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Phase 2 Trial to Evaluate the Safety and Tolerability and Early Bactericidal Activity of RESP30TB in Tuberculosis

A Phase 2 Trial to Evaluate the Safety and Tolerability and Early Bactericidal Activity of Nebulised RESP30TB in Adults With Newly Diagnosed, Rifampicin Susceptible Pulmonary Tuberculosis

Status
Recruiting
Phases
Phase 2
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT07073638
Enrollment
24
Registered
2025-07-18
Start date
2025-10-13
Completion date
2026-11-15
Last updated
2026-01-12

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Pulmonary Tuberculoses

Brief summary

A Phase 2 Trial to Evaluate the Safety and Tolerability and Early Bactericidal Activity of Nebulised RESP30TB in Adults with Newly Diagnosed, Rifampicin Susceptible Pulmonary Tuberculosis

Detailed description

This is a single-centre, open-label, single arm, clinical trial in two sequential stages, with no stratification. 12 patients will be enrolled in Stage 1, and a further 12 patients will be enrolled in Stage 2 (total of 24 patients in the trial).

Interventions

DRUGRESP30TB

Nitric Oxide agent

isoniazid 75 mg (H), rifampicin 150 mg (R), pyrazinamide 400 mg (Z), ethambutol 275 mg (E)

Sponsors

Thirty Respiratory Limited
Lead SponsorINDUSTRY

Study design

Allocation
NON_RANDOMIZED
Intervention model
SEQUENTIAL
Primary purpose
TREATMENT
Masking
NONE

Eligibility

Sex/Gender
ALL
Age
18 Years to 65 Years
Healthy volunteers
No

Inclusion criteria

1. Provide written, informed consent prior to all trial-related procedures and agree to undergo all trial procedures. 2. Body weight (in light clothing and with no shoes) between 40 and 90 kg, inclusive. 3. Newly diagnosed pulmonary TB. 4. Rifampicin susceptible pulmonary TB as determined by molecular testing. 5. Ability to produce an adequate volume of sputum as estimated from a pre-treatment overnight sputum collection sample (estimated 10 mL or more). 6. Spirometry performed during screening with a Forced Expiration Volume in the first second (FEV1) of ≥ 40%. 7. Be of non-childbearing potential or willing to use effective methods of contraception, as defined in section 4.3.4.

Exclusion criteria

1. HIV positive AND CD4 \< 350 cells/mm3 OR are receiving antiviral therapy (ART) 2. Baseline Methaemoglobin saturation (SpMet) \>3%. 3. Female patients who is pregnant or breast-feeding. 4. Patients planning to conceive a child within the anticipated period of trial participation and for at least 90 days after the last dose of IMP in the trial. 5. Participation in other clinical studies with investigational agents within 8 weeks prior to screening. 6. Treatment received for this episode of TB with any drug active against M.tb 7. Treatment with immunosuppressive medications such as TNF-alpha inhibitors within 2 weeks prior to screening, or systemic corticosteroids for more than 7 days within 2 weeks prior to screening. 8. Treatment with NO and other NO donor agents, phosphodiesterase inhibitors and lung surfactant drugs, within 30 days prior to screening.

Design outcomes

Primary

MeasureTime frameDescription
Safety and Tolerability of Inhaled RESP30TB Measured as Number of Treatment Emergent Adverse Events (TEAEs)Dosing period 14 days + Follow-up period 14 daysIncidence of Treatment Emergent Adverse Events (TEAEs) will be presented by severity, drug relatedness, seriousness, leading to early withdrawal and leading to death

Countries

South Africa

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026