Low-Dose Decitabine in Treating Patients With Symptomatic Myelofibrosis

Study Overview
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Brief Summary
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RATIONALE: Drugs used in chemotherapy, such as decitabine, work in different ways to stop the growth of cancer cells, either by killing the cells or by stopping them from dividing. PURPOSE: This phase II trial is studying the side effects and how well low-dose decitabine works in treating patients with symptomatic myelofibrosis.

Detailed Description
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OBJECTIVES: Determine the efficacy and safety of low-dose decitabine in patients with symptomatic primary myelofibrosis (PMF) or post essential thrombocythemic (ET) or polycythemic vera (PV) myelofibrosis. Analyze the ability of this drug to decrease pathologic angiogenesis and other stromal reactive features intrinsic to PMF or post ET/PV myelofibrosis. OUTLINE: Patients receive low-dose decitabine IV over 1 hour on days 1-5. Treatment repeats every 28 days for up to 6 courses in the absence of disease progression or unacceptable toxicity. Patients achieving partial remission, complete remission, or clinical improvement may receive up to 12 courses of decitabine in the absence of disease progression or unacceptable toxicity. After completion of study therapy, patients are followed periodically for up to 3 years.

Official Title
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Phase II Trial of Low Dose Decitabine (Dacogen) in Patients With Primary Myelofibrosis and Post ET/PV Myelofibrosis

Conditions
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Chronic Myeloproliferative Disorders, Secondary Myelofibrosis

Intervention / Treatment
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* Drug: Dacogen


Participation Criteria
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Eligibility Criteria
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DISEASE CHARACTERISTICS: Histological confirmation of primary myelofibrosis or post essential thrombocythemic or polycythemic vera myelofibrosis Reticulin fibrosis ≥ grade 1 Evaluable and symptomatic disease worthy of treatment, characterized by ≥ 1 of the following: Anemia, defined as hemoglobin < 11 g/dL or erythrocyte transfusion dependence Palpable and symptomatic splenomegaly (palpable and symptomatic hepatomegaly is acceptable if previously splenectomized) Severe, disease-related constitutional symptoms, including ≥ 1 of the following: Severe night sweats Fevers Weight loss Bone pain Absence of t(9;22) by fluorescent in situ hybridization (FISH) or standard cytogenetics OR prior demonstration of a lack of this translocation PATIENT CHARACTERISTICS: Eastern Co-operative Oncology Group (ECOG) performance status 0-3 Absolute neutrophil count (ANC) ≥ 1,000/mm³ Platelet count ≥ 50,000/mm³ Creatinine ≤ 2.0 mg/dL Direct or total bilirubin ≤ 2.0 mg/dL Aspartate aminotransferase (AST) and alanine aminotransferase (ALT) ≤ 3 times upper limit of normal (ULN) (≤ 5 times ULN if elevation is attributed to hepatic extramedullary hematopoiesis) Not pregnant or nursing Negative pregnancy test Fertile patients must use effective contraception Not incarcerated in a municipality, county, state, or federal prison No serious medical condition or psychiatric illness that would preclude signing the informed consent No condition that, in the opinion of the treating physician, places the patient at unacceptable risk for study participation or confounds the ability to interpret study data Able to adhere to the study visit schedule and other study requirements PRIOR CONCURRENT THERAPY: No other concurrent chemotherapy (e.g., hydroxyurea, thalidomide, interferon alpha, anagrelide, or other myelosuppressive agent) or experimental therapy

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 120 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Intervention Model: Single Group Assignment
Masking: None (Open Label)


Arms and Interventions

| Intervention/Treatment |
| --- |
|Drug: Dacogen|nan|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Number of Participants Who Achieve a Confirmed Response (Complete Remission (CR), Partial Remission (PR), or Clinical Improvement (CI)), According to International Working Group (IWG) Consensus Criteria. | Confirmed response: objective status of CR, PR, or CI on 2 consecutive evaluations >=4 weeks apart. CR:Complete resolution of disease-related symptoms and signs; peripheral blood count remission; normal leukocyte differential; bone marrow histologic remission. PR: All criteria for CR except the bone marrow histologic remission. CI: one of the following in the absence of both disease progression and CR/PR: minimum (MI) 20-g/L increase (INC) in hemoglobin level; MI 50% reduction in palpable splenomegaly (>=10cm); MI 100% INC in platelet count(>=50000x10^9/L) or ANC (>=0.5x10^9/L) | Every 4 weeks during treatment (up to 16 weeks) | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Overall Survival(OS) | OS was defined as the time from registration to death of any cause. | up to 3 years | 
| Time to Disease Progression | Time to disease progression is defined as the time from registration to progression of disease or death due to any cause. Progression was defined as any one or more of the following: 1)progressive splenomegaly; 2) leukemic transformation confirmed by a bone marrow blast count of >= 20%; 3) an increase in peripheral blood blast percentage of >=20% that lasts for >= 8 weeks. | up to 3 years | 
| Number of Participants With Constitutional Symptoms | Constitutional symptoms including the presence of one or more of the following felt to be attributed to the disease: severe night sweats, fevers, weight loss and bone pain. Symptoms were assessed every cycle during treatment. | Up to 48 weeks | 
| Number of Participants With Severe Adverse Events | Severe adverse events were defined as grade 3 or higher, regardless of attribution to study drugs. Adverse events were graded according to the National Cancer Institute Common Terminology Criteria for Adverse Events (NCI CTCAE) version 3. Adverse events were assessed every cycle during treatment. | Up to 48 weeks | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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primary myelofibrosis, secondary myelofibrosis, essential thrombocythemia, polycythemia vera