A Study of the Histone-deacetylase Inhibitor JNJ-26481585 in Patients With Advanced or Refractory Leukemia or Myelodysplastic Syndrome

A Study of the Histone-deacetylase Inhibitor JNJ-26481585 in Patients With Advanced or Refractory Leukemia or Myelodysplastic Syndrome

A Phase 1 Study of the Histone-deacetylase Inhibitor JNJ-26481585 in Subjects With Advanced or Refractory Leukemia or Myelodysplastic Syndrome

The purpose of this study is to explore the safety, pharmacokinetic (what the body does to the medication), pharmacodynamic (what the medication does to the body), and activity of JNJ-26481585 in patients with advanced or refractory leukemia and myelodysplastic syndrome (MDS).

This is an open-label (all people know the identity of the intervention), Phase 1 dose escalation, 2-part study (Part I and Part II). In Part I of the study, the Maximum Tolerated Dose (MTD) defined as the highest dose with an observed incidence of dose limiting toxicity (DLT) in no more than 1 in 6 patients, will be determined using rapid escalation (Stage 1) followed by conventional escalation (Stage 2). In Stage 1, at least 2 patients will be enrolled at each dose level; dose increments of 100% will be applied. In Stage 2, at least 3 patients will be enrolled at each dose level and dose increments of 20-50% will be implemented. Decisions on dose escalation or de-escalation, changes in the timing of pharmacokinetic/pharmacodynamic sampling, and the exploration of an alternative schedule were to be made by the Study Evaluation Team (SET), which consisted of all principal investigators, the medical monitor, and 1 of the sponsor's clinical pharmacologists. Part II of the study will be the expansion phase, which will begin after the MTD had been determined in Part I and an additional cohort of patients with MDS will be enrolled to further explore the safety and activity of JNJ 26481585 in patients with MDS. The starting dose for patients enrolled in Part II of the study was to be the MTD established in Part I. Depending on the outcome, the SET may decide to continue at the MTD dose, or dose-de-escalate to the next lower level (25 50% decrement from MTD). The cohort for MDS will be expanded to consist of 16 evaluable patients. Safety will be evaluated throughout the study and will include evaluations of adverse events clinical laboratory tests, electrocardiogram (ECG), vital signs, 24 hours Holter ECG, physical examination, Eastern Cooperative Oncology Group performance status and Multiple Gated Acquisition scan or echocardiography.

Advanced or Refractory Leukemia, Myelodysplastic Syndromes, JNJ 26481585, Histone-Deacetylase Inhibitor, Advanced Leukemia, Refractory Leukemia

In Part 1, Initial dose of JNJ-26481585 4 mg oral capsule is administered once daily on each day of a 21-day cycle. Dose will be escalated or de-escalated until Maximum tolerated dose (MTD) of JNJ-26481585 is determined in Part 1. MTD of JNJ-26481585 will be the initial dose in Part 2.

From the date of dosing upto 3 months after the date the last patient enrolled in Part I of the study, received the first dose of study medication

The MTD is defined as the highest dose with an observed incidence of DLT in no more than 1 in 6 patients.

From the date of dosing upto 3 months after the date the last patient enrolled in Part I of the study, received the first dose of study medication

Pre-treatment (within 4 weeks prior to first dose of JNJ-26481585); Days 1, 3, 8, 15 and 21 of Cycle 1; Days 8, 15 and 21 of Cycle 2; Day 21 of Cycle 3 to 20; follow up (within 14 days after last dose of JNJ-26481585)

Inclusion Criteria: Histologically or cytologically confirmed advanced or refractory acute myeloid leukemia, acute lymphocytic leukemia, chronic myeloid leukemia in blast phase, refractory chronic lymphocytic leukemia, myelodysplastic syndrome, or chronic myelomonocytic leukemia For Part II, patients with myelodysplastic syndrome Eastern Cooperative Oncology Group Performance Status Score 0, 1 or 2 Left Ventricular Ejection Fraction greater than or equal to 50% Negative hepatitis B, C and human immunodeficiency virus (HIV) test within last 3 months Adequate liver and kidney function Exclusion Criteria: Known or suspected involvement of the central nervous system Chemotherapy (nitrosoureas and mitomycin C within 6 weeks), radiotherapy, immunotherapy or treatment with investigative agent within 3 weeks before study drug administration (except hydroxyurea which should be stopped at least 24 hours prior to first dose) Unstable angina or myocardial infarction within the preceding 12 months; congestive heart failure Poorly controlled hypertension or diabetes, ongoing active infection and psychiatric illness Receiving medications known to have a risk of causing QTc prolongation

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A Phase 1 Study of the Histone-Deacetylase Inhibitor JNJ-26481585 in Subjects with Advanced or Refractory Leukemia or Myelodysplastic Syndrome