Pacritinib
Last Updated: 04/28/2026
Phase I/II Trial of Pacritinib, a Kinase Inhibitor of CSF1R, IRAK1, JAK2, and FLT3, in Adults and Pediatric Participants 12 Years of Age or Older With Myelodysplastic Syndromes or Myelodysplastic/Myeloproliferative Neoplasms
Background: Myelodysplastic syndrome (MDS) and myelodysplastic/myeloproliferative neoplasm (MDS/MPN) are blood disorders that can cause serious complications in children and adults. MDS and MDS/MPN can also progress to acute myeloid leukemia. Treatments for these disorders are risky and not always effective. Better treatments are needed.
A Pilot Study of Pacritinib Combined With a BTK Inhibitor in Patients With Relapsed/Refractory Mantle Cell Lymphoma
Summary: This phase I trial tests the safety and side effects of pacritinib in combination with a Bruton's tyrosine kinase (BTK) inhibitor and how well it works in treating patients with mantle cell lymphoma that has come back after a period of improvement (relapsed) or that has not responded to previous treatment (refractory). Pacritinib may stop the growth of tumor cells by blocking some of the enzymes n...
Phase I/II Study of Pacritinib, A JAK2/IRAK1/CSF1R Inhibitor, in Refractory Chronic Graft-Versus-Host Disease (cGVHD) After Allogeneic Hematopoietic Stem Cell Transplantation (HSCT)
Background: Chronic graft-versus-host disease (cGVHD) is an immune system disorder that can occur in people who have had a stem cell transplant. cGVHD can affect multiple organs and increase risk of disability and death. New treatments are needed to treat cGVHD after stem cell transplant.
A Phase 2 Trial Investigating Decitabine in Combination With a JAK-Inhibitor as a Bridge to Allogeneic Hematopoietic Stem Cell Transplant in Patients With Accelerated/Blast Phase Myeloproliferative Neoplasms
Summary: This phase II trial studies how well decitabine with ruxolitinib, fedratinib, or pacritinib works before hematopoietic stem cell transplant in treating patients with accelerated/blast phase myeloproliferative neoplasms (tumors). Drugs used in chemotherapy, such as decitabine, work in different ways to stop the growth of tumor cells, either by killing the cells, by stopping them from dividing, or b...
PAXIS: A Randomized, Double-blind, Placebo-controlled Dose-finding Phase 2 Study (Part 1) Followed by an Open-label Period (Part 2) to Assess the Efficacy and Safety of Pacritinib in Patients With VEXAS Syndrome
Summary: This trial is to assess the effectiveness and safety of pacritinib in patients with VEXAS (i.e., Vacuoles in myeloid progenitors, E1 ubiquitin-activating enzyme, X-linked, autoinflammatory manifestations, and somatic) syndrome. 78 participants will be enrolled, randomized to either pacritinib dose A, pacritinib dose B + placebo, or placebo. Randomization will be stratified by prescribed GC dose on...
Phase II Study of Pacritinib in Kaposi Sarcoma Herpesvirus (KSHV)-Associated Multicentric Castleman Disease and KSHV-Associated Inflammatory Cytokine Syndrome (KICS)
Background: Kaposi sarcoma herpesvirus (KSHV)-associated inflammatory cytokine syndrome (KICS) and KSHV-multicentric Castleman disease (MCD) occur in people living with HIV. These diseases cause severe inflammation that can be fatal if not treated.
A Randomized Phase 2 Study of Pacritinib vs. Hydroxyurea in Patients With Advanced Proliferative Chronic Myelomonocytic Leukemia
Summary: The goal of this clinical trial is to learn if pacritinib works better than hydroxyurea to treat advanced proliferative chronic myelomonocytic leukemia in adults. The main questions it aims to answer are: * Does pacritinib improve disease control compared to hydroxyurea? * What medical problems do participants have when taking pacritinib or hydroxyurea? Researchers will compare pacritinib to hydro...
A Phase 2 Trial Investigating the Addition of Pacritinib to a Hypomethylating Agent as a Bridge to Allogeneic Hematopoietic Stem Cell Transplant in Patients With Accelerated and Blast Phase Myeloproliferative Neoplasms
Summary: This phase II trial tests if adding pacritinib to standard of care azacitidine or decitabine increases the number of patients able to proceed to hematopoietic stem cell transplantation (bridging) for patients with accelerated and blast phase myeloproliferative neoplasms. Pacritinib may stop the growth of cancer cells by blocking some of the enzymes needed for cell growth. Azacitidine and decitabin...
A Randomized, Controlled Phase 3 Study of Pacritinib Versus Physician's Choice in Patients With Primary Myelofibrosis, Post Polycythemia Vera Myelofibrosis, or Post-Essential Thrombocythemia Myelofibrosis With Severe Thrombocytopenia (Platelet Count <50,000/μL)(PACIFICA)
Summary: This study (study ID PAC203 North America; PAC303 ex-North America) is evaluating 200 mg BID of pacritinib compared to physician's choice (P/C) therapy in patients with MF and severe thrombocytopenia (platelet count \<50,000/μL). Approximately 399 patients in total will be enrolled, randomized 2:1 to either pacritinib (approximately 266 patients) or to P/C therapy (approximately 133 patients) Cond...
A Phase 2 Study to Evaluate the Efficacy and Safety of Selinexor Monotherapy in Subjects With JAK Inhibitor-naïve Myelofibrosis and Moderate Thrombocytopenia
Summary: The main purpose of this study is to evaluate the efficacy of selinexor in JAKi-naïve participants with myelofibrosis (MF) and with normal platelet counts or with mild to moderate thrombocytopenia based on spleen volume reduction (SVR). Additional efficacy and safety parameters will also be assessed during the study.
Phase 2, Open Label, Multicenter Study of Pacritinib in Relapsed/Refractory T-cell Lymphoproliferative Neoplasms
Summary: The main purpose of this study is to determine the effectiveness of the study drug pacritinib in people with relapsed or refractory lymphoproliferative disorders.
A Phase 2 Study to Evaluate the Safety and Efficacy of Pacritinib in Relapsed or Refractory Waldenström Macroglobulinemia
Summary: This study is being done to examine the safety and effectiveness of pacritinib as a possible treatment for participants with Waldenström macroglobulinemia (WM). The name of the study drug involved in this study is: -Pacritinib (a type of kinase inhibitor)
Last Updated: 04/28/2026