A Study of Siremadlin in Combination With Venetoclax Plus Azacitidine in Adult Participants With Acute Myeloid Leukemia (AML) Who Are Ineligible for Chemotherapy.
- Conditions
- Acute Myeloid Leukemia
- Interventions
- Registration Number
- NCT05155709
- Lead Sponsor
- Novartis Pharmaceuticals
- Brief Summary
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 patients without unacceptable levels of treatment-emergent toxicities.
- Detailed Description
The recommended dose of siremadlin in combination with venetoclax plus azacitidine will be determined to be explored further in the expansion phase and the preliminary efficacy in achieving Complete Remission (CR) will be 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) is administered in cycles with a planned duration of 28 days and will continue until the participants experience 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 is 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) 27 sites were open for recruitment with 28 patients screened and 14 patients enrolled.
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) will not be open. The Novartis decision was not driven by any safety concerns.
Recruitment & Eligibility
- Status
- TERMINATED
- Sex
- All
- Target Recruitment
- 14
- 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).
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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%.
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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
- 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.
Other protocol-defined inclusion/exclusion criteria may apply at the end
Study & Design
- Study Type
- INTERVENTIONAL
- Study Design
- SINGLE_GROUP
- Arm && Interventions
Group Intervention Description Arm 1: Unfit adult participants with AML who responded sub-optimally to standard of care siremadlin Unfit adult participants with AML who responded sub-optimally to at least 2 and not more than 4 cycles ( 1 cycle=28 days) of first-line venetoclax plus azacitidine therapy Arm 1: Unfit adult participants with AML who responded sub-optimally to standard of care venetoclax Unfit adult participants with AML who responded sub-optimally to at least 2 and not more than 4 cycles ( 1 cycle=28 days) of first-line venetoclax plus azacitidine therapy Arm 1: Unfit adult participants with AML who responded sub-optimally to standard of care azacitidine Unfit adult participants with AML who responded sub-optimally to at least 2 and not more than 4 cycles ( 1 cycle=28 days) of first-line venetoclax plus azacitidine therapy Arm 2: Newly diagnosed unfit adult participants with high-risk AML venetoclax Unfit adult participants with newly diagnosed AML and with adverse genetic risk stratification (according to ELN 2022)(Except TP53 mutation positive participants). Arm 2: Newly diagnosed unfit adult participants with high-risk AML azacitidine Unfit adult participants with newly diagnosed AML and with adverse genetic risk stratification (according to ELN 2022)(Except TP53 mutation positive participants). Arm 2: Newly diagnosed unfit adult participants with high-risk AML siremadlin Unfit adult participants with newly diagnosed AML and with adverse genetic risk stratification (according to ELN 2022)(Except TP53 mutation positive participants).
- Primary Outcome Measures
Name Time Method Percentage of participants treated at the recommended dose for expansion, achieving a complete remission (CR) as per investigator assessment (Arm 1 only) At least 7 cycles (196 days) The objective is to evaluate preliminary efficacy of siremadlin at the determined recommended dose for expansion (RDE) when administered in combination with venetoclax and azacitidine.
This endpoint will not be analyzed since the recommended dose was not determined due to early termination.Percentage of participants with Dose Limiting Toxicities (DLTs) as per investigator assessment reported during the first cycle (separately in Arm 1 & Arm 2) From Cycle 1 Day 1 to Cycle 1 Day 28 (28 days) The objective for the safety run-in is to determine the recommended dose of siremadlin in combination with venetoclax plus azacitidine to be explored further in the expansion part separately in Arm 1 and Arm 2.
- Secondary Outcome Measures
Name Time Method Time of the 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) up to 3 years Assessment of duration of CR in participants who achieved a CR.
This endpoint will not be analyzed since the recommended dose was not determined due to early termination.PK parameter: Cmax of siremadlin, venetoclax and azacitidine (Arm 1 and Arm 2) up to 3 years To characterize the PK of siremadlin, venetoclax and azacitidine administered in combination in each arm. Cmax is the maximum (peak) observed plasma, blood, serum or other body fluid drug concentration following drug administration (mass x volume -1)
Percentage of participants achieving CR or complete remission with partial hematological recovery (CRh) and percentage of participants achieving CR or complete remission with incomplete hematological recovery (CRi) (Arm 1 and Arm 2) up to 3 years Assessment of CR/CRh rate and CR/CRi rate.
The time from start of treatment to death due to any cause (Arm 1 and Arm 2 separately) up to 3 years Assessment of Overall Survival (OS).
This endpoint will not be analyzed since the recommended dose was not determined due to early termination.PK parameter: Tmax of siremadlin, venetoclax and azacitidine (Arm 1 and Arm 2) up to 3 years PK parameter Tmax and concentration vs time profiles of siremadlin, venetoclax and azacitidine. Tmax is the time to reach maximum (peak) plasma, blood, serum, or other body fluid drug concentration after drug administration (time).
Percentage of participants treated at the recommended dose for expansion, achieving CR as per investigator assessment (Arm 2 only; for Arm 1 assessment of CR is a primary outcome measure)) up to 3 years Assessment of CR in order to evaluate preliminary efficacy of siremadlin (in combination of venetoclax plus azacitidine) at the determined recommended dose for Arm 2 participants.
This endpoint will not be analyzed since the recommended dose was not determined due to early termination.Pharmacokinetic (PK) parameters: AUCs of siremadlin, venetoclax and azacitidine (Arm 1 and Arm 2) up to 3 years AUC0-t: The area under the concentration vs. time Curve (AUC) from time zero to specified time point.
AUClast is the AUC from time zero to the last quantifiable concentration point (last) (mass x time x volume -1).
AUCtau is the AUC to the end of the dosing interval as when possible PK samples will be collected up to 24 h postdose for siremadlin and venetoclax. Steady-state will be assumed on Day 5 (AUCtau, ss) in case of continuous dosing.Percentage of participants died due to any cause from start of treatment until 30- and 60-day (Arm 1 and Arm 2) 30 days & 60 days from start of study treatment To assess rate of early mortality at 30 day and 60 days from start of study treatment
Time from the date of the first documented CR/CRh and CR/CRi to the date of first documented relapse or death due to any cause, whichever occurs first (Arm 1 and Arm 2 separately) up to 3 years Assessment of duration of CR/CRh and duration of CR/CRi.
This endpoint will not be analyzed since the recommended dose was not determined due to early termination.Percentage of CR- Measurable Residual Disease (MRD) negative overall and in participants achieving a CR, CR/CRh, and CR/CRi (Arm 1 and Arm 2) up to 3 years To assess the effect of siremadlin in combination with venetoclax plus azacitidine in MRD
Trial Locations
- Locations (3)
Oregon Health Sciences University
🇺🇸Portland, Oregon, United States
Texas Oncology Sammons Cancer Center
🇺🇸Dallas, Texas, United States
Novartis Investigative Site
Izmir, Turkey (Türkiye)
Oregon Health Sciences University🇺🇸Portland, Oregon, United States