Oral Pacritinib Versus Best Available Therapy to Treat Myelofibrosis With Thrombocytopenia (PAC326)

This study is currently recruiting participants. (see Contacts and Locations)
Verified October 2014 by CTI BioPharma
Sponsor:
Information provided by (Responsible Party):
CTI BioPharma
ClinicalTrials.gov Identifier:
NCT02055781
First received: February 3, 2014
Last updated: October 20, 2014
Last verified: October 2014
  Purpose

The primary hypothesis of the study is that treatment with either once-daily or twice-daily pacritinib results in a greater proportion of patients with thrombocytopenia and myelofibrosis achieving ≥ 35% reduction in spleen volume from baseline to Week 24 than treatment with Best Available Therapy, and a greater proportion of patients achieving a ≥ 50% reduction in total symptom score from baseline to Week 24 as measured by the Myeloproliferative Neoplasm Symptom Assessment Form 2.0.


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

Study Type: Interventional
Study Design: Allocation: Randomized
Endpoint Classification: Safety/Efficacy Study
Intervention Model: Parallel Assignment
Masking: Open Label
Primary Purpose: Treatment
Official Title: A Randomized Controlled Phase 3 Study of Oral Pacritinib Versus Best Available Therapy in Patients With Thrombocytopenia and Primary Myelofibrosis, Post-Polycythemia Vera Myelofibrosis, or Post-Essential Thrombocythemia Myelofibrosis

Resource links provided by NLM:


Further study details as provided by CTI BioPharma:

Primary Outcome Measures:
  • Efficacy [ Time Frame: Baseline to Week 24 ] [ Designated as safety issue: No ]
    To compare the efficacy of two dose-schedule arms of pacritinib (pooled once-daily and twice-daily dosing arms) with that of Best Available Therapy in patients with thrombocytopenia and primary myelofibrosis, post-polycythemia vera myelofibrosis, or post-essential thrombocythemia myelofibrosis; the efficacy measure for this analysis is the proportion of patients achieving a ≥ 35% reduction in spleen volume from baseline to week 24 by magnetic resonance imaging (MRI) or computed tomography (CT) and the proportion of patients achieving a ≥ 50% reduction in total symptom score from baseline to Week 24 as measured by the Myeloproliferative Neoplasm Symptom Assessment Form 2.0.


Secondary Outcome Measures:
  • Efficacy [ Time Frame: Baseline to Week 24 ] [ Designated as safety issue: No ]
    To compare the efficacy of once-daily pacritinib with that of Best Available Therapy, as assessed by the proportion of patients achieving a ≥ 35% reduction in spleen volume from baseline to Week 24 by magnetic resonance imaging (MRI) or computed tomography (CT) and the proportion of patients achieving a ≥ 50% reduction in the total symptom score from baseline to Week 24 on the Myeloproliferative Neoplasm Symptom Assessment Form 2.0.

  • Efficacy [ Time Frame: Baseline to Week 24 ] [ Designated as safety issue: No ]
    To compare the efficacy of twice-daily pacritinib with that of Best Available Therapy, as assessed by the proportion of patients achieving a ≥ 35% reduction in spleen volume from baseline to Week 24 by magnetic resonance imaging (MRI) or computed tomography (CT) and the proportion of patients achieving a ≥ 50% reduction in the total symptom score from baseline to Week 24 on the myeloproliferate Neoplasm Symptom Assessment Form 2.0.


Estimated Enrollment: 300
Study Start Date: December 2013
Estimated Study Completion Date: April 2018
Estimated Primary Completion Date: April 2015 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: Pacritinib, Once Daily
Pacritinib 400 mg taken orally, once daily
Drug: Pacritinib
Experimental: Pacritinib, Twice Daily
Pacritinib 200 mg taken orally, twice daily
Drug: Pacritinib
Active Comparator: Best Available Therapy
Best Available Therapy includes any physician-selected treatment for primary myelofibrosis, post-polycythemia vera myelofibrosis, or post-essential thrombocythemia myelofibrosis, such as approved JAK2 inhibitors, and may include any treatment received before study entry. Best Available Therapy may include ruxolitinib, other approved JAK2 inhibitors, hydroxyurea, glucocorticoids, erythropoietic agents, immunomodulatory agents, mercaptopurine, danazol, interferons, cytarabine, melphalan, or other agents and may also include no treatment and symptom-directed treatment without myelofibrosis-specific treatment.
Drug: Best Available Therapy

  Eligibility

Ages Eligible for Study:   18 Years and older
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   No
Criteria

Inclusion Criteria:

  • Intermediate -1 or -2 or high-risk Myelofibrosis (per Passamonti et al 2010)
  • Thrombocytopenia (platelet count ≤ 100,000/µL) at any time after signing informed consent
  • 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
  • At least 6 months from prior splenic irradiation
  • At least 1-4 weeks since prior myelofibrosis therapy, including any erythropoietic or thrombopoietic agent
  • Not pregnant, not lactating, and agree to use effective birth control
  • Able and willing to undergo frequent MRI or CT assessments and complete symptom assessments using a patient-reported outcome instrument

Exclusion Criteria:

  • Prior treatment with more than 2 JAK2 inhibitors or with pacritinib
  • There is no maximum cumulative prior JAK2 inhibitor treatment
  • 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
  • Active bleeding that requires hospitalization during the screening period
  • 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
  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its ClinicalTrials.gov identifier: NCT02055781

Contacts
Contact: Valentina Zhukova-Harrill, MD +44 (0) 131-200-6320
Contact: Gordon Thomson, PM +44 (0) 131-440-6441

  Show 59 Study Locations
Sponsors and Collaborators
CTI BioPharma
Investigators
Study Director: Mary Campbell, MD CTI BioPharma
  More Information

No publications provided

Responsible Party: CTI BioPharma
ClinicalTrials.gov Identifier: NCT02055781     History of Changes
Other Study ID Numbers: PERSIST-2 (PAC326)
Study First Received: February 3, 2014
Last Updated: October 20, 2014
Health Authority: United States: Food and Drug Administration

Keywords provided by CTI BioPharma:
Myelofibrosis
Post-Polycythemia Vera Myelofibrosis
Post-Essential Thrombocythemia Myelofibrosis
Primary Myelofibrosis
Polycythemia
Polycythemia Vera
Thrombocythemia, Essential
Thrombocythemia
Myeloproliferative Disorders
Bone Marrow Disease
Hematologic Diseases
Blood Platelet Disorders
Hemorrhagic Disorders
Splenomegaly
Pacritinib
MPN-SAF
MPN-SAF TSS
Anemia
Myeloproliferative
Myeloproliferative Neoplasm
Spleen
Spleen volume
Thrombocytopenia
SB1518

Additional relevant MeSH terms:
Polycythemia
Polycythemia Vera
Primary Myelofibrosis
Thrombocythemia, Essential
Thrombocytopenia
Thrombocytosis
Blood Coagulation Disorders
Blood Platelet Disorders
Bone Marrow Diseases
Hematologic Diseases
Hemorrhagic Disorders
Myeloproliferative Disorders

ClinicalTrials.gov processed this record on October 21, 2014