About this trial
This is a phase 3 double-blind clinical trial arm to test Ropeginterferon alfa-2b (P1101) in adult patients with Primary Myelofibrosis (PMF) at early stage or low to medium risk.
Participants will receive the study drug/placebo bi-weekly and have an assessment visit every 4 weeks. The ratio of study drug to placebo group is 2:1.
Eligibility criteria
Qualifiers
Male or female patients aged ≥18 years at the time of signing the informed consent form;
Patients with pre-fibrotic/early PMF (Pre-PMF) or overt primary myelofibrosis at low to intermediate-1 risk according to DIPSS plus, diagnosed according to WHO 2016 or 2022 classification;
With good liver function at screening, which is defined as total bilirubin ≤1.5 × upper limit of normal (ULN), international normalized ratio (INR) ≤1.5 × ULN, albumin >3.5 g/dL, alanine aminotransferase (ALT) ≤2.0 × ULN, and aspartate aminotransferase (AST) ≤2.0 × ULN;
Hgb ≥10.0 g/dL at screening;
Disqualifiers
Any known contraindications to interferon α or hypersensitivity to interferon α;
Patients with prior interferon therapy having poor tolerability or lack of efficacy to the previous interferon therapy per investigator's judgement;
Patients with an ongoing cytoreduction (e.g., HU or IFN-α) at the time of screening if, in the Investigator's opinion, randomizing them into the placebo arm will lead to immediate rebound increase of peripheral blood counts and thus may jeopardize their health status;
With severe or serious diseases that, in the Investigator's opinion, may affect the patient's participation in this study;
Trial design
Treatments tested in this trial
- Ropeginterferon alfa-2b
- Placebo