Evaluating the Safety of Zileuton (Zyflo®) in Combination With Dasatinib (Sprycel®) in Chronic Myelogenous Leukemia

Overview

Prospective nonrandomized phase I study The purpose of this study is to determine safety and efficacy of zileuton when added to dasatinib in patients with chronic myelogenous leukemia (CML).

Full Title of Study: “Phase I Study to Evaluate the Safety of Zileuton (Zyflo®) in Combination With Dasatinib (Sprycel®) in Patients With Chronic Myelogenous Leukemia”

Study Type

  • Study Type: Interventional
  • Study Design
    • Allocation: N/A
    • Intervention Model: Single Group Assignment
    • Primary Purpose: Treatment
    • Masking: None (Open Label)
  • Study Primary Completion Date: June 2016

Detailed Description

The standard treatment for chronic myelogenous leukemia is therapy with tyrosine kinase inhibitors (TKIs). This treatment can diminish the amount of disease to very low levels that only very sensitive and specialized techniques can measure; it does not, however, provide a cure. Dr. Shaoguang Li and colleagues at University of Massachusetts have published a unique discovery that the arachidonate 5-lipoxygenase (5-LO) gene (Alox5) is a critical regulator for LSCs in BCR-ABL-induced CML (Chen Y et al. Loss of the Alox5 gene impairs leukemia stem cells and prevents chronic myeloid leukemia. Nature Genetics 41:783-792, 2009). In the absence of Alox5, BCR-ABL failed to induce CML in preclinical studies. While deficiency in Alox5 had no effect on normal hematopoiesis, impairment of the LSCs function through differentiation and cell division of CML LSCs was observed. This defect led to a depletion of LSCs and a failure of CML development. Treatment with a 5-LO inhibitor (zileuton) also impaired the function of LSCs and prolonged survival. These results demonstrate that a specific target gene can be found in cancer stem cells and its inhibition can completely inhibit the function of these stem cells. These findings provide an exciting opportunity to develop the first anti-cancer stem cell therapy for treating CML. Patients who did not respond or did not tolerate two TKIs will be considered for this study.

Interventions

  • Drug: Zileuton (Zyflo®) Dasatinib (Sprycel®)
    • To determine the maximum dose of zileuton/dasatinib in subjects with CML
  • Drug: Dosing with Zileuton/Dasatinib in CML
    • Three dose levels of daily zileuton will be studied in conjunction with dasatinib to define the MTD
  • Drug: Daily dosing of Zileuton/Dasatinib
    • Three dose levels of daily zileuton will be studied in conjunction with dasatinib to define the MTD
  • Drug: Daily dosing with Zileuton/Dasatinib for CML
    • Three dose levels of daily zileuton will be studied in conjunction with dasatinib to define the MTD

Arms, Groups and Cohorts

  • Experimental: Zileuton/Dasatinib
    • zileuton/dasatinib: This is a traditional phase I design. Three dose levels of daily zileuton will be studied in conjunction with dasatinib to define the MTD

Clinical Trial Outcome Measures

Primary Measures

  • To determine the maximal tolerated dose (MTD) of zileuton when added to dasatinib in patients with CML
    • Time Frame: 36 mos

Secondary Measures

  • To assess the efficacy of zileuton combined with dasatinib in terms of:
    • Time Frame: 36 mos
    • 5-lipoxygenase (5-LO) blockade in patients The rate of hematological response (where applicable) The rate of complete cytogenetic response (where applicable) The rate of major molecular response (where applicable) Assessment of residual CML stem cells

Participating in This Clinical Trial

Inclusion Criteria

Target Population: 1. Patients with CML with known inadequate response (as appropriate for their CML status) to TKIs or known resistance will be considered for this study

  • Patients who are resistant or not responding adequately to dasatinib as a first line therapy, but are not able or eligible to receive other effective second line treatment can be considered for participation in the study. – Age > 18 years – ECOG performance status ≤ 2 – Total bilirubin < 2.0 times the institutional Upper Limit of Normal (ULN) – Hepatic enzymes (AST, ALT ) ≤ 1.5 times the institutional ULN – Serum Na, K+, Mg2+, Phosphate and Ca2+>= Lower Limit of Normal (LLN) – Serum Creatinine < 2.3 mg/dL – PT, PTT all Grade 0-1 3) Ability to take oral medication 4) Concomitant Medications – Patient agrees to discontinue St. Johns Wort while receiving dasatinib therapy 5) Age and Sex – Women of childbearing potential and men of fathering potential must use an adequate method of contraception to avoid pregnancy throughout the study to minimize the risk of pregnancy Exclusion Criteria:

1. Sex and Reproductive Status

  • Women of childbearing potential and men of fathering potential unable or unwilling to use an adequate method of contraception to avoid pregnancy throughout the study to minimize the risk of pregnancy 2. Target Population – Patients intolerant of dasatinib. 3. Medical History and Concurrent Diseases – History of active malignancy during the past 5 years with the exception of nonmetastatic treated skin cancer (e.g. basal or squamous cell carcinoma ) or stage 0 cervical carcinoma – Patients known to be HIV-positive – Patients with active, uncontrolled infections – Concurrent medical condition which may increase the risk of toxicity, including: – Pleural or pericardial effusion of any grade – Cardiac Conditions: – Uncontrolled angina, congestive heart failure or MI within (6 months) – Diagnosed congenital long QT syndrome – Any history of clinically significant ventricular arrhythmias (such as ventricular tachycardia, ventricular fibrillation, or Torsades de pointes) – Prolonged QTc interval on pre-entry electrocardiogram (> 450 msec) – Severe cardiac dysfunction (NYHA classification III-IV) – Severe pulmonary disease – History of significant bleeding disorder unrelated to cancer 4. Physical and Laboratory Test Findings – Hepatic dysfunction (serum bilirubin ≥ 2 x ULN, and/or ALT ≥ 3 x ULN, and/or AST ≥ 3 x ULN) – Renal dysfunction (creatinine ≥ 200 μmol/l or 2.3 mg/dl) – Subjects with hypokalemia or hypomagnesemia that cannot be corrected prior to dasatinib administration 5. Allergies and Adverse Drug Reactions – Patients with known allergic reaction or intolerance to either dasatinib or zileuton 6. Prohibited Treatments and/or Therapies – Category I drugs that are generally accepted to have a risk of causing Torsades de Pointes including: – quinidine, procainamide, disopyramide – amiodarone, sotalol, ibutilide, dofetilide – erythromycin, clarithromycin – chlorpromazine, haloperidol, mesoridazine, thioridazine, pimozide – cisapride, bepridil, droperidol, methadone, arsenic, chloroquine, domperidone, halofantrine, levomethadyl, pentamidine, sparfloxacin, lidoflazine. – Patients requiring anticoagulation with Coumadin 7. Other Exclusion Criteria – Prisoners or subjects who are involuntarily incarcerated. – Subjects who are compulsorily detained for treatment of either a psychiatric or physical (e.g. infectious disease) illness.

Gender Eligibility: All

Minimum Age: 18 Years

Maximum Age: 70 Years

Are Healthy Volunteers Accepted: No

Investigator Details

  • Lead Sponsor
    • University of Massachusetts, Worcester
  • Collaborator
    • Bristol-Myers Squibb
  • Provider of Information About this Clinical Study
    • Principal Investigator: Jan Cerny, MD, PhD, Assistant Professor, Medicine – University of Massachusetts, Worcester
  • Overall Official(s)
    • Jan Cerny, MD, PhD, Principal Investigator, University of Massachusetts, Worcester

References

Chen Y, Hu Y, Zhang H, Peng C, Li S. Loss of the Alox5 gene impairs leukemia stem cells and prevents chronic myeloid leukemia. Nat Genet. 2009 Jul;41(7):783-92. doi: 10.1038/ng.389. Epub 2009 Jun 7.

Shah NP, Kantarjian HM, Kim DW, Réa D, Dorlhiac-Llacer PE, Milone JH, Vela-Ojeda J, Silver RT, Khoury HJ, Charbonnier A, Khoroshko N, Paquette RL, Deininger M, Collins RH, Otero I, Hughes T, Bleickardt E, Strauss L, Francis S, Hochhaus A. Intermittent target inhibition with dasatinib 100 mg once daily preserves efficacy and improves tolerability in imatinib-resistant and -intolerant chronic-phase chronic myeloid leukemia. J Clin Oncol. 2008 Jul 1;26(19):3204-12. doi: 10.1200/JCO.2007.14.9260. Epub 2008 Jun 9.

Daley GQ, Van Etten RA, Baltimore D. Induction of chronic myelogenous leukemia in mice by the P210bcr/abl gene of the Philadelphia chromosome. Science. 1990 Feb 16;247(4944):824-30.

Clinical trials entries are delivered from the US National Institutes of Health and are not reviewed separately by this site. Please see the identifier information above for retrieving further details from the government database.

At TrialBulletin.com, we keep tabs on over 200,000 clinical trials in the US and abroad, using medical data supplied directly by the US National Institutes of Health. Please see the About and Contact page for details.