PMD-026 (RSK1 Inhibitor)

PMD-026 is an oral drug which will be taken every 12 hours on an outpatient basis at the assigned dose every day of each 28-day cycle. Provided by Phoenix Molecular Designs.

This is a phase Ib study evaluating PMD-026, an oral inhibitor of ribosomal protein S6 kinase A1 (RSK1), in participants with myelofibrosis (MF).The dose escalation portion utilizes a standard 3+3 design to evaluate two dose levels with an additional dose de-escalation portion to identify the recommended phase II dose (RP2D); subsequently, an additional 6 patients will be enrolled in the dose expansion portion evaluating the efficacy of PMD-026.

Live record on ClinicalTrials.gov →

• Histologically confirmed diagnosis of primary myelofibrosis, post-polycythemia vera myelofibrosis or post-essential thrombocythemia myelofibrosis in chronic phase, according to the 2016 WHO criteria
• Patients must have had at least 1 prior JAK inhibitor treatment for a minimum of 12 weeks and their disease was determined resistant or refractory, and/or their response was lost or intolerant to treatment.
• Intermediate-2 or High-risk MF, as defined by the Dynamic International Prognostic Scoring System (DIPSS).
• Splenomegaly defined as estimated spleen volume of ≥450 cm3 by imaging with either MRI, CT or ultrasound, or a palpable spleen >=5 cm from the costal margin.
• Baseline MFSAF v4.0 Total Symptom Score ≥ 10

Inclusion criteria as written on the registry, trimmed. The full list, with exclusions, is on the live record.