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Pacritinib (VONJO™) is a new oral kinase inhibitor approved for myelofibrosis patients with low platelets. The drug demonstrated significant spleen volume reduction in a Phase III trial.

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Area of Science:

  • Pharmacology
  • Oncology
  • Hematology

Background:

  • Myelofibrosis is a serious bone marrow cancer.
  • Existing treatments have limitations for certain patient groups.
  • Pacritinib targets key signaling pathways implicated in myelofibrosis.

Purpose of the Study:

  • To summarize the development of pacritinib.
  • To highlight its first FDA approval for myelofibrosis.
  • To review the clinical trial data supporting its efficacy.

Main Methods:

  • Review of pacritinib's development milestones.
  • Analysis of data from the Phase III PERSIST-2 trial.
  • Focus on accelerated approval criteria and outcomes.

Main Results:

  • Pacritinib (VONJO™) received accelerated FDA approval in February 2022.
  • The approval is for adults with intermediate- or high-risk myelofibrosis and a platelet count < 50 × 10^9/L.
  • The PERSIST-2 trial showed spleen volume reduction in pacritinib recipients.

Conclusions:

  • Pacritinib represents a significant advancement in myelofibrosis treatment.
  • The drug addresses an unmet need for patients with thrombocytopenia.
  • Successful development and approval mark a milestone in targeted cancer therapy.