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Phase 1b/2 Study of Axatilimab (SNDX-6352) + Azacitidine (AZA) in Advanced Phase MPN, MPN/MDS Overlap or High-Risk CMML


Description

This phase Ib/II trial tests the best dose of axatilimab and effectiveness of axatilimab with or without azacitidine for the treatment of patients with advanced phase myeloproliferative neoplasms (MPN), myeloproliferative neoplasm/myelodysplastic syndrome (MPN/MDS) overlap or high risk chronic myelomonocytic leukemia (CMML). Axatilimab is an antibody that is cloned from a single white blood cell that is known to be able to recognize cancer cells and block a protein on the surface of the white blood cells that may be involved in cancer cell growth. By blocking the proteins, this may slow or halt the growth of the cancer. Azacitidine is in a class of medications called antimetabolites. It works by stopping or slowing the growth of cancer cells. Giving axatilimab with or without azacitidine may be safe and effective in treating patients with advanced phase MPN, MPN/MDS overlap or high risk CMML.PRIMARY OBJECTIVES: I. To determine the recommended phase 2 dose (RP2D) of axatilimab in relap

Trial Eligibility

Inclusion Criteria: * Signed informed consent must be obtained prior to participation in the study * Age ≥ 18 years at the date of signing the informed consent form (ICF) * Morphologically confirmed diagnosis of the following based on 2016 World Health Organization (WHO) classification (Arber et al 2016): Phase 1b, patients with relapsed or refractory of any of the following; phase 2, patients with newly diagnosed of any of the following: * Chronic myelomonocytic leukemia (CMML), classified as intermediate-2, OR high-risk per the CMML Specific Prognostic Scoring System (CPSS) Molecular Model * Atypical chronic myelocytic leukemia (aCML) * MDS/MPN unclassified (MDS/MPN-U) * Myeloproliferative neoplasm accelerated phase (MPN-AP) * MPN-AP requires a previous diagnosis of polycythemia vera (PV), essential thrombocythemia (ET), or primary myelofibrosis (PMF) with intermediate-2 or high risk disease according to International Prostate Symptom Score (IPSS) as well as progression on or failure to respond to at least one line of therapy. * Myelodysplastic syndrome/myeloproliferative neoplasm with ring sideroblasts and thrombocytosis (MDS/MPN-RS-T) or MDS/MPN with SF3B1 mutation and thrombocytosis (MDS/MPN-SF3B1-T). * Not suitable for immediate myeloablative/intensive chemotherapy based on investigator assessment of age, comorbidities, local guidelines, institutional practice (any or all of these) * Eastern Cooperative Oncology Group (ECOG) performance status of 0, 1 or 2 * Aspartate aminotransferase (AST) and alanine aminotransferase (ALT) ≤ 3 × upper limit of normal (ULN) * Total bilirubin ≤ 1.5 × ULN (except in the setting of isolated Gilbert syndrome) * Estimated glomerular filtration rate (eGFR) ≥ 30 mL/min/1.73m\^2 (estimation based on Modification of Diet in Renal Disease \[MDRD\] formula, by local laboratory) * Patient is able to communicate with the investigator and has the ability to comply with the requirements of the study procedures * Women of childbearing potential and men, if not surgically sterilized, should use adequate contraception from 14 days prior to study entry and until 90 days after the last follow-up visit. Adequate contraception is defined as using hormonal contraceptives or an intrauterine device combined with at least 1 of the following forms of contraception: a diaphragm or cervical cap, or a condom Exclusion Criteria: * Previous treatment for MPN or MDS/MPN overlap with chemotherapy or other antineoplastic agents including lenalidomide and hypomethylating agent (HMAs) such as decitabine or azacitidine or INQOVI (oral decitabine) (patients who had up to 2 cycles of hypomethylating agents \[HMAs\] can be included). However, previous treatment with hydroxyurea and/or ruxolitinib is permitted * Diagnosis of acute myeloid leukemia (AML) including acute promyelocytic leukemia and extra-medullary AML based on WHO 2016 classification (Arber et al 2016) * Patients who are candidates for myeloablative or intensive chemotherapy treatment or who do not provide consent for this treatment * History of organ transplant or allogenic hematopoietic stem cell transplant * Participants with prior malignancy, except: * Participants with history of adequately treated malignancy for which no anticancer systemic therapy (namely chemotherapy, radiotherapy or surgery) is ongoing or required during the course of the study. * Participants who are receiving adjuvant therapy such as hormone therapy are eligible. However, participants who developed therapy related neoplasms are not eligible * Previous known allergy/sensitivity to components of axatilimab * History of acute or chronic pancreatitis * History of myositis

Study Info

Organization

Ohio State University Comprehensive Cancer Center


Primary Outcome

Incidence of dose limiting toxicities


Outcome Timeframe Up to 42 days after the first dose of study medication

NCTID NCT06523556

Phases PHASE1,PHASE2

Primary Purpose TREATMENT

Start Date 2024-08-02

Completion Date 2025-12-31

Enrollment Target 52

Interventions

BIOLOGICAL Axatilimab

DRUG Azacitidine

PROCEDURE Biospecimen Collection

PROCEDURE Bone Marrow Aspiration and Biopsy

OTHER Survey Administration

Locations Recruiting

Ohio State University Comprehensive Cancer Center

United States, Ohio, Columbus


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