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Emi-Le

Phase 1

Triple Negative Breast Cancer | Small molecule | Oncology |Day One Biopharmaceuticals, Inc.|Last Updated: Jun 29, 2026

Success Probability

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Market & Valuation

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Trial Design

UNCONTROLLED
Total Trials1
Total Enrollment360

FDA Designations

No designations recorded

Clinical trial landscape

Emi-Le · 1 trial · 7 indications

Phase 1 1
NCT05377996A Study of Emiltatug Ledadotin (Emi-Le) in Participants With Solid TumorsTriple Negative Breast Cancer
RECRUITING360 Analytics
PHASE1RECRUITING
A Study of Emiltatug Ledadotin (Emi-Le) in Participants With Solid Tumors
Triple Negative Breast CancerUnlock trial analytics

Study Endpoints

Primary Endpoints

Frequency of adverse events that are considered dose-limiting toxicities (DLTs) and associated with Emi-Le during the first cycle of treatment (Dose Escalation)
17 months

Determine the maximum tolerated dose (MTD) and recommended Phase 2 dose (RP2D) of Emi-Le

Incidence of adverse events (Dose Escalation and Dose Expansion)
3 years

Assess the safety and tolerability of Emi-Le by determining the number of patients with adverse events from date of first dose to 60 days post last dose

Objective Response Rate (ORR) (Dose Expansion and EMBLEM-1)
approximately 3 years

The percentage of patients with a best overall response of complete or partial response as assessed by the investigator per Response Evaluation Criteria in Solid Tumors (RECIST) version 1.1

Secondary Endpoints

Objective Response Rate (ORR) (Dose Escalation)
Up to approximately 3 years
Duration of response (DOR) (Dose Escalation, Dose Expansion, and EMBLEM-1)
Up to approximately 3 years
Maximum observed plasma concentration of Emi-Le and payload (Cmax) (Dose Escalation and Dose Expansion)
Up to approximately 3 years
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Study Design & Arms

AllocationNA
MaskingNONE
ModelSINGLE_GROUP
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
Emi-LeEXPERIMENTALSingle arm Emi-Le alone (monotherapy)

Interventions

NameTypeDescription
Emi-LeDRUGEmi-Le will be administered through a vein in your arm or port catheter (intravenously)
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Eligibility Criteria

Age Range18 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites26

Inclusion Criteria: * Recurrent or advanced solid tumor and has disease * Eastern Cooperative Oncology Group (ECOG) performance status 0 or 1 * Participants in DES must have at least one measurable disease (target) lesion as defined by RECIST version 1.1. * Tumor tissue, either archival or from a f...

Countries:United States
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Recent Changes (Last 90 Days)

MEDIUMJun 29, 2026NCT05377996Enrollment: 319 → 360
MEDIUMJun 29, 2026NCT05377996Enrollment: 319 → 360

Frequently asked questions about Emi-Le

What is Emi-Le used for?

Emi-Le, also known as Emiltatug Ledadotin, is an investigational small molecule being studied for the treatment of solid tumors, including Triple Negative Breast Cancer. It is currently in Phase 1 clinical development and has not been approved by the FDA.

What does Emi-Le target?

The molecular target of Emi-Le has not been disclosed in available information. It is a small molecule being evaluated for its potential antitumor activity in solid tumors, including Triple Negative Breast Cancer.

Who makes Emi-Le?

Emi-Le is being developed by Day One Biopharmaceuticals, Inc., a company publicly traded under the ticker symbol DAWN. The company is conducting clinical trials to evaluate the safety and efficacy of this investigational drug.

What phase is Emi-Le in?

Emi-Le is currently in Phase 1 clinical development. It is an investigational drug and has not yet received FDA approval. The ongoing trial is recruiting participants to assess its safety and preliminary efficacy in solid tumors.

What clinical trials is Emi-Le in?

Emi-Le is being studied in a Phase 1 clinical trial with the identifier NCT05377996, titled 'A Study of Emiltatug Ledadotin (Emi-Le) in Participants With Solid Tumors.' This trial is recruiting participants in the United States and has an estimated enrollment of 360 patients.

Is Emi-Le the same as Emiltatug Ledadotin?

Yes, Emi-Le is the same as Emiltatug Ledadotin. Emi-Le is a shortened name used for the drug, while Emiltatug Ledadotin is the full name. Both refer to the same investigational small molecule being developed for solid tumors.