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P1101 in Treating Patients With Myelofibrosis

Phase II Study of P1101 in Early Myelofibrosis

Status
Terminated
Phases
Phase 2
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT02370329
Enrollment
11
Registered
2015-02-24
Start date
2015-08-12
Completion date
2023-11-30
Last updated
2025-10-27

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Primary Myelofibrosis, Secondary Myelofibrosis

Brief summary

This pilot phase II trial studies P1101 (polyethyleneglycol \[PEG\]-proline-interferon alpha-2b) in treating patients with myelofibrosis. PEG-proline-interferon alpha-2b is a substance that can improve the body's natural response and may slow the growth of myelofibrosis.

Detailed description

PRIMARY OBJECTIVE: I. To evaluate for clinical response (complete remission \[CR\], partial remission \[PR\], or clinical improvement \[CI\]) as defined by International Working Group-Myeloproliferative Neoplasms Research and Treatment (IWG-MRT) criteria in a cohort of intermediate-2/high risk myelofibrosis (MF) patients. Response in a second cohort of early stage MF patients will also be described. SECONDARY OBJECTIVES: I. To evaluate the adverse event profile of P1101 in patients with myelofibrosis by cohort (early vs intermediate-2/high risk). II. To evaluate the tolerability of P1101 in patients with myelofibrosis by cohort (early vs intermediate-2/high risk). EXPLORATORY AND CORRELATIVE RESEARCH OBJECTIVES: I. To evaluate quality of life (QOL) and patient-reported symptoms using the Myeloproliferative Neoplasm Symptom Assessment Form (MPN-SAF) with P1101 for patients with myelofibrosis by cohort (early vs intermediate-2/high risk). II. To evaluate the impact of P1101 on bone marrow and histological features of myelofibrosis including cytogenetics, blast percentage, fibrosis, and JAK2-V617F allele burden by cohort (early vs intermediate-2/high risk). OUTLINE: Patients receive PEG-proline-interferon alpha-2b subcutaneously (SC) on days 1 and 15. Courses repeat every 28 days in the absence of disease progression or unacceptable toxicity. After completion of study treatment, patients are followed up every 3-6 months for 3 years.

Interventions

OTHERLaboratory Biomarker Analysis

Correlative studies

OTHERQuality-of-Life Assessment

Ancillary studies

Given SC

Sponsors

Mayo Clinic
Lead SponsorOTHER

Study design

Allocation
NA
Intervention model
SINGLE_GROUP
Primary purpose
TREATMENT
Masking
NONE

Eligibility

Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
No

Inclusion criteria

* Evaluable myelofibrosis by IWG-MRT criteria including one or more of the following: * Spleen \>= 5 cm below the left costal margin * MPN-SAF total symptom score (TSS) \> 10 at baseline * Hemoglobin \< 10 g/dL * Confirmed diagnosis of myelofibrosis (primary myelofibrosis or myelofibrosis secondary to essential thrombocythemia or polycythemia vera) by World Health Organization (WHO) diagnostic criteria (3 major and 2 minor criteria: major criteria: megakaryocyte proliferation and atypia with either reticulin and/or collagen fibrosis, not meeting criteria for chronic myelogenous leukemia \[CML\], polycythemia vera \[PV\], myelodysplastic syndrome \[MDS\], or other myeloid neoplasm, JAK2V617F or other clonal marker or no evidence of reactive marrow fibrosis; minor criteria: leukoerythroblastosis, increased lactate dehydrogenase \[LDH\], anemia, palpable splenomegaly) * For cohort 1: early stage MF (low or intermediate 1 stage as defined by Dynamic International Prognostic Scoring System \[DIPSS\]) without currently available treatment options * For cohort 2: intermediate-2 or high risk MF patients as defined by DIPSS either not eligible for ruxolitinib or having failed under ruxolitinib * No prior treatment for myelofibrosis (for cohort 1 only) * Eastern Cooperative Oncology Group (ECOG) performance status (PS) 0, 1 or 2 * Platelet count \>= 100,000/mm\^3 (obtained =\< 14 days prior to registration) * Absolute neutrophil count (ANC) \>= 1000/mm\^3 (obtained =\< 14 days prior to registration) * Aspartate transaminase (AST) =\< 2.5 x upper limit of normal (ULN) (obtained =\< 14 days prior to registration) * Alanine aminotransferase (ALT) =\< 2.5 x ULN (obtained =\< 14 days prior to registration) * Calculated creatinine clearance must be \>= 50 ml/min using the Cockcroft-Gault formula (obtained =\< 14 days prior to registration) * Negative pregnancy test done =\< 7 days prior to registration, for women of childbearing potential only * Ability to complete questionnaire(s) by themselves or with assistance * Provide informed written consent * Willing to return to enrolling institution for follow-up * Willing to provide blood samples for correlative research purposes

Exclusion criteria

* Patients who have had chemotherapy or radiation =\< 2 weeks of registration * For cohort 1 only: patients with evidence of intermediate 2 or high risk disease (according to DIPSS) * For cohort 1 only: patients with a bone marrow biopsy with \< 15% cellularity, evidence of collagen fibrosis, osteosclerosis, or blasts \> 10% in peripheral blood or marrow (demonstrating advanced disease) * Patients who have received a prior stem cell transplant * Patients who have received radiation to the spleen within 3 months prior to registration * Patients with intolerance to compounds similar to pegylated interferon alpha-2b * Patients with evidence of \>= grade 2 peripheral sensory neuropathy * Any of the following: * Pregnant women * Nursing women * Men or women of childbearing potential who are unwilling to employ adequate contraception * Co-morbid systemic illnesses or other severe concurrent disease which, in the judgment of the investigator, would make the patient inappropriate for entry into this study or interfere significantly with the proper assessment of safety and toxicity of the prescribed regimens * Immunocompromised patients or patients known to be human immunodeficiency virus (HIV) positive and currently receiving antiretroviral therapy * Uncontrolled simultaneous illness including, but not limited to, ongoing or active infection, symptomatic congestive heart failure, unstable angina pectoris, cardiac arrhythmia, history of depression, or psychiatric illness/social situations that would limit compliance with study requirements * Receiving any other investigational agent which would be considered as a treatment for the primary neoplasm * History of myocardial infarction =\< 6 months prior to registration, or congestive heart failure requiring use of ongoing maintenance therapy for life-threatening ventricular arrhythmias * History of significant or major funduscopic findings including, but not limited to, retinal exudates, hemorrhage, detachment, neovascularization, papilledema, optic atrophy, micro-aneurysm or macular changes * Other active malignancy at time of registration; EXCEPTIONS: non-melanotic skin cancer or carcinoma-in-situ of the cervix

Design outcomes

Primary

MeasureTime frameDescription
Best Overall Response (Complete Remission, Partial Remission, or Clinical Improvement) as Determined by International Working Group CriteriaUp to 3 yearsPatients will be assessed for response according to the Revised International Working Group for Myeloproliferative Neoplasms Research and Treatment criteria.

Secondary

MeasureTime frameDescription
Progression-free Survival TimeUp to 3 yearsThe distribution of survival time will be estimated using the method of Kaplan-Meier.
Number of Patients Experiencing a Grade 3+ Adverse Event, as Measured by National Cancer Institute Common Terminology Criteria for Adverse Events Version 4.0 (NCI CTCAE v4)Up to 3 yearsThe maximum grade for each type of adverse event will be recorded for each patient, and frequency tables will be reviewed to determine patterns. Additionally, the relationship of the adverse event(s) to the study treatment will be taken into consideration.

Other

MeasureTime frameDescription
Changes in Patient-reported Symptoms and QOL as Measured by MPN-SAFBaseline to up to 3 yearsPatient-reported symptoms and QOL will be described at each time point using the mean, confidence interval, median, and range. Changes in individual symptoms, changes in a symptom scale composed of symptoms specific to MF patients, and changes in the MPN TSS will be investigated. Graphical procedures will include stream plots of individual patient scores and plots of average values over time. Correlational analyses will be done to determine the relationships among patients-reported symptoms and QOL, as well as with clinical outcomes and clinician-assessed symptoms.

Countries

United States

Participant flow

Participants by arm

ArmCount
Treatment (PEG-proline-interferon alpha-2b)
Patients receive PEG-proline-interferon alpha-2b SC on days 1 and 15. Courses repeat every 28 days in the absence of disease progression or unacceptable toxicity. All patients will be started at a dose level of 100 micrograms (mcg) every other week, and then dose will be titrated up by 50mcg increments to a maximum dose of 300mcg every other week as tolerated. \> \> Laboratory Biomarker Analysis: Correlative studies \> \> Quality-of-Life Assessment: Ancillary studies \> \> Ropeginterferon Alfa-2B: Given SC
11
Total11

Withdrawals & dropouts

PeriodReasonFG000
Overall StudyAdverse Event1
Overall StudyAlternate treatment1
Overall StudyDisease progression3
Overall StudyPhysician Decision2
Overall StudyStudy closure4

Baseline characteristics

CharacteristicTreatment (PEG-proline-interferon alpha-2b)
Age, Continuous69 years
ECOG Performance Status
0
8 Participants
ECOG Performance Status
1
2 Participants
ECOG Performance Status
2
1 Participants
Ethnicity (NIH/OMB)
Hispanic or Latino
0 Participants
Ethnicity (NIH/OMB)
Not Hispanic or Latino
10 Participants
Ethnicity (NIH/OMB)
Unknown or Not Reported
1 Participants
Myelofibrosis Risk Stage
Intermediate-2/high risk stage
7 Participants
Myelofibrosis Risk Stage
Low/Intermediate-1 risk stage
4 Participants
Race (NIH/OMB)
American Indian or Alaska Native
0 Participants
Race (NIH/OMB)
Asian
0 Participants
Race (NIH/OMB)
Black or African American
0 Participants
Race (NIH/OMB)
More than one race
0 Participants
Race (NIH/OMB)
Native Hawaiian or Other Pacific Islander
0 Participants
Race (NIH/OMB)
Unknown or Not Reported
0 Participants
Race (NIH/OMB)
White
11 Participants
Region of Enrollment
United States
11 participants
Sex: Female, Male
Female
5 Participants
Sex: Female, Male
Male
6 Participants

Adverse events

Event typeEG000
affected / at risk
deaths
Total, all-cause mortality
3 / 11
other
Total, other adverse events
11 / 11
serious
Total, serious adverse events
8 / 11

Outcome results

Primary

Best Overall Response (Complete Remission, Partial Remission, or Clinical Improvement) as Determined by International Working Group Criteria

Patients will be assessed for response according to the Revised International Working Group for Myeloproliferative Neoplasms Research and Treatment criteria.

Time frame: Up to 3 years

ArmMeasureGroupValue (COUNT_OF_PARTICIPANTS)
Treatment (PEG-proline-interferon alpha-2b)Best Overall Response (Complete Remission, Partial Remission, or Clinical Improvement) as Determined by International Working Group CriteriaProgression1 Participants
Treatment (PEG-proline-interferon alpha-2b)Best Overall Response (Complete Remission, Partial Remission, or Clinical Improvement) as Determined by International Working Group CriteriaClinical Improvement7 Participants
Treatment (PEG-proline-interferon alpha-2b)Best Overall Response (Complete Remission, Partial Remission, or Clinical Improvement) as Determined by International Working Group CriteriaStable Disease3 Participants
Secondary

Number of Patients Experiencing a Grade 3+ Adverse Event, as Measured by National Cancer Institute Common Terminology Criteria for Adverse Events Version 4.0 (NCI CTCAE v4)

The maximum grade for each type of adverse event will be recorded for each patient, and frequency tables will be reviewed to determine patterns. Additionally, the relationship of the adverse event(s) to the study treatment will be taken into consideration.

Time frame: Up to 3 years

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
Treatment (PEG-proline-interferon alpha-2b)Number of Patients Experiencing a Grade 3+ Adverse Event, as Measured by National Cancer Institute Common Terminology Criteria for Adverse Events Version 4.0 (NCI CTCAE v4)10 Participants
Secondary

Progression-free Survival Time

The distribution of survival time will be estimated using the method of Kaplan-Meier.

Time frame: Up to 3 years

ArmMeasureValue (MEDIAN)
Treatment (PEG-proline-interferon alpha-2b)Progression-free Survival TimeNA months
Other Pre-specified

Changes in Patient-reported Symptoms and QOL as Measured by MPN-SAF

Patient-reported symptoms and QOL will be described at each time point using the mean, confidence interval, median, and range. Changes in individual symptoms, changes in a symptom scale composed of symptoms specific to MF patients, and changes in the MPN TSS will be investigated. Graphical procedures will include stream plots of individual patient scores and plots of average values over time. Correlational analyses will be done to determine the relationships among patients-reported symptoms and QOL, as well as with clinical outcomes and clinician-assessed symptoms.

Time frame: Baseline to up to 3 years

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026