravirine, all protease inhibitors, andcobicistat-boosted elvitegravir. The following antiretroviral is disallowed givenrisk of myelosuppression with linezolid: zidovudine.

  8. For individuals who are pregnant: at screening, evidence by ultrasound of a viablesingleton pregnancy with an estimated gestational age at enrollment of ≥ 14 weeks asper screening ultrasound.

  9. Chest radiograph obtained within 14 days prior to study entry.

Exclusion

Exclusion Criteria:

An individual meeting any of the following exclusion criteria at the time of enrollment or initiation of study drugs will be excluded from study participation:

  1. Known allergy/sensitivity, intolerance, or any hypersensitivity to components ofstudy TB drugs or their formulation.

  2. One or more of the following laboratory parameters:

  3. Absolute neutrophil count (ANC) < 1000/mm3.

  4. Hemoglobin level < 8.0 g/dL.

  5. Serum or plasma alanine aminotransferase (ALT) or aspartate aminotransferase (AST) ≥ 3 times the upper limit of normal.

  6. Serum or plasma total bilirubin ≥ 3 times the upper limit of normal.

  7. Serum or plasma creatinine level ≥ 3 times the upper limit of normal.

  8. Evidence of laboratory values consistent with or equivalent to grade 4 toxicity (i.e., potentially life-threatening).

  9. NOTE: Persons found not to be eligible due to laboratory abnormalities may bereevaluated within the screening window.

  10. QTcF interval ≥ 480 ms within 5 days prior to study entry.

  11. One or more risk factors for QT prolongation (apart from age and sex) or otheruncorrected risk factors for torsades de pointes: evidence of ventricularpre-excitation (Wolff-Parkinson-White syndrome); electrocardiographic evidence ofeither complete left bundle branch block or right bundle branch block, or incompleteleft bundle branch block or right bundle branch block and QRS complex duration ≥ 120ms on at least one ECG; current pacemaker implant; congestive heart failure;evidence of second- or third-degree heart block; bradycardia defined by sinus rateless than 50 bpm; personal or family history of long QT syndrome; personal historyof arrhythmic cardiac disease, with the exception of sinus arrhythmia; personalhistory of syncope (i.e., cardiac syncope not including syncope due to vasovagal orepileptic causes).

  12. Current grade 2 or higher peripheral neuropathy. a. NOTE: Peripheral neuropathy assessment must be obtained within 7 days prior tostudy entry.

  13. Documentation of Karnofsky Performance Status Score < 50 obtained within 14 daysprior to study entry.

  14. Known resistance to bedaquiline, pretomanid, delamanid, linezolid, orfluoroquinolones.

  15. Previous use of any second-line anti-TB drugs for more than 14 days during the 12months prior to the screening visit date.

  16. Known or presumed central nervous system TB, osteoarticular TB, ormiliary/disseminated TB in the current TB episode.

  17. Taking any medication that is contraindicated with study medicines which cannot bestopped (with or without replacement) or requires a washout period longer than 2weeks.

  18. Any condition (social or medical or psychological) which, in the opinion of theinvestigator, would make participation unsafe or interfere with adherence to studyrequirements.

  19. Current enrollment in other therapeutic trials will not be eligible. a. NOTE:Current enrollment of index cases in prevention trials will be allowed on acase-by-case basis, provided that the prevention trial does not include atherapeutic intervention that could affect response to TB treatment.

All persons who are not eligible for the PRISM-TB trial will be managed according to local routine practice and may enroll in other studies.

Criteria for Exclusion after Entry ('Late Exclusion'):

Enrolled individuals who are subsequently determined to meet the following criteria will be classified as 'late exclusions' and study treatment will be discontinued:

  1. Bedaquiline, pretomanid, delamanid, linezolid, or fluoroquinolone resistance on phenotypic or molecular drug- susceptibility testing from samples collected up to 4 weeks after randomization.

Study Design

Total Participants: 400
Treatment Group(s): 6
Primary Treatment: Pretomanid
Phase: 2/3
Study Start date:
November 01, 2025
Estimated Completion Date:
August 31, 2031

Study Description

At least 200 participants across three treatment arms (67 in each arm) will be enrolled in Stage 1 and at least an additional 200 participants across two treatment arms (100 in each arm) will be enrolled in Stage 2.

Stage 1: After written informed consent, participants with FQ-S MDR/RR-TB will be randomly assigned to receive one of Stage 1 Strategies 1-3.

Stage 1 Strategy 1 (control strategy): Control regimen for all with FQ-S MDR/RR-TB. The local standard of care (SOC) regimen consistent with preferred regimen(s) in international guidelines. In most cases this will be 24 weeks of bedaquiline, pretomanid, linezolid, and moxifloxacin (6BPaLM). Doses and durations of each component may change based on the latest international guidelines and the local SOC.

Stage 1 Strategy 2 (investigational strategy): 4BPaLM for all with FQ-S MDR/RR-TB. 17 weeks of bedaquiline, pretomanid, linezolid, and moxifloxacin (4BPaLM).

Stage 1 Strategy 3 (investigational strategy): 3BPaLM or 6BPaLM stratified medicine strategy for FQ-S MDR/RR-TB. 13 weeks of bedaquiline, pretomanid, linezolid, and moxifloxacin (3BPaLM) for participants stratified to receive shorter treatment and 24 weeks of bedaquiline, pretomanid, linezolid, and moxifloxacin (6BPaLM) for participants stratified to receive longer treatment.

Stage 2: After written informed consent, participants with FQ-S MDR/RR-TB will be randomly assigned to receive one of the Stage 2 Strategies 1-2.

Stage 2 Strategy 1 (control strategy): Control regimen for all with FQ-S MDR/RR-TB. The local standard of care (SOC) regimen consistent with preferred regimen(s) in international guidelines. In most cases this will be 24 weeks of bedaquiline, pretomanid, linezolid, and moxifloxacin (6BPaLM). Doses and durations of each component may change based on the latest international guidelines and the local SOC.

Stage 2 Strategy 2 (investigational strategy): Preferred strategy from Stage 1 for FQ-S MDR/RR-TB. Number of weeks of bedaquiline, pretomanid, linezolid, and moxifloxacin (BPaLM) for participants stratified to receive shorter treatment and for participants stratified to receive longer treatment to be determined from the preferred strategy identified in Stage 1.

The sites listed below are the planned sites for Stage 1 and/or Stage 2.

Connect with a study center

  • Institute of Phthisiopneumology Chiril Dragniuc

    Chisinau,
    Moldova, Republic of

    Site Not Available

  • National Center for Communicable Diseases

    Ulaanbaatar,
    Mongolia

    Site Not Available

  • National Center for Communicable Diseases

    Ulaanbaatar 2028462,
    Mongolia

    Active - Recruiting

  • Institute of Chest Disease

    Kotri,
    Pakistan

    Site Not Available

  • Institute of Chest Diseases

    Kotri,
    Pakistan

    Site Not Available

  • Institute of Chest Diseases

    Kotri 1172904,
    Pakistan

    Site Not Available

  • Civil Hospital Mirpurkhas

    Mirpur,
    Pakistan

    Site Not Available

  • Hospital Nacional Hipólito Unanue

    Lima,
    Peru

    Site Not Available

  • Hospital Nacional Sergio E. Bernales

    Lima,
    Peru

    Site Not Available

  • Policlínico SES

    Lima,
    Peru

    Site Not Available

  • Hospital Nacional Sergio E. Bernales

    Lima 3936456,
    Peru

    Site Not Available

  • Policlínico SES

    Lima 3936456,
    Peru

    Site Not Available

  • TB HIV Research Unit at De La Salle Medical and Health Sciences Institute

    Dasmariñas,
    Philippines

    Site Not Available

  • King Dinuzulu Hospital Complex

    Durban,
    South Africa

    Site Not Available

  • Perinatal HIV Research Unit Matlosana

    Klerksdorp,
    South Africa

    Site Not Available

  • Isango Lethemba TB Research Unit at Jose Pearson TB Hospital

    Port Elizabeth,
    South Africa

    Site Not Available

  • Mulago National Referral Hospital

    Kampala,
    Uganda

    Site Not Available

  • Mulago National Referral Hospital

    Kampala 232422,
    Uganda

    Site Not Available

  • Hanoi Lung Hospital

    Hanoi,
    Vietnam

    Site Not Available

  • Hanoi Lung Hospital

    Hanoi 1581130,
    Vietnam

    Site Not Available

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