Study to Explore the Safety, Tolerability and Efficacy of MK-3475 in Combination With INCB024360 in Participants With Selected Cancers
CompletedPhase 1, PHASE2Results postedLast updated 14 February 2022
What this trial tests
Phase 1, PHASE2 trial testing MK-3475 in Microsatellite-instability (MSI) High Colorectal Cancer (CRC) in 444 participants. Completed in 6 November 2020.
18 and older, any sex, with Microsatellite-instability (MSI) High Colorectal Cancer (CRC) or Endometrial Cancer. Patients with the condition only — healthy volunteers not accepted.
Results — posted to ClinicalTrials.gov
Per-arm endpoint measurements with 95% confidence intervals where reported. Source: trial results section.
Phase 1: Percentage of Participants With Treatment-Emergent Adverse Events (TEAE) and Serious Treatment-Emergent Adverse EventsPrimary· Approximately 54 months
An adverse event is defined as the appearance of (or worsening of any pre-existing) undesirable sign(s), symptom(s), or medical condition(s) that occur after a participant provides informed consent. A TEAE is any adverse event either reported for the first time or worsening of a pre-existing event after first dose of study drug. Serious adverse event (SAE) is defined as an event that meets 1 of the following criteria: is fatal or life threatening, results in persistent or significant disability or incapacity, constitutes a congenital anomaly or birth defect, is clinically meaningful (i.e. defi
SAE
Group
Value
95% CI
Phase 1: Epacadostat 25 mg BID
0
Phase 1: Epacadostat 50 mg BID
40.0
Phase 1: Epacadostat 100 mg BID
50.0
Phase 1: Epacadostat 300 mg BID
45.0
TEAS
Group
Value
95% CI
Phase 1: Epacadostat 25 mg BID
100.
Phase 1: Epacadostat 50 mg BID
95.0
Phase 1: Epacadostat 100 mg BID
94.4
Phase 1: Epacadostat 300 mg BID
100.
Phase 2: Objective Response Rate (ORR)Primary· Approximately 54 months
ORR was percentage of participants with best overall response \[complete response (CR) or partial response (PR)\], per Response Evaluation Criteria In Solid Tumors Criteria (RECIST v1.0) for target lesions and assessed by MRI: Complete Response (CR), Disappearance of all target lesions; Partial Response (PR), \>=30% decrease in the sum of the longest diameter of target lesions; Overall Response (OR) = CR + PR.
Triple negative breast cancer
Group
Value
95% CI
Epacadostat 100 mg BID+ Pembrolizumab 200 mg Q3W
11.1
Microsatellite-instability high colorectal cancer
Group
Value
95% CI
Epacadostat 100 mg BID+ Pembrolizumab 200 mg Q3W
43.8
Gastric cancer
Group
Value
95% CI
Epacadostat 100 mg BID+ Pembrolizumab 200 mg Q3W
22.2
Hepatocellular carcinoma
Group
Value
95% CI
Epacadostat 100 mg BID+ Pembrolizumab 200 mg Q3W
16.7
Melanoma - immune checkpoint-naïve
Group
Value
95% CI
Epacadostat 100 mg BID+ Pembrolizumab 200 mg Q3W
60.5
Non-small cell lung cancer (NSCLC) (tumor proportion score (TPS) < 50% or indeterminate)
Phase 2: Duration of Response (DOR)Secondary· Up to 54 months
Duration of response is the time from the first overall response contributing to an objective response (complete or partial response) for DLBCL to the date of death or the date of first overall response of progressive diseasemeasured (by irRECIST for solid tumors or the Lugano Classification, whichever is earliest.
Hepatocellular Carcinoma
Group
Value
95% CI
Epacadostat 100 mg BID+ Pembrolizumab 200 mg Q3W
NA
2.04 – NA
Triple Negative Breast Cancer
Group
Value
95% CI
Epacadostat 100 mg BID+ Pembrolizumab 200 mg Q3W
NA
0.92 – NA
Immune Checkpoint-naïve Melanoma
Group
Value
95% CI
Epacadostat 100 mg BID+ Pembrolizumab 200 mg Q3W
NA
26.35 – NA
NSCLC high positive (PD-L1 TPS ≥ 50%)
Group
Value
95% CI
Epacadostat 100 mg BID+ Pembrolizumab 200 mg Q3W
12.44
2.10 – 16.53
NSCLC low/negative or indeterminate (PD-L1 TPS < 50% or indeterminate)
Group
Value
95% CI
Epacadostat 100 mg BID+ Pembrolizumab 200 mg Q3W
11.93
8.90 – 14.95
NSCLC (TPS 0%)
Group
Value
95% CI
Epacadostat 100 mg BID+ Pembrolizumab 200 mg Q3W
NA
7.43 – NA
NSCLC Unknown
Group
Value
95% CI
Epacadostat 100 mg BID+ Pembrolizumab 200 mg Q3W
10.84
4.14 – NA
Renal Cell Carcinoma
Group
Value
95% CI
Epacadostat 100 mg BID+ Pembrolizumab 200 mg Q3W
16.95
12.58 – NA
Phase 2: Progression Free Survival (PFS)Secondary· Up to 54 months
Progression-free survival is defined as number of days from the first day of taking study drug to the earlier of death or disease progression by irRECIST v1.1 for select solid tumors and modified Lugano Classification for DLBCL.
Hepatocellular Carcinoma
Group
Value
95% CI
Epacadostat 100 mg BID+ Pembrolizumab 200 mg Q3W
5.49
2.69 – 10.28
Triple Negative Breast Cancer
Group
Value
95% CI
Epacadostat 100 mg BID+ Pembrolizumab 200 mg Q3W
1.97
1.87 – 2.92
Immune Checkpoint-naïve Melanoma
Group
Value
95% CI
Epacadostat 100 mg BID+ Pembrolizumab 200 mg Q3W
16.69
6.24 – NA
Primary Refractory Melanoma
Group
Value
95% CI
Epacadostat 100 mg BID+ Pembrolizumab 200 mg Q3W
1.69
1.25 – 2.14
Relapsed Melanoma
Group
Value
95% CI
Epacadostat 100 mg BID+ Pembrolizumab 200 mg Q3W
2.60
2.14 – 4.21
NSCLC
Group
Value
95% CI
Epacadostat 100 mg BID+ Pembrolizumab 200 mg Q3W
4.09
2.14 – 7.36
Renal Cell Carcinoma
Group
Value
95% CI
Epacadostat 100 mg BID+ Pembrolizumab 200 mg Q3W
4.50
2.33 – 6.24
Squamous Cell Carcinoma of the Head and Neck
Group
Value
95% CI
Epacadostat 100 mg BID+ Pembrolizumab 200 mg Q3W
4.37
2.30 – 7.79
Phase 2: Duration of Disease ControlSecondary· Up to 54 months
The duration of disease control is the time from the treatment start date to the first objective response of PD (by irRECIST v1.1 or Lugano Classification), death, or last tumor assessment date (if PD/death not present), for subjects with best overall response of SD or better.
Hepatocellular Carcinoma
Group
Value
95% CI
Epacadostat 100 mg BID+ Pembrolizumab 200 mg Q3W
10.38
5.49 – NA
Triple Negative Breast Cancer
Group
Value
95% CI
Epacadostat 100 mg BID+ Pembrolizumab 200 mg Q3W
11.47
4.01 – 12.65
Immune Checkpoint-naïve Melanoma
Group
Value
95% CI
Epacadostat 100 mg BID+ Pembrolizumab 200 mg Q3W
30.29
25.03 – NA
Relapsed Melanoma
Group
Value
95% CI
Epacadostat 100 mg BID+ Pembrolizumab 200 mg Q3W
4.21
NA – NA
NSCLC Total
Group
Value
95% CI
Epacadostat 100 mg BID+ Pembrolizumab 200 mg Q3W
14.42
8.51 – 19.45
Renal Cell Carcinoma
Group
Value
95% CI
Epacadostat 100 mg BID+ Pembrolizumab 200 mg Q3W
13.39
5.13 – 18.86
Squamous Cell Carcinoma of the Head and Neck
Group
Value
95% CI
Epacadostat 100 mg BID+ Pembrolizumab 200 mg Q3W
9.18
6.24 – 13.34
Transitional Cell Carcinoma of the GU Tract
Group
Value
95% CI
Epacadostat 100 mg BID+ Pembrolizumab 200 mg Q3W
15.36
8.41 – 22.74
Phase 2: Overall Survival (OS)Secondary· Up to 54 months
Overall survival is determined from the date of first dose until death due to any cause.
Hepatocellular Carcinoma
Group
Value
95% CI
Epacadostat 100 mg BID+ Pembrolizumab 200 mg Q3W
NA
8.94 – NA
Triple Negative Breast Cancer
Group
Value
95% CI
Epacadostat 100 mg BID+ Pembrolizumab 200 mg Q3W
5.16
4.60 – 7.46
Immune Checkpoint-naïve Melanoma
Group
Value
95% CI
Epacadostat 100 mg BID+ Pembrolizumab 200 mg Q3W
NA
NA – NA
Primary Refractory Melanoma
Group
Value
95% CI
Epacadostat 100 mg BID+ Pembrolizumab 200 mg Q3W
NA
NA – NA
Relapsed Melanoma
Group
Value
95% CI
Epacadostat 100 mg BID+ Pembrolizumab 200 mg Q3W
NA
2.60 – NA
NSCLC
Group
Value
95% CI
Epacadostat 100 mg BID+ Pembrolizumab 200 mg Q3W
14.62
9.72 – 24.38
Renal Cell Carcinoma
Group
Value
95% CI
Epacadostat 100 mg BID+ Pembrolizumab 200 mg Q3W
NA
18.40 – NA
Squamous Cell Carcinoma of the Head and Neck
Group
Value
95% CI
Epacadostat 100 mg BID+ Pembrolizumab 200 mg Q3W
8.34
4.37 – 15.41
Phase 2: Ordinal Categorical Response ScoreSecondary· Up to 54 months
Ordinal categorical response score, determined by radiographic disease assessments per irRECIST v1.1. The 5-category ordinal response endpoint is determined at a given timepoint by classifying response into one of the following groups: 1 = Complete response per irRECIST v1.1 2 = Very good response, defined as \> 60% tumor reduction 3 = Minor response, defined as \> 30% to ≤ 60% tumor reduction 4 = Stable disease per irRECIST v1.1 5 = Progressive disease per irRECIST v1.1
Hepatocellular Carcinoma
Group
Value
95% CI
Epacadostat 100 mg BID+ Pembrolizumab 200 mg Q3W
0
Epacadostat 100 mg BID+ Pembrolizumab 200 mg Q3W
2
Epacadostat 100 mg BID+ Pembrolizumab 200 mg Q3W
2
Epacadostat 100 mg BID+ Pembrolizumab 200 mg Q3W
11
Triple Negative Breast Cancer
Group
Value
95% CI
Epacadostat 100 mg BID+ Pembrolizumab 200 mg Q3W
1
Epacadostat 100 mg BID+ Pembrolizumab 200 mg Q3W
1
Epacadostat 100 mg BID+ Pembrolizumab 200 mg Q3W
2
Epacadostat 100 mg BID+ Pembrolizumab 200 mg Q3W
7
Immune Checkpoint-naïve Melanoma
Group
Value
95% CI
Epacadostat 100 mg BID+ Pembrolizumab 200 mg Q3W
3
Epacadostat 100 mg BID+ Pembrolizumab 200 mg Q3W
17
Epacadostat 100 mg BID+ Pembrolizumab 200 mg Q3W
6
Epacadostat 100 mg BID+ Pembrolizumab 200 mg Q3W
5
Primary Refractory Melanoma
Group
Value
95% CI
Epacadostat 100 mg BID+ Pembrolizumab 200 mg Q3W
0
Epacadostat 100 mg BID+ Pembrolizumab 200 mg Q3W
0
Epacadostat 100 mg BID+ Pembrolizumab 200 mg Q3W
0
Epacadostat 100 mg BID+ Pembrolizumab 200 mg Q3W
0
Relapsed Melanoma
Group
Value
95% CI
Epacadostat 100 mg BID+ Pembrolizumab 200 mg Q3W
3
Epacadostat 100 mg BID+ Pembrolizumab 200 mg Q3W
4
Epacadostat 100 mg BID+ Pembrolizumab 200 mg Q3W
5
Epacadostat 100 mg BID+ Pembrolizumab 200 mg Q3W
8
NSCLC
Group
Value
95% CI
Epacadostat 100 mg BID+ Pembrolizumab 200 mg Q3W
4
Epacadostat 100 mg BID+ Pembrolizumab 200 mg Q3W
3
Epacadostat 100 mg BID+ Pembrolizumab 200 mg Q3W
8
Epacadostat 100 mg BID+ Pembrolizumab 200 mg Q3W
15
Renal Cell Carcinoma
Group
Value
95% CI
Epacadostat 100 mg BID+ Pembrolizumab 200 mg Q3W
2
Epacadostat 100 mg BID+ Pembrolizumab 200 mg Q3W
6
Epacadostat 100 mg BID+ Pembrolizumab 200 mg Q3W
4
Epacadostat 100 mg BID+ Pembrolizumab 200 mg Q3W
10
Squamous Cell Carcinoma of the Head and Neck
Group
Value
95% CI
Epacadostat 100 mg BID+ Pembrolizumab 200 mg Q3W
3
Epacadostat 100 mg BID+ Pembrolizumab 200 mg Q3W
4
Epacadostat 100 mg BID+ Pembrolizumab 200 mg Q3W
5
Epacadostat 100 mg BID+ Pembrolizumab 200 mg Q3W
8
Phase 2: Percentage of Participants With Treatment-Emergent Adverse Events (TEAE) and Serious Treatment-Emergent Adverse EventsSecondary· Up to 54 months
Treatment-Emergent Adverse Events (TEAE)
Group
Value
95% CI
Phase 2: Epacadostat 100 mg BID
100
Serious Treatment-Emergent Adverse Events
Group
Value
95% CI
Phase 2: Epacadostat 100 mg BID
51.0
Adverse events — posted to ClinicalTrials.gov
Time frame: Approximately 54 months.
Reporting threshold: 5%.
Adverse-event reports describe events observed during the trial — not all are caused by the drug.
Phase 1: Epacadostat 25 mg BID
Serious: 0/4 (0%)
Deaths: 2/4
Phase 1: Epacadostat 50 MG BID
Serious: 8/20 (40%)
Deaths: 13/20
Phase 1: Epacadostat 100 MG BID
Serious: 9/18 (50%)
Deaths: 12/18
Phase 1: Epacadostat 300 MG BID
Serious: 9/20 (45%)
Deaths: 14/20
Phase 2: Epacadostat 100 MG BID
Serious: 195/382 (51%)
Deaths: 209/382
Total
Serious: 221/444 (50%)
Deaths: 250/444
Serious adverse events (198 terms)
Reaction
System
Phase 1: Epacadostat 25 mg…
Phase 1: Epacadostat 50 MG…
Phase 1: Epacadostat 100 M…
Phase 1: Epacadostat 300 M…
Phase 2: Epacadostat 100 M…
Total
Malignant neoplasm progression
Neoplasms benign, malignant and unspecified (incl cysts and polyps)
—
—
—
—
—
—
Pneumonia
Infections and infestations
—
—
—
—
—
—
Abdominal pain
Gastrointestinal disorders
—
—
—
—
—
—
Nausea
Gastrointestinal disorders
—
—
—
—
—
—
Pleural effusion
Respiratory, thoracic and mediastinal disorders
—
—
—
—
—
—
Dyspnoea
Respiratory, thoracic and mediastinal disorders
—
—
—
—
—
—
Small intestinal obstruction
Gastrointestinal disorders
—
—
—
—
—
—
Disease progression
General disorders
—
—
—
—
—
—
Sepsis
Infections and infestations
—
—
—
—
—
—
Vomiting
Gastrointestinal disorders
—
—
—
—
—
—
Acute kidney injury
Renal and urinary disorders
—
—
—
—
—
—
Colitis
Gastrointestinal disorders
—
—
—
—
—
—
Pulmonary embolism
Respiratory, thoracic and mediastinal disorders
—
—
—
—
—
—
Anaemia
Blood and lymphatic system disorders
—
—
—
—
—
—
Dehydration
Metabolism and nutrition disorders
—
—
—
—
—
—
Diarrhoea
Gastrointestinal disorders
—
—
—
—
—
—
Hypotension
Vascular disorders
—
—
—
—
—
—
Pericardial effusion
Cardiac disorders
—
—
—
—
—
—
Pyrexia
General disorders
—
—
—
—
—
—
Urinary tract infection
Infections and infestations
—
—
—
—
—
—
Acute respiratory failure
Respiratory, thoracic and mediastinal disorders
—
—
—
—
—
—
Constipation
Gastrointestinal disorders
—
—
—
—
—
—
Failure to thrive
Metabolism and nutrition disorders
—
—
—
—
—
—
Pneumonia aspiration
Respiratory, thoracic and mediastinal disorders
—
—
—
—
—
—
Pneumonitis
Respiratory, thoracic and mediastinal disorders
—
—
—
—
—
—
Other adverse events (280 terms — click to expand)
The purpose of this study was to assess the safety, tolerability, and efficacy when combining MK-3475 and INCB024360 in participants with certain cancers. This study was conducted in 2 phases, Phase 1 and Phase 2.
Publications & conference data
8 peer-reviewed publications reference this trial (live from Europe PMC):
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NCT04098068 — Study of MK-3475 (Pembrolizumab) in Patients With Microsatellite Unstable (MSI) Tumors (Cohort D)
· Phase 2
· completed
NCT03003468 — Pembrolizumab + Imprime PGG for Metastatic Non-small Cell Lung Cancer After Progression on First-Line Therapy: Big Ten C
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NCT02852655 — A Pilot Surgical Trial To Evaluate Early Immunologic Pharmacodynamic Parameters For The PD-1 Checkpoint Inhibitor, Pembr
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Publications: Europe PMC API search by NCT ID, retrieved 9 June 2026
Drug + disease cross-links: matched in real time against Drug Landscape's normalised drug + company + condition tables
Sponsor: as reported to ClinicalTrials.gov by Incyte Corporation
Last refreshed: 14 February 2022
Drug Landscape aggregates and links these public records for informational use only. Always verify against the primary source before clinical or regulatory decisions. Canonical URL: https://druglandscape.com/trial/NCT02178722.