Restoring p53 wild-type conformation in TP53-Y220C-mutant acute myeloid leukemia.
Bing Z Carter, Po Yee Mak, Edward Ayoub...
https://pubmed.ncbi.nlm.nih.gov/40608889/Actively Recruiting
Led by M.D. Anderson Cancer Center · Updated on 2026-07-29
24
Participants Needed
2
Research Sites
104 weeks
Total Duration
Researchers are evaluating rezatapopt combined with azacitidine in patients with TP53Y220C-mutant myeloid malignancies, including acute myeloid leukemia AML and myelodysplastic syndrome MDS. This phase Ib study aims to assess the safety and tolerability of rezatapopt and also looks at its clinical effectiveness, event-free survival, overall survival, and duration of response in both newly diagnosed and relapsed or refractory patients. The study also explores genetic changes related to TP53Y220C mutations and immunologic profiles. Participants receive oral rezatapopt daily along with intravenous azacitidine for 7 days in each treatment cycle. Treatment is administered either in an inpatient or outpatient setting. The study focuses on adults with confirmed TP53Y220C mutations and specific classifications of MDS. The design is a single-group, non-randomized treatment study. Throughout the study, participants are closely monitored for safety and adverse events over about one year. Assessments include genetic sequencing of bone marrow samples, evaluation of mutation changes, and immunologic markers. Participants must adhere to visit schedules and undergo laboratory tests to evaluate organ function and treatment response. The total study duration extends up to August 2029, ensuring long-term follow-up and data collection.
CONDITIONS
A Phase Ib Study of Rezatapopt in Combination With Azacitidine in Patients With TP53Y220C Mutant Myeloid Malignancies (Acute Myeloid Leukemia or Myelodysplastic Syndrome)
C
Courtney DiNardo, MD
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M.D. Anderson Cancer Center
Lead Sponsor
Memorial Sloan Kettering Cancer Center
Collaborating Sponsor
This table compares participation in this trial with other options available for this condition. The information is drawn from published research and the trial’s study details and is provided for educational purposes only.
| Factors | Rezatapopt + Azacitidine Combination | Azacitidine Monotherapy (Current Backbone) |
|---|---|---|
| What it is | A new investigational regimen combining rezatapopt (oral, targeting TP53Y220C mutation) and azacitidine (intravenous backbone therapy), studied in adults with relapsed/refractory AML or MDS carrying TP53Y220C mutation and not candidates for intensive chemotherapy. | Azacitidine monotherapy is the backbone hypomethylating agent recommended by guidelines for adults with AML or MDS and TP53 mutation who are not eligible for intensive chemotherapy. |
| Role in trial | First and only investigational study arm in the trial; all enrolled participants receive this regimen. | Used externally as backbone therapy for similar patients in guideline-driven care; not tested as a standalone arm in this trial. |
| Primary use | To restore p53 wild-type function and induce remission in patients with relapsed/refractory TP53Y220C-mutant AML or MDS by combining molecular targeting (rezatapopt) with backbone hypomethylation (azacitidine). | To stabilize disease and prolong survival in TP53-mutant AML or MDS patients not eligible for intensive chemotherapy, primarily as a hypomethylating agent. |
| How it is given or performed | Rezatapopt is administered orally with food; azacitidine is given intravenously. Both drugs are used together as per trial dosing schedule. | Azacitidine is administered either intravenously or subcutaneously as a daily or cyclic regimen, following standard dosing protocols. |
| Evidence maturity | This regimen is investigational, with preclinical evidence supporting molecular mechanism and ongoing phase Ib clinical testing. No mature published clinical outcomes yet. | Azacitidine monotherapy is supported by guideline evidence and extensive clinical trial data for TP53-mutant AML/MDS, but overall responses are modest and long-term remission rates are low in this high-risk subgroup. |
| Important limitations | Clinical safety and efficacy are not yet established for this investigational combination. Early clinical results are pending, and long-term outcomes in TP53Y220C-mutant patients remain unknown. | Azacitidine monotherapy provides limited response rates and survival in TP53-mutant AML/MDS, particularly in patients with high-risk mutations such as Y220C. Durable remissions are rare and therapeutic options remain limited. |
Disclaimer: This comparison is created with the help of artificial intelligence(AI) and may contain errors or missing information. It is not medical advice and does not mean one option is better or safer than another. Clinical trials are still being studied, and joining a trial is your choice. Please consult your healthcare professional before making any decisions.
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Duration - 2 to 4 weeks
Participants are screened for eligibility to participate in the trial.
1 visit (in-person)
Duration - Up to study completion in 2029
Participants receive oral rezatapopt daily along with intravenous azacitidine for 7 days in each cycle, either as inpatients or outpatients.
Regular visits during treatment cycles
Duration - Approximately 1 year
Participants are monitored for safety and response, including genetic and immunologic assessments over about one year.
Scheduled safety and assessment visits
Study Type
INTERVENTIONAL
Masking
NONE
Allocation
NA
Model
SINGLE_GROUP
Primary Purpose
TREATMENT
Number of Arms
1
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Bing Z Carter, Po Yee Mak, Edward Ayoub...
https://pubmed.ncbi.nlm.nih.gov/40608889/M.D. Anderson Cancer Center
Lead Sponsor
Memorial Sloan Kettering Cancer Center
Collaborating Sponsor