Acute Myeloid Leukemia Clinical Trial
A Study of SNDX-5613 in Combination With Chemotherapy in Participants With Leukemia
The purpose of this study is to determine the safety and tolerability of SNDX-5613 when given in combination with 2 different chemotherapy regimens in participants with relapsed/refractory leukemias harboring lysine methyltransferase 2A (KMT2A) or mNPM1.
Key Inclusion Criteria:
Participants must have documented relapsed or refractory (R/R) AML, ALL, or MPAL harboring KMT2A leukemia gene rearrangement or mNPM1.
White blood count must be <50,000/microliter at time of enrollment. Participants may receive cytoreduction per protocol prior to beginning SNDX-5613.
Eastern Cooperative Oncology Group performance status score 0-2 (if aged ≥18 years); Karnofsky Performance Scale of ≥50 (if aged ≥16 years and <18 years); Lansky Performance Score of ≥50 (if aged <16 years).
Adequate liver and cardiac function
Participant must be taking 1 of the following medications for antifungal prophylaxis: itraconazole, ketoconazole, posaconazole, or voriconazole for at least 7 days prior to the start of study drug.
A female of childbearing potential must agree to use a highly effective method of contraception or double barrier method from the time of enrollment through 120 days following the last study drug dose.
A male of childbearing potential must agree to use barrier contraception from the time of enrollment through 120 days following the last study drug dose.
Key Exclusion Criteria:
Isolated extramedullary relapse
Any unresolved ≥Grade 2 reversible toxicity from previous anticancer therapy except alopecia or Grade 2 neuropathy
Graft-Versus-Host Disease (GVHD): Signs or symptoms of acute or chronic GVHD >Grade 0 within 4 weeks of enrollment. All transplant participants must have discontinued all systemic immunosuppressive therapy for at least 2 weeks and calcineurin inhibitors for at least 4 weeks prior to enrollment. Participants may be on physiological doses of steroids.
Concurrent malignancy in the previous 2 years, with the exception of basal cell carcinoma of the skin, squamous cell carcinoma of the skin, or carcinoma in situ (for example, breast carcinoma, cervical cancer in situ, melanoma in situ) treated with potentially curative therapy. Concurrent malignancy must be in complete remission or no evidence of disease during this timeframe. For participants with therapy-related leukemia, primary disease must be in remission for 1-year following completion of therapy.
If the participant is known to be human immunodeficiency virus (HIV)-positive, the participant must have undetectable HIV viral load within the previous 6 months.
Any of the following within the 6 months prior to study entry: myocardial infarction, uncontrolled/unstable angina, congestive heart failure (New York Heart Association Classification Class ≥II), life-threatening uncontrolled arrhythmia, cerebrovascular accident, or transient ischemic attack.
QT interval >450 milliseconds
Any gastrointestinal (GI) issue of the upper GI tract that might affect oral drug absorption or ingestion (for example, gastric bypass, gastroparesis).
Cirrhosis with a Child-Pugh score of B or C
Genetic syndromes: Bloom syndrome, ataxia-telangiectasia, Fanconi anemia, Kostmann syndrome, Shwachman syndrome, or any other known bone marrow failure syndrome.
Participation in another therapeutic interventional clinical study within 28 days of starting.
Radiation Therapy: within 60 days from prior total body irradiation, craniospinal radiation and/or ≥50% radiation of the pelvis, or within 14 days from local palliative radiation therapy (small port).
Stem Cell Infusion: within 60 days from hematopoietic stem cell transplantation and within 4 weeks (from first dose) from donor lymphocyte infusion without conditioning.
Biologics (for example, monoclonal antibody therapy, antibody-drug conjugates): within 7 days or 5 half-lives, whichever is longer, since the completion of therapy with a biologic agent.
Immunotherapy: within 42 days since prior immunotherapy, including tumor vaccines and checkpoint inhibitors, and within 21 days since receipt of chimeric antigen receptor therapy or other modified T-cell therapy.
Hematopoietic Growth Factors: within 7 days since the completion of therapy with short-acting hematopoietic growth factors and within 14 days with long-acting growth factors.
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