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IDE-161

Phase 1

Advanced or Metastatic Solid Tumors | Small molecule | Oncology |IDEAYA Biosciences, Inc.|Last Updated: Jul 13, 2026

Target and mechanism

Molecular targetB7H3
ModalitySmall molecule

Also known as IDE161

Success Probability

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Market & Valuation

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Trial Design

CONTROLLEDDMC
Total Trials1
Total Enrollment216

FDA Designations

FAST_TRACK

Clinical trial landscape

IDE-161 · 1 trial · 9 indications

Phase 1 1
NCT05787587A Study of PARG Inhibitor IDE161 in Participants With Advanced Solid TumorsAdvanced or Metastatic Solid Tumors
ACTIVE NOT_RECRUITING216 Analytics
PHASE1ACTIVE NOT_RECRUITING
A Study of PARG Inhibitor IDE161 in Participants With Advanced Solid Tumors
Advanced or Metastatic Solid TumorsUnlock trial analytics

Study Endpoints

Primary Endpoints

Part 1 (Dose Escalation): To characterize the safety and tolerability of IDE161 monotherapy or in combination with pembrolizumab to determine the MTD and/or RDE
Approximately 2 years

* Incidence of Dose Limiting Toxicities * Incidence of treatment-emergent Adverse Events as characterized by type, frequency, severity (as graded by NCI CTCAE version 5.0), timing, seriousness, and relationship to study therapy * Laboratory abnormalities as characterized by type, frequency, severity (as graded by NCI CTCAE version 5.0), and timing

Part 2 (Dose Expansion): To further assess the safety and tolerability of IDE monotherapy and in combination with pembrolizumab at the RDE
Approximately 4 years

* Incidence of treatment-emergent AEs as characterized by type, frequency, severity (as graded by NCI CTCAE version 5.0), timing, seriousness, and relationship to study therapy * Laboratory abnormalities as characterized by type, frequency, severity (as graded by NCI CTCAE v5.0), and timing

Part 2 (Dose Expansion): To evaluate preliminary anti-tumor activity of IDE161 monotherapy or in combination with pembrolizumab
Approximately 4 years

Tumor response: Overall Response Rate assessed using RECIST criteria v1.1

Secondary Endpoints

Part 2 (Dose Expansion) Assess the risk/benefit at an IDE161 monotherapy dose and exposure alternative to the initial expansion dose; as well as an IDE161 dose in combination with a fixed dose of pembrolizumab and exposure alternative to the initial
Approximately 4 years
To characterize the single dose PK Peak Plasma Concentration (Cmax) of IDE161 monotherapy and in combination with pembrolizumab.
Approximately 4 years
To characterize the multiple dose PK Peak Plasma Concentration (Cmax) of IDE161 monotherapy and in combination with pembrolizumab.
Approximately 4 years
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Study Design & Arms

AllocationNON_RANDOMIZED
MaskingNONE
ModelSEQUENTIAL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
Module 1 Part 1: Monotherapy Dose EscalationEXPERIMENTALParticipants will be assigned to a dose level.
Module 1 Part 2: Monotherapy Dose ExpansionEXPERIMENTALAfter a dose is decided in Part 1, participants entering part 2 will be assigned to a dose level.
Module 2 Part 1: Combination Dose Escalation with pembrolizumabEXPERIMENTALParticipants will be assigned to a dose level.
Module 2 Part 2: Combination Dose Expansion with pembrolizumabEXPERIMENTALAfter a dose is decided in Part 1, participants entering part 2 will be assigned to a dose level.

Interventions

NameTypeDescription
IDE-161DRUGOral Medication
PembrolizumabDRUGIntravenous Infusion
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Eligibility Criteria

Age Range18 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites27

Inclusion Criteria: 1. Adult participants must be 18 years of age or older 2. Advanced or metastatic solid tumors excluding primary central nervous system (CNS) tumors 3. For Module 1 only, Have documented evidence of BRCA1/2 and/or genetic alterations conferring homologous recombination deficiency...

Countries:United States
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Competitive Landscape -Other Solid Tumors 9 trials (matched to "Advanced or Metastatic Solid Tumors")

Recent Changes (Last 90 Days)

LOWJul 13, 2026NCT05787587lastUpdatePostDate: changed
LOWJul 13, 2026NCT05787587lastUpdatePostDate: changed

Frequently asked questions about IDE-161

What is IDE-161 used for?

IDE-161 is an investigational small molecule being developed for the treatment of advanced or metastatic solid tumors, including breast, ovarian, prostate, endometrial, colorectal, head and neck cancers, extensive stage small cell lung cancer, and non-small cell lung cancer. It is currently in Phase 1 clinical development.

What does IDE-161 target?

IDE-161 targets B7H3, a protein involved in tumor immune evasion. As a small molecule, it is designed to modulate this target in the treatment of advanced solid tumors. The drug is being studied in a Phase 1 clinical trial for its safety and efficacy.

Who makes IDE-161?

IDE-161 is being developed by IDEAYA Biosciences, Inc., a biopharmaceutical company traded on the NASDAQ under the ticker symbol IDYA. The company is conducting a Phase 1 clinical trial to evaluate the drug in patients with advanced or metastatic solid tumors.

What phase is IDE-161 in?

IDE-161 is in Phase 1 clinical development. It is an investigational drug, not yet approved by regulatory authorities. The ongoing Phase 1 trial is active but not recruiting participants, and the drug has received Fast Track designation from the FDA.

What clinical trials is IDE-161 in?

IDE-161 is being studied in a single Phase 1 clinical trial with the identifier NCT05787587, titled 'A Study of PARG Inhibitor IDE161 in Participants With Advanced Solid Tumors.' The trial is active but not recruiting, with an estimated enrollment of 216 participants in the United States.

Is IDE-161 the same as IDE161?

Yes, IDE-161 and IDE161 refer to the same investigational drug. The compound is being developed by IDEAYA Biosciences for the treatment of advanced or metastatic solid tumors and is currently in Phase 1 clinical trials.