E.1 Medical condition or disease under investigation |
E.1.1 | Medical condition(s) being investigated |
Primary Myelofibrosis, Post-essential thrombocythemia myelofibrosis with Severe Thrombocytopenia (Platelet Counts <50,000/µL), Post polycythaemia vera myelofibrosis |
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E.1.1.1 | Medical condition in easily understood language |
Primary or Secondary Myelofibrosis (MF) |
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E.1.1.2 | Therapeutic area | Diseases [C] - Cancer [C04] |
MedDRA Classification |
E.1.2 Medical condition or disease under investigation |
E.1.2 | Version | 20.0 |
E.1.2 | Level | PT |
E.1.2 | Classification code | 10077161 |
E.1.2 | Term | Primary myelofibrosis |
E.1.2 | System Organ Class | 10029104 - Neoplasms benign, malignant and unspecified (incl cysts and polyps) |
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E.1.2 Medical condition or disease under investigation |
E.1.2 | Version | 21.0 |
E.1.2 | Level | LLT |
E.1.2 | Classification code | 10074692 |
E.1.2 | Term | Post essential thrombocythaemia myelofibrosis |
E.1.2 | System Organ Class | 10029104 - Neoplasms benign, malignant and unspecified (incl cysts and polyps) |
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E.1.2 Medical condition or disease under investigation |
E.1.2 | Version | 21.1 |
E.1.2 | Level | LLT |
E.1.2 | Classification code | 10074691 |
E.1.2 | Term | Post polycythaemia vera myelofibrosis |
E.1.2 | System Organ Class | 10029104 - Neoplasms benign, malignant and unspecified (incl cysts and polyps) |
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E.1.2 Medical condition or disease under investigation |
E.1.2 | Version | 20.0 |
E.1.2 | Level | PT |
E.1.2 | Classification code | 10028537 |
E.1.2 | Term | Myelofibrosis |
E.1.2 | System Organ Class | 10029104 - Neoplasms benign, malignant and unspecified (incl cysts and polyps) |
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E.1.3 | Condition being studied is a rare disease | Yes |
E.2 Objective of the trial |
E.2.1 | Main objective of the trial |
To compare the efficacy of pacritinib with that of physician’s choice (P/C) therapy, as assessed by the proportion of patients achieving a ≥35% spleen volume reduction (SVR) between baseline and Week 24 as measured by magnetic resonance imaging (MRI, preferred) or computed tomography (CT) scans |
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E.2.2 | Secondary objectives of the trial |
1. To compare the efficacy of pacritinib with P/C therapy, as assessed by the proportion of patients achieving a ≥50% reduction in Total Symptom Score (TSS) between baseline and Week 24
2. To compare the overall survival (OS) of patients treated with pacritinib versus those treated with P/C
3. To compare the percentage of patients who self-assess as “very much improved” or “much improved” as measured by the Patient Global Impression of Change (PGIC) in patients treated with pacritinib versus those treated with P/C
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E.2.3 | Trial contains a sub-study | No |
E.3 | Principal inclusion criteria |
1. PMF, PPV-MF, or PET-MF
2. Average platelet count of <50,000/µL at Screening (based on three measurements taken on different days; two measurements must be <50,000/µL, and none can be >60,000/µL)
3. DIPSS Intermediate-1, Intermediate-2, or High risk (Passamonti et al 2010)
4. Palpable splenomegaly ≥5 cm below the lower costal margin (LCM) in the midclavicular line as assessed by physical examination
5. TSS of ≥10 on the MPN-SAF TSS 2.0 or a single symptom score of ≥5 or two symptoms of ≥3, including only the symptoms of left upper quadrant pain, bone pain, itching, or night sweats
6. Age ≥18 years
7. Eastern Cooperative Oncology Group performance status 0 to 2
8. Peripheral blast count of <10% throughout the Screening period and at baseline
9. Absolute neutrophil count of ≥500/µL
10. Left ventricular cardiac ejection fraction of ≥50% by echocardiogram or multigated acquisition (MUGA) scan
11. Adequate liver and renal function, defined by liver transaminases (aspartate aminotransferase [AST]/serum glutamic-oxaloacetic transaminase [SGOT] and alanine aminotransferase [ALT]/serum glutamic pyruvic transaminase [SGPT]) ≤3 × the upper limit of normal (ULN) (AST/ALT ≤5 × ULN if transaminase elevation is related to MF), direct bilirubin ≤4 × ULN, and creatinine ≤2.5 mg/dL
12. Adequate coagulation defined by prothrombin time/international normalized ratio and partial thromboplastin time ≤1.5 × ULN
13. If fertile, willing to use effective birth control methods during the study
14. Willing to undergo and able to tolerate frequent MRI or CT scan assessments during the study
15. Able to understand and willing to complete symptom assessments using a patient-reported outcome instrument
16. Provision of signed informed consent |
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E.4 | Principal exclusion criteria |
1. Life expectancy <6 months
2. Completed allogeneic stem cell transplant (allo-SCT) or are eligible for and willing to complete allo-SCT
3. History of splenectomy or planning to undergo splenectomy
4. Splenic irradiation within the last 6 months
5. Previously treated with pacritinib
6. Treatment with any MF-directed therapy within 14 days prior to treatment Day 1
7. Any prior treatment with a JAK2 inhibitor for more than 90 days from the date of first administration. The 90-day JAK2 treatment period may overlap with the Screening period but may not extend to within 14 days prior to treatment Day 1.
8. Prior treatment with more than one JAK2 inhibitor
9. Treatment with an experimental therapy within 28 days prior to treatment Day 1
10. Systemic treatment with a strong CYP3A4 inhibitor or a strong cytochrome P450 (CYP450) inducer within 14 days prior to treatment Day 1
11. Significant recent bleeding history defined as National Cancer Institute Common Terminology Criteria for Adverse Events (CTCAE) grade ≥2 within 3 months prior to treatment Day 1, unless precipitated by an inciting event (e.g., surgery, trauma, or injury)
12. Systemic treatment with medications that increase the risk of bleeding, including anticoagulants, antiplatelet agents (except for aspirin dosages of ≤100 mg per day), anti-vascular endothelial growth factor (anti-vascular endothelial growth factor [VEGF]) agents, and daily use of COX-1 inhibiting nonsteroidal antiinflammatory drugs (NSAIDs) within 14 days prior to treatment Day 1
13. Systemic treatment with medications that can prolong the QT interval within 14 days prior to treatment Day 1
14. Any history of CTCAE grade ≥2 non-dysrhythmia cardiac conditions within 6 months prior to treatment Day 1. Patients with asymptomatic grade 2 nondysrhythmia cardiovascular conditions may be considered for inclusion, with the approval of the Medical Monitor, if stable and unlikely to affect patient safety.
15. Any history of CTCAE grade ≥2 cardiac dysrhythmias within 6 months prior to treatment Day 1. Patients with non-QTc CTCAE grade 2 cardiac dysrhythmias may be considered for inclusion, with the approval of the Medical Monitor, if the dysrhythmias are stable, asymptomatic, and unlikely to affect patient safety.
16. QT corrected by the Fridericia method (QTcF) prolongation >450 ms or other factors that increase the risk for QT interval prolongation (e.g., heart failure, hypokalemia [defined as serum potassium <3.0 mEq/L that is persistent and refractory to correction], or history of long QT interval syndrome
17. New York Heart Association Class II, III, or IV congestive heart failure
18. Any active gastrointestinal or metabolic condition that could interfere with absorption of oral medication
19. Active or uncontrolled inflammatory or chronic functional bowel disorder such as Crohn’s Disease, inflammatory bowel disease, chronic diarrhea, or chronic constipation
20. Other malignancy within 3 years prior to treatment Day 1, other than curatively treated basal cell or squamous cell skin or corneal cancer; curatively treated carcinoma in situ of the cervix; organ-confined prostate cancer with prostate-specific antigen (PSA) <20 ng/mL and National Comprehensive Cancer Network risk of Very Low, Low, or Favorable Intermediate; curatively treated non-metastatic prostate cancer with negative PSA; or in situ breast carcinoma after complete surgical resection
21. Uncontrolled intercurrent illness, including, but not limited to, ongoing active infection, psychiatric illness, or social situation that, in the judgment of the treating physician, would limit compliance with study requirements
22. Known seropositivity for human immunodeficiency virus
23. Known active hepatitis A, B, or C virus infection
24. Women who are pregnant or lactating
25. Concurrent enrollment in another interventional trial |
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E.5 End points |
E.5.1 | Primary end point(s) |
The primary efficacy endpoint is defined as the percentage of patients who achieve at least 35% reduction in spleen volume from baseline as measured by MRI (preferred) or CT scan at Week 24. Patients who do not have a Week 24 spleen assessment will be included as non-responders in this analysis
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E.5.1.1 | Timepoint(s) of evaluation of this end point |
The primary endpoint is measured at Week 24. |
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E.5.2 | Secondary end point(s) |
• The secondary efficacy endpoint TSS is defined as the percentage of patients with at least 50% reduction in TSS from baseline at Week 24.
• The secondary endpoint OS will be assessed for all randomized patients over the period of 2.5 years from randomization. The secondary endpoint OS is defined as the time between randomization and death.
• The secondary endpoint PGIC is defined as the percentage of patients who self-assess as “very much improved” or “much improved” at Week 24 |
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E.5.2.1 | Timepoint(s) of evaluation of this end point |
The secondary endpoints are measured at Week 24 and overall survival is measured at 2.5years.
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E.6 and E.7 Scope of the trial |
E.6 | Scope of the trial |
E.6.1 | Diagnosis | No |
E.6.2 | Prophylaxis | No |
E.6.3 | Therapy | No |
E.6.4 | Safety | Yes |
E.6.5 | Efficacy | Yes |
E.6.6 | Pharmacokinetic | No |
E.6.7 | Pharmacodynamic | Yes |
E.6.8 | Bioequivalence | No |
E.6.9 | Dose response | No |
E.6.10 | Pharmacogenetic | Yes |
E.6.11 | Pharmacogenomic | No |
E.6.12 | Pharmacoeconomic | No |
E.6.13 | Others | No |
E.7 | Trial type and phase |
E.7.1 | Human pharmacology (Phase I) | No |
E.7.1.1 | First administration to humans | No |
E.7.1.2 | Bioequivalence study | No |
E.7.1.3 | Other | No |
E.7.1.3.1 | Other trial type description | |
E.7.2 | Therapeutic exploratory (Phase II) | No |
E.7.3 | Therapeutic confirmatory (Phase III) | Yes |
E.7.4 | Therapeutic use (Phase IV) | No |
E.8 Design of the trial |
E.8.1 | Controlled | Yes |
E.8.1.1 | Randomised | Yes |
E.8.1.2 | Open | Yes |
E.8.1.3 | Single blind | No |
E.8.1.4 | Double blind | No |
E.8.1.5 | Parallel group | No |
E.8.1.6 | Cross over | No |
E.8.1.7 | Other | No |
E.8.2 | Comparator of controlled trial |
E.8.2.1 | Other medicinal product(s) | Yes |
E.8.2.2 | Placebo | No |
E.8.2.3 | Other | No |
E.8.2.4 | Number of treatment arms in the trial | 2 |
E.8.3 |
The trial involves single site in the Member State concerned
| No |
E.8.4 | The trial involves multiple sites in the Member State concerned | Yes |
E.8.4.1 | Number of sites anticipated in Member State concerned | 8 |
E.8.5 | The trial involves multiple Member States | Yes |
E.8.5.1 | Number of sites anticipated in the EEA | 60 |
E.8.6 Trial involving sites outside the EEA |
E.8.6.1 | Trial being conducted both within and outside the EEA | Yes |
E.8.6.2 | Trial being conducted completely outside of the EEA | No |
E.8.6.3 | If E.8.6.1 or E.8.6.2 are Yes, specify the regions in which trial sites are planned |
Australia |
Austria |
Canada |
Czech Republic |
France |
Germany |
Hungary |
Israel |
Italy |
Korea, Republic of |
New Zealand |
Poland |
Spain |
Sweden |
Ukraine |
United Kingdom |
United States |
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E.8.7 | Trial has a data monitoring committee | Yes |
E.8.8 |
Definition of the end of the trial and justification where it is not the last
visit of the last subject undergoing the trial
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E.8.9 Initial estimate of the duration of the trial |
E.8.9.1 | In the Member State concerned years | 5 |
E.8.9.1 | In the Member State concerned months | 5 |
E.8.9.1 | In the Member State concerned days | 27 |
E.8.9.2 | In all countries concerned by the trial years | 5 |
E.8.9.2 | In all countries concerned by the trial months | 10 |
E.8.9.2 | In all countries concerned by the trial days | 16 |