A Study of Pevonedistat in Adult East Asian Participants

Millennium Pharmaceuticals, Inc.23 enrolled

Overview

The purpose of this study is to evaluate the safety and tolerability of pevonedistat administered as a single agent and in combination with azacitidine in adult east Asian participants with acute myeloid leukemia (AML) or myelodysplastic syndromes (MDS).

The drug being tested in this study is called Pevonedistat. Pevonedistat is being tested to treat people with myelodysplastic syndromes MDS (including nonproliferative chronic myelomonocytic leukemia \[CMML\]) and AML (acute myeloid leukaemia) as a single-agent and in combination treatment with azacitidine. This study will look at the safety and tolerability, the recommended phase 2/phase 3 dose of pevonedistat administered in combination with azacitidine, pharmacokinetics and response to treatment in participants who take single agent pevonedistat compared to participants who take pevonedistat and azacitidine. The study will enroll approximately 37 participants. Participants will be assigned into one of the four treatment groups which will remain disclosed to the patient and study doctor during the study. Participants will be first enrolled at single-agent low dose level (25 mg/m\^2). If this dose is tolerable, participants will be enrolled in parallel at single-agent higher dose level (44 mg/m\^2) and in combination treatment cohorts. * Pevonedistat 25 mg/m\^2 * Pevonedistat 44 mg/m\^2 * Pevonedistat 10 mg/m\^2 and azacitidine 75 mg/m\^2 combination * Pevonedistat 20 mg/m\^2 and azacitidine 75 mg/m\^2 combination Participants will receive pevonedistat infusion intravenously and azacitidine via intravenous or subcutaneous route. This multi-center trial will be conducted in Japan, Korea and Taiwan. The overall time to participate in this study is approximately 24 months. Participants will attend the End of Study (EOS) visit for safety, 30 days after receiving their last dose of study drug or before the start of subsequent antineoplastic therapy (other than hydroxyurea).

Study Type

INTERVENTIONAL

Allocation

NON_RANDOMIZED

Purpose

TREATMENT

Masking

NONE

Enrollment

Conditions

Leukemia, Myeloid, Acute Myelodysplastic Syndromes

Interventions

Pevonedistat 25 mg/m^2DRUG

Pevonedistat 25 mg/m\^2 intravenous infusion.

Pevonedistat 44 mg/m^2DRUG

Pevonedistat 44 mg/m\^2 intravenous infusion.

Pevonedistat 10 mg/m^2DRUG

Pevonedistat 10 mg/m\^2 intravenous infusion.

Eligibility

Sex: ALLMin age: 18 Years

Medical Language ↔ Plain English

Inclusion Criteria include, in part: 1. East Asian patients aged 18 years or older (or minimum age of legal consent consistent with local regulations) when written study informed consent is obtained must meet 1 of the following diagnosis criteria for either the Single-Agent Arm or the Combination Arm (additional restrictions apply to the Single Agent Arm): a. Are male and female participants with WHO-defined AML, including leukemia secondary to prior chemotherapy or resulting from an antecedent hematologic disorder, who have failed to achieve CR or who have relapsed after prior therapy (R/R) and are not candidates for potentially curative treatment, or ii. Are male and female participants aged 60 years or older with previously untreated AML who have bone marrow blasts \<30% and who are not candidates for standard induction chemotherapy, or iii. Are male and female participants with WHO-defined MDS that meets the IPSS-R criteria for the very high, high, or intermediate risk group, for whom standard curative, life-prolonging treatment does not exist or is no longer effective (R/R), or iv. Are male and female participants with previously untreated MDS that meets the IPSS-R criteria for the very high, high, or intermediate risk group, or vi. Are male and female participants with WHO-defined CMML-2 or CMML-1 that meets the IPSS-R criteria for the very high, high, or intermediate risk group CMML-1 participants must have bone marrow blasts \>=5% 2. Has Eastern Cooperative Oncology Group (ECOG) performance status of 0 to 1. 3. Able to undergo bone marrow aspiration and biopsy at Screening. Exclusion Criteria include, in part: 1. Acute promyelocytic leukemia (as diagnosed by morphologic examination of bone marrow, by fluorescent in situ hybridization or cytogenetics \[t (15:17)\] of peripheral blood or bone marrow, or by other accepted analysis) or AML associated with t (9;22) karyotypes or molecular. 2. More than 3 prior lines of therapy (Combination Arm only). 3. Prior therapy with hypomethylating agents (example, azacitidine, decitabine). (Combination Arm only). 4. Is eligible for a hematopoietic stem cell transplant. 5. Is a female participant who is lactating and breastfeeding or who have a positive serum pregnancy test during the screening period or a positive urine pregnancy test on Day 1 before first dose of study drug. 6. Had treatment with any investigational products within 14 days before the first dose of any study drug. 7. Has known hypersensitivity to azacitidine or mannitol (Combination Arm only). 8. Has known central nervous system involvement. 9. Had systemic antineoplastic therapy or radiotherapy within 14 days before the first dose of any study drug, except for hydroxyurea.

Locations (9)

Unnamed facility

Maebashi, Japan

Unnamed facility

Nagoya, Japan

Unnamed facility

Sendai, Japan

Unnamed facility

Tokyo, Japan

Outcomes

Primary Outcomes

Number of Participants Reporting One or More Treatment-emergent Adverse Events (TEAEs) and Serious Adverse Events (SAEs)

Time frame: From first dose through 30 days after the last dose of study drug: single agent arms (up to Cycle 19 [up to Day 429]) (Cycle=21 days); combination arms (up to Cycle 65 [up to Day 1850]) (Cycle=28 days)

Number of Participants With Dose Limiting Toxicities (DLTs) Based on National Cancer Institute Common Terminology Criteria for Adverse Events (NCI CTCAE) Version 4.03 During Cycle 1

DLT: Any of following events considered possibly related to study drug(s) by investigator: Grade (G) 3 or greater nausea and/or emesis despite use of optimal antiemetic prophylaxis; G3 diarrhea occurred despite maximal supportive therapy; G3 arthralgia/myalgia despite use of optimal analgesia; G3 nonhematologic toxicity with exceptions: 1) Brief fatigue, 2) hypophosphatemia; Persistent elevations of transaminases/bilirubin above G2 beyond 2 days between doses; Other study drug-related nonhematologic toxicities G2 or greater, required a dose reduction/discontinuation of pevonedistat. G3 or greater hematologic toxicities, including G3 or 4 febrile neutropenia, considered DLTs if: A delay in initiation of Cycle 2 due to lack of adequate recovery from treatment-related toxicity: 1) Of more than (\>) 4 weeks due to hematologic toxicity believed not related to leukemic infiltration. Bone marrow (BM) evaluation may have been required. 2) Of \>2 weeks due to nonhematologic toxicities.

Time frame: Cycle 1 (Cycle length = 21 days [single agent arms]; 28 days [combination arms])

Number of Participants With Clinically Significant Abnormal Laboratory Values

Time frame: Baseline up to Cycle 19 (up to Day 399) in single agent arms (Cycle=21days) and Cycle 65 (up to Day 1820) in combination arms (Cycle=28 days)

Cmax: Maximum Observed Plasma Concentration for Pevonedistat When Administered Alone and in Combination With Azacitidine on Cycle 1 Day 1

Time frame: Cycle 1 Day 1: pre-infusion and at multiple time points (up to 48 hours) post-infusion (Cycle length = 21 days [single agent arms]; 28 days [combination arms])

Data from ClinicalTrials.gov

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Secondary Outcomes

Overall Response Rate (ORR) for Participants With AML

ORR for AML was defined as the percentage of participants with a complete remission (CR), CR with incomplete blood count recovery (CRi), or partial remission (PR) based on Modified International Working Group (IWG) Response Criteria for AML. CR was defined as participant achieved the morphologic leukemia-free state and had an absolute neutrophil count (ANC) of more than 1,000 per microliter (/mcL) and platelets of greater than or equal to (\>=) 100,000/mcL. A morphologic leukemia-free state requires less than (\<) 5 percent (%) blasts in an aspirate sample with marrow spicules and with a count of at least 200 nucleated cells. CRi was, after chemotherapy, some participants who fulfilled all of the criteria for CR except for residual neutropenia (\<1,000/mcL) or thrombocytopenia (\<100,000/mcL). PR designation required all the hematologic values for a CR but with a decrease of at least 50% in the percentage of blasts to between 5% and 25% in the bone marrow aspirate.

Time frame: From first dose up to 30 days after last dose of study drug or before start of subsequent antineoplastic therapy, whichever comes earlier up to Cycle 19 (up to Day 429, single agent)(Cycle=21 days) and Cycle 65 (up to Day 1850, combination)(Cycle=28 days)

ORR for Participants With MDS

ORR for MDS: Percentage of participants with CR,PR or hematologic improvement(HI) based on IWG Response Criteria. CR: BM:\<=5% myeloblasts with normal maturation of all cell lines; persistent dysplasia noted peripheral blood: hemoglobin (Hgb)\>=11 gram per deciliter (g/dL),platelets\>=100\*10\^9/L,neutrophils \>=1.0\*10\^9/L, blasts 0%. PR:CR criteria if abnormal before treatment except: BM blasts decreased by \>=50% from pretreatment but still\>5%; cellularity, morphology not relevant. HI criteria: Erythroid response:Hgb up by \>=1.5 g/dL; transfused RBC reduced by at least 4 red blood cell (RBC) transfusions/8 weeks comparatively last 8 weeks; Platelet response: Increase of \>=30\*10\^9/L for participants starting with \>20\*10\^9/L platelets; increase from \<20\*10\^9/L to \>20\*10\^9/L and by 100%; Neutrophil response: At least 100% and absolute increase \>0.5\*10\^9/L; Progression/relapse after HI: Granulocytes/platelets decreased by 50% from maximum; Hgb reduced by \>=1.5 g/dL; transfusion dependence.

Percentage of Participants With CR for Participants With AML

CR was defined as participant achieved the morphologic leukemia-free state and had an ANC of more than 1,000/mcL and platelets of \>=100,000/mcL. A morphologic leukemia-free state requires \<5% blasts in an aspirate sample with marrow spicules and with a count of at least 200 nucleated cells. CR assessment was based on IWG Response Criteria.

Percentage of Participants With CR for Participants With MDS

CR was defined as participant with bone marrow: less than or equal to (\<=) 5% myeloblasts with normal maturation of all cell lines; persistent dysplasia was noted peripheral blood: Hgb \>=11 g/dL, platelets \>=100\*10\^9/L, neutrophils \>=1.0\*10\^9 per liter (/L), blasts 0%. CR assessment was based on IWG Response Criteria.