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DAY101

Phase 1

Low-grade Glioma | Small molecule | Oncology |Day One Biopharmaceuticals, Inc.|Last Updated: Feb 19, 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
CONTROLLEDDMCBiomarker
Total Trials1
Total Enrollment44
FDA Designations
No designations recorded
Clinical Trials (1)
NCT IDTitlePhaseStatusEnrollmentVelocityDesignStartCompletionLast UpdatedSitesCountries
NCT03429803DAY101 In Gliomas and Other TumorsPHASE1 COMPLETED 44Feb 27, 2018Dec 31, 2025Feb 19, 202615 United States
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Study Endpoints
Primary Endpoints
Dose Limiting Toxicity (DLT)
Greater and equal 28 days

A DLT is defined as an AE assessed as at least possibly related to the study medication, which occurs during Cycle 1 (typically 28 days following the first dose of DAY101)

Secondary Endpoints
Blood samples for DAY101 concentration measurements (i.e. pharmacokinetic measures)
cycle 1 day 1 1-4 hours post dose; cycle 1 day 3-6 random level; cycle 2 day 1 pre-dose; cycle 3 day 1 random level; end of therapy or at time of toxicity requiring patient be taken off study or dose held; time of surgery if applicable)
Best Overall Response
48 Weeks
Number of participants with adverse events
48 Weeks
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Study Design & Arms
AllocationNON_RANDOMIZED
MaskingNONE
ModelPARALLEL
PurposeTREATMENT
Treatment Arms
ArmTypeDescription
DAY101 (formerly TAK-580, MLN2480) BSA </= 1.5m^2EXPERIMENTALPhase I Part B BSA \</= 1.5m\^2 * Patients (\< 25 years) with radiographically recurrent or radiographically progressive non-hematologic malignancies (Central Nervous System (CNS) or solid tumors) associated with activation of the RAS/RAF/MEK/ERK pathway will be eligible with the exception of patients with NF1 * Study treatment cycle lasts 28 days, oral, once a week
DAY101 (formerly TAK-580, MLN2480) BSA > 1.5m^2EXPERIMENTALPhase I Part B BSA \> 1.5m\^2 * Patients (\< 25 years) with radiographically recurrent or radiographically progressive non-hematologic malignancies (Central Nervous System (CNS) or solid tumors) associated with activation of the RAS/RAF/MEK/ERK pathway will be eligible with the exception of patients with NF1 * Study treatment cycle lasts 28 days, oral, once a week
Interventions
NameTypeDescription
DAY101DRUG28 day cycle, oral, once per week
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Eligibility Criteria
Age Range1 Year — 25 Years
SexALL
Healthy VolunteersNo
Study Sites15

Inclusion Criteria: * Participants must meet the following criteria on screening examination to be eligible to participate in the study: * Phase I * Pediatric patients with radiographically recurrent or radiographically progressive non-hematologic malignancies (Central Nervous System (CNS) ...

Countries:United States
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