A Study of Siremadlin in Combination With Venetoclax Plus Azacitidine in Adult Participants With Acute Myeloid Leukemia (AML) Who Are Ineligible for Chemotherapy.

Novartis Pharmaceuticals14 enrolled

Overview

A study of siremadlin in combination with venetoclax plus azacitidine in adult participants with AML who are ineligible for chemotherapy. The primary purpose of this study was to assess whether siremadlin in combination with venetoclax plus azacitidine can enhance the clinical response in unfit AML participants without unacceptable levels of treatment-emergent toxicities.

The recommended dose of siremadlin in combination with venetoclax plus azacitidine was to be determined to be explored further in the expansion phase and the preliminary efficacy in achieving Complete Remission (CR) evaluated in participants who responded sub-optimally to first-line venetoclax plus azacitidine treatment. The study was planned to be conducted in two parts. The primary purpose of Part 1 (Safety Run- in) was to rule out excessive toxicity of siremadlin when administered in combination with venetoclax plus azacitidine while the primary purpose of Part 2 (Expansion) was to evaluate the preliminary efficacy of siremadlin when combined with venetoclax plus azacitidine in the respective patient population. The study treatment (siremadlin in combination with venetoclax plus azacitidine) was administered in cycles with a planned duration of 28 days for each cycle and would continue until the participants experienced disease progression/relapse or unacceptable toxicity. The initial enrollment plan and safety review was as follow: * In the Safety run-in part, 9-15 participants were planned to be enrolled in each arm. Approximately 3-6 participants were planned to be enrolled at the starting dose level of siremadlin in combination with venetoclax plus azacitidine in both arms independently. Provided the starting dose level was determined to be safe, approximately 6-9 additional participants were planned to be enrolled at dose level +1. Safety review meetings were planned to take place involving participating investigators and the Sponsor Team to make decisions regarding siremadlin dose and determine the recommended dose for expansion. * Approximately 26 patients were planned to be treated at the recommended dose in the expansion part. In the safety run-(Part 1) 10 sites in 7 countries enrolled 14 patients. After enrolling 14 patients (6 patients in Arm 1 and 8 patients in Arm 2), Novartis took the decision to put the enrollment in permanent halt and terminate the siremadlin program. For that reason, the enrollment in Part 2 (expansion phase) did not open. The Novartis decision was not driven by any safety concerns.

Study Type

INTERVENTIONAL

Allocation

Conditions

Acute Myeloid Leukemia

Interventions

siremadlinDRUG

Siremadlin is a capsule taken orally once a day (QD) and comes in 10 mg, 20 mg and 30 mg strengths

venetoclaxDRUG

Venetoclax is a tablet taken orally once a day (QD) and comes in 10 mg, 50 mg and 100 mg strengths.

azacitidineDRUG

Azacitidine is a powder for suspension for injection or powder for solution for infusion taken intravenously or subcutaneously comes in 100 mg but was administered according to standard local clinical practice.

Eligibility

Sex: ALLMin age: 18 YearsMax age: 99 Years

Medical Language ↔ Plain English

Inclusion Criteria: * Age at the date of signing the informed consent form (ICF): * Arm 1 and Arm 2: ≥ 18 years * Participants diagnosed with AML based on WHO 2016 classification (Arber et al 2016) who are ineligible for standard induction chemotherapy and: * Arm 1 : have received at least 2 cycles and not more than 4 cycles of first-line venetoclax plus azacitidine treatment and have not achieved a CR, CRi, CRh or MLFS. * Arm 2 : newly diagnosed AML with adverse genetic risk stratification (according to ELN 2022) (except TP53 mutation positive participants). * Participant (in both arms) must be considered ineligible for standard of care intensive induction chemotherapy defined by the following: * 75 years of age; OR * 18 to 74 years of age with at least one of the following co-morbidities: Eastern Cooperative Oncology Group (ECOG) Performance Status of 2 or 3; Cardiac history of congestive heart failure (CHF) requiring treatment or Ejection Fraction ≤ 50% or chronic stable angina; DLCO ≤ 65% or FEV1 ≤ 65%. * Participants must have an ECOG performance status: 0 to 2 for participants ≥ 75 years of age. OR 0 to 3 for participants ≥ 18 to 74 years of age. * WBC \< 25x109/L * AST and ALT ≤ 3 × ULN * Estimated Glomerular Filtration Rate (eGFR)≥ 60 mL/min/1.73 m2 Exclusion Criteria: * Prior exposure to MDM2-inhibitor therapy at any time. * Participants with TP53 mutation positive. * Participants with del17p. * Participants with AML-M3 / APL (Acute promyelocytic leukemia) with PML-RARA (Promyelocytic leukemia/retinoic acid receptor alpha) or with AML secondary to Down's syndrome. * Participants treated with FLT3 inhibitors for AML indication are not eligible. * Participants who require treatment with moderate or strong CYP3A4 inducers within 14 days prior to starting study treatment, or are expected to receive moderate or strong CYP3A4 inducers during the entire study * Participants who require treatment with substrates of CYP3A4/5 with a narrow therapeutic index.

Locations (10)

Oregon Health Sciences University

Portland, Oregon, United States

Texas Oncology Sammons Cancer Center

Dallas, Texas, United States

Novartis Investigative Site

Hong Kong, Hong Kong

Novartis Investigative Site

Outcomes

Primary Outcomes

Percentage of participants with Dose Limiting Toxicities (DLTs) as per investigator assessment reported during the first cycle (separately in Arm 1 & Arm 2)

A dose-limiting toxicity (DLT) is defined as an adverse event (AE) or abnormal laboratory value considered by the Investigator to be at least possibly related to siremadlin as a single contributor or in combination with other component(s) of study treatment that occurs beginning the first day of siremadlin dosing in the study until end of cycle 1.

Time frame: From Cycle 1 Day 1 to Cycle 1 Day 28 (28 days)

Percentage of participants achieving a complete remission (CR) rate at recommended dose for expansion (RDE) as per investigator assessment (Arm 1 only)

Assessed by CR rate. CR rate is defined as the percentage of participants with best overall response of complete remission (CR) as per investigator assessment.

Time frame: At least 7 cycles (196 days)

Secondary Outcomes

Percentage of participants achieving complete remission (CR) as per Investigator assessment (Arm 2 only)

Assessed by CR rate. CR rate is defined as the percentage of participants with best overall response of complete remission (CR) as per investigator assessment.

Time frame: up to 3 years

Time from date of the first documented CR to the date of the first documented relapse or death due to any cause, whichever occurs first (Arm 1 and Arm 2 separately)

Duration of CR is defined as time from the date of the first documented CR to the date of first documented relapse or death due to any cause, whichever occurs first. Assessment of duration of CR in participants who achieved a CR. This endpoint was not analyzed since the recommended dose was not determined due to early termination.

Time frame: up to 3 years

Percentage of participants achieving CR or complete remission with partial hematological recovery (CRh) (Arm 1 & 2)

Data from ClinicalTrials.gov

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