A Study to Investigate Blinatumomab in Combination With Chemotherapy in Patients With Newly Diagnosed B-Lymphoblastic Leukemia

Summary

This phase III trial studies how well blinatumomab works in combination with chemotherapy in treating patients with newly diagnosed, standard risk B-lymphoblastic leukemia or B-lymphoblastic lymphoma with or without Down syndrome. Monoclonal antibodies, such as blinatumomab, may induce changes in the body's immune system and may interfere with the ability of cancer cells to grow and spread. Chemotherapy drugs, such as vincristine, dexamethasone, prednisone, prednisolone, pegaspargase, methotrexate, cytarabine, mercaptopurine, doxorubicin, cyclophosphamide, and thioguanine, work in different ways to stop the growth of cancer cells, either by killing the cells, by stopping them from dividing, or by stopping them from spreading. Leucovorin decreases the toxic effects of methotrexate. Giving monoclonal antibody therapy with chemotherapy may kill more cancer cells. Giving blinatumomab and combination chemotherapy may work better than combination chemotherapy alone in treating patients with B-ALL. This trial also assigns patients into different chemotherapy treatment regimens based on risk (the chance of cancer returning after treatment). Treating patients with chemotherapy based on risk may help doctors decide which patients can best benefit from which chemotherapy treatment regimens.

Description

PRIMARY OBJECTIVES:

I. To determine in a randomized manner if the addition of 2 cycles of blinatumomab to standard therapy improves disease-free survival (DFS) in patients with standard risk (SR) B-ALL and higher risk features (SR-High), and patients with standard-risk average (SR-Avg) B-ALL who are negative for minimal residual disease (MRD) by flow cytometry but have detectable or indeterminate MRD as measured by high-throughput sequencing (HTS) at end of induction (EOI).

II. To confirm that boys in the standard-risk favorable (SR-Fav) subset of B-ALL, with or without Down syndrome (DS), will maintain a 5-year DFS of greater than 93% when treated with a standard chemotherapy regimen with a treatment duration of 2 years from the start of interim maintenance I (IM1).