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Calaspargase Pegol

Phase 1

Acute Lymphoblastic Leukemia | Small molecule | Oncology |Tango Therapeutics, Inc.|Last Updated: Mar 6, 2026

Success Probability
Approval Probability 71%
TA Base Rate26%
Adjusted LOA41%
ML RiskLOW_RISK
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Market & Valuation
rNPV $3.2B
Market Size $9.4B
Revenue Basis $1.6B
Competitors 6
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Trial Design
UNCONTROLLEDDMCBiomarker
Total Trials1
Total Enrollment7
FDA Designations
No designations recorded
Clinical Trials (1)
NCT IDTitlePhaseStatusEnrollmentVelocityDesignStartCompletionLast UpdatedSitesCountries
NCT05581030CalPeg for Newly Diagnosed Acute Lymphoblastic Leukemia (ALL)PHASE1 RECRUITING 7May 1, 2023Oct 1, 2026Mar 6, 20261 United States
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Study Endpoints
Primary Endpoints
Mortality Rate of Hyper-CVAD after first infusion of calaspargase pegol
Up to 12 months

Mortality rate is hypothesized to be less than 10% when combining calaspargase pegol with Hyper-CVAD.

Secondary Endpoints
Minimal Residual Disease Remission Rate
Up to 3 years
Progression Free Survival
Up to 42 months
Overall Survival
Up to 42 months
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Study Design & Arms
AllocationNA
MaskingNONE
ModelSINGLE_GROUP
PurposeTREATMENT
Treatment Arms
ArmTypeDescription
Hyper-CVAD + Calaspargase pegol TreatmentEXPERIMENTALParticipants will receive calaspargase pegol administered over 1 hour with each cycle of Hyper-CVAD, mini-CVD, and late intensification, beginning with Cycle 1B. Responding patients will have dose reduction of HyperCVAD for Cycles 2B-4B. Participants with CD20+ ALL will also be given Rituximab once per cycle.
Interventions
NameTypeDescription
Hyper CVAD Protocol (Standard of Care Multi-Agent Chemotherapy)DRUGHyper-CVAD consists of two combinations of drugs (courses A and B) given in an alternating fashion. The term "hyper" refers to the hyperfractionated nature of the chemotherapy, which is given in small doses, more frequently, to minimize side effects. CVAD is the acronym of the drugs in course a: cyclophosphamide, vincristine, doxorubicin and dexamethasone. Course A: Cyclophosphamide days 1, 2 and 3. Vincristine days 4 and 11, Doxorubicin day 4, dexamethasone days 1-4 and 11-14, Cytarabine day 7. Mesna is also given orally with cyclophosphamide, to reduce the incidence of haemorrhagic cystitis, a common side effect of cyclophosphamide. Methotrexate, an antimetabolite, may be given when necessary to get chemotherapy past the blood brain barrier. Course B: Methotrexate Day 1 and Cytarabine Days 2 and 3. Dosage is individualized to the patient.
Calaspargase PegolDRUGCalaspargase pegol 2000 IU/m\^2 (capped at 3750 IU) will be administered beginning in cycle 1B of Hyper-CVAD, and will continue at this dose for the duration of the trial.
RituximabDRUGRituximab 375mg/m\^2 will be administered once per cycle for patients with CD20+ ALL.
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Eligibility Criteria
Age Range18 Years — 50 Years
SexALL
Healthy VolunteersNo
Study Sites1

Inclusion Criteria: * Pathologically confirmed Philadelphia negative B- or T-cell acute lymphoblastic leukemia, with \>10% peripheral blood or bone marrow lymphoblasts at diagnosis. * Treatment and full recovery from arm 1A of the Hyper-CVAD regimen. * Be willing and able to provide written informe...

Countries:United States
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Recent Changes (Last 90 Days)
LOWMay 24, 2026NCT05581030studyFirstPostDate: changed