A Phase 2 Trial of Fractionated Gemtuzumab Ozogamicin to Eradicate Measurable Residual Disease in Acute Myeloid Leukemia Patients (GO for MRD)

  • End date
    Jun 1, 2024
  • participants needed
  • sponsor
    University of Washington
Updated on 15 September 2022
myeloid leukemia
flow cytometry
monoclonal antibodies
gilbert's syndrome
induction chemotherapy
residual tumor
acute promyelocytic leukemia
blast cells
gemtuzumab ozogamicin
PCR test
tumor cells
monoclonal protein


This phase II trial studies the how well fractionated gemtuzumab ozogamicin works in treating measurable residual disease in patients with acute myeloid leukemia. Gemtuzumab ozogamicin is a monoclonal antibody, called gemtuzumab, linked to a chemotherapy drug, called ozogamicin. Gemtuzumab is a form of targeted therapy because it attaches to specific molecules (receptors) on the surface of cancer cells, known as CD33 receptors, and delivers a chemotherapy known as calicheamicin to kill them.



Patients receive gemtuzumab ozogamicin intravenously (IV) on days 1, 4, 7. Treatment continues for 35 days in the absence of disease progression or unacceptable toxicity. Responders and non-responders, without significant adverse events during the first course, may receive a second course of gemtuzumab ozogamicin within 60 days after course 1.

After completion of study treatment, patients are followed up for 6 months.

Condition Acute Myeloid Leukemia
Treatment quality-of-life assessment, gemtuzumab ozogamicin
Clinical Study IdentifierNCT03737955
SponsorUniversity of Washington
Last Modified on15 September 2022


Yes No Not Sure

Inclusion Criteria

Prior diagnosis AML based on 2016 World Health Organization criteria. Acute promyelocytic leukemia (APL) and biphenotypic AML are not eligible
Patients must have MRD-level disease only and otherwise meet criteria for complete response (CR) or complete remission with incomplete hematologic recovery (CRi) per the 2017 European Leukemia Net response criteria (< 5% blasts in the marrow without a requirement for peripheral blood count recovery). MRD must be measurable by multiparameter flow cytometry (MPFC) and/or polymerase chain reaction (PCR)-based molecular markers and/or karyotypic markers (e.g., classical cytogenetics or fluorescence in situ hybridization). MRD status will be centrally confirmed by the UW/FHCRC clinical laboratory in order to standardize response assessment following administration of study therapy
Patients must have received at least 1 cycle of standard induction chemotherapy prior to enrollment on the study. However, adult patients (>= 18 years of age) are eligible for participation at any time point in treatment (after induction, during or after consolidation, pre-transplant, or post-transplant). Pediatric patients (2-18 years of age) must have MRD positivity during/after consolidation or post-transplant
Age >= 2 years of age
Eastern Cooperative Oncology Group (ECOG) performance status =< 3 (for adults) or Lansky performance status >= 40 (for children)
Patient's AML blasts must have CD33 expression
For adults (>= 18 years of age): Serum creatinine =< 2.0 mg/dL
For adults (>= 18 years of age): Total bilirubin =< 2 x institutional upper limit of normal for age (unless known history of Gilbert's disease)
For adults (>= 18 years of age): Aspartate aminotransferase (AST) and alanine aminotransferase (ALT) < 2.5 x institutional upper limit of normal for age (unless thought to be related to resolving infectious complications)
For children (< 18 years of age): Glomerular filtration rate (GFR) in ml/min (age 2: 63-175; age 3-12: 89-165; females 13 and older: 75-115; males 13 and older: 85-125)
For children (< 18 years of age): Total bilirubin =< 2 x institutional upper limit of normal for age (unless known history of Gilbert's disease)
For children (< 18 years of age): AST and ALT < 2.5 x institutional upper limit of normal for age (unless thought to be related to resolving infectious complications)
Ability of patient or representative to provide written informed consent
Females of childbearing potential must have a negative pregnancy test prior to receiving GO
Patients who re-enroll must have achieved an MRD-negative CR during their prior enrollment

Exclusion Criteria

Subjects who have had chemotherapy or radiation therapy within 14 days prior to entering the study
Subjects may not be receiving other investigational agents
Uncontrolled or concurrent illness including, but not limited to, uncontrolled infection, symptomatic congestive heart failure, unstable angina pectoris, cardiac arrhythmia, or psychiatric illness/social situations that would limit compliance with study requirements
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Additional screening procedures may be conducted by the study team before you can be confirmed eligible to participate.

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If you are confirmed eligible after full screening, you will be required to understand and sign the informed consent if you decide to enroll in the study. Once enrolled you may be asked to make scheduled visits over a period of time.

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