A Study Comparing the Combination of Dasatinib and Chemotherapy Treatment With or Without Blinatumomab for Children, Adolescents, and Young Adults With Philadelphia Chromosome Positive (Ph+) or Philadelphia Chromosome-Like (Ph-Like) ABL-Class B-Cell Acute Lymphoblastic Leukemia (B-ALL)

B Acute Lymphoblastic Leukemia Clinical Trial

Official title: A Randomized International Phase 3 Trial of Imatinib and Chemotherapy With or Without Blinatumomab in Patients With Newly-Diagnosed Philadelphia Chromosome-Positive or Philadelphia Chromosome-Like ABL-Class B-Cell Acute Lymphoblastic Leukemia

Status Not yet recruiting

Clinical Trial Summary

This phase III trial compares the effect of the combination of blinatumomab with dasatinib and standard chemotherapy versus dasatinib and standard chemotherapy for treating patients with Philadelphia chromosome positive (PH+) or Philadelphia chromosome-like (Ph-Like) ABL-class B-Cell acute lymphoblastic leukemia (B-ALL). Blinatumomab is a bispecific antibody that binds to two different proteins-one on the surface of cancer cells and one on the surface of cells in the immune system. An antibody is a protein made by the immune system to help fight infections and other harmful processes/cells/molecules. Blinatumomab may bind to the cancer cell and a T cell (which plays a key role in the immune system's fighting response) at the same time. Blinatumomab may strengthen the immune system's ability to fight cancer cells by activating the body's own immune cells to destroy the tumor. Dasatinib is in a class of medications called tyrosine kinase inhibitors. It works by blocking the action of an abnormal protein that signals cancer cells to multiply, which may help keep cancer cells from growing. Giving blinatumomab and dasatinib in combination with standard chemotherapy may work better in treating patients with PH+ or Ph-Like ABL-class B-ALL compared to dasatinib and chemotherapy alone.

Clinical Trial Description

PRIMARY OBJECTIVE:

I. To compare the 4-year event free survival (EFS) of children, adolescents, and young adults with Ph+ (BCR:ABL1-rearranged) and Ph-like ABL-class B- ALL who are randomized post-Induction to receive continuous dasatinib and the modified augmented Berlin-Frankfurt-Munster (mBFM) chemotherapy backbone (Arm A) versus continuous dasatinib and a chemotherapy backbone that incorporates three cycles of blinatumomab (Arm B) without traditional consolidation chemotherapy.

SECONDARY OBJECTIVES:

I. To compare the 4-year and long-term overall survival (OS) of all patients with Ph+ and Ph-like ABL-class B-ALL between randomized arms.

I. To compare post-induction/pre-maintenance toxicities (infections, mucositis, neurotoxicity, cytokine release syndrome, therapy delays > 14 days, and treatment-related mortality) between patients on the randomized study arms.

I. To compare end of consolidation (EOC)/timepoint 2 (TP2) minimal residual disease (MRD) negativity at the 1x10^-4 or 0.01% threshold between patients on the randomized study arms.

EXPLORATORY OBJECTIVES:

I. To describe rates of end of induction (EOI)/timepoint 1 (TP1) bone marrow MRD negativity with the introduction of dasatinib by induction day 15 for Ph+ and Ph-like ABL-class B-ALL patients as a whole cohort and as separate groups.

II. To describe EFS, disease-free survival (DFS), and overall survival (OS) of Ph+ and Ph-like ABL-class B-ALL patients separately and compared to historical controls.

III. To describe the outcomes of patients with Ph+ and Ph-like ABL-class B-ALL who are removed from protocol therapy due to consolidation failure.

IV. To describe the percentage of patients with Ph+ and Ph-like ABL-class B-ALL who continue tyrosine kinase inhibitors (TKI) beyond protocol-prescribed therapy and their outcomes.

V. To describe the prognostic significance of MRD by next-generation sequencing (NGS) at end of induction and end of consolidation.

VI. To describe the clinical characteristics and outcomes of patients with chronic myeloid leukemia (CML)-like biology.

VII. To describe the immune function of Ph+ and Ph-like ABL-class B-ALL patients between the two randomized arms and correlate with treatment response.

VIII. To describe the dasatinib levels in the plasma and cerebrospinal fluid of children with Ph+ and Ph-like ABL-class B-ALL and correlate with outcome.

IX. To describe the impact of dasatinib and high-dose methotrexate interaction and identify clinical and biologic factors influencing methotrexate clearance.

OUTLINE:

INDUCTION PART I: All patients receive dasatinib orally (PO) or nasogastrically (NG) once daily (QD) days 1-14 per standard of care (SOC).

Patients are randomized to 1 of 2 arms.

ARM I: INDUCTION PART II: Patients receive dasatinib PO or NG QD on days 15-29, daunorubicin intravenously (IV) over 15 minutes on days 15 and 22, prednisolone or prednisone PO twice daily (BID) on days 1-28, vincristine IV on days 15 and 22, methotrexate intrathecally (IT) on days 15, 22, and 29, and cytarabine IT on days 18 and 25 for 2 weeks on study.

CONSOLIDATION PART I: Patients receive dasatinib PO or NG QD on days 1-28, cyclophosphamide IV over 30-60 minutes on day 1, cytarabine IV over 30 minutes on says 1-4 and 8-11, mercaptopurine PO QD on days 1-14, methotrexate IT on days 1, 8, 15 and 22, pegaspargase IV or calaspargase pegol IV over 1-2 hours on day 15, and vincristine IV on days 1 and 22 over 4 weeks on study.

CONSOLIDATION PART II: Patients receive dasatinib PO or NG QD on day 29 until the end of consolidation, cyclophosphamide IV over 30-60 minutes on day 29, cytarabine IV over 30 minutes on days 29-32 and 36-39, mercaptopurine PO QD on days 29-42, methotrexate IT on days 1, 8, 15 and 22, pegaspargase IV or calaspargase pegol IV over 1-2 hours on day 43, and vincristine IV on days 43 and 50 over 4 weeks on study.

INTERIM MAINTENANCE I: Patients receive dasatinib PO or NG QD until the end of interim maintenance I, mercaptopurine PO QD on days 1-56, vincristine IV on days 8, 22, 36, and 50, methotrexate IT on days 8 and 36, high-dose methotrexate IV over 24 hours on days 8, 22, 36 and 50, and leucovorin PO or IV on days 10, 11, 24, 25, 38, 39, 52 and 53 over 9 weeks on study.

DELAYED INTENSIFICATION PART I: Patients receive dasatinib PO or NG QD on days 1-28, methotrexate IT on day 1, dexamethasone PO or IV on days 1-7 and 15-21, doxorubicin IV over 15 minutes on days 1, 8, and 15, vincristine IV on days 1, 8, and 15, and pegaspargase IV or calaspargase pegol IV over 1-2 hours on day 4 over 9 weeks on study.

DELAYED INTENSIFICATION PART II: Patients receive dasatinib PO or NG QD on day 29 until the end of delayed intensification part II, cyclophosphamide IV over 60 minutes on day 29, cytarabine IV over 30 minutes on days 29-32 and 36-39, methotrexate IT on days 29 and 36, thioguanine PO on days 29-42, pegaspargase IV or calaspargase pegol on day 43 and vincristine IV on days 43 and 50 over 9 weeks on study.

INTERIM MAINTENANCE PART II: Patients receive dasatinib PO or NG QD on day 1 until the end of interim maintenance part II, methotrexate IV on days 1, 11, 21, 31, and 41, vincristine IV on 1, 11, 21, 31, and 41, methotrexate IT on days 1 and 31, and pegaspargase IV or calaspargase pegol IV over 1-2 hours on days 2, 22 and 23 over 9 weeks on study.

MAINTENANCE: Patients receive dasatinib PO or NG QD on days 1-84, methotrexate IT on days 1 and 29, dexamethasone PO BID or IV on days 1-5, 29-33, and 57-61, mercaptopurine PO on days 1-84, vincristine IV on days 1, 29 and 57, and methotrexate PO on days 8, 15, 22, 29, 36, 43, 50, 57, 64, 71, and 78 on study. Cycles repeat every 12 weeks for 2 years in the absence of disease progression or unacceptable toxicity.

ARM II: INDUCTION PART II: Patients receive dasatinib PO or NG QD on days 15-29, daunorubicin intravenously (IV) over 15 minutes on days 15 and 22, prednisolone or prednisone PO BID on days 1-28, vincristine IV on days 15 and 22 methotrexate IT on days 15, 22, and 29 and cytarabine IT on days 18 and 25 over 2 weeks on study.

BLINATUMOMAB BLOCK I: Patients receive dexamethasone PO or IV on days 1 and 8, blinatumomab IV on days 1-28, dasatinib PO or NG on days 1-35, and methotrexate IT on days 1 and 15 over 5 weeks on study. Patients may undergo radiation therapy in 12 QD fractions.

BLINATUMOMAB BLOCK II: Patients receive dexamethasone PO or IV on day 1, blinatumomab IV on days 1-28, dasatinib PO or NG on days 1-35, and methotrexate IT on days 1 and 15 over 5 weeks on study.

INTERIM MAINTENANCE I: Patients receive dasatinib PO or NG QD until the end of interim maintenance I, mercaptopurine PO QD on days 1-56, vincristine IV on days 8, 22, 36, and 50, methotrexate IT on days 8 and 36, high-dose methotrexate IV over 24 hours on days 8, 22, 36 and 50, and leucovorin PO or IV on days 10, 11, 24, 25, 38, 39, 52 and 53 over 9 weeks on study.

BLINATUMOMAB BLOCK III: Patients receive blinatumomab IV on days 1-28, dasatinib PO or NG on days 1-35, and methotrexate IT on day 1 over 9 weeks on study.

DELAYED INTENSIFICATION PART I: Patients receive dasatinib PO or NG QD on days 1-28, methotrexate IT on day 1, dexamethasone PO or IV on days 1-7 and 15-21, doxorubicin IV over 15 minutes on days 1, 8, and 15, vincristine IV on days 1, 8, and 15, and pegaspargase IV or calaspargase pegol IV over 1-2 hours on day 4 over 9 weeks on study.

DELAYED INTENSIFICATION PART II: Patients receive dasatinib PO or NG QD on day 29 until the end of delayed intensification part II, cyclophosphamide IV over 60 minutes on day 29, cytarabine IV over 30 minutes on days 29-32 and 36-39, methotrexate IT on days 29 and 36, thioguanine PO on days 29-42, pegaspargase IV or calaspargase pegol over 1-2 hours on day 43 and vincristine IV on days 43 and 50 over 9 weeks on study.

INTERIM MAINTENANCE II: Patients receive dasatinib PO or NG QD until the end of interim maintenance II, methotrexate IV over 15 minutes on days 1, 11, 21, 31, and 41, vincristine IV on days 1, 11, 21, 31, and 41, methotrexate IT on days 1 and 31, and pegaspargase IV or calaspargase pegol IV over 1-2 hours on days 2 and 23 over 9 weeks on study.

All patients undergo echocardiography (ECHO) or multigated acquisition scan (MUGA) during screening. Patients also undergo blood and cerebrospinal fluid (CSF) sample collection and bone marrow biopsy throughout the study and as clinically indicated on study.

MAINTENANCE: Patients receive dasatinib PO or NG QD on days 1-84, methotrexate IT on days 1 and 29, dexamethasone PO BID or IV on days 1-5, 29-33, and 57-61, mercaptopurine PO on days 1-84, vincristine IV on days 1, 29 and 57, and methotrexate PO on days 8, 15, 22, 29, 36, 43, 50, 57, 64, 71, and 78 on study. Cycles repeat every 12 weeks for 2 years in the absence of disease progression or unacceptable toxicity. ;

Related Conditions & MeSH terms

• B Acute Lymphoblastic Leukemia
• Leukemia
• Leukemia, Lymphoid
• Philadelphia Chromosome
• Precursor Cell Lymphoblastic Leukemia-Lymphoma

• NCT number: NCT06124157
• Study type: Interventional
• Source: National Cancer Institute (NCI)
• Status: Not yet recruiting
• Phase: Phase 3
• Start date: July 22, 2024
• Completion date: December 1, 2030