Endpoints
Primary
Part A: Safety and Tolerability of ORJ-001: Number of Participants with Treatment-Related Adverse Events (TEAEs)
Timeframe: From first dose through Safety Follow-up Visit, up to 12 weeks.
Part A: Safety and Tolerability of ORJ-001: Severity of Treatment-Emergent Adverse Events (TEAEs)
Timeframe: From first dose through Safety Follow-up Visit, up to 12 weeks.
Part A: Safety and Tolerability of ORJ-001: Change from Baseline in Systolic Blood Pressure
Timeframe: Baseline and each study visit through Safety Follow-up Visit, up to 12 weeks.
Part A: Safety and Tolerability of ORJ-001: Change from Baseline in Body Temperature
Timeframe: Baseline and each study visit through Safety Follow-up Visit, up to 12 weeks.
Part A: Safety and Tolerability of ORJ-001: Change from Baseline in Heart Rate
Timeframe: Baseline and each study visit through Safety Follow-up Visit, up to 12 weeks.
Part A: Safety and Tolerability of ORJ-001: Change from Baseline in Respiratory Rate
Timeframe: Baseline and each study visit through Safety Follow-up Visit, up to 12 weeks.
Part A: Safety and Tolerability of ORJ-001: Change from Baseline in Oxygen Saturation
Timeframe: Baseline and each study visit through Safety Follow-up Visit, up to 12 weeks.
Part A: Safety and Tolerability of ORJ-001: Change from Baseline in Corrected QT Interval
Timeframe: Baseline, Week 4, Week 12, and Safety Follow-up Visit up to 12 weeks.
Part B: Change from Baseline in Forced Vital Capacity (FVC)
Timeframe: Baseline to Week 12
Secondary (2)
Part B: Change From Baseline in Percent Predicted Forced Vital Capacity (FVC%)
Part B: Time to Acute Exacerbation of IPF, Hospitalization for a Respiratory Cause, or Death
Arms and interventions
Part A: ORJ-001 400 mg Experimental
Participants receive ORJ-001 400 mg administered subcutaneously (SC) twice weekly (BIW) for 12 weeks. Randomization ratio: 3:1:1 (400 mg:200 mg:placebo).
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Part A: ORJ-001 200 mg Experimental
Participants receive ORJ-001 200 mg administered subcutaneously (SC) twice weekly (BIW) for 12 weeks. Randomization ratio: 3:1:1 (active:active:placebo).
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Part A: Placebo Placebo comparator
Participants receive matching placebo administered subcutaneously (SC) twice weekly (BIW) for 12 weeks.
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Part B: ORJ-001 (Selected Dose) Experimental
Participants receive the ORJ-001 dose selected based on Part A safety, tolerability, pharmacokinetic, pharmacodynamic, and efficacy data, administered subcutaneously (SC) twice weekly (BIW) for 12 weeks. Participants are randomized 1:1 to ORJ-001 or placebo.
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Part B: Placebo Placebo comparator
Participants receive matching placebo administered subcutaneously (SC) twice weekly (BIW) for 12 weeks.
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Drugs: ORJ-001
Other: Placebo