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INCB0123667

Phase 1

Solid Tumors | Small molecule | Oncology |Incyte Corporation|Last Updated: Apr 14, 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
CONTROLLEDBiomarker
Total Trials1
Total Enrollment604
FDA Designations
No designations recorded
Clinical Trials (1)
NCT IDTitlePhaseStatusEnrollmentVelocityDesignStartCompletionLast UpdatedSitesCountries
NCT05238922Study of INCB123667 in Subjects With Advanced Solid TumorsPHASE1 RECRUITING 604Jul 5, 2022Aug 31, 2027Apr 14, 202642 United States, France +6
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Study Endpoints
Primary Endpoints
Part 1A : Occurrence of Dose Limiting Toxicities (DLTs)
Up to Day 28

Toxicities occurring during the first treatment cycle, Part 1a, will define tolerability. DLTs will be assessed for severity by the investigator using CTCAE v5.0 criteria.

Number of Participants With Treatment Emergent Adverse Events (TEAEs)
Up to 12 months

TEAE is any Adverse Event (AE) either reported for the first time or worsening of a pre-existing event after first dose of study drug.

Number of Participants with Dose Interruptions due to TEAE
Up to 12 months

Participants will receive dose reductions of INCB123667 according to lab guidelines. Treatment may be delayed for up to 2 weeks to allow for resolution of toxicity.

Number of Participants who Undergo Dose Reductions due to TEAE
Up to 12 months

Participants will receive dose reductions according to lab guidelines. Treatment may be delayed for up to 2 weeks to allow for resolution of toxicity.

Number of Participants Discontinue study due to TEAE
Up to 12 months

TEAE is defined as any untoward medical occurrence in a patient or clinical study participant, temporally associated with the use of study treatment, whether or not considered related to the study treatment.

Secondary Endpoints
PK parameters: Cmax
Cycle 1 Days 1, 2, 8 and 9; Cycle 2 Day 1; Cycles 3 through 9 Day 1 (each cycle is 28 days)
PK parameters: tmax
Cycle 1 Days 1, 2, 8 and 9; Cycle 2 Day 1; Cycles 3 through 9 Day 1 (each cycle is 28 days)
PK parameters: Ctau
Cycle 1 Days 1, 2, 8 and 9; Cycle 2 Day 1; Cycles 3 through 9 Day 1 (each cycle is 28 days)
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Study Design & Arms
AllocationNON_RANDOMIZED
MaskingNONE
ModelSEQUENTIAL
PurposeTREATMENT
Treatment Arms
ArmTypeDescription
Phase 1a Dose EscalationEXPERIMENTALINCB123667 will be administered at a protocol defined starting regimen once daily (QD) orally in 28-day cycles. Subsequent dose regimens will be determined during study conduct.
Phase 1b: Dose Expansion Cohort Disease Group 1EXPERIMENTALINCB123667 will be administered at the recommended dose or doses for expansion (RDE\[s\]) for advanced or metastatic solid tumors. Participants with gynecologic tumors (epithelial ovarian/fallopian/primary peritoneal carcinoma) will enroll in this group.
Phase 1b: Dose Expansion Cohort Disease Group 2EXPERIMENTALINCB123667 will be administered at the recommended dose or doses for expansion (RDE\[s\]) for advanced or metastatic solid tumors. Participants with Endometrial/Uterine cancer will enroll in this group.
Phase 1b: Dose Expansion Cohort Disease Group 3EXPERIMENTALINCB123667 will be administered at the recommended dose or doses for expansion (RDE\[s\]) for advanced or metastatic solid tumors. Participants with gastric, Gastro Esophageal Junction (GEJ), and esophageal adenocarcinomas will enroll in this group.
Phase 1b: Dose Expansion Cohort Disease Group 4EXPERIMENTALINCB123667 will be administered at the recommended dose or doses for expansion (RDE\[s\]) for advanced or metastatic solid tumors. Participants with Triple Negative Breast Cancer(TNBC) will enroll in this group.
Phase 1b: Dose Expansion Cohort Disease Group 5EXPERIMENTALINCB123667 will be administered at the recommended dose or doses for expansion (RDE\[s\]) for advanced or metastatic solid tumors. Participants with HR+/HER2- breast cancer who have had disease progression on or been intolerant of a CDK4/6 inhibitor will enroll in this group.
Phase 1b: Dose Expansion Cohort Disease Group 6EXPERIMENTALINCB123667 will be administered at the recommended dose or doses for expansion (RDE\[s\]) for advanced or metastatic solid tumors will enroll in this group.
Phase 2a Dose Escalation Treatment Group A (TGA)EXPERIMENTALINCB123667 administered in combination with palbociclib at the recommended doses in participants with HR+/HER2- breast cancer and in participants with a different tumor as defined in the protocol.
Phase 2a Dose Escalation Treatment Group B (TGB)EXPERIMENTALINCB123667 administered in combination with palbociclib and fulvestrant at the recommended doses in participants with HR+/HER2- breast cancer as defined in the protocol.
Phase 2a Dose Escalation Treatment Group C (TGC)EXPERIMENTALINCB123667 administered in combination with ribociclib at the recommended doses in participants with HR+/HER2- breast cancer and in participants with a different tumor as defined in the protocol.
Phase 2a Dose Escalation Treatment Group D (TGD)EXPERIMENTALINCB123667 administered in combination with ribociclib and fulvestrant at the recommended doses in participants with HR+/HER2- breast cancer as defined in the protocol.
Phase 2a Dose Escalation Treatment Group E (TGE)EXPERIMENTALINCB123667 administered in combination with bevacizumab at the recommended doses in participants with HR+/HER2- breast cancer and in participants with a different tumor as defined in the protocol.
Phase 2a Dose Escalation Treatment Group F (TGF)EXPERIMENTALINCB123667 administered in combination with olaparib at the recommended doses in participants with HR+/HER2- breast cancer and in participants with a different tumor as defined in the protocol.
Phase 2a Dose Escalation Treatment Group G (TGG)EXPERIMENTALINCB123667 administered in combination with paclitaxel at the recommended doses in participants with HR+/HER2- breast cancer and in participants with a different tumor as defined in the protocol.
Phase 2b Dose Expansion Treatment Group H (TGH)EXPERIMENTALINCB123667 administered in combination with palbociclib at the recommended doses in participants with HR+/HER2- breast cancer and in participants with a different tumor as defined in the protocol.
Phase 2b Dose Expansion Treatment Group I (TGI)EXPERIMENTALINCB123667 administered in combination with palbociclib and fulvestrant at the recommended doses in participants with HR+/HER2- breast cancer as defined in the protocol
Phase 2b Dose Expansion Treatment Group J (TGJ)EXPERIMENTALINCB123667 administered in combination with ribociclib at the recommended doses in participants with HR+/HER2- breast cancer and in participants with a different tumor as defined in the protocol.
Phase 2b Dose Expansion Treatment Group K (TGK)EXPERIMENTALINCB123667 administered in combination with ribociclib and fulvestrant at the recommended doses in participants with HR+/HER2- breast cancer as defined in the protocol.
Phase 2b Dose Expansion Treatment Group L (TGL)EXPERIMENTALINCB123667 administered in combination with bevacizumab at the recommended doses in participants with gynecologic tumors (epithelial ovarian/fallopian/primary peritoneal carcinoma) as defined by the protocol.
Phase 2b Dose Expansion Treatment Group M (TGM)EXPERIMENTALINCB123667 administered in combination with olaparib at the recommended doses in participants with gynecologic tumors (epithelial ovarian/fallopian/primary peritoneal carcinoma) as defined by the protocol.
Phase 2b Dose Expansion Treatment Group N (TGN)EXPERIMENTALINCB123667 administered in combination with weekly paclitaxel at the recommended doses in participants with gynecologic tumors (epithelial ovarian/fallopian/primary peritoneal carcinoma) as defined by the protocol.
Interventions
NameTypeDescription
INCB0123667DRUG25 mg tablets
PalbociclibDRUGPalbociclib will be administered at protocol defined dose.
BevacizumabDRUGBevacizumab will be administered at protocol defined dose.
OlaparibDRUGOlaparib will be administered at protocol defined dose.
PaclitaxelDRUGPaclitaxel will be administered at protocol defined dose.
RibociclibDRUGRibociclib will be administered at protocol defined dose.
FulvestrantDRUGFulvestrant will be administered at protocol defined dose.
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Eligibility Criteria
Age Range18 Years — N/A
SexALL
Healthy VolunteersNo
Study Sites42

Inclusion Criteria: * Adults aged 18 years or older at the time of the signing of the ICF. * Life expectancy greater than 12 weeks. * ECOG performance status score of 0 or 1. * Disease progression on prior standard treatment, intolerance to or ineligibility for standard treatment, or no available t...

Countries:United StatesFranceItalyJapanNetherlandsPuerto RicoSwitzerlandUnited Kingdom
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Recent Changes (Last 90 Days)
LOWMay 26, 2026NCT05238922primaryCompletionDate: changed
LOWMay 24, 2026NCT05238922studyFirstPostDate: changed