This phase Ib trial tests the safety, side effects, best dose and effectiveness of tagraxofusp in combination with azacitidine as maintenance therapy in treating patients with CD123 positive acute myeloid leukemia (AML) and myelodysplastic syndrome (MDS) after a donor (allogeneic) hematopoietic cell transplant. An allogeneic hematopoietic cell transplant (HCT) is a type of transplant where the cancer patient receives cells from another person. Maintenance therapy is given after the transplant to prevent the cancer from coming back. Tagraxofusp is a drug that targets cells that have CD123 on their surface in order to kill the cancer cells to help prevent the cancer from coming back. Azacitidine is in a class of medications called demethylation agents. It works by helping the bone marrow to produce normal blood cells and by killing abnormal cells. Giving tagraxofusp in combination with azacitidine may be safe, tolerable and/or effective maintenance therapy in patients with CD123 positive AML and MDS after an allogeneic HCT.
Documented informed consent of the participant and/or legally authorized representative
Agreement to allow the use of archival tissue from diagnostic tumor biopsies.
If unavailable, exceptions may be granted with study principal investigator (PI) approval
Age: 18-75 years old
History of allergic reactions attributed to compounds of similar chemical or biologic composition to study agents (tagraxofusp and azacitidine)
Females only: Pregnant or breastfeeding
Any other condition including, but not limited to, uncontrolled infection, disseminated intravascular coagulation, or psychiatric illness, that would, in the Investigator's judgment, contraindicate the patient's participation in the clinical study due to safety concerns with clinical study procedures
The patient has an active malignancy and/or cancer history that may confound the assessment of the study endpoints. Patients with a past cancer history (within 2 years of entry) with substantial potential for recurrence and/or ongoing active malignancy must be discussed with the sponsor before study entry. Patients with the following neoplastic diagnoses are eligible: non-melanoma skin cancer, carcinoma in situ, cervical intraepithelial neoplasia, organ-confined prostate cancer with no evidence of progressive disease
City of Hope Medical Center
Lead sponsor
National Cancer Institute (NCI)
Collaborator