PanACEA DElpazolid Dose-finding and COmbination DEvelopment (DECODE) (DECODE)

A Phase IIb, Open Label, Randomized Controlled Dose Ranging Multi-Center Trial to Evaluate the Safety, Tolerability, Pharmacokinetics and Exposure-Response Relationship of Different Doses of Delpazolid in Combination With Bedaquiline Delamanid Moxifloxacin in Adult Subjects With Newly Diagnosed, Uncomplicated, Smear-Positive, Drug-sensitive Pulmonary Tuberculosis

This trial is to describe the safety, tolerability and exposure-toxicity relationship of Depazolid given over 16 weeks, in combination with standard-dose Bedaquiline, Delamanid and Moxifloxacin, compared to standard-dose Bedaquiline, Delamanid and Moxifloxacin alone

Study Overview

• Status: Completed
• Conditions: Pulmonary Tuberculosis; Infections and Infestations
• Intervention / Treatment: Drug: Bedaquiline, Delamanid, Moxifloxacin; Drug: Delpazolid

Detailed Description

This will be an open label Phase IIb dose-finding, randomized, controlled study with a duration of 16 weeks of experimental therapy of Delpazolid(DZD) - Bedaquiline/Delamanid/ Moxifloxacin (BDM) in adult patients with newly diagnosed, smear positive, uncomplicated, drug sensitive pulmonary tuberculosis (TB) to evaluate the safety, efficacy, tolerability, pharmacokinetics and exposure/response-relationship of different doses of delpazolid in combination with bedaquiline, delamanid and moxifloxacin.

Participants will be randomized to one of five arms containing BDM standard dose with different doses of DZD.

• Study Type: Interventional
• Enrollment (Actual): 76
• Phase: Phase 2

Contacts and Locations

Study Locations

• South Africa
  • Johannesburg, South Africa, 2092
    • Clinical HIV Research Unit (CHRU) University of the Witwatersrand
  • Gauteng
    • Tembisa, Gauteng, South Africa, 1632
      • The Aurum Institute Tembisa Clinical Research Centre
• Tanzania
  • Bagamoyo, Tanzania
    • Ifakara Health Institute
  • Mbeya, Tanzania
    • National Institute for Medical Research (NIMR-MMRC)
  • Moshi, Tanzania
    • Ki'bongoto Infectious Disease Hospital (KIDH) Kilimanjaro Clinical Research Institute (KCRI)

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 18 years to 65 years (Adult, Older Adult)
• Accepts Healthy Volunteers: No

Description

Inclusion Criteria:

1. Provide written, informed consent prior to all trial-related procedures including HIV testing.
2. Male or female, aged between 18 and 65 years, inclusive.
3. Body weight between 40 and 90 kg, inclusive.
4. Newly diagnosed, previously untreated, drug susceptible pulmonary TB: presence of MTB complex and rapid molecular tests result confirming susceptibility to RIF and INH such as GeneXpert and/or HAIN MTBDR plus.
5. A chest X-ray (no older than 2 weeks) which, in the opinion of the Investigator, is consistent with TB.
6. Sputum positive on microscopy from concentrated sputum for acid-fast bacilli on at least one sputum sample (at least 1+ on the IUATLD/WHO scale).
7. The participant is willing to forgo consumption of foods high in tyramine for the period of taking study medication (See Appendix, section 20.2, page 92).

8. The participant is either unable to conceive/father children AND/OR his/her partner is unable to conceive/father children AND/OR they will consent to be using effective methods of contraception when engaging in heterosexual intercourse, as defined below:

   a. Non-childbearing potential: i. Female participant/sexual partner of male participant: Bilateral oophorectomy, and/or hysterectomy or bilateral tubal ligation more than 12 months ago and/or has been postmenopausal with a history of no menses for at least 12 consecutive months ii. Male participant/sexual partner of female participant: Vasectomised or has had a bilateral orchidectomy minimally three months prior to screening iii. Male participants having a pregnant female partner or a male sexual partner: At least one barrier method has to be used in this case. b. Effective contraception methods: i. Female participants: Two methods, including methods that the patient's sexual partner(s) use. At least one must be a barrier method. Contraception must be practised for at least until 12 weeks after the last dose of DZD. ii. Male participants: Two methods, including methods that the patient's female sexual partner(s) use. At least one must be a barrier method. Effective contraception must be ensured for at least 16 weeks after the last dose of DZD.

Note: hormone-based contraception alone may not be reliable when taking RIF during continuation phase; therefore, hormone-based contraceptives alone cannot be used by female participants/female partners of male participants to prevent pregnancy.

Exclusion Criteria:

1. Circumstances that raise doubt about free, unconstrained consent to study participation (e.g. prisoner or mentally handicapped person)
2. Poor general condition where delay in treatment cannot be tolerated or death within four months is likely.
3. Poor social condition which would make it unlikely that the patient would be able to complete follow-up
4. The patient is pregnant or breast-feeding.

5. The patient is infected with HIV with a CD4 count <220 cells/mm3. If >220 cells/mm3, patients will be included only if any of the following is applicable:

   • The patient is antiretroviral (ARV) naïve and able to postpone commencing HIV treatment for 2 months after the trial has started and then restrict regimens to those containing dolutegravir (see section 12.6.2 on ARVs) or The patient is ARV experienced (has been on ARV´s a minimum of 5 months) and able to switch to a dolutegravir-based regimen.
   • The patient is treated with nucleosidic reverse transcriptase inhibitors (are permitted as concomitant medication).
   • The patient is treated with protease inhibitors as part of antiretroviral treatment regimens, which will be stopped at least 3 days before the start of study treatment (WK01, day1) for a patient to be eligible.
   • The patient is treated with Efavirenz as part of antiretroviral treatment regimens which would have to be stopped 14 days before the start of study treatment (WK00, Day 01) for a patient to be eligible.
6. The patient has a known intolerance to any of the study drugs or concomitant disorders or conditions for which study drugs or standard TB treatment are contraindicated

7. The patient has a history of, or current evidence of clinically relevant cardiovascular metabolic, gastrointestinal, neurological, psychiatric or endocrine diseases, malignancy, or any other condition that will influence treatment response, study adherence or survival in the judgement of the investigator, especially:

   1. Neuropathy, or significant psychiatric disorder like depression or schizophrenia; especially if treatment for those has ever been required or is anticipated to be required
   2. Clinically significant evidence of extra-pulmonary TB (e.g. miliary TB, TB meningitis, but not limited lymph node involvement)
   3. Serious lung conditions other than TB, or significant respiratory impairment in the discretion of the investigator
   4. Any diabetes mellitus
   5. Cardiovascular disease such as myocardial infarction, heart failure, coronary heart disease, arrhythmia, tachyarrhythmia, or pulmonary hypertension
   6. Arterial hypertension (systolic blood pressure ≥140 mmHg and/or diastolic blood pressure of ≥90 mmHg on two occasions during screening).
   7. Long QT syndrome or family history of long QT syndrome or sudden death of unknown or cardiac-related cause
   8. Alcohol or other drug abuse that is sufficient to significantly compromise the safety or cooperation of the patient, that includes substances prohibited by the protocol or has led to significant organ damage at the discretion of the investigator.

8. Any of the following laboratory findings at screening:

   1. Serum amino aspartate transferase (AST) and/or alanine aminotransferase (ALT) >3x the upper limit of normal (ULN),
   2. Serum alkaline phosphatase or y-glutamyl transferase > 2.5x the ULN,
   3. Serum total bilirubin level >1.5x the ULN
   4. Estimated creatinine clearance (eCrCl; using the Cockroft and Gault formula [57] lower than 30 ml/min
   5. Serum albumin < 2.8 mg/dl
   6. Haemoglobin level <7.0 g/dl
   7. Platelet count <50,000/mm3
   8. Serum potassium below the lower level of normal for the laboratory
   9. Blood glucose at screening of less than 70mg/dL (3.9mmol/L)

9. ECG findings in the screening ECG: (one or more):

   1. QTcF of >0.450 s
   2. Atrioventricular (AV) block with PR interval > 0.20 s,
   3. QRS complex > 120 milliseconds
   4. Any other changes in the ECG that are clinically relevant as per discretion of the investigator

10. Restricted medication:

    1. Treatment with any other investigational drug within 1 month prior to enrolment or enrolment into other clinical (intervention) trials during participation.
    2. Previous anti-TB treatment with drugs active against MTB within the last 3 months prior to screening.

    3. Unable or unwilling to abide by the requirements regarding restricted medication or have taken restricted medication as described under section 12.6, page 58. Restricted medication includes the following drug classes:

       • Anti-TB drugs other than study drugs
       • Medication that lowers the threshold for epileptic seizures
       • Medication that prolongs the QTc interval
       • Drugs that affect monoaminooxidase or serotonin metabolism
       • CYP 450 inhibitors or inducers, including grapefruit containing foods / beverages and St. John's Wort

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: Randomized
• Interventional Model: Parallel Assignment
• Masking: None (Open Label)

Number of Arms

5

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Active Comparator: Arm1(D0); Participants receive the following medication for the duration of 16weeks together with food.; Delpazolid : Will not administered; Bedaquiline: will be dosed as per the licensed dose: 400 mg orally once daily for the first 14 days, then 200 mg three times a week.; Delamanid: will be dosed as per the licensed dose: 200 mg orally twice daily doses of 100 mg.; Moxifloxacin: will be dosed as per the licensed dose: 400 mg orally once daily	Drug: Bedaquiline, Delamanid, Moxifloxacin; These three licensed drugs form the backbone of a new regimen to which delpazolid is added in arms 2-5.; Other Names: BDM
Experimental: Arm2(D400); Participants receive the following medication for the duration of 16weeks together with food.; Delpazolid : Will be dosed 400 mg orally once daily; Bedaquiline: will be dosed as per the licensed dose: 400 mg orally once daily for the first 14 days, then 200 mg three times a week.; Delamanid: will be dosed as per the licensed dose: 200 mg orally twice daily doses of 100 mg.; Moxifloxacin: will be dosed as per the licensed dose: 400 mg orally once daily	Drug: Bedaquiline, Delamanid, Moxifloxacin; These three licensed drugs form the backbone of a new regimen to which delpazolid is added in arms 2-5.; Other Names: BDM; Drug: Delpazolid; Delpazolid is not licensed yet. Current experience in humans upto Phase IIA. Dose according to randomization to dosing arms 2-5.; Other Names: LCB01-0371
Experimental: Arm3(D800-OD); Participants receive the following medication for the duration of 16weeks together with food.; Delpazolid : Will be dosed 800 mg orally once daily; Bedaquiline: will be dosed as per the licensed dose: 400 mg orally once daily for the first 14 days, then 200 mg three times a week.; Delamanid: will be dosed as per the licensed dose: 200 mg orally twice daily doses of 100 mg.; Moxifloxacin: will be dosed as per the licensed dose: 400 mg orally once daily	Drug: Bedaquiline, Delamanid, Moxifloxacin; These three licensed drugs form the backbone of a new regimen to which delpazolid is added in arms 2-5.; Other Names: BDM; Drug: Delpazolid; Delpazolid is not licensed yet. Current experience in humans upto Phase IIA. Dose according to randomization to dosing arms 2-5.; Other Names: LCB01-0371
Experimental: Arm4(D1200); Participants receive the following medication for the duration of 16weeks together with food.; Delpazolid : Will be dosed 1200 mg orally once daily; Bedaquiline: will be dosed as per the licensed dose: 400 mg orally once daily for the first 14 days, then 200 mg three times a week.; Delamanid: will be dosed as per the licensed dose: 200 mg orally twice daily doses of 100 mg.; Moxifloxacin: will be dosed as per the licensed dose: 400 mg orally once daily	Drug: Bedaquiline, Delamanid, Moxifloxacin; These three licensed drugs form the backbone of a new regimen to which delpazolid is added in arms 2-5.; Other Names: BDM; Drug: Delpazolid; Delpazolid is not licensed yet. Current experience in humans upto Phase IIA. Dose according to randomization to dosing arms 2-5.; Other Names: LCB01-0371
Experimental: Arm5(D800-BD); Participants receive the following medication for the duration of 16weeks together with food.; Delpazolid : Will be dosed 800 mg orally twice daily; Bedaquiline: will be dosed as per the licensed dose: 400 mg orally once daily for the first 14 days, then 200 mg three times a week.; Delamanid: will be dosed as per the licensed dose: 200 mg orally twice daily doses of 100 mg.; Moxifloxacin: will be dosed as per the licensed dose: 400 mg orally once daily	Drug: Bedaquiline, Delamanid, Moxifloxacin; These three licensed drugs form the backbone of a new regimen to which delpazolid is added in arms 2-5.; Other Names: BDM; Drug: Delpazolid; Delpazolid is not licensed yet. Current experience in humans upto Phase IIA. Dose according to randomization to dosing arms 2-5.; Other Names: LCB01-0371

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Safety Outcome : Proportion of Patients Experiencing Adverse Event	Participants with ≥ 1 TEAE, by severity, related Adverse events: possibly, probably, or definitely related to study drugs	week0 - week52
Efficacy Outcome: Exposure-response Analysis With TTP (Time to Positive)_AUC0-24	The efficacy of DZD was evaluated by measuring the change in mycobacterial load over time on treatment as quantified by TTP (Time to positive) in BD MGIT960® liquid culture described by non linear mixed effects methodology. A population PK model was developed using NONMEM version 7.4.1. DZD PK is well-described by a two-compartment model with first-order absorption, first-order elimination and a proportional residual error. The final model included allometric scaling based on FFM.	Week 0 - Week 16
Efficacy Outcome: Exposure-response Analysis With TTP (Time to Positive)_Cmax	The efficacy of DZD was evaluated by measuring the change in mycobacterial load over time on treatment as quantified by TTP (Time to positive) in BD MGIT960® liquid culture described by non linear mixed effects methodology. A population PK model was developed using NONMEM version 7.4.1. DZD PK is well-described by a two-compartment model with first-order absorption, first-order elimination and a proportional residual error. The final model included allometric scaling based on FFM.	Week 0 - Week 16
Efficacy Outcome: Exposure-response Analysis With TTP (Time to Positive)_Cmin	The efficacy of DZD was evaluated by measuring the change in mycobacterial load over time on treatment as quantified by TTP (Time to positive) in BD MGIT960® liquid culture described by non linear mixed effects methodology. A population PK model was developed using NONMEM version 7.4.1. DZD PK is well-described by a two-compartment model with first-order absorption, first-order elimination and a proportional residual error. The final model included allometric scaling based on FFM.	Week 0 - Week 16

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Efficacy Outcome: BD MGIT960® Liquid Media Culture Results	Summary of Changes in Mycobacterial Load Over Time on Treatment as Quantified by Time to Positivity in BD MGIT960® Liquid Media - Intent to Treat Population Sputum samples were collected for BD MGIT960® Liquid Media culture at all time points during the treatment and follow-up phases, and this table shows culture results, which are reported as: Positive, Negative, Contaminated, Missing. Note: Contaminated cultures are shown as contaminated for the purpose of the overall result but are counted as missing for calculating summary statistics. The data recorded as 'Positive for MTB Complex with Contamination' are included as 'Positive' for MGIT result. However, the data from mean and median calculations for TTP (Time to positive) due to contamination.	Week 0 - Week 16
Efficacy Outcome: Changes in Mycobacterial Load Over Time on Treatment as Quantified by Time to Positivity in BD MGIT960® Liquid Media	The efficacy of DZD was evaluated by measuring the change in mycobacterial load over time on treatment as quantified by time to positivity (TTP) in BD MGIT 960® liquid culture described by nonlinear mixed-effects methodology. Sputum samples were collected for BD MGIT960® Liquid Media culture at all time points during the treatment and follow-up phases, and this table shows TTP results.	Week 0 - Week 16
Efficacy Outcome: Loewenstein-Jensen Solid Media Culture Results	Summary of Changes in Mycobacterial Load Over Time on Treatment as Quantified by Time to Culture Conversion in Loewenstein-Jensen Solid Media - Intent-to-Treat Population Sputum samples were collected for Loewenstein-Jensen Solid Media culture at at Week 0, Week 8, Week 12, Week 6 during the treatment and follow-up phases, and this table shows culture results, which are reported as: Positive, Negative, Contaminated, Missing.	Week 0 - Week 16
Efficacy Outcome: The Proportion Converted by Day Corresponding to End of Each Week	Culture conversion was defined as 2 negative cultures without an intervening positive culture. Time was measured as time on treatment until the first negative culture (up to Week 16 Visit). 'Converted by Week x' shows proportion converted by day corresponding to end of each week, e.g., Week 2 = Day 14.	Week 0 - Week 16
Efficacy Outcome: Time to Culture Conversion	Time to culture conversion was defined as 2 negative cultures without an intervening positive culture. Time was measured as time on treatment until the first negative culture (up to Week 16 Visit).	Week 0 - Week 16
Efficacy Outcome : Relapse or Reinfection	A participant was positive for relapse or reinfection if they converted to culture negative by Week 8 and had 2 consecutive positive cultures after Week 16 of randomization, without an intervening negative.	Week0 - Week52

Other Outcome Measures

Outcome Measure	Measure Description	Time Frame
Mycobacteriology Identification and Characterization Endpoints	Minimum inhibitory concentrations (MIC) of BDQ, DLM, MXF, DZD, from a baseline isolate, and a representative isolate obtained at or after week8, if any Frequency of acquired mutations in the infecting strain over treatment assessed by whole genome sequencingComparison between bacterial strain causing recurrent disease, and the strain at baselineby whole genome sequencing, to discriminate relapse from re-infection	Week8, Day 91
Pharmacokinetic Endpoints : AUC 0-24	Area under the plasma concentration curve from morning dosing to 24 hours (AUC 0-24) on day 14 (Week2)	Day 14
Pharmacokinetic Endpoints : The observed maximum concentration(Cmax)	Pharmacokinetic parameters will be assessed using non-compartmental techniques and non-linear mixed effects methodology.	Day 14
Pharmacokinetic Endpoints : Cmin	The minimum observed plasma concentration (Cmin) at day 14 (24 hours following the last dose for intake once daily (QD) and 12 hours following the last dose for twice daily intake (BID))	Day 14
Pharmacokinetic Endpoints : Apparent oral clearance (Cl/F)	Pharmacokinetic parameters will be assessed using non-compartmental techniques and non-linear mixed effects methodology.	Day 14
Pharmacokinetic Endpoints : Apparent volume of distribution (Vd/F)	Pharmacokinetic parameters will be assessed using non-compartmental techniques and non-linear mixed effects methodology.	Day 14
Pharmacokinetic Endpoints :Terminal half-life (t1/2)	Pharmacokinetic parameters will be assessed using non-compartmental techniques and non-linear mixed effects methodology.	Day 14
Exploratory endpoint : rate of change in MBLA	Rate of change in molecular bacterial load assay (MBLA) during treatment	week0 - week52
Exploratory endpoint : Time to stable culture conversion to negative in MBLA	Time to stable culture conversion to negative in MBLA (defined as two negative MBLAs without an intervening positive)	week0 - week16
Exploratory endpoint : Rate of change in bacterial load	Rate of change in bacterial load measured by quantification of sputum lipoarabinomannan (LAM) during treatment	week0 - week16

Collaborators and Investigators

• Sponsor: LigaChem Biosciences, Inc.
• Collaborators: Radboud University Medical Center; University of California, San Francisco; Ludwig-Maximilians - University of Munich

Publications and helpful links

General Publications

• Minja LT, van der Feltz I, Manyama C, Mpagama S, Mhimbira F, Norena I, Sebe M, Rassool M, Wallis RS, Ntinginya N, Liyoyo A, Mbeya B, Wagnerberger L, Zumba T, Peter DD, Makkan H, Sloan DJ, Brake LT, Schildkraut JA, Aarnoutse R, McHugh TD, Wildner L, Boeree MJ, Geiter L, Cho YL, Aldana BH, Phillips PPJ, Hoelscher M, Svensson EM, Heinrich N; PanACEA consortium. Delpazolid in combination with bedaquiline, delamanid, and moxifloxacin for pulmonary tuberculosis (PanACEA-DECODE-01): a prospective, randomised, open-label, phase 2b, dose-finding trial. Lancet Infect Dis. 2025 Jul 8:S1473-3099(25)00289-0. doi: 10.1016/S1473-3099(25)00289-0. Online ahead of print.
• Dierig A, Hoelscher M, Schultz S, Hoffmann L, Jarchow-MacDonald A, Svensson EM, Te Brake L, Aarnoutse R, Boeree M, McHugh TD, Wildner LM, Gong X, Phillips P, Minja LT, Ntinginya N, Mpagama S, Liyoyo A, Wallis RS, Sebe M, Mhimbira FA, Mbeya B, Rassool M, Geiter L, Cho YL, Heinrich N. A phase IIb, open-label, randomized controlled dose ranging multi-centre trial to evaluate the safety, tolerability, pharmacokinetics and exposure-response relationship of different doses of delpazolid in combination with bedaquiline delamanid moxifloxacin in adult subjects with newly diagnosed, uncomplicated, smear-positive, drug-sensitive pulmonary tuberculosis. Trials. 2023 Jun 6;24(1):382. doi: 10.1186/s13063-023-07354-5.

Study record dates

Study Major Dates

• Study Start (Actual): October 28, 2021
• Primary Completion (Actual): January 4, 2023
• Study Completion (Actual): September 11, 2023

Study Registration Dates

• First Submitted: September 1, 2020
• First Submitted That Met QC Criteria: September 10, 2020
• First Posted (Actual): September 16, 2020

Study Record Updates

• Last Update Posted (Estimated): September 16, 2025
• Last Update Submitted That Met QC Criteria: August 28, 2025
• Last Verified: August 1, 2025

More Information

Terms related to this study

• Keywords: drug-sensitive TB
• Additional Relevant MeSH Terms: Respiratory Tract Infections; Respiratory Tract Diseases; Lung Diseases; Gram-Positive Bacterial Infections; Bacterial Infections; Bacterial Infections and Mycoses; Actinomycetales Infections; Mycobacterium Infections; Tuberculosis; Infections; Tuberculosis, Pulmonary; Heterocyclic Compounds; Heterocyclic Compounds, 2-Ring; Heterocyclic Compounds, Fused-Ring; Fluoroquinolones; 4-Quinolones; Quinolones; Quinolines; Moxifloxacin; bedaquiline; OPC-67683; delpazolid
• Other Study ID Numbers: LCB01-0371-20-2-02; PanACEA-DECODE-01 (Other Identifier: PanACEA)

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: YES
• IPD Plan Description: Deidentified individual patient data, that underlie the results in published article(s) based on data from the trial which including text, tables, figures will be presented to various stakeholders. This reported will be presented to various stakeholder during various forums or meetings. First esults will be disclosed to participants, staff and our site Community Advisory Board. Thereafter we would invite several stakeholders from the community or visit their establishments to review study results. Simultaneously, the studying findings report will be sent to the various regulatory authorities, including the National Department of Health (NDoH). With NDoH and its divisions we will establish needs for further engagement and suggestions for policy or programmatic changes.
• IPD Sharing Time Frame: PD will be provided 1 - 2 years after and up to 5 years after the publication of the article on the results of the trial
• IPD Sharing Access Criteria: IPD access will be provided for analyses of related to the aims of research described in the protocol and for individual patient data meta-analyses to researchers who provide a methodologically sound proposal to yhlee@ligachembio.com
• IPD Sharing Supporting Information Type: STUDY_PROTOCOL; SAP; ICF

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: Yes
• Studies a U.S. FDA-regulated device product: No