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Pacritinib Versus Best Available Therapy to Treat Myelofibrosis

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT01773187
Recruitment Status : Terminated
First Posted : January 23, 2013
Results First Posted : September 29, 2020
Last Update Posted : September 29, 2020
Information provided by (Responsible Party):
CTI BioPharma

Brief Summary:
Phase 3, randomized, controlled study to evaluate the safety and efficacy of oral pacritinib compared to Best Available Therapy (BAT) in patients with primary or secondary myelofibrosis.

Condition or disease Intervention/treatment Phase
Primary Myelofibrosis Post-polycythemia Vera Myelofibrosis Post-essential Thrombocythemia Myelofibrosis Drug: Pacritinib Drug: Best Available Therapy Phase 3

Detailed Description:
Multicenter, randomized, controlled, phase 3 trial comparing the safety and efficacy of pacritinib with that of BAT in patients with primary or secondary myelofibrosis. Approximately 322 eligible patients will be randomized in a 2:1 allocation to pacritinib (400mg QD) or BAT (includes any physician-selected treatment for myelofibrosis with the exclusion of JAK inhibitors (inhibitors of Janus kinases)). Spleen volume will be measured by MRI or CT at baseline and every 12 weeks thereafter. An independent radiology facility (IRF), blind to treatment assignments, will measure spleen volumes. Patients will also be followed for safety, Leukemia Free Survival (LFS), Overall Survival (OS), frequency of red blood cell (RBC) and platelet transfusions, and other exploratory endpoints. An Independent Data Monitoring Committee (IDMC) will evaluate the safety of pacritinib.

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Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 327 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)
Primary Purpose: Treatment
Official Title: A Randomized Controlled Phase 3 Study of Oral Pacritinib Versus Best Available Therapy in Patients With Primary Myelofibrosis, Post-Polycythemia Vera Myelofibrosis, or Post-Essential Thrombocythemia Myelofibrosis
Actual Study Start Date : January 2013
Actual Primary Completion Date : January 2015
Actual Study Completion Date : April 2016

Arm Intervention/treatment
Experimental: Pacritinib
Pacritinib 400 mg QD
Drug: Pacritinib
Active Comparator: Best Available Therapy
BAT includes any physician-selected treatment for primary or secondary myelofibrosis with the exclusion of JAK inhibitors (inhibitors of Janus kinases)
Drug: Best Available Therapy

Primary Outcome Measures :
  1. Spleen Volume Reduction [ Time Frame: Baseline to Week 24 ]
    Number of patients achieving a ≥ 35% reduction in spleen volume from baseline to week 24 as measured by magnetic resonance imaging (MRI) or computed tomography (CT)

Secondary Outcome Measures :
  1. Total Symptom Score (TSS) Reduction [ Time Frame: Baseline to Week 24 ]
    Number of patients with >= 50% reduction in total score from baseline to week 24 on the Myeloproliferative Neoplasm Symptom Assessment Form 2.0 (MPN-SAF TSS 2.0). Responses (on a scale from 0 [absent] to 10 [worst imaginable]) to questions about symptoms (tiredness, early satiety, abdominal discomfort, night sweats, pruritus, bone pain, and pain under the ribs on the left side) were used to calculate the TSS.

Information from the National Library of Medicine

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Ages Eligible for Study:   18 Years and older   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Intermediate -1 or -2 or high-risk Myelofibrosis (per Passamonti et al 2010)
  • Palpable splenomegaly ≥ 5 cm on physical examination
  • Total Symptom Score >13 on the MPN-SAF TSS 2.0, not including the inactivity question
  • Patients who are platelet or red blood cell transfusion-dependent are eligible
  • Adequate white blood cell counts (with low blast counts), liver function, and renal function
  • No spleen radiation therapy for 6-12 months
  • Last therapy for myelofibrosis was 2-4 weeks ago, including any erythropoietic or thrombopoietic agent
  • Not pregnant, not lactating, and agree to use effective birth control

Exclusion Criteria:

  • Prior treatment with a JAK2 inhibitor
  • History of (or plans to undergo) spleen removal surgery or allogeneic stem cell transplant
  • Ongoing gastrointestinal medical condition such as Crohn's disease, Inflammatory bowel disease, chronic diarrhea, or constipation
  • Cardiovascular disease, including recent history or currently clinically symptomatic and uncontrolled: congestive heart failure, arrhythmia, angina, QTc prolongation or other QTc risk factors, myocardial infarction
  • Other malignancy within last 3 years other than certain limited skin, cervical, prostate, breast, or bladder cancers
  • Other ongoing, uncontrolled illnesses (including HIV infection and active hepatitis A, B, or C), psychiatric disorder, or social situation that would prevent good care on this study
  • Life expectancy < 6 months

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT01773187

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Sponsors and Collaborators
CTI BioPharma
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Study Director: Beth Ziemba VP, Pharmacovigilance, Clinical Operations, QA
Publications automatically indexed to this study by Identifier (NCT Number):
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Responsible Party: CTI BioPharma Identifier: NCT01773187    
Other Study ID Numbers: PERSIST-1 (PAC325)
First Posted: January 23, 2013    Key Record Dates
Results First Posted: September 29, 2020
Last Update Posted: September 29, 2020
Last Verified: September 2020

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Studies a U.S. FDA-regulated Drug Product: Yes
Studies a U.S. FDA-regulated Device Product: No
Keywords provided by CTI BioPharma:
Post-Polycythemia Vera Myelofibrosis
Post-Essential Thrombocythemia Myelofibrosis
Primary Myelofibrosis
Polycythemia Vera
Essential Thrombocythemia
Bone Marrow Disease
Hematologic Disease
Myeloproliferative Neoplasm
Spleen volume
Additional relevant MeSH terms:
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Polycythemia Vera
Primary Myelofibrosis
Thrombocythemia, Essential
Myeloproliferative Disorders
Bone Marrow Diseases
Hematologic Diseases
Bone Marrow Neoplasms
Hematologic Neoplasms
Neoplasms by Site
Blood Platelet Disorders
Blood Coagulation Disorders
Hemorrhagic Disorders