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IDE849

Phase 1

Small-cell Lung Cancer | Small molecule | Oncology |IDEAYA Biosciences, Inc.|Last Updated: Jul 9, 2026

Target and mechanism

Molecular targetDLL3
ModalitySmall molecule

Success Probability

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Market & Valuation

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Trial Design

CONTROLLEDDMC
Total Trials1
Total Enrollment262

FDA Designations

No designations recorded

Clinical trial landscape

IDE849 · 1 trial · 3 indications

Phase 1 1
NCT07174583A Study of IDE849 in Patients With DLL3 Expressing Tumors Including Small Cell Lung CancerSmall-cell Lung Cancer
RECRUITING262 Analytics
PHASE1RECRUITING
A Study of IDE849 in Patients With DLL3 Expressing Tumors Including Small Cell Lung Cancer
Small-cell Lung CancerUnlock trial analytics

Study Endpoints

Primary Endpoints

Part 1A: Safety and Tolerability of IDE849 (Monotherapy)
approximately 4 years total study duration

Incidence of dose-limiting toxicities, incidence and severity AEs and SAEs as measured by CTCAE V5.0.

Part 1B: Safety and Tolerability of IDE849 in Combination with durvalumab or IDE161
approximately 4 years total study duration

Incidence of dose-limiting toxicities, incidence and severity AEs and SAEs as measured by CTCAE V5.0.

Part 2: Safety and Tolerability of IDE849 (Monotherapy Dose Expansion)
approximately 4 years total study duration

Incidence and severity and relationship of AEs and SAEs as measured by CTCAE V5.0

Part 2: Safety and Tolerability of IDE849 in Combination with durvalumab or IDE161 or durvalumab + carboplatin (Dose Expansion)
approximately 4 years total study duration

Incidence and severity and relationship of AEs and SAEs graded as measured by CTCAE V 5.0.

Part 2: Objective Response Rate (ORR) and Investigator Assessment of IDE849 ORR per RECIST 1.1
approximately 4 years total study duration

ORR per RECIST v1.1, defined as the proportion of subjects with a Complete Response (CR) or Partial Response (PR) as assessed by the Investigator.

Part 2: Duration of Response (DOR) and Investigator Assessment of IDE849 DOR per RECIST 1.1
approximately 4 years total study duration

DOR per RECIST v1.1, defined as the time from the first documented Complete Response (CR) or Partial Response (PR) to disease progression or death, whichever occurs first, as assessed by the Investigator.

Secondary Endpoints

Part 1 and Part 2: Disease Control Rate (DCR) and Investigator Assessment of IDE849 DCR per RECIST 1.
approximately 4 years total study duration
Part 2: Progression-Free Survival (PFS) PFS per RECIST1.1 PFS per RECIST1.1.
approximately 4 years total study duration
Part 2: Overall Survival (OS)
approximately 4 years total study duration
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Study Design & Arms

AllocationNON_RANDOMIZED
MaskingNONE
ModelPARALLEL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
Part 1A IDE849 Monotherapy (Dose Escalation)EXPERIMENTALSuccessive cohorts of participants will be treated with escalating doses of IDE849 until the maximum tolerated dose and dose for expansion are determined
Part 1B IDE849 + durvalumab, or IDE849 + durvalumab + carboplatin (Dose Escalation)EXPERIMENTALMultiple doses of IDE849 will be tested in combination with durvalumab or in combination with durvalumab + carboplatin to identify the optimal combination dose.
Part 1B IDE849 + IDE161 (Dose Escalation)EXPERIMENTALMultiple doses of IDE849 will be tested in combination with IDE161 to identify the optimal combination dose.
Part 2 IDE849 Monotherapy RDE 1 for SCLC (Dose Expansion)EXPERIMENTALChosen monotherapy doses of IDE849 will be tested in additional participants.
Part 2 IDE849 Monotherapy RDE 2 for SCLC (Dose Expansion)EXPERIMENTALChosen monotherapy doses of IDE849 will be tested in additional participants
Part 2 IDE849 Monotherapy for NEC (Dose Expansion)EXPERIMENTALChosen monotherapy doses of IDE849 will be tested in additional participants.
Part 2 IDE849 + durvalumab (Dose Expansion)EXPERIMENTALChosen combination dose of IDE849 + durvalumab will be tested in additional participants.
Part 2 IDE849 + durvalumab + carboplatin (Dose Expansion)EXPERIMENTALChosen combination dose of IDE849 + durvalumab + carboplatin will be tested in additional participants.
Part 2 IDE849 + IDE161 (Dose Expansion)EXPERIMENTALChosen combination dose of IDE849 + IDE161 will be testing in additional participants

Interventions

NameTypeDescription
IDE849DRUGIV administration
durvalumabDRUGIV administration
IDE161DRUGoral administration
CarboplatinDRUGIV administration
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Eligibility Criteria

Age Range18 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites13

Inclusion Criteria: 1. Are willing to participate in this clinical study, understand the study procedures, and are able to sign the written ICF. 2. Subjects with histologically or cytologically confirmed ES- SCLC, neuroendocrine carcinoma (NEC), DLL3+ solid tumors, are eligible per protocol. Subjec...

Countries:United States
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Competitive Landscape -Non-Small Cell Lung Cancer 389 trials (matched to "Small-cell Lung Cancer")

Recent Changes (Last 90 Days)

MEDIUMJul 9, 2026NCT07174583Enrollment: 208 → 262
MEDIUMJul 9, 2026NCT07174583Enrollment: 208 → 262

Frequently asked questions about IDE849

What is IDE849 used for?

IDE849 is an investigational small molecule being developed for the treatment of small-cell lung cancer and other DLL3-expressing tumors, including neuroendocrine carcinomas and solid tumors. It is currently in Phase 1 clinical development and is not yet approved by the FDA.

What does IDE849 target?

IDE849 targets DLL3, a protein expressed on the surface of certain tumor cells, including those in small-cell lung cancer. By targeting DLL3, the drug aims to interfere with tumor growth in cancers that express this protein.

Who is developing IDE849?

IDE849 is being developed by IDEAYA Biosciences, Inc., a biopharmaceutical company traded on the NASDAQ under the ticker symbol IDYA. The company is conducting clinical trials to evaluate the drug's safety and efficacy in patients with DLL3-expressing tumors.

What phase is IDE849 in?

IDE849 is in Phase 1 clinical development. It is an investigational drug, meaning it has not received FDA approval and is still being studied in clinical trials to assess its safety, tolerability, and potential efficacy in patients with DLL3-expressing tumors.

What clinical trials is IDE849 in?

IDE849 is being studied in a Phase 1 clinical trial with the identifier NCT07174583. This trial is recruiting patients with DLL3-expressing tumors, including small-cell lung cancer, neuroendocrine carcinomas, and solid tumors, and is being conducted in the United States.

Is IDE849 the same as other DLL3-targeting drugs?

IDE849 is a distinct investigational small molecule that targets DLL3. While other drugs may also target DLL3, IDE849 is a separate asset developed by IDEAYA Biosciences. It is currently in early-stage clinical trials and has not been compared directly to other DLL3-targeting therapies in published data.