Study to Evaluate the Efficacy of Delpazolid as Add-on Therapy in Refractory Mycobacterium Abscessus Complex

NCT ID: NCT06004037

Last Updated: 2025-08-22

Basic Information

• Recruitment Status: ACTIVE_NOT_RECRUITING
• Clinical Phase: PHASE2
• Total Enrollment: 20 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2024-01-16
• Study Completion Date: 2026-12-30

Brief Summary

The purpose of this study is to evaluate the efficacy and safety of delpazolid add-on therapy in Patients with Refractory Mycobacterium abscessus Complex Pulmonary disease

Detailed Description

Delpazolid, which demonstrates effects similar to other oxazolidinone-class drugs and has confirmed good safety, aims to evaluate its efficacy in MABC-PD patients who are unresponsive to guideline-based treatments

Conditions

Nontuberculous Mycobacterium Infection; Mycobacterium Abscessus Infection

Study Design

• Allocation Method: NA
• Intervention Model: SINGLE_GROUP
• Primary Study Purpose: TREATMENT
• Blinding Strategy: NONE

Study Groups

delpazolid

In addition to background therapy for MABC, patients will be given orally three tablets (400 mg/tablet) of LCB01-0371 for 12 weeks.

Group Type: EXPERIMENTAL

Delpazolid

Intervention Type: DRUG

Three tablets (400 mg/tablet) of delpazolid will be orally administered once daily for 12 weeks.

After 3 months (12 weeks) of administration, if the investigator determines that there are clinical benefits, an additional extended treatment of up to 9 months (40 weeks) may be given, amounting to 1 year of treatment in total.

Interventions

Delpazolid

Three tablets (400 mg/tablet) of delpazolid will be orally administered once daily for 12 weeks.

After 3 months (12 weeks) of administration, if the investigator determines that there are clinical benefits, an additional extended treatment of up to 9 months (40 weeks) may be given, amounting to 1 year of treatment in total.

Intervention Type: DRUG

Other Intervention Names

LCB01-0371

Eligibility Criteria

Inclusion Criteria

• Pre-screening: Adults aged 19 years or above
• Pre-screening: Patients diagnosed with MABC (including subspecies abscessus, bolletii, and massiliense) pulmonary disease in radiologic and microbiologic evaluations
• LCB01-0371 MIC ≤ 8 μg/mL for MABC
• Patients who continue to show positivity for MABC even after treatments based on the guidelines of ATS/ERS/ESCMID/IDSA for at least 6 months prior to screening, and who meet all of the following criteria:

1. Patients who have been confirmed positive at least once in the last sputum or bronchoscopy sample culture performed prior to screening

2. Patients who have not achieved culture conversion (at least 3 consecutive negative mycobacteria cultures in the sputum or bronchoscopy sample collected at an interval of at least 4 weeks) within 6 months prior to screening

• Patients who can voluntarily expectorate sputum at screening
• Patients with a life expectancy of 12 weeks or more
• Patients with adequate organ function who meet the following criteria:

1. Hemoglobin > 9.0 g/dL (without transfusion within 2 weeks prior to measurement)

2. Absolute neutrophil count ≥ 1,500/µL (without administration of G-CSF within 2 weeks prior to measurement)

3. Platelet ≥ 100,000/µL

4. Total bilirubin ≤ 1.5 × upper limit of normal (ULN)

5. Alanine aminotransferase/aspartate aminotransferase (ALT/AST) ≤ 2.5 × ULN

6. Serum creatinine ≤ 1.5 × ULN or creatinine clearance >30 mL/min (calculated with the Cockcroft-Gault formula)

• Patients who voluntarily provided a written consent to participate in the clinical study

Exclusion Criteria

• Patients who cannot swallow the study drug tablet due to dysphagia, nasogastric tube insertion, etc.
• Patients diagnosed with cystic fibrosis
• Patients who have received a lung transplant
• Patients with disseminated or extrapulmonary nontuberculous mycobacteria
• Patients with known active pulmonary tuberculosis
• Patients with NTM infections other than MABC
• Patients with an active pulmonary malignancy within 1 year prior to screening or Patients with other malignancies that require chemotherapy or radiotherapy
• Patients who has received linezolid for MABC treatment within 3 months prior to screening
• Patients with known HIV positivity or a suspected infection thereof or Patients with a known active hepatitis B or C infection
• Patients who currently have a clinically significant cardiovascular disease

1. Patients with severe cardiac failure (New York Heart Association [NYHA] class III/IV) that occurred within 24 weeks prior to screening

2. Patients with pulmonary embolism or deep venous thrombosis that occurred within 24 weeks prior to screening

• Patients whose multidrug therapy for treatment of MABC was changed within 4 weeks prior to screening (Discontinuation, dose adjustment, change of administration route, etc., are allowed.)
• Patients for whom the administration of contraindicated concomitant drugs that correspond to the following cannot be discontinued during the clinical study or for whom their administration is necessary

1. Administration of a new antibacterial agent for the prioritized treatment of NTM, especially MABC, other than background therapy

2. Monoamine oxidase inhibitors

3. Serotonin reuptake inhibitor or serotonin 5-HT1 receptor agonists

4. Meperidine or buspirone

5. Drugs that lower epilepsy threshold; tramadol, etc.

6. Tricyclic Antidepressant

• Pregnant or breastfeeding women and women of childbearing potential who do not agree to practice appropriate contraceptive methods*:

• Minimum Eligible Age: 19 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: No

Sponsors

LigaChem Biosciences, Inc.

INDUSTRY

Sponsor Role: lead

Responsible Party

Responsibility Role: SPONSOR

Locations

Asan Medical Center

Seoul, , South Korea

Bundang Seoul National University Hospital

Seoul, , South Korea

Samsung Medical Center

Seoul, , South Korea

Seoul National University Bundang Hospital

Seoul, , South Korea

Severance Hospital

Seoul, , South Korea

Countries

South Korea

Other Identifiers

LCB01-0371-2004

Identifier Type: -

Identifier Source: org_study_id