Clinical trial · Interventional
An Open-Label Study of JZP-458 (RC-P) in Patients With Acute Lymphoblastic Leukemia (ALL)/Lymphoblastic Lymphoma (LBL)
An Open-Label, Multicenter Study of Recombinant Crisantaspase Produced in Pseudomonas Fluorescens (RC-P) in Patients With Acute Lymphoblastic Leukemia (ALL)/Lymphoblastic Lymphoma (LBL) Following Hypersensitivity to E. Coli-derived Asparaginases
NCT04145531CI-TRIAL-00071496completedPhase 2 / Phase 3Results postedClinicalTrials.gov clinicaltrialsProvenance
- Source
- ClinicalTrials.gov
- Retrieved
- Sep 8, 2026
- Layer
- normalized (units and labels harmonized; values unchanged)
- Run
- ING-CLINICALTRIALS-20260908-000001
Summary
Brief summary (as posted)
This is an open-label, multicenter, dose confirmation, and PK study of JZP-458 in patients (of any age) with ALL/LBL who are hypersensitive to E. coli-derived asparaginases (allergic reaction or silent inactivation). This study is designed to assess the tolerability and efficacy of JZP-458 (only in patients who develop hypersensitivity to an E. coli-derived asparaginase), as measured by asparaginase activity.
Conditions
Conditions (2)
Free-text conditions as registered, with the CancerIndex entity they were reconciled to and the match type.
| Condition (as posted) | Mapped entity | Match | Confidence |
|---|---|---|---|
| Acute Lymphoblastic Leukemia | Acute Lymphoblastic Leukemia | ONTOLOGY_EXACT | 0.98 |
| Lymphoblastic Leukemia | Acute Lymphoblastic Leukemia | ALIAS | 0.90 |
Interventions
Interventions (2)
| Intervention | Type | Mapped drug | Match |
|---|---|---|---|
| IM JZP-458 | Drug | — | UNRESOLVED |
| IV JZP-458 | Drug | — | UNRESOLVED |
Design
Arms and outcomes
Arms (1)
- type
- EXPERIMENTAL
- label
- JZP-458
- description
- Part A (IM JZP-458) of the study will have 2 IM cohorts: * Cohort 1: a JZP-458 repeat dose/confirmatory cohort; a final IM JZP-458 dose level will be selected, and * Cohort 2: an expansion cohort to confirm the efficacy and safety of the final IM JZP-458 dose level and schedule Part B (IV JZP-458 Dose Confirmation) will be conducted to define the optimal dose of the IV administration of JZP-458 for further study in ALL/LBL patients as a repeated dose. Additional courses of JZP-458 (IM or IV depending on patient's allocation at study enrollment) will be administered based on each patient's original treatment plan for as long as the patient derives clinical benefit.
- interventionNames
- Drug: IM JZP-458
- Drug: IV JZP-458
Primary outcomes (2)
- measure
- Response Rate During the First Course of JZP-458 Administration
- timeFrame
- Baseline up to 2 weeks
- description
- The response rate was defined as the number (proportion) of patients with the last 72-hour nadir serum asparaginase activity (NSAA) level ≥ 0.1 IU/mL during the first course of IM JZP-458. Blood samples were collected for serum asparaginase activity level determination.
Eligibility
Eligibility (as posted)
- Sex
- All
Show eligibility criteria text
Inclusion Criteria: 1. Pediatric and adult patients with a diagnosis of ALL or LBL. 2. Have had an allergic reaction to a long-acting E. coli-derived asparaginase OR have silent inactivation. 3. Have 1 or more courses of E. coli-derived asparaginase remaining in his/her treatment plan. 4. Patients must have, in the opinion of the Investigator, fully recovered from their prior allergic reaction to E. coli-derived asparaginase. Exclusion Criteria: 1. Have previously received asparaginase Erwinia chrysanthemi or JZP-458. 2. Have relapsed ALL or LBL. 3. Are concurrently receiving another investigational agent and/or treated with an investigational device at the same time as JZP-458 (within 48 hours) during Course 1 of JZP-458. 4. Have a history of ≥ Grade 3 pancreatitis. 5. Prior history of asparaginase-associated ≥ Grade 3 hemorrhagic event or asparaginase-associated thrombus requiring anticoagulation therapy, excluding catheter-related thrombotic events.
References
Publications (2)
- RESULTMaese L, Loh ML, Choi MR, Lin T, Aoki E, Zanette M, Agarwal S, Iannone R, Silverman JA, Silverman LB, Raetz EA, Rau RE. Recombinant Erwinia asparaginase (JZP458) in acute lymphoblastic leukemia: results from the phase 2/3 AALL1931 study. Blood. 2023 Feb 16;141(7):704-712. doi: 10.1182/blood.2022016923. PMID 36108304
- DERIVEDMaese L, Loh ML, Choi MR, Agarwal S, Aoki E, Liang Y, Lin T, Girgis S, Chen C, Roller S, Chandrasekaran V, Iannone R, Silverman LB, Raetz EA, Rau RE. Recombinant Erwinia asparaginase (JZP458) in ALL/LBL: complete follow-up of the Children's Oncology Group AALL1931 study. Blood Adv. 2025 Jan 14;9(1):66-77. doi: 10.1182/bloodadvances.2024013346. PMID 39454281