Summary

This phase III trial studies whether inotuzumab ozogamicin added to post-induction chemotherapy for patients with High-Risk B-cell Acute Lymphoblastic Leukemia (B-ALL) improves outcomes. This trial also studies the outcomes of patients with mixed phenotype acute leukemia (MPAL), and B-lymphoblastic lymphoma (B-LLy) when treated with ALL therapy without inotuzumab ozogamicin. Inotuzumab ozogamicin is a monoclonal antibody, called inotuzumab, linked to a type of chemotherapy called calicheamicin. Inotuzumab attaches to cancer cells in a targeted way and delivers calicheamicin to kill them. Other drugs used in the chemotherapy regimen, such as cyclophosphamide, cytarabine, dexamethasone, doxorubicin, daunorubicin, methotrexate, leucovorin, mercaptopurine, prednisone, thioguanine, vincristine, and pegaspargase or calaspargase pegol 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. This trial will also study the outcomes of patients with mixed phenotype acute leukemia (MPAL) and disseminated B lymphoblastic lymphoma (B-LLy) when treated with high-risk ALL chemotherapy.

The overall goal of this study is to understand if adding inotuzumab ozogamicin to standard of care chemotherapy maintains or improves outcomes in High Risk B-cell Acute Lymphoblastic Leukemia (HR B-ALL). The first part of the study includes the first two phases of therapy: Induction and Consolidation. This part will collect information on the leukemia, as well as the effects of the initial treatment, to classify patients into post-consolidation treatment groups. On the second part of this study, patients with HR B-ALL will receive the remainder of the chemotherapy cycles (interim maintenance I, delayed intensification, interim maintenance II, maintenance), with some patients randomized to receive inotuzumab. The patients that receive inotuzumab will not receive part of delayed intensification. Other aims of this study include investigating whether treating both males and females with the same duration of chemotherapy maintains outcomes for males who have previously been treated for an additional year compared to girls, as well as to evaluate the best ways to help patients adhere to oral chemotherapy regimens. Finally, this study will be the first to track the outcomes of subjects with disseminated B-cell Lymphoblastic Leukemia (B-LLy) or Mixed Phenotype Acute Leukemia (MPAL) when treated with B-ALL chemotherapy.

Objectives

PRIMARY OBJECTIVE:
I. To compare in a randomized manner the 5-year disease-free survival (DFS) for children and young adults with High Risk (HR) B-cell acute lymphoblastic leukemia (B-ALL) treated with modified Berlin-Frankfurt-Munster (mBFM) chemotherapy without delayed intensification (DI) part 2, but with the addition of two blocks of inotuzumab ozogamicin, versus those treated with full mBFM chemotherapy backbone including DI Part 2 without the addition of inotuzumab ozogamicin.

SECONDARY OBJECTIVES:
I. To describe the 5-year DFS for a favorable risk subset of National Cancer Institute (NCI) HR B-ALL (HR-Fav) when treated with mBFM chemotherapy with a single high-dose methotrexate (HD-MTX) interim maintenance (IM) phase and treatment duration of 2 years from the start of IM regardless of sex.
II. To determine the toxicity and tolerability of inotuzumab ozogamicin integrated into the mBFM chemotherapy backbone in HR B-ALL including toxicity experienced during phases of therapy subsequent to inotuzumab ozogamicin.
III. To describe the 5-year event-free survival (EFS) for patients with mixed phenotype acute leukemia (MPAL) receiving mBFM HR B-ALL therapy that includes a second IM phase with Capizzi intravenous (IV) methotrexate without leucovorin rescue plus pegaspargase or calaspargase pegol (C-MTX).
IV. To describe the 5-year EFS for patients with disseminated (Murphy stage III-IV) B-cell lymphoblastic lymphoma (B-LLy) receiving mBFM HR B-ALL therapy that includes a second IM phase with C-MTX.

EXPLORATORY OBJECTIVES:
I. To describe the therapy administered, disease response, and survival outcomes of patients with MPAL who come off protocol therapy due to poor disease response to ALL therapy either during Induction, at end of induction (EOI), or at end of consolidation (EOC).
II. To define the prevalence and significance of minimal marrow disease (MMD) at diagnosis and bone marrow minimal residual disease (MRD) at EOI in disseminated B-LLy.
III. To determine the impact of proposed adherence-enhancing interventions on adherence to oral 6-mercaptopurine in patients with ALL.

OUTLINE: All patients receive the same Induction and Consolidation chemotherapy. Patients with HR-Fav B-ALL are assigned to Arm I. Patients with HR B-ALL are randomized to Arm II or III. Patients with MPAL are assigned to Arm IV, and patients with B-LLy are assigned to Arm V.

All patients with B-ALL receive Induction and Consolidation therapy:

INDUCTION: Patients receive cytarabine intrathecally (IT) on day 1 and central nervous system (CNS)2 patients also receive cytarabine IT on days 4, 5 or 6 and 11 or 12. Patients also receive vincristine intravenously (IV) on days 1, 8, 15, and 22, daunorubicin IV over 1-15 minutes days 1, 8, 15, and 22, pegaspargase or calaspargase pegol IV over 1-2 hours or pegaspargase intramuscularly (IM) on day 4, and methotrexate IT on days 8 and 29 (and on days 15 and 22 for CNS3 patients). Patients < 10 years old receive dexamethasone orally (PO) twice daily (BID) or IV on days 1-14; patients >= 10 years old receive prednis(ol)one PO BID or IV on days 1-28. Treatment continues for 5 weeks in the absence of disease progression or unacceptable toxicity. Calaspargase pegol can only be given to patients less than 22 years of age.

CONSOLIDATION: Patients receive cyclophosphamide IV over 30-60 minutes on days 1 and 29, cytarabine IV over 1-30 minutes or subcutaneously (SC) on days 1-4, 8-11, 29-32, and 36-39, mercaptopurine PO once daily (QD) on days 1-14 and 29-42, and methotrexate IT on days 1, 8, 15, and 22 (CNS3 patients receive methotrexate IT on days 1 and 8). Patients also receive vincristine IV on days 15, 22, 43, and 50, and pegaspargase or calaspargase pegol IV over 1-2 hours or pegaspargase IM on days 15 and 43. Treatment continues for 8 weeks in the absence of disease progression or unacceptable toxicity. Additionally, patients with testicular disease at diagnosis that does not resolve by the end of induction will undergo radiation therapy over 12 once daily fractions. Calaspargase pegol can only be given to patients less than 22 years of age.

POST-CONSOLIDATION THERAPY: After Consolidation, based on clinical features and response, patients with B-ALL are designated as HR-Fav or HR B-ALL. Patients with HR-Fav B-ALL are assigned to Arm I. Patients with HR B-ALL are randomized to Arm II or III. Patients with MPAL and B-LLy are assigned to therapy arms (Arms IV and V) that are identical to Arm II. Patients that are < 10 years, have CNS1, no testicular leukemia, with favorable cytogenetics (ETV6 RUNX1 fusion or double trisomies [4 and 10]), =< 24 hours of steroids in the two weeks prior to diagnosis, and EOI MRD < 0.01% are assigned to Arm I. Patients with HR B-ALL who are surface CD22 positive at diagnosis and have MRD < 0.01% by the end of Consolidation, are randomized to either Arm II or III.

ARM I: HR-FAV B-ALL (Patients that are < 10 years, have CNS1 status, no testicular leukemia, with favorable cytogenetics (ETV6 RUNX1 fusion or double trisomies [4 and 10]), =< 24 hours of steroids in the two weeks prior to diagnosis, and EOI MRD < 0.01%)

INTERIM MAINTENANCE: Patients receive vincristine IV on days 1, 15, 29, and 43, high dose methotrexate IV over 24 hours on days 1, 15, 29, and 43, leucovorin PO or IV on days 3-4, 17-18, 31-32, and 45-46, mercaptopurine PO QD on days 1-14, 15-28, 29-42, and 43-56, and methotrexate IT on days 1 and 29. Treatment continues for 9 weeks in the absence of disease progression or unacceptable toxicity.

DELAYED INTENSIFICATION (PART I): Patients receive methotrexate IT on day 1, dexamethasone PO BID or IV on days 1-7 and 15-21, vincristine IV on days 1, 8, and 15, doxorubicin IV over 1-15 minutes or up to 1 hour on days 1, 8, and 15, and pegaspargase or calaspargase pegol IV over 1-2 hours or pegaspargase IM on day 4. Treatment (Parts I and II of Delayed Intensification) continues for 9 weeks in the absence of disease progression or unacceptable toxicity. Calaspargase pegol can only be given to patients less than 22 years of age.

DELAYED INTENSIFICATION (PART II): Patients receive cyclophosphamide IV over 30-60 minutes on day 29, thioguanine PO on days 29-42, cytarabine IV over 1-30 minutes or SC on days 29-32 and 36-39, methotrexate IT on days 29 and 36, vincristine IV on days 43 and 50, and pegaspargase or calaspargase pegol IV over 1-2 hours or pegaspargase IM on day 43. Treatment (Parts I and II of Delayed Intensification) continues for 9 weeks in the absence of disease progression or unacceptable toxicity. Calaspargase pegol can only be given to patients less than 22 years of age.

MAINTENANCE: Patients receive methotrexate IT on days 1 and 29 for cycles 1-4, and day 1 for subsequent cycles. Patients also receive vincristine IV on day 1, prednisolone PO BID or IV on days 1-5, mercaptopurine PO QD on days 1-84, and methotrexate PO on days 8, 15, 22, 29 (excluded in cycles 1-4), 36, 43, 50, 57, 64, 71, and 78. Cycles repeat every 12 weeks for up to 2 years in the absence of disease progression or unacceptable toxicity.

Patients with HR B-ALL who have MRD < 0.01% by the end of Consolidation, and leukemic blasts positive for surface CD22 at diagnosis are randomized to Arm II or Arm III.

ARM II: HR B-ALL (CONTROL)
INTERIM MAINTENANCE I: Patients receive vincristine IV on days 1, 15, 29 and 43, high dose methotrexate IV over 24 hours on days 1, 15, 29 and 43, leucovorin PO or IV on days 3-4, 17-18, 31-32, 45-46, mercaptopurine PO QD on days 1-14, 15-28, 29-42, and 43-56, and methotrexate IT on days 1 and 29. Treatment continues for 9 weeks in the absence of disease progression or unacceptable toxicity.

DELAYED INTENSIFICATION (PART I): Patients receive methotrexate IT on day 1, dexamethasone PO BID or IV on days 1-7 and 15-21, vincristine IV on days 1, 8, and 15, doxorubicin IV over 1-15 minutes or up to 1 hour on days 1, 8, and 15, and pegaspargase or calaspargase pegol IV over 1-2 hours or pegaspargase IM on day 4. Treatment (Parts I and II of Delayed Intensification) continues for 9 weeks in the absence of disease progression or unacceptable toxicity. Calaspargase pegol can only be given to patients less than 22 years of age.

DELAYED INTENSIFICATION (PART II): Patients receive cyclophosphamide IV over 30-60 minutes on day 29, thioguanine PO on days 29-42, cytarabine IV over 1-30 minutes or SC on days 29-32 and 36-39, methotrexate IT on days 29 and 36, vincristine IV on days 43 and 50, and pegaspargase or calaspargase pegol IV over 1-2 hours or pegaspargase IM on day 43. Treatment (Parts I and II of Delayed Intensification) continues for 9 weeks in the absence of disease progression or unacceptable toxicity. Calaspargase pegol can only be given to patients less than 22 years of age.

INTERIM MAINTENANCE II: Patients receive vincristine on days 1, 11, 21, 31 and 41, methotrexate IV over 2-15 minutes or 10-15 minutes on days 1, 11, 21, 31, and 41, methotrexate IT on days 1 and 31, and pegaspargase or calaspargase pegol IV over 1-2 hours on days 2 and 22 (pegaspargase) or 23 (calaspargase) or pegaspargase IM on days 2 and 22. Treatment continues for 8 weeks in the absence of disease progression or unacceptable toxicity. Calaspargase pegol can only be given to patients less than 22 years of age.

ARM III: HR B-ALL (EXPERIMENTAL)
INOTUZUMAB OZOGAMICIN (InO) BLOCK 1: Patients receive inotuzumab ozogamicin IV over 60 minutes on days 1, 8, and 15 and methotrexate IT on day 1. Treatment continues for 4 weeks in the absence of disease progression or unacceptable toxicity.

INTERIM MAINTENANCE I: Patients receive vincristine IV on days 1, 15, 29 and 43, high dose methotrexate IV over 24 hours on days 1, 15, 29, and 43, leucovorin PO or IV on days 3-4, 17-18, 31-32, and 45-46, mercaptopurine PO on days 1-14, 15-28, 29-42, and 43-56, and methotrexate IT on days 1 and 29. Treatment continues for 9 weeks in the absence of disease progression or unacceptable toxicity.

DELAYED INTENSIFICATION (Part I): Patients receive methotrexate IT on day 1, dexamethasone PO BID or IV on days 1-7 and 15-21, vincristine IV on days 1, 8, and 15, doxorubicin IV over 1-15 minutes or up to 1 hour on days 1, 8, and 15, and pegaspargase or calaspargase pegol IV over 1-2 hours or pegaspargase IM on day 4. Treatment (Parts I and II of Delayed Intensification) continues for 5 weeks in the absence of disease progression or unacceptable toxicity. Calaspargase pegol can only be given to patients less than 22 years of age.

InO BLOCK 2: Patients receive inotuzumab ozogamicin IV over 60 minutes on days 1, 8, and 15. Treatment continues for 4 weeks in the absence of disease progression or unacceptable toxicity.

INTERIM MAINTENANCE II: Patients receive vincristine IV on days 1, 11, 21, 31, and 41, methotrexate IV on days 1, 11, 21, 31, and 41, methotrexate IT on days 1 and 31, and pegaspargase or calaspargase pegol IV over 1-2 hours on days 2 and 22 (pegaspargase) or 23 (calaspargase) or pegaspargase IM on days 2 and 22. Treatment continues for 8 weeks in the absence of disease progression or unacceptable toxicity. Calaspargase pegol can only be given to patients less than 22 years of age.

ARMS II AND III: HR B-ALL
MAINTENANCE: Patients receive vincristine IV on day 1, prednisolone PO BID or IV on days 1-5, mercaptopurine PO on days 1-84, methotrexate PO on days 8, 15, 22, 29 (excluded in cycles 1 and 2), 36, 43, 50, 57, 64, 71 and 78, and methotrexate IT on days 1 (and 29 of cycles 1-2 for patients who do not receive cranial radiation). Cycles repeat every 12 weeks for up to 2 years in the absence of disease progression or unacceptable toxicity. Patients with CNS3 disease undergo cranial radiation therapy over 10 fractions during the first 4 weeks.

ARM IV: MPAL
INDUCTION: Patients receive cytarabine IT on day 1 and CNS2 patients also receive cytarabine IT on days 4, 5 or 6 and 11 or 12. Patients also receive vincristine IV on days 1, 8, 15, and 22, daunorubicin IV over 1-15 minutes days 1, 8, 15, and 22, pegaspargase or calaspargase pegol IV over 1-2 hours or pegaspargase IM on day 4, and methotrexate IT on days 8 and 29 (and on days 15 and 22 for CNS3 patients). Patients < 10 years old receive dexamethasone PO BID or IV on days 1-14; patients >= 10 years old receive prednisolone PO BID or IV on days 1-28. Treatment continues for 5 weeks in the absence of disease progression or unacceptable toxicity. Calaspargase pegol can only be given to patients less than 22 years of age.

CONSOLIDATION: Patients receive cyclophosphamide IV over 30-60 minutes on days 1 and 29, cytarabine IV over 1-30 minutes or SC on days 1-4, 8-11, 29-32, and 36-39, mercaptopurine PO on days 1-14 and 29-42, methotrexate IT on days 1, 8, 15, and 22 (excluded on days 15 and 22 for CNS3 patients), vincristine IV on days 15, 22, 43, and 50, and pegaspargase or calaspargase pegol IV over 1-2 hours or pegaspargase IM on days 15 and 43. Treatment continues for 8 weeks in the absence of disease progression or unacceptable toxicity. Patients with testicular disease at diagnosis that does not resolve by the end of induction will and continued evidence of testicular disease at end of induction undergo testicular radiation over 12 once-daily fractions. Calaspargase pegol can only be given to patients less than 22 years of age.

ARM V: B-LLY
INDUCTION: Patients receive cytarabine IT on day 1 and CNS2 patients also receive cytarabine IT on days 4, 5 or 6 and 11 or 12. Patients also receive vincristine IV on days 1, 8, 15, and 22, daunorubicin IV over 1-15 minutes days 1, 8, 15, and 22, pegaspargase or calaspargase pegol IV over 1-2 hours or pegaspargase IM on day 4, and methotrexate IT on days 8 and 29 (and on days 15 and 22 for CNS3 patients). Patients < 10 years old receive dexamethasone PO BID or IV on days 1-14; patients >= 10 years old receive prednisolone PO BID or IV on days 1-28. Treatment continues for 5 weeks in the absence of disease progression or unacceptable toxicity. Calaspargase pegol can only be given to patients less than 22 years of age.

CONSOLIDATION: Patients receive cyclophosphamide IV over 30-60 minutes on days 1 and 29, cytarabine IV over 1-30 minutes or SC on days 1-4, 8-11, 29-32, and 36-39, mercaptopurine PO on days 1-14 and 29-42, methotrexate IT on days 1, 8, 15, and 22 (excluded on days 15 and 22 CNS3 patients), vincristine IV on days 15, 22, 43, and 50, and pegaspargase or calaspargase pegol IV over 1-2 hours or pegaspargase IM on days 15 and 43. Treatment continues for 8 weeks in the absence of disease progression or unacceptable toxicity. Patients with testicular disease at diagnosis that does not resolve by the end of induction will and continued evidence of testicular disease at end of induction undergo testicular radiation therapy over 12 once-daily fractions. Calaspargase pegol can only be given to patients less than 22 years of age.

ARM IV AND V: MPAL AND B-LLY (Post-Consolidation Therapy)
INTERIM MAINTENANCE I: Patients receive vincristine IV on days 1, 15, 29, and 43, high dose methotrexate IV over 24 hours on days 1, 15, 29, and 43, leucovorin PO or IV on days 3-4, 17-18, 31-32, and 45-46, methotrexate IT on days 1 and 29 and mercaptopurine PO QD on days 1-14, 15-28, 29-42, and 43-56. Treatment continues for 9 weeks in the absence of disease progression or unacceptable toxicity.

DELAYED INTENSIFICATION (PART I): Patients receive methotrexate IT on day 1, dexamethasone PO BID or IV on days 1-7 and 15-21, vincristine IV on days 1, 8, and 15, doxorubicin IV over 1-15 minutes or up to 1 hour on days 1, 8, and 15, and pegaspargase or calaspargase pegol IV over 1-2 hours or pegaspargase IM on day 4. Treatment (Parts I and II of Delayed Intensification) continues for 9 weeks in the absence of disease progression or unacceptable toxicity. Calaspargase pegol can only be given to patients less than 22 years of age.

DELAYED INTENSIFICATION (PART II): Patients receive cyclophosphamide IV over 30-60 minutes on day 29, thioguanine PO on days 29-42, cytarabine IV over 1-30 minutes or SC on days 29-32 and 36-39, methotrexate IT on days 29 and 36, vincristine IV or IV push over 1 minute on days 43 and 50, and pegaspargase or calaspargase pegol IV over 1-2 hours or pegaspargase IM on day 43. Treatment (Parts I and II of Delayed Intensification) continues for 9 weeks in the absence of disease progression or unacceptable toxicity. Calaspargase pegol can only be given to patients less than 22 years of age.

INTERIM MAINTENANCE II: Patients receive vincristine IV on days 1, 11, 21, 31, and 41, methotrexate IV or infusion over 2-15 minutes or 10-15 minutes on days 1, 11, 21, 31, and 41, methotrexate IT on days 1 and 31, and pegaspargase or calaspargase pegol IV over 1-2 hours on days 2 and 22 (pegaspargase) or (calaspargase) 23 or pegaspargase IM on days 2 and 22. Treatment continues for 8 weeks in the absence of disease progression or unacceptable toxicity. Calaspargase pegol can only be given to patients less than 22 years of age.

MAINTENANCE: Patients receive vincristine IV on days 1, prednisolone PO BID or IV on days 1-5, mercaptopurine PO on days 1-84, methotrexate PO on days 8, 15, 22, 29 (excluded in cycles 1 and 2), 36, 43, 50, 57, 64, 71, and 78, and methotrexate IT on days 1 (and 29 of cycles 1-2 for patients who do not receive cranial radiation). Cycles repeat every 12 weeks for up to 2 years in the absence of disease progression or unacceptable toxicity. Patients with CNS3 disease at diagnosis undergo cranial radiation therapy for 10 fractions over 4 weeks.

Patients undergo blood sample collection and bone marrow aspiration and biopsy on study. B-LLy patients undergo computed tomography (CT), magnetic resonance imaging (MRI), positron emission tomography (PET), and/or bone scan on study.

After completion of study treatment, patients are followed up at 4 weeks, then every 3 months for 2 years, every 4-6 months for the third year, then every 6-12 months for years 4-5.