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Epacadostat

Phase 1

Neoplasms | Small molecule | Oncology |Merck & Company, Inc.|Last Updated: Aug 19, 2022

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 Enrollment34
FDA Designations
No designations recorded
Clinical Trials (1)
NCT IDTitlePhaseStatusEnrollmentVelocityDesignStartCompletionLast UpdatedSitesCountries
NCT02862457Study of Epacadostat (INCB024360) Alone and In Combination With Pembrolizumab (MK-3475) With Chemotherapy and Pembrolizumab Without Chemotherapy in Participants With Advanced Solid Tumors (MK-3475-434)PHASE1 COMPLETED 34Aug 23, 2016Nov 20, 2020Aug 19, 2022 -
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Study Endpoints
Primary Endpoints
Number of Participants Experiencing Dose-Limiting Toxicities (DLTs) According to National Cancer Institute Common Terminology Criteria for Adverse Events Version 4.0 (NCI-CTCAE v.4.0)
Up to Day 7 for Part A Cohort 1; up to Day 21 for Part A Cohort 2 and Part B

A DLT was defined as the occurrence of any treatment-emergent adverse event occurring up to and including Study Day 7 for Part A Cohort 1 or Day 21 for Part A Cohort 2 and Part B. The following criteria defined DLTs: Grade (G) 4 thrombocytopenia; G4 neutropenia (despite optimal supportive care in Part B) lasting \>1 week; febrile neutropenia (only if considered clinically significant in Part B); G4 toxicity; G3 laboratory abnormality lasting \>1 week: G3 toxicity excluding nausea or vomiting controlled within 72 hours, rash in the absence of desquamation, no mucosal involvement, does not require systemic steroids, and resolves to G1 by the next scheduled dose of pembrolizumab or 14 days; G2 or higher episcleritis, uveitis, or iritis; unable to receive 75% of epacadostat or 1 dose of pembrolizumab during the DLT observation period because of toxicity, even if the toxicity does not meet DLT criteria; or \>2 week delay in initiating Cycle 2 due to toxicity.

Number of Participants Who Experienced At Least One Adverse Event (AE)
Up to approximately 39.7 months

An adverse event is defined as any untoward medical occurrence in a patient or clinical investigation participant administered a pharmaceutical product and which does not necessarily have to have a causal relationship with this treatment. An adverse event can therefore be any unfavourable and unintended sign (including an abnormal laboratory finding, for example), symptom, or disease temporally associated with the use of a medicinal product or protocol-specified procedure, whether or not considered related to the medicinal product or protocol-specified procedure. Any worsening (i.e., any clinically significant adverse change in frequency and/or intensity) of a preexisting condition that is temporally associated with the use of the Sponsor's product, is also an adverse event. The number of participants who experienced an AE was reported for each arm.

Number of Participants Who Discontinued Study Treatment Due to An Adverse Event (AE)
Up to approximately 38.5 months

An adverse event is defined as any untoward medical occurrence in a patient or clinical investigation participant administered a pharmaceutical product and which does not necessarily have to have a causal relationship with this treatment. An adverse event can therefore be any unfavourable and unintended sign (including an abnormal laboratory finding, for example), symptom, or disease temporally associated with the use of a medicinal product or protocol-specified procedure, whether or not considered related to the medicinal product or protocol-specified procedure. Any worsening (i.e., any clinically significant adverse change in frequency and/or intensity) of a preexisting condition that is temporally associated with the use of the Sponsor's product, is also an adverse event. The number of participants who discontinued due to an AE was reported for each arm.

Secondary Endpoints
Maximum Concentration (Cmax) of Epacadostat in Part A
Cycle 1 (28-day cycle): Days 1, 5, and 12 at predose and 0.5, 1, 2, 4, 6, 8 and 10 hours postdose
Time to Maximum Concentration (Tmax) of Epacadostat in Part A
Cycle 1 (28-day cycle): Days 1, 5, and 12 at predose and 0.5, 1, 2, 4, 6, 8 and 10 hours postdose
Area Under the Concentration-Time Curve From Zero to the Time of the Last Measurable Concentration (AUC0-t) of Epacadostat in Part A
Cycle 1 (28-day cycle): Days 1, 5, and 12 at predose and 0.5, 1, 2, 4, 6, 8 and 10 hours postdose
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Study Design & Arms
AllocationNON_RANDOMIZED
MaskingNONE
ModelPARALLEL
PurposeTREATMENT
Treatment Arms
ArmTypeDescription
Part A Cohort 1: epacadostat 25 mgEXPERIMENTALParticipants received 25 mg of epacadostat orally twice daily (BID) alone on Days 1-5 of Cycle 1 (28-day cycle) with a washout on Days 6 and 7. On Day 8 participants received a one-time intravenous (IV) infusion of 200 mg pembrolizumab while continuing to receive 25 mg of epacadostat BID on Days 8-28. For each 21-day cycle thereafter, participants received a one-time IV infusion of 200 mg pembrolizumab on Day 1 and received 25 mg of epacadostat BID on Days 1-21 for up to 35 cycles (approximately 2 years).
Part A Cohort 1: epacadostat 100 mgEXPERIMENTALParticipants received 100 mg of epacadostat orally BID alone on Days 1-5 of Cycle 1 (28-day cycle) with a washout on Days 6 and 7. On Day 8 participants received a one-time IV infusion of 200 mg pembrolizumab while continuing to receive 100 mg of epacadostat BID on Days 8-28. For each 21-day cycle thereafter, participants received a one-time IV infusion of 200 mg pembrolizumab on Day 1 and received 100 mg of epacadostat BID on Days 1-21 for up to 35 cycles (approximately 2 years).
Part A Cohort 2: epacadostat 25 mg+pembrolizumabEXPERIMENTALFor each 21-day cycle, participants received a one-time IV infusion of 200 mg pembrolizumab on Day 1 and received 25 mg of epacadostat orally BID on Days 1-21 for up to 35 cycles (approximately 2 years).
Part A Cohort 2: epacadostat 100 mg+pembrolizumabEXPERIMENTALFor each 21-day cycle, participants received a one-time IV infusion of 200 mg pembrolizumab on Day 1 and received 100 mg of epacadostat orally BID on Days 1-21 for up to 35 cycles (approximately 2 years).
Part B Cohort 1: pembrolizumab+cisplatin+pemetrexedEXPERIMENTALFor each 21-day cycle, participants received a one-time IV infusion of 200 mg pembrolizumab on Day 1 and 100 mg of epacadostat orally BID on Days 1-21 for up to 35 cycles (approximately 2 years). For the first 4 cycles, participants also received a one-time IV infusion of 75 mg/m\^2 cisplatin and 500 mg/m\^2 pemetrexed on Day 1. Treatment with epacadostat was stopped with protocol amendment 02.
Part B Cohort 2: pembrolizumab+carboplatin+pemetrexedEXPERIMENTALFor each 21-day cycle, participants received a one-time IV infusion of 200 mg pembrolizumab on Day 1 and 100 mg of epacadostat orally BID on Days 1-21 for up to 35 cycles (approximately 2 years). For the first 4 cycles, participants also received a one-time IV infusion of Area Under the Curve (AUC) 5 carboplatin and 500 mg/m\^2 pemetrexed on Day 1. Treatment with epacadostat was stopped with protocol amendment 02.
Part B Cohort 3: pembrolizumab+carboplatin+paclitaxelEXPERIMENTALFor each 21-day cycle, participants received a one-time IV infusion of 200 mg pembrolizumab on Day 1 and 100 mg of epacadostat orally BID on Days 1-21 for up to 35 cycles (approximately 2 years). For the first 4 cycles, participants also received a one-time IV infusion of AUC 6 carboplatin and 200 mg/m\^2 paclitaxel on Day 1. Treatment with epacadostat was stopped with protocol amendment 02.
Interventions
NameTypeDescription
Epacadostat 25 mgDRUGOral administration
Epacadostat 100 mgDRUGOral administration
pembrolizumab 200 mgBIOLOGICALIntravenous (IV) infusion
Cisplatin 75 mg/m^2DRUGIV infusion
Carboplatin Area Under the Curve (AUC) 5DRUGIV infusion
Pemetrexed 500 mg/m^2DRUGIV infusion
Paclitaxel 200 mg/m^2DRUGIV infusion
Carboplatin AUC 6DRUGIV infusion
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Eligibility Criteria
Age Range20 Years — N/A
SexALL
Healthy VolunteersNo

Inclusion Criteria: * For Part A: Has a histologically-confirmed metastatic or locally advanced solid tumor that has failed to respond to standard therapy, progressed despite standard therapy, or for which standard therapy does not exist. * For Part B: Has a histologically-confirmed or cytologicall...

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