Efficacy of Oral Azacitidine Plus Best Supportive Care as Maintenance Therapy in Subjects With Acute Myeloid Leukemia (AML) in Complete Remission

This study enrolled 472 participants, aged 55 or older, with a diagnosis of de novo acute myeloid leukemia (AML) or AML secondary to prior myelodysplastic disease or chronic myelomonocytic leukemia (CMML), and who have achieved first complete remission (CR)/ complete remission with incomplete blood count recovery (CRi) following induction with or without consolidation chemotherapy. The study is amended to include an extension phase (EP). The EP allows participants who are currently receiving oral azacitidine and who are demonstrating clinical benefit as assessed by the investigator, to continue receiving oral azacitidine after unblinding by sponsor until the participant meets the criteria for study discontinuation or until oral azacitidine becomes commercially available and reimbursed. In addition, all participants in the placebo arm and participants who had been discontinued from the treatment phase (irrespective of randomization arm) and continuing in the follow-up phase will be followed for survival in the EP.

Sex

All

Minimum age

55 Years

Key Inclusion Criteria:

1. Male or female participants ≥ 55 years of age
2. Newly diagnosed, histologically confirmed de novo acute myeloid leukemia (AML) or AML secondary to prior myelodysplastic disease or CMML (Chronic myelomonocytic leukemia)
3. First complete remission (CR)/ complete remission with incomplete blood count recovery (CRi) with induction therapy with intensive chemotherapy with or without consolidation therapy within 4 months (+/- 7 days of achieving CR or CRi)
4. Eastern Cooperative Oncology Group (ECOG) performance status - 0, 1, 2, 3

Key Inclusion Criteria in the Extended Phase of the study:

At the Investigator's discretion and with approval of the sponsor, participants meeting all of the following eligibility criteria are eligible to enter the extension phase:

1. All participants randomized into the oral azacitidine or placebo arm and are continuing in either the treatment phase or follow-up phase of the CC-486-AML-001 study;

   * Participants randomized to oral azacitidine treatment arm and continuing in the treatment phase demonstrating clinical benefit as assessed by the investigator are eligible to receive oral azacitidine in the extension phase (EP);
   * Participants randomized into placebo arm of the study will not receive oral azacitidine in the EP, but will be followed for survival in the EP;
   * Participants currently in the follow-up phase will continue to be followed for survival in the EP;
2. Participants who have signed the informed consent for the EP of the study;
3. Participants who do not meet any of the criteria for study discontinuation

Key Exclusion Criteria:

1. AML with inversion (inv)(16), translocation = t(8;21), t(16;16), t(15;17), or t(9;22) or molecular evidence of such translocations
2. Prior bone marrow or stem cell transplantation
3. Have achieved CR/CRi following therapy with hypomethylating agents
4. Diagnosis of malignant disease within the previous 12 months
5. Proven central nervous system (CNS) leukemia

• BACKGROUNDRoboz GJ, Montesinos P, Selleslag D, Wei A, Jang JH, Falantes J, Voso MT, Sayar H, Porkka K, Marlton P, Almeida A, Mohan S, Ravandi F, Garcia-Manero G, Skikne B, Kantarjian H. Design of the randomized, Phase III, QUAZAR AML Maintenance trial of CC-486 (oral azacitidine) maintenance therapy in acute myeloid leukemia. Future Oncol. 2016 Feb;12(3):293-302. doi: 10.2217/fon.15.326. Epub 2016 Jan 19. PMID 26785287
• DERIVEDRavandi F, Dohner H, Wei AH, Montesinos P, Pfeilstocker M, Papayannidis C, Lai Y, Wang K, See WL, de Menezes DL, Petrlik E, Prebet T, Roboz GJ. Survival outcomes in patients with acute myeloid leukaemia who received subsequent therapy for relapse in QUAZAR AML-001. Br J Haematol. 2024 Mar;204(3):877-886. doi: 10.1111/bjh.19202. Epub 2023 Nov 12. PMID 37952982
• DERIVEDWei AH, Roboz GJ, Dombret H, Dohner H, Schuh AC, Montesinos P, Selleslag D, Bondarenko SN, Prebet T, Lai Y, Skikne B, Beach CL, Ravandi F. Survival outcomes with oral azacitidine maintenance in patients with acute myeloid leukemia in remission by receipt of initial chemotherapy: subgroup analyses from the phase III QUAZAR AML-001 trial. Haematologica. 2023 Oct 1;108(10):2820-2825. doi: 10.3324/haematol.2022.282296. No abstract available. PMID 36951156
• DERIVEDDohner H, Wei AH, Roboz GJ, Montesinos P, Thol FR, Ravandi F, Dombret H, Porkka K, Sandhu I, Skikne B, See WL, Ugidos M, Risueno A, Chan ET, Thakurta A, Beach CL, Lopes de Menezes D. Prognostic impact of NPM1 and FLT3 mutations in patients with AML in first remission treated with oral azacitidine. Blood. 2022 Oct 13;140(15):1674-1685. doi: 10.1182/blood.2022016293. PMID 35960871
• DERIVEDZhu J, Wu Q, Wang J, Niu T. Cost-effectiveness analysis of azacitidine maintenance therapy in patients with acute myeloid leukemia. Expert Rev Hematol. 2022 Apr;15(4):375-382. doi: 10.1080/17474086.2022.2061456. Epub 2022 May 11. PMID 35437111
• DERIVEDRoboz GJ, Ravandi F, Wei AH, Dombret H, Thol F, Voso MT, Schuh AC, Porkka K, La Torre I, Skikne B, Zhong J, Beach CL, Risueno A, Menezes DL, Ossenkoppele G, Dohner H. Oral azacitidine prolongs survival of patients with AML in remission independently of measurable residual disease status. Blood. 2022 Apr 7;139(14):2145-2155. doi: 10.1182/blood.2021013404.