This is a multi-center, randomized, double-blinded, placebo controlled trial.

The purpose of this study is to evaluate the efficacy and safety of mocravimod as an adjunctive and maintenance treatment in adult acute myeloid leukemia (AML) patients undergoing allogeneic hematopoietic cell transplantation (HCT).

Inclusion Criteria:

• Diagnosis of AML (excluding acute promyelocytic leukemia) according to the WHO 2022 classification of AML and related precursor neoplasm, including AML with myelodysplasia-related gene mutations
• European Leukemia Net (ELN) high-risk or intermediate-risk AML in CR1, or AML of any risk in CR2, [CRi] is also allowable
• Planned allogeneic HCT from fully matched related or unrelated donor with no more than 1 antigen mismatch or planned use of haploidentical donor using PBSC graft
• Any conditioning regimen with a Transplant Conditioning Score (TCI) ≥ 1.5
• Planned use of TAC-based GvHD prophylaxis
• age ≥ 18 years and ≤ 75 years
• Eastern Cooperative Oncology Group (ECOG) performance status of 0 or 1

Exclusion Criteria:

• Use of CsA, anti-thymocyte globulin (ATG), alemtuzumab, abatacept for GvHD prophylaxis

• Diagnosis of macular edema during screening

• Cardiac/pulmonary/hepatic/renal dysfunction

• Hepatic dysfunction as defined by aspartate aminotransferase (AST) and/or alanine aminotransferase (ALT) > 2.5 x upper limit of normal (ULN); or total bilirubin > 1.5 mg/dL

• Renal dysfunction with estimated creatinine clearance < 45 mL/min by the Cockcroft-Gault formula

  • Diabetes mellitus
  • History or presence of uveitis at screening
  • History or diagnosis of macular edema