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DAY101

Phase 1

Low-grade Glioma | Small molecule | Oncology |Day One Biopharmaceuticals, Inc.|Last Updated: Feb 19, 2026

Success Probability

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Market & Valuation

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Trial Design

CONTROLLEDDMCBiomarker
Total Trials1
Total Enrollment44

FDA Designations

No designations recorded

Clinical trial landscape

DAY101 · 1 trial · 1 indication

Phase 1 1
NCT03429803DAY101 In Gliomas and Other TumorsLow-grade Glioma
COMPLETED44 Analytics
PHASE1COMPLETED
DAY101 In Gliomas and Other Tumors
Low-grade GliomaUnlock trial analytics

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 to 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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Frequently asked questions about DAY101

What is DAY101 used for?

DAY101 is an investigational small molecule being studied for the treatment of low-grade glioma, a type of brain tumor. It is currently in clinical development for this oncology indication.

What does DAY101 target?

DAY101 is a small molecule designed to target specific molecular pathways involved in tumor growth. It is being evaluated in biomarker-selected patients with low-grade glioma, indicating that its activity is linked to particular genetic alterations.

Who makes DAY101?

DAY101 is being developed by Day One Biopharmaceuticals, Inc., a company traded under the ticker symbol DAWN. The company is focused on advancing this investigational therapy for patients with low-grade glioma.

What phase is DAY101 in?

DAY101 is in Phase 1 clinical development. It is an investigational drug, meaning it has not been approved by regulatory authorities and is still undergoing clinical trials to evaluate its safety and efficacy.

What clinical trials is DAY101 in?

DAY101 has been studied in a Phase 1 clinical trial with the identifier NCT03429803, titled 'DAY101 In Gliomas and Other Tumors.' This trial, which enrolled 44 participants with low-grade glioma, has been completed.

Is DAY101 the same as any other drug?

DAY101 is the primary name for this investigational drug. No alternative names have been established for it in the available information.