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A Study of MK-1484 as Monotherapy and in Combination With Pembrolizumab (MK-3475) In Advanced or Metastatic Solid Tumors (MK-1484-001)

A Phase 1, Open-Label, Multicenter Study to Assess the Safety and Tolerability of MK-1484 as a Monotherapy and in Combination With Pembrolizumab in Adult Participants With Advanced or Metastatic Solid Tumors

Status
Active, not recruiting
Phases
Phase 1
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT05382325
Enrollment
70
Registered
2022-05-19
Start date
2022-06-16
Completion date
2026-09-30
Last updated
2026-08-10

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

Conditions

Advanced or Metastatic Solid Tumors

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 safety and tolerability and to establish a preliminary recommended Phase 2 dose (RP2D) of MK-1484 administered as monotherapy and in combination with pembrolizumab (MK-3475) in adults with advanced or metastatic solid tumors.

Interventions

BIOLOGICALMK-1484

Subcutaneous (SC) injection

BIOLOGICALPembrolizumab

Intravenous (IV) infusion

Sponsors

Merck Sharp & Dohme LLC
Lead SponsorINDUSTRY

Study design

Allocation
NON_RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
NONE

Eligibility

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

Inclusion criteria

The main inclusion and

Exclusion criteria

include but are not limited to the following: Inclusion Criteria: * Has a histologically- or cytologically-confirmed advanced/metastatic solid tumor by pathology report and has received, or been intolerant to, all treatment known to confer clinical benefit. * Has measurable disease by Response Evaluation Criteria In Solid Tumors (RECIST) 1.1 as assessed by the local site investigator/radiology. * Has normal cardiac function based on transthoracic echocardiogram (TTE) or multigated acquisition scan (MUGA) * Has provided an evaluable archival or newly obtained tumor tissue sample for biomarker analysis. * Has adequate organ function. * A male participant must agree to use contraception and should refrain from donating sperm during the specified period(s) of at least 120 days after study interventions. * A female participant is eligible to participate if she is not pregnant or breastfeeding and at least 1 of the following: not a woman of childbearing potential (WOCBP) or a WOCBP who agrees to follow the contraceptive guidance during the treatment period for at least 120 days after study intervention.

Design outcomes

Primary

MeasureTime frameDescription
Number of Participants with a Dose-Limiting Toxicity (DLT) Graded Using National Cancer Institute Common Terminology Criteria for Adverse Events (AEs) Version 5.0Cycle 1 (Up to 21 days)DLT is defined as any of the following toxicities, if assessed by the investigator to be related to study treatment: Grade (Gr) 4 nonhematologic toxicity (not laboratory); Gr 4 hematologic toxicity lasting ≥7 days, except thrombocytopenia: Gr 4 thrombocytopenia of any duration; Gr 3 thrombocytopenia associated with clinically significant bleeding; Gr 4 anemia regardless of duration; Nonhematologic AE Gr ≥3 in severity, with exceptions; Any Gr 3 or 4 nonhematologic laboratory abnormality if: clinically significant medical intervention is required, or if abnormality leads to hospitalization, persists for \>1 week or results in drug-induced liver injury with exceptions; Gr 3 or Gr 4 febrile neutropenia; Prolonged delay (\>2 weeks) in initiating Cycle 2 due to treatment-related toxicity; Treatment-related toxicity resulting in participant study treatment discontinuation during Cycle 1; Missing \>25% of the MK-1484 dose during Cycle 1 resulting from treatment-related AE; Gr 5 toxicity.
Number of Participants Who Experience At Least One AEUp to approximately 27 monthsAn AE is any untoward medical occurrence in a clinical study participant, temporally associated with the use of study intervention, whether or not considered related to the study intervention. An AE can therefore be any unfavorable and unintended sign (including an abnormal laboratory finding), symptom, or disease (new or exacerbated) temporally associated with the use of a study intervention. The number of participants who experienced an AE will be reported.
Number of Participants Who Discontinue Study Treatment Due to an AEUp to approximately 24 monthsAn AE is any untoward medical occurrence in a clinical study participant, temporally associated with the use of study intervention, whether or not considered related to the study intervention. An AE can therefore be any unfavorable and unintended sign (including an abnormal laboratory finding), symptom, or disease (new or exacerbated) temporally associated with the use of a study intervention. The number of participants who discontinued study treatment due to an AE will be reported.

Secondary

MeasureTime frameDescription
Area Under the Curve (AUC) of MK-1484At designated time points (Up to approximately 24 months)Blood samples collected pre-dose and at multiple timepoints post-dose will be used to determine AUC.
Minimum Serum Concentration (Cmin) of MK-1484At designated time points (Up to approximately 24 months)Blood samples collected pre-dose and at multiple timepoints post-dose will be used to determine Cmin.
Maximum Serum Concentration (Cmax) of MK-1484At designated time points (Up to approximately 24 months)Blood samples collected pre-dose and at multiple timepoints post-dose will be used to determine Cmax.

Countries

Canada, Israel, Netherlands, United States

Contacts

STUDY_DIRECTORMedical Director

Merck Sharp & Dohme LLC

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Aug 11, 2026