Overview

This is a phase 1b randomized, double-blind, placebo-controlled, multiple ascending doses (MAD) study of PMG1015 in idiopathic pulmonary fibrosis (IPF) subjects. This study aims to evaluate the safety, tolerability, pharmacokinetics and immunogenicity of PMG1015 after MAD.

Eligibility

Key Inclusion Criteria:

1. Diagnosis of IPF as defined by current American Thoracic Society (ATS)/European Respiratory Society (ERS)/Japanese Respiratory Society (JRS)/Latin American Thoracic Association (ALAT) Clinical Practice Guidelines for IPF (2022) (Pathological examination refers to transbronchial lung cryobiopsy or surgical/pleuroscopic lung biopsy);
2. Forced vital capacity percent predicted (FVCpp) ≥45% at screening;
3. Diffusing capacity of the lung for carbon monoxide (DLCO; corrected for haemoglobin) from 30% to 90% of the predicted, inclusive at screening;
4. Subjects not receiving any approved IPF treatment (pirfenidone or nintedanib) within 1 month before enrollment for any reasons

Key Exclusion Criteria:

1. Patients with instable condition of IPF as assessed by the investigator at screening, and those with acute exacerbation of IPF during screening or within 3 months prior to randomization;
2. Patients who are likely to be lung transplant recipients within 6 months or expected to survive less than 1 year as assessed by the investigator at screening;
3. Patients accompanying with an interstitial lung disease other than IPF;
4. Patients accompanying with other types of respiratory disorders, which may affect the study results as assessed by the investigator;
5. Patients who received vasodilator therapy for pulmonary arterial hypertension (e.g. Bosentan) within 1 month prior to screening;
6. Patients accompanying with other uncontrolled underlying diseases, for which the patient is not considered suitable for the study as assessed by the investigator;
7. Patients who had active tuberculosis within 12 months prior to screening, or clinical symptoms of bacterial, viral, fungal or microbial infections requiring intervention within 4 weeks prior to randomization;
8. Patients who have known allergic reaction to the investigational product or its active pharmaceutical ingredients (APIs), or history of allergic reaction to human, humanized, chimeric, or murine monoclonal antibodies or any substances contained in the excipients;
9. Pregnant or lactating women; female subjects who plan to become pregnant during the study, or patients who are not willing to take contraceptive measures as required by the protocol during the study;
10. Other conditions that preclude the patient from participating in the study as assessed by the investigator.