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asparaginase Erwinia chrysanthemi

Phase 2

Acute Lymphoblastic Leukemia | Small molecule | Oncology |Jazz Pharmaceuticals plc|Trials Updated: Apr 8, 2026

asparaginase Erwinia chrysanthemi development status

Highest phase Phase 2
Registered trials 4 across 4 sponsors since Jul 2012

asparaginase Erwinia chrysanthemi target and mechanism

ModalitySmall molecule

Also known as Asparaginase Erwinia chrysanthemi (Recombinant)-rywn, Asparaginase Erwinia chrysanthemi-rywn, Crisantaspase, Crisantaspase Biobetter JZP-458, Crisantaspasum, Enrylaze, Erwinase, Erwinaze

Success Probability

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Market & Valuation

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Trial Design

UNCONTROLLEDDMC
Total Trials2
Total Enrollment60

FDA Designations

No designations recorded

asparaginase Erwinia chrysanthemi clinical trials

asparaginase Erwinia chrysanthemi · 2 trials · 4 indications

Phase 2 2
NCT06738368Etoposide, Prednisone, Vincristine, Cyclophosphamide, and Doxorubicin (DA-EPOCH) With or Without Rituximab Plus Recombinant Erwinia Asparaginase (JZP458) for the Treatment of Newly Diagnosed Ph Negative B-Acute Lymphoblastic Leukemia or T Acute Lymphoblastic LeukemiaB Acute Lymphoblastic Leukemia, Philadelphia Chromosome Negative
RECRUITING30 Analytics
NCT01643408A Study of Erwinaze Administered Intravenously in Patients Who Had an Allergy to Frontline Asparaginase TherapyAcute Lymphoblastic Leukemia
COMPLETED30 Analytics
PHASE2RECRUITING
Etoposide, Prednisone, Vincristine, Cyclophosphamide, and Doxorubicin (DA-EPOCH) With or Without Rituximab Plus Recombinant Erwinia Asparaginase (JZP458) for the Treatment of Newly Diagnosed Ph Negative B-Acute Lymphoblastic Leukemia or T Acute Lymphoblastic Leukemia
B Acute Lymphoblastic Leukemia, Philadelphia Chromosome NegativeUnlock trial analytics
PHASE2COMPLETED
A Study of Erwinaze Administered Intravenously in Patients Who Had an Allergy to Frontline Asparaginase Therapy
Acute Lymphoblastic LeukemiaUnlock trial analytics

Study Endpoints

Primary Endpoints

Measurable residual disease (MRD) negativity
After 4 cycles of treatment (cycle length = 21 days)

Will be measured by multi-parameter flow cytometry (MFC). Will be assessed according to the National Comprehensive Cancer Network response criteria.

Two Day Nadir Serum Asparaginase Activity (NSAA) Level
48 hours post-dose 5

To report the mean 2 day NSAA levels (48 hour levels taken after the 5th dose) that are \> or = 0.1 IU/mL during the first 2 weeks of treatment with 3-times per week intravenous dosing of Erwinase at 25,000 IU/m2/dose.

Secondary Endpoints

MRD negativity
After 1 cycle of study therapy (cycle length = 21 days)
Incidence of grade 3 or higher non-hematologic adverse events (AEs)
Up to 30 days after last dose of study treatment
Event-free survival (EFS)
Up to 5 years
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Study Design & Arms

AllocationNA
MaskingNONE
ModelSINGLE_GROUP
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
Treatment (DA-EPOCH, rituximab, JZP458)EXPERIMENTALPatients receive etoposide IV, doxorubicin IV and vincristine IV over 96 hours on days 1-4, cyclophosphamide IV over 1 hour on day 5, prednisone PO BID on days 1-5 of each cycle. In addition, CD20 positive patients receive rituximab IV on day 1 or 5 of each cycle. Patients also receive JZP458 IM every 2-3 days on days 7-21 for up to 7 doses. Cycles repeat every 21 days for up to 8 cycles in the absence of disease progression or unacceptable toxicity. Starting on day 6, 7, or 8, patients also receive pegfilgrastim SC once or filgrastim SC QD until ANC \> 2000/uL past nadir. Patients also undergo blood sample collection and bone marrow collection throughout the study. Additionally, patients with extramedullary disease may undergo CT or PET/CT throughout the study.
Open-Label ErwinazeEXPERIMENTAL -

Interventions

NameTypeDescription
Asparaginase Erwinia chrysanthemiDRUGGiven IM
Biospecimen CollectionPROCEDUREUndergo blood sample collection
Bone Marrow CollectionPROCEDUREUndergo bone marrow sample collection
Computed TomographyPROCEDUREUndergo CT or PET/CT
CyclophosphamideDRUGGiven IV
DoxorubicinDRUGGiven CIV
EtoposideDRUGGiven CIV
FilgrastimBIOLOGICALGiven SC
PegfilgrastimBIOLOGICALGiven SC
Positron Emission TomographyPROCEDUREUndergo PET/CT
PrednisoneDRUGGiven PO
RituximabBIOLOGICALGiven IV
VincristineDRUGGiven CIV
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Eligibility Criteria

Age Range18 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites1

Inclusion Criteria: * Adults (age 18 years and older) with newly-diagnosed Ph- B-ALL or T-ALL * In the opinion of the treating investigator, patients must be an unsuitable candidate for a pediatric-inspired regimen, reasons for which may include (but not be limited to) older age (e.g., ≥ 40 years),...

Countries:United StatesCanada
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Frequently asked questions about asparaginase Erwinia chrysanthemi

What is Asparaginase Erwinia chrysanthemi used for?

Asparaginase Erwinia chrysanthemi is used for Acute Lymphoblastic Leukemia, including B Acute Lymphoblastic Leukemia and Philadelphia Chromosome Negative subtypes. It is being studied in patients with these conditions, and one trial also includes Lymphoblastic Lymphoma. The drug is in Phase 2 clinical development for these oncology indications.

What does Asparaginase Erwinia chrysanthemi target?

Asparaginase Erwinia chrysanthemi is an enzyme that targets asparagine, an amino acid required for leukemia cell growth. By breaking down asparagine, the drug deprives cancer cells of a nutrient they need, which is the basis of its mechanism in treating Acute Lymphoblastic Leukemia.

Who makes Asparaginase Erwinia chrysanthemi?

Asparaginase Erwinia chrysanthemi is developed by Jazz Pharmaceuticals plc, a biopharmaceutical company traded on the stock exchange under the ticker JAZZ. The company is conducting clinical trials to evaluate the drug for the treatment of Acute Lymphoblastic Leukemia.

What phase is Asparaginase Erwinia chrysanthemi in?

Asparaginase Erwinia chrysanthemi is in Phase 2 clinical development. It is an investigational drug and has not been approved by regulatory authorities. Two Phase 2 trials are listed, one completed and one currently recruiting patients, both studying the drug in leukemia indications.

What clinical trials is Asparaginase Erwinia chrysanthemi in?

Asparaginase Erwinia chrysanthemi is being studied in two Phase 2 trials. NCT01643408, a completed study, evaluated the drug given intravenously in patients allergic to frontline asparaginase therapy. NCT06738368, currently recruiting, combines the drug with a chemotherapy regimen for newly diagnosed B or T Acute Lymphoblastic Leukemia.

Is Asparaginase Erwinia chrysanthemi the same as Erwinaze?

Asparaginase Erwinia chrysanthemi is also known as Erwinaze, as referenced in the clinical trial title for NCT01643408. The drug is sometimes called recombinant Erwinia asparaginase, and the trial NCT06738368 uses the code name JZP458 for a recombinant form of the enzyme.