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Dexamethasone

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Inotuzumab Ozogamicin

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Asparaginase

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Immunologic Factors

Each participant in the InO arm will receive 1 course (3 doses) of InO, as follows:

* Day 1: 0.8 mg/m2
* Days 8 (±1 day) and Day 15 (±1 day): 0.5 mg/m2/dose

Mitoxantrone 10 mg/m2 on Days 1 and 2 Vincristine 1.5 mg/m2 (max single dose 2 mg) administered on Days 3, 10, 17 and 24 Dexamethasone 20 mg/m2/day administered orally (or IV) divided into two daily doses (maximum 40 mg/day) as two 5-day blocks on Days 1-5 and Days 15-19.

PEG-asparaginase 1000 units/m2 IV administered on Days 3 and 17

Inotuzumab ozogamicin (BESPONSA™) is a CD22 targeted antibody drug conjugate (ADC) approved in several countries for the treatment of adults with relapsed or refractory B cell precursor acute lymphoblastic leukemia (ALL). The approved starting dose is 1.8mg/m2/cycle.

Inotuzumab ozogamicin

The ALLR3 chemotherapy regimen (vincristine, mitoxantrone, dexamethasone, and asparaginase) has been adopted by pediatric oncology groups as treatment for pediatric relapsed/refractory (R/R) acute lymphoblastic leukemia (ALL)

ALLR3

Pfizer CT.gov Call Center

This prospective, randomized, multicenter, open-label Phase 2 study is designed to evaluate the superiority of InO monotherapy vs ALLR3 after 1 cycle of induction treatment in paediatric participants (between 1 and \<18 years) with High Risk (HR) first bone marrow relapse CD22-positive BCP ALL, and to evaluate the safety and tolerability, PK and long-term efficacy. Treatment with study intervention will end after induction therapy; follow-up will continue for up to 5 years from randomization.

This prospective, randomized, multicenter, open-label, Phase 2 study is designed to evaluate the superiority of InO monotherapy vs ALLR3, after 1 cycle of induction treatment in paediatric participants (between 1 and \<18 years) with HR first bone marrow relapse CD22-positive BCP ALL, and to evaluate the safety and tolerability, PK and long-term efficacy. Treatment with study intervention will end after induction therapy; follow-up for efficacy and safety will continue for up to 5 years from randomization.

End of Treatment is defined as occurring upon recovery from 1 cycle of study therapy (Day 28 ± 2 days), or one day before initiation of new anticancer therapy, whichever occurs first.

Approximately 100 participants will be randomized (2:1) to receive 1 cycle of either InO monotherapy or ALLR3 (block 1) therapy during induction.

After completion of induction therapy (ie, study therapy), it is anticipated that the majority of responding participants will proceed immediately to consolidation therapy. Non-responders are expected to proceed with salvage therapy at the investigator's discretion. Participants responding to induction therapy are expected to proceed to SOC consolidation therapy upon recovery of blood counts, but no sooner than 7 days after last dose of study intervention.

All participants (responders and non-responders) will proceed to long-term follow-up for this study. All subsequent anticancer therapy will be determined by the treating physician.

Participants will be randomized at 2:1 ratio, so that approximately 67 participants will receive InO and 33 participants will receive the comparator treatment regimen, ALLR3

A Study to Learn More About the Study Medicine Called Inotuzumab Ozogamicin (InO) in Children (1 to <18 Years) With First Relapse ALL

A PROSPECTIVE, RANDOMIZED, OPEN-LABEL PHASE 2 STUDY TO EVALUATE THE SUPERIORITY OF INOTUZUMAB OZOGAMICIN MONOTHERAPY VERSUS ALLR3 FOR INDUCTION TREATMENT OF CHILDHOOD HIGH RISK FIRST RELAPSE B-CELL PRECURSOR ACUTE LYMPHOBLASTIC LEUKAEMIA

Pfizer will provide access to individual de-identified participant data and related study documents (e.g. protocol, Statistical Analysis Plan (SAP), Clinical Study Report (CSR)) upon request from qualified researchers, and subject to certain criteria, conditions, and exceptions. Further details on Pfizer's data sharing criteria and process for requesting access can be found at: https://www.pfizer.com/science/clinical_trials/trial_data_and_results/data_requests.

MRD negativity status is determined based on the minimum MRD percentage between the date of CR/CRp/CRi and end of treatment test as assessed by RQ-PCR, with reflex to FC result if MRD is non-evaluable by RQ-PCR

EFS will be summarized using Kaplan-Meier methods and displayed graphically by treatment arm.

DoR will be summarized using Kaplan-Meier methods.

HSCT rate will be summarized by descriptive analyses (ie, percentage of participants who underwent HSCT after treatment).

OS will be summarized by treatment arm using Kaplan-Meier methods.

The number and percentage of participants who experienced any AE, SAE (Serious Adverse Event), treatment related AE, and treatment related SAE will be summarized according to worst toxicity grades.

Descriptive summary statistics will be provided for InO serum concentrations at scheduled visits.

AEs will be graded by the investigator according to the CTCAE (Common Terminology Criteria for Adverse Events) version 4.03.

CAR T-cell therapy rate will be summarized by descriptive analyses (ie, the number, percent of participants who underwent CAR T-cell therapy after treatment).

Spots Global Cancer Trial Database for relapse all

Every month we try and update this database with for relapse all cancer trials from around the world to help patients and their families find trials that might be right for them.
We offer this 100% free of charge and do not endorse any of the trials listed here, we hope it helps you or a loved one.

Spots Global Cancer Trial Database for relapse all

Every month we try and update this database with for relapse all cancer trials from around the world to help patients and their families find trials that might be right for them. We offer this 100% free of charge and do not endorse any of the trials listed here, we hope it helps you or a loved one.

Every month we try and update this database with for relapse all cancer trials from around the world to help patients and their families find trials that might be right for them.
We offer this 100% free of charge and do not endorse any of the trials listed here, we hope it helps you or a loved one.