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KEYMAKER-U01 Substudy 01A: Efficacy and Safety Study of Pembrolizumab (MK-3475) With or Without Chemotherapy When Used With Investigational Agents in Treatment-naïve Participants With Stage IV Non-small Cell Lung Cancer (NSCLC) (MK-3475-01A/KEYMAKER-U01A)

KEYMAKER-U01 Substudy 01A: A Phase 1/2, Umbrella Study With Rolling Arms of Investigational Agents With Pembrolizumab With or Without Chemotherapy in Treatment-Naive Participants With Stage IV Non-small Cell Lung Cancer (NSCLC)

Status
Recruiting
Phases
Phase 1Phase 2
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT04165070
Enrollment
450
Registered
2019-11-15
Start date
2019-12-19
Completion date
2032-02-13
Last updated
2026-03-16

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Carcinoma, Non-Small-Cell Lung

Keywords

Programmed Cell Death-1 (PD1, PD-1), Programmed Death-Ligand 1 (PDL1, PD-L1)

Brief summary

The purpose of this study is to assess the efficacy and safety of pembrolizumab (MK-3475) with or without chemotherapy in combination with vibostolimab (MK-7684), boserolimab (MK-5890), MK-4830, MK-0482, I-DXd, or HER3-DXd in treatment-naïve participants with advanced squamous or non-squamous NSCLC. This study is one of the pembrolizumab substudies being conducted under one pembrolizumab umbrella master protocol (MK-3475-U01/KEYMAKER-U01).

Detailed description

The master screening protocol is MK-3475-U01 (KEYMAKER-U01) - NCT04165798

Interventions

BIOLOGICALPembrolizumab

IV infusion

DRUGCarboplatin

IV infusion

DRUGPaclitaxel

IV infusion

DRUGPemetrexed

IV infusion

BIOLOGICALVibostolimab

IV infusion

BIOLOGICALBoserolimab

IV infusion

BIOLOGICALMK-4830

IV infusion

BIOLOGICALMK-0482

IV Infusion

IV infusion

BIOLOGICALHER3-DXd

IV Infusion

Sponsors

Merck Sharp & Dohme LLC
Lead SponsorINDUSTRY
Daiichi Sankyo
CollaboratorINDUSTRY

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
NONE

Intervention model description

Only participants in Part A will be randomized.

Eligibility

Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
No

Inclusion criteria

The main inclusion criteria include but are not limited to the following: * Has histologically- or cytologically-confirmed diagnosis of Stage IV squamous or nonsquamous NSCLC * Participants with nonsquamous NSCLC who are not eligible for an approved targeted therapy * Is able to provide archival tumor tissue sample collected either within 5 years or within the interval from completion of last treatment but before entering the screening period or newly obtained core or excisional biopsy of a tumor lesion not previously irradiated obtained within 90 days of treatment initiation * Has not received prior systemic treatment for their metastatic NSCLC * Is able to complete all screening procedures within the 35-day screening window for Part A and 28-day screening window for Part B

Exclusion criteria

The main

Design outcomes

Primary

MeasureTime frameDescription
Part A: Objective Response Rate (ORR) According to Response Evaluation Criteria in Solid Tumors Version 1.1 (RECIST 1.1)Up to approximately 24 monthsORR was defined as the percentage of participants in the analysis population who had a Complete Response (CR: Disappearance of all target lesions) or a Partial Response (PR: ≥30% decrease in the sum of diameters of target lesions) per RECIST 1.1. ORR will be reported.
Part B: Number of Participants Who Experience One or More Adverse Events (AEs)Up to approximately 27 monthsAn AE is defined as any unfavorable and unintended sign, symptom, disease, or worsening of preexisting condition temporally associated with study treatment and irrespective of causality to study treatment. The number of participants who experience an AE will be reported.
Part B: Number of Participants Who Discontinue Study Intervention Due to an Adverse Event (AE)Up to approximately 24 monthsAn AE is defined as any unfavorable and unintended sign, symptom, disease, or worsening of preexisting condition temporally associated with study treatment and irrespective of causality to study treatment. The number of participants who discontinue study intervention due to an AE will be reported.
Part B: Number of Participants Who Experience a Dose Limiting Toxicity (DLT)Up to approximately 3 WeeksA DLT is defined as an event with toxicity including the type, severity, time of onset, time of resolution, and the probable association with study treatment that are not due to pre-existing conditions as defined by the Common Terminology Criteria for Adverse Events Version 5.0 (CTCAE 5.0). Number of participants who experience a DLT per CTCAE 5.0 will be reported.

Secondary

MeasureTime frameDescription
Part A: Progression-Free Survival (PFS) According to RECIST 1.1Up to approximately 24 monthsPFS is defined as the time from first dose of study treatment until either the earliest date of documented progressive disease (PD) or death due to any cause, whichever occurs first. Per RECIST 1.1, PD is defined as ≥20% increase in the sum of diameters of target lesions. In addition to the relative increase of 20%, the sum must also demonstrate an absolute increase of ≥5 mm. The appearance of one or more new lesions is also considered PD. PFS will be reported.
Part A: Number of Participants Who Experience One or More AEsUp to approximately 27 monthsAn AE is defined as any unfavorable and unintended sign, symptom, disease, or worsening of preexisting condition temporally associated with study treatment and irrespective of causality to study treatment. The number of participants who experience an AE will be reported.
Part A: Number of Participants Who Discontinue Study Treatment Due to an AEUp to approximately 24 monthsAn AE is defined as any unfavorable and unintended sign, symptom, disease, or worsening of preexisting condition temporally associated with study treatment and irrespective of causality to study treatment. The number of participants who discontinue study intervention due to an AE will be reported.
Part B: ORR per RECIST 1.1 as assessed by blinded independent central review (BICR)Up to approximately 24 monthsORR was defined as the percentage of participants in the analysis population who had a Complete Response (CR: Disappearance of all target lesions) or a Partial Response (PR: ≥30% decrease in the sum of diameters of target lesions) per RECIST 1.1. ORR will be reported.
Part B: Duration of Response (DOR) per RECIST 1.1 as assessed by BICRUp to approximately 24 monthsFor participants who show confirmed CR or PR, DOR is defined as the time from first documented evidence of CR or PR until disease progression or death due to any cause, whichever occurs first. DOR will be reported.
Part B: Cmax of I-DXdAt designated time points up to approximately 2 yearsCmax is the maximum concentration of the drug observed in plasma. Blood samples collected pre dose and at multiple timepoints post dose will be used to determine Cmax of I-DXd.
Part B: Cmax of HER3-DXdAt designated time points up to approximately 2 yearsCmax is the maximum concentration of the drug observed in plasma. Blood samples collected pre dose and at multiple timepoints post dose will be used to determine Cmax of HER3-DXd.
Part B: Cmax of pembrolizumabAt designated time points up to approximately 2 yearsCmax is the maximum concentration of the drug observed in serum. Blood samples collected pre dose and at multiple timepoints post dose will be used to determine Cmax of pembrolizumab.
Part B: Ctrough of I-DXdAt designated time points up to approximately 2 yearsCtrough is defined as the lowest observed concentration of drug in plasma at the end of the dosing interval. Blood samples collected pre dose and at multiple timepoints post dose will be used to determine Ctrough of I-DXd.
Part B: Ctrough of HER3-DXdAt designated time points up to approximately 2 yearsCtrough is defined as the lowest observed concentration of drug in plasma at the end of the dosing interval. Blood samples collected pre dose and at multiple timepoints post dose will be used to determine Ctrough of HER3-DXd.
Part B: Ctrough of pembrolizumabAt designated time points up to approximately 2 yearsCtrough is defined as the lowest observed concentration of drug in serum at the end of the dosing interval. Blood samples collected pre dose and at multiple timepoints post dose will be used to determine Ctrough of pembrolizumab.

Countries

Hungary, Israel, Italy, Poland, South Korea, Spain, Taiwan, Ukraine, United States

Contacts

CONTACTToll Free Number
Trialsites@msd.com1-888-577-8839
STUDY_DIRECTORMedical Director

Merck Sharp & Dohme LLC

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Mar 17, 2026