Pulmonary Tuberculosis Clinical Trial
Official title:
A Phase 2, Partially-blinded, Randomised Trial Assessing the Safety and Efficacy of TBAJ-876 or Bedaquiline, in Combination With Pretomanid and Linezolid in Adult Participants With Newly Diagnosed, Drug-sensitive, Smear-positive Pulmonary Tuberculosis
The goal of this clinical trial is to evaluate 3 dose levels of TBAJ876 for 8 weeks in combination with pretomanid and linezolid, compared to 8 weeks of Isoniazid, rifampicin, pyrazinamide and ethambutol (2HRZE), in adult participants with newly diagnosed, smear-positive, pulmonary drug sensitive tuberculosis (DS-TB). The main questions the trial aims to answer are: - What is the optimal dose of TBAJ876 to continue further in development. - What is the bactericidal activity of bedaquiline with pretomanid and linezolid (B-Pa-L) compared to 2HRZE and TBAJ876-Pa-L over 8 weeks - What is the efficacy and safety of the 26-week B-Pa-L regimen compared with the SOC (2HRZE/4HR) in participants with DS-TB. Participants will be seen regularly during treatment (up to 26 weeks) and follow-up (52 weeks post treatment) for safety and efficacy assessments, including but not limited to: - Safety labs, ECGs, vital signs, physical exams, PK sampling, neuropathy assessments and adverse event monitoring - Sputum collection
Participants will be treated up to 26 weeks with either: - TBAJ876 25 mg + pretomanid 200 mg + linezolid 600 mg for 8 weeks followed by HR for 7 to 18 weeks - TBAJ876 50 mg + pretomanid 200 mg + linezolid 600 mg for 8 weeks followed by HR for 7 to 18 weeks - TBAJ876 100 mg + pretomanid 200 mg + linezolid 600 mg for 8 weeks followed by HR for 7 to 18 weeks - Bedaquiline 200 mg + pretomanid 200 mg + linezolid 600 mg for 8 weeks followed by bedaquiline 100 mg + pretomanid 200 mg + linezolid 600 mg for 18 weeks - Isoniazid (H) + rifampicin (R) + pyrazinamide (Z), ethambutol (E) for 8 weeks followed by HR for 18 weeks (dose based on participant's weight). TBAJ876 and bedaquiline will be blinded during the first 8 weeks of trial treatment; participants randomised to the TBAJ876 or bedaquiline arms will receive open-label pretomanid and linezolid. Participants randomised to the 2HRZE/4HR arm will receive open-label HRZE. After receiving 8 weeks of treatment, participants randomised to the TBAJ876-Pa-L treatment arms will receive open-label HR for at least 7 weeks. Treatment completion will be allowed at Week 15 in participants randomised to the TBAJ876-Pa-L arms, if the below criteria are met: - Week 8 or EOT Make-up Period 1 sputum MGIT culture is negative, and - The participant has no TB-related symptoms by Week 15. Participants with symptoms that have a more likely alternative explanation are eligible to complete treatment at Week 15. If the MGIT result is MTB positive and/or there are still TB symptom(s), participants will continue to receive HR (in the 3 TBAJ876 arms) and will complete 18 weeks of treatment with HR, for a total of 26 weeks of treatment. After receiving 8 weeks of trial treatment, all participants randomised to the HRZE arm will receive open-label HR for 18 weeks, for a total of 26 weeks of treatment. After receiving 8 weeks of treatment, a participants randomised to the B-Pa-L arm will receive open-label bedaquiline 100 mg (a reduction from the 200 mg daily dose in the first 8 weeks), pretomanid 200 mg, and linezolid 600 mg daily for 18 weeks, for a total of 26 weeks of trial treatment. ;
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