PanACEA DElpazolid Dose-finding and COmbination DEvelopment (DECODE)

Pulmonary Tuberculosis Clinical Trial

— DECODE  

Official title:

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

Clinical Trial Details — Status: Completed

Administrative data

• NCT number: NCT04550832
• Other study ID #: LCB01-0371-20-2-02
• Secondary ID: PanACEA-DECODE-0
• Status: Completed
• Phase: Phase 2
• Start date: October 22, 2021
• Est. completion date: September 11, 2023

Study information

• Verified date: February 2024
• Source: LigaChem Biosciences, Inc.
• Contact: n/a
• Is FDA regulated: No
• Study type: Interventional

Clinical Trial Summary

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

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.

Recruitment information / eligibility

• Status: Completed
• Enrollment: 76
• Est. completion date: September 11, 2023
• Est. primary completion date: January 4, 2023
• Accepts healthy volunteers: No
• Gender: All
• Age group: 18 Years to 65 Years

Eligibility

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

Related Conditions & MeSH terms

• Communicable Diseases
• Infections
• Infections and Infestations
• Pulmonary Tuberculosis
• Tuberculosis
• Tuberculosis, Pulmonary

Intervention

Drug:
• Delpazolid
Delpazolid is not licensed yet. Current experience in humans upto Phase IIA. Dose according to randomization to dosing arms 2-5.
• Bedaquiline, Delamanid, Moxifloxacin
These three licensed drugs form the backbone of a new regimen to which delpazolid is added in arms 2-5.

Locations

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

Sponsors (4)

Lead Sponsor	Collaborator
LigaChem Biosciences, Inc.	Ludwig-Maximilians - University of Munich, Radboud University Medical Center, University of California, San Francisco

Countries where clinical trial is conducted

South Africa,  Tanzania, 

Outcome

Type	Measure	Description	Time frame	Safety issue
Other	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
Other	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
Other	Pharmacokinetic Endpoints : The observed maximum concentration(Cmax)	Pharmacokinetic parameters will be assessed using non-compartmental techniques and non-linear mixed effects methodology.	Day 14
Other	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
Other	Pharmacokinetic Endpoints : Apparent oral clearance (Cl/F)	Pharmacokinetic parameters will be assessed using non-compartmental techniques and non-linear mixed effects methodology.	Day 14
Other	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
Other	Pharmacokinetic Endpoints :Terminal half-life (t1/2)	Pharmacokinetic parameters will be assessed using non-compartmental techniques and non-linear mixed effects methodology.	Day 14
Other	Exploratory endpoint : rate of change in MBLA	Rate of change in molecular bacterial load assay (MBLA) during treatment	week0 - week52
Other	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
Other	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
Primary	Efficacy Endpoint : The change in sputum mycobacterial load	The change in sputum mycobacterial load given over 16weeks on treatment as qualified by a change in time to positive in BD MGIT 960® liquid culture described by non-linear mixed-effects methodology.	week0 - week16
Primary	primary Safety Endpoint : Proportion of patients experiencing adverse event as defined below	Proportion of patients experiencing expected oxazolidinone class toxicities, defined as peripheral or optical neuropathy, or incident leukopenia, anemia or thrombocytopenia, or adverse events in line with tyramine pressor response, all of Grade 2 or higher, possibly, probably or definitely related to DZD	week0 - week52
Secondary	Secondary safety endpoints : adverse event and as below	All adverse events; Adverse events of Grade 3 severity or higher; Adverse events possibly, probably or definitely related to study drugs; Treatment discontinuations or interruptions related to adverse events/serious adverse events; Frequency, severity and type of ECG alterations; Changes in ECG intervals of PR, RR, QRS, QT, Fridericia-corrected QT [QTcF]; Proportion of participants with QTcF > 500ms in ECGs on treatment; Proportion of participants with a prolongation of QTcF > 60ms in ECGs relative to baseline measurement	week0 - week52
Secondary	Secondary Efficacy Endpoints : Proportion of patients who suffer relapse and as below	Proportion of patients who suffer relapse, defined as recurrent disease caused by a strain identical to the baseline isolate, within 12 months post randomisation	week0 - week52
Secondary	Secondary Efficacy Endpoints : out of patients completing 16 weeks of therapy and achieving stable culture conversion to negative (SCC)	out of patients completing 16 weeks of therapy and achieving stable culture conversion to negative (SCC) as defined below by week 08, with no positives to follow by the week 16 visit.; Time to recurrent TB, and to relapse, within 12 months post randomisation; Time to stable sputum culture conversion (SCC) to negative on liquid media (defined as two negative cultures without an intervening positive culture). Time will be measured as time on treatment until the first negative culture.; Proportion of participants who achieved SCC at each time point during treatment; Proportion of participants with negative sputum culture on solid media at WK 08 and other timepoints; Proportion of participants developing drug resistance among those not converting to negative culture	week8, week16