Clofarabine and Gemtuzumab in Treating Patients With Relapsed or Refractory Acute Myeloid Leukemia

Study Overview
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Brief Summary
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RATIONALE: Drugs used in chemotherapy, such as clofarabine, work in different ways to stop the growth of cancer cells, either by killing the cells or by stopping them from dividing. Monoclonal antibodies, such as gemtuzumab, can block cancer growth in different ways. Some block the ability of cancer cells to grow and spread. Others find cancer cells and help kill them or carry cancer-killing substances to them. Giving clofarabine together with gemtuzumab may kill more cancer cells. PURPOSE: This phase I trial is studying the side effects and best dose of clofarabine when given together with gemtuzumab in treating patients with relapsed or refractory acute myeloid leukemia.

Detailed Description
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OBJECTIVES: Primary Identify the maximum tolerated dose and dose-limiting toxicities of clofarabine when administered with gemtuzumab ozogamicin in patients with refractory acute myeloid leukemia (AML) or with AML that has relapsed within 1 year after cytarabine-containing therapy. Secondary Estimate the rates of complete response and/or partial complete response with incomplete platelet recovery in patients treated with this regimen. Estimate the duration of remission in patients treated with this regimen and not proceeding to high-dose therapy and allogeneic stem cell transplantation. Estimate the frequency with which patients enrolled on this study proceed to allogeneic or autologous blood or bone marrow stem cell transplantation. OUTLINE: This is a dose-escalation study of clofarabine. Patients receive induction therapy comprising clofarabine IV on days 1-5 and gemtuzumab ozogamicin IV over 2 hours on days 1, 4, and 7 during course 1 only. Beginning in course 2, after blood counts recover, patients receive consolidation therapy comprising clofarabine IV on days 1-5. Consolidation treatment repeats upon blood count recovery for up to 2 courses in the absence of disease progression or unacceptable toxicity. After completion of study therapy, patients in remission after consolidation therapy are followed monthly for the first 6 months, and then every 3-4 months for 2 years.

Official Title
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A Nonrandomized Dose-escalation Study of Clofarabine in Combination With Gemtuzumab Ozogamicin for Relapsed/Refractory Acute Myeloid Leukemia (AML) for Patients Less Than 60 Years-old

Conditions
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Leukemia

Intervention / Treatment
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* Drug: clofarabine
* Drug: gemtuzumab ozogamicin


Participation Criteria
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Eligibility Criteria
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DISEASE CHARACTERISTICS: Diagnosis of acute myeloid leukemia (AML) meeting 1 of the following criteria: Refractory disease, defined as persistent or progressive disease after ≥ 2 induction regimens, including ≥ 1 course of high-dose cytarabine (ARA-C) Relapsed disease that has recurred within 1 year of an ARA-C-containing chemotherapy regimen No CNS disease requiring radiotherapy Patients with neurological symptoms must undergo a lumbar puncture and a CT scan or MRI of the brain to exclude brain metastasis PATIENT CHARACTERISTICS: ECOG performance status 0-2 Total bilirubin ≤ 2.0 times upper limit of normal (ULN) ALT and AST ≤ 2.0 times the ULN Serum creatinine ≤ 1.0 mg/dL OR glomerular filtration rate > 60 mL/min INR ≤ 1.5 and aPTT within ULN Patients receiving anticoagulation therapy (e.g., warfarin or heparin) are eligible provided anticoagulation therapy can be discontinued or changed to parenteral medications while the platelet count is less than 50,000/mm³ Negative pregnancy test Fertile patients must use effective contraception No concurrent active second primary malignancy (excluding superficial, non-invasive skin cancers) No active bleeding diathesis, not including closely monitored therapeutic anticoagulation No cardiac disease, including any of the following: New York Heart Association class II-IV congestive heart failure Unstable angina (i.e., anginal symptoms at rest) New onset angina (i.e., began within the past 3 months) Myocardial infarction within the past 6 months No active clinically serious infection > grade 2 No cerebrovascular accident, including transient ischemic attacks, within the past 6 months No pulmonary hemorrhage ≥ grade 2 within the past 4 weeks No other hemorrhage or bleeding event ≥ grade 3 within the past 4 weeks No known HIV infection or chronic hepatitis B or C No serious non-healing wound or ulcer More than 4 weeks since prior significant traumatic injury No prior history of sinusoidal obstructive syndrome (veno-occlusive disease) PRIOR CONCURRENT THERAPY: More than 4 weeks since prior major surgery or open biopsy More than 100 days since any prior hematopoietic stem cell transplant No concurrent treatment with any other investigational agent for AML Intrathecal chemotherapy administration is allow for central nervous system leukemic infiltration No prior allogeneic stem cell transplant within the past 100 days, with active graft-versus-host disease (GVHD) of any grade, or exposure to immynosuppression for GVHD or prophylaxis

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 60 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

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Other: single arm study<br>1 | Drug: clofarabine<br>* Intravenous, 20mg/m2, Days 1, 2, 3, 4 and 5; 2 cycles<br>* Other names: Clolar;Drug: gemtuzumab ozogamicin<br>* Intravenous, 3mg/m2, Day 1, one cycle<br>* Other names: Mylotarg;|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Maximum tolerated dose of clofarabine |  | 3 years | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Rate of complete response and/or partial complete response with incomplete platelet recovery |  | 3 years | 
| Duration of remission |  | 5 years | 
| Frequency of patients proceeding to allogeneic or autologous blood or bone marrow stem cell transplantation |  | 5 years | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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recurrent adult acute myeloid leukemia