Sacituzumab Tirumotecan (MK-2870) as Monotherapy and in Combination With Pembrolizumab in Participants With Advanced Solid Tumors (MK-2870-008) (TroFuse-008)

Phase 1 Trial of MK-2870 as Monotherapy and in Combination With Pembrolizumab ± Chemotherapy in Subjects With Advanced Solid Tumors

This is a phase 1 trial of the safety, tolerability, and pharmacokinetics (PK) of sacituzumab tirumotecan monotherapy, and of sacituzumab tirumotecan in combination with pembrolizumab (MK-3475) or pembrolizumab + carboplatin, in Japanese participants with advanced solid tumors or treatment-naïve advanced or metastatic non-small cell lung cancer (NSCLC).

Per protocol amendment 04, Arm 3: Pembrolizumab/Carboplatin + sacituzumab tirumotecan Combination Therapy was discontinued, and subsequently all Arm 3 procedures, recruitment, and descriptions were removed.

Study Overview

• Status: Active, not recruiting
• Conditions: Non-small Cell Lung Cancer; Solid Tumors; Programmed Cell Death-1 (PD1, PD-1); Programmed Cell Death 1 Ligand 1(PDL1, PD-L1); Programmed Cell Death 1 Ligand 2 (PDL2, PD-L2)
• Intervention / Treatment: Biological: Pembrolizumab; Biological: Sacituzumab tirumotecan; Drug: Supportive care measures

• Study Type: Interventional
• Enrollment (Estimated): 30
• Phase: Phase 1

Contacts and Locations

Study Locations

• Japan
  • Aichi-ken
    • Nagoya, Aichi-ken, Japan, 464-8681
      • Aichi Cancer Center ( Site 0006)
  • Chiba
    • Kashiwa, Chiba, Japan, 277-8577
      • National Cancer Center Hospital East ( Site 0002)
  • Ehime
    • Matsuyama, Ehime, Japan, 791-0280
      • National Hospital Organization Shikoku Cancer Center ( Site 0008)
  • Kanagawa
    • Yokohama, Kanagawa, Japan, 241-8515
      • Kanagawa Cancer Center ( Site 0004)
  • Osaka
    • Hirakata, Osaka, Japan, 573-1191
      • Kansai Medical University Hospital ( Site 0007)
  • Shizuoka
    • Nagaizumi-cho,Sunto-gun, Shizuoka, Japan, 411-8777
      • Shizuoka Cancer Center ( Site 0005)
  • Tokyo
    • Chuo-ku, Tokyo, Japan, 104-0045
      • National Cancer Center Hospital ( Site 0001)

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: Adult; Older Adult
• Accepts Healthy Volunteers: No

Description

Inclusion Criteria:

• Arm 1: Histologically or cytologically confirmed advanced/metastatic solid tumor by pathology report and have received, or been intolerant to, all treatment known to confer clinical benefit.
• Arm 2: Have a histologically or cytologically confirmed diagnosis of advanced or metastatic NSCLC (Stage IIIB or IIIC disease and not candidates for surgical resection or definitive chemoradiation, or Stage IV NSCLC, AJCC Staging Manual, version 8).
• Arm 2: Confirmation that EGFR-, ALK-, or ROS1-directed therapy is not indicated as primary therapy
• Arm 2: Has tumor tissue that demonstrates PD-L1 TPS ≥ 50% as determined by PD-L1 IHC 22C3 pharmDx assay by local laboratory
• If capable of producing sperm, the participant agrees to the following during the intervention period and for at least the time needed to eliminate each study intervention after the last dose of study intervention (100 days for sacituzumab tirumotecan and 90 days for carboplatin [no restriction for pembrolizumab]) AND agrees to refrain from donating sperm AND is either abstinent and agrees to remain abstinent or uses highly effective contraception
• For females (assigned at birth), is not pregnant or breastfeeding and ≥1 of the following applies: is not a participant of childbearing potential (POCBP) OR is a POCBP and uses highly effective contraception
• Arm 1: Participants who have AEs due to previous anticancer therapies must have recovered to ≤Grade 1 or baseline
• Measurable disease by RECIST 1.1 as assessed by the local site investigator/radiology
• Archival tumor tissue sample or newly obtained core or incisional biopsy of a tumor lesion not previously irradiated has been provided
• Have a life expectancy of at least 3 months
• Have an ECOG performance status of 0 or 1 within 3 days before the start of study intervention

Exclusion Criteria:

• Has symptomatic ascites or pleural effusion. A participant who is clinically stable following treatment for these conditions (including therapeutic thoraco- or paracentesis) is eligible
• Has Grade ≥2 peripheral neuropathy
• Has history of documented severe dry eye syndrome, severe Meibomian gland disease and/or blepharitis, or severe corneal disease that prevents/delays corneal healing
• Has active inflammatory bowel disease requiring immunosuppressive medication or previous history of inflammatory bowel disease
• Has uncontrolled, significant cardiovascular disease or cerebrovascular disease including New York Heart Association Class III or IV congestive heart failure, unstable angina, myocardial infarction, uncontrolled symptomatic arrhythmia, prolongation of QTcF interval to >480 ms, and/or other serious cardiovascular and cerebrovascular diseases within the 6 months preceding study intervention
• Received prior treatment with a TROP2-targeted ADC
• Received prior treatment with a topoisomerase I-containing ADC
• Arm 1: Has received any prior immunotherapy and was discontinued from that treatment due to a Grade 3 or higher irAE (except endocrine disorders that can be treated with replacement therapy) or was discontinued from that treatment due to Grade 2 myocarditis or recurrent Grade 2 pneumonitis
• Arm 2: Received prior therapy with an anti-PD-1, anti-PD-L1, or anti-PD-L2 agent or with an agent directed to another stimulatory or coinhibitory T-cell receptor (eg, CTLA-4, OX-40, CD137)
• Arm 2: Has received prior systemic chemotherapy or other targeted or biological antineoplastic therapy for their advanced or metastatic NSCLC
• Arm 2: Has received radiation therapy to the lung that is >30 Gy within 6 months of the first dose of study intervention
• Received prior systemic anticancer therapy including investigational agents within 4 weeks before allocation
• Received prior radiotherapy within 2 weeks of start of study intervention, or radiation-related toxicities, requiring corticosteroids
• Received a live or live-attenuated vaccine within 30 days before the first dose of study intervention
• Requires treatment with a strong inhibitor or inducer of CYP3A4 at least 14 days before the first dose of study intervention and throughout the study
• Has received an investigational agent or has used an investigational device within 4 weeks prior to study intervention administration
• Arm 2: Diagnosis of immunodeficiency or is receiving chronic systemic steroid therapy (in dosing exceeding 10 mg daily of prednisone equivalent) or any other form of immunosuppressive therapy within 7 days prior the first dose of study medication
• Arm 2: Active autoimmune disease that has required systemic treatment in the past 2 years except replacement therapy (eg, thyroxine, insulin, or physiologic corticosteroid)
• Known additional malignancy that is progressing or has required active treatment within the past 3 years
• Known active CNS metastases and/or carcinomatous meningitis
• History of (noninfectious) pneumonitis/interstitial lung disease that required steroids or has current pneumonitis/interstitial lung disease
• Active infection requiring systemic therapy
• History of HIV infection
• Concurrent active Hepatitis B (defined as HBsAg positive and/or detectable HBV DNA) and Hepatitis C virus (defined as anti-HCV Ab positive and detectable HCV RNA) infection
• History or current evidence of any condition, therapy, laboratory abnormality, or other circumstance that might confound the results of the study or interfere with the participant's participation for the full duration of the study, such that it is not in the best interest of the participant to participate, in the opinion of the treating investigator
• Known psychiatric or substance abuse disorder
• A severe hypersensitivity reaction to treatment a monoclonal antibody/component of the study intervention

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: Non-Randomized
• Interventional Model: Sequential Assignment
• Masking: None (Open Label)

Number of Arms

2

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: Arm 1: Sacituzumab tirumotecan Monotherapy; Participants receive single doses of sacituzumab tirumotecan monotherapy once every 2 weeks (Q2W).	Biological: Sacituzumab tirumotecan; Sacituzumab tirumotecan injection powder for intravenous (IV) infusion.; Other Names: SKB264; MK-2870; Drug: Supportive care measures; Participants are allowed to take supportive care measures at the discretion of the investigator. Prophylactic supportive care measures may include but are not limited to antiemetic agents, antidiarrheal agents, granulocyte and erythroid growth factors, and blood transfusions
Experimental: Arm 2: Pembrolizumab + Sacituzumab tirumotecan Combination Therapy; Participants receive sacituzumab tirumotecan Q2W in combination with pembrolizumab once every 6 weeks (Q6W).	Biological: Pembrolizumab; Pembrolizumab solution for IV infusion.; Other Names: MK-3475; Biological: Sacituzumab tirumotecan; Sacituzumab tirumotecan injection powder for intravenous (IV) infusion.; Other Names: SKB264; MK-2870; Drug: Supportive care measures; Participants are allowed to take supportive care measures at the discretion of the investigator. Prophylactic supportive care measures may include but are not limited to antiemetic agents, antidiarrheal agents, granulocyte and erythroid growth factors, and blood transfusions

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Number of Participants Experiencing Dose-Limiting Toxicity (DLT)	A DLT is defined as any of the following: Grade 4 nonhematologic toxicity; Grade 4 hematologic toxicity lasting ≥7 days, except thrombocytopenia or lymphopenia; any nonhematologic AE ≥Grade 3 in severity (with some exceptions); any Grade 3 or Grade 4 nonhematologic laboratory value (if certain criteria are met); febrile neutropenia Grade 3 or Grade 4; a prolonged delay (>2 weeks) in initiating sacituzumab tirumotecan second dose due to intervention-related toxicity; any intervention-related toxicity that causes the participant to discontinue intervention during DLT evaluation period; or any Grade 5 toxicity. All toxicities will be graded using National Cancer Institute Common Terminology Criteria for Adverse Events (NCI-CTCAE) v5.0.	Up to 21 days after each dose
Number of Participants Experiencing ≥1 Adverse Event (AE)	An 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.	Up to ~32 months
Number of Participants Discontinuing from Study Therapy due to AE	An 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.	Up to ~32 months

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Area Under the Plasma Concentration-Time Curve (AUC) of sacituzumab tirumotecan -Antibody-Drug Conjugate (sacituzumab tirumotecan ADC)	The AUC of sacituzumab tirumotecan -ADC will be determined in participants from Arm 1.	Day 1: Preinfusion and 0.5, 2, 4, 8, 24, 48, and 72 hours postinfusion
Maximum Plasma Concentration (Cmax) of sacituzumab tirumotecan-ADC	The Cmax of sacituzumab tirumotecan-ADC will be determined in participants from Arm 1.	Day 1: Preinfusion and 0.5, 2, 4, 8, 24, 48, and 72 hours postinfusion
Minimum Plasma Concentration (Cmin) of sacituzumab tirumotecan-ADC	The Cmin of sacituzumab tirumotecan-ADC will be determined in participants from Arm 1.	Day 1: Preinfusion and 0.5, 2, 4, 8, 24, 48, and 72 hours postinfusion
Apparent terminal half-life (t½) of sacituzumab tirumotecan-ADC	The t½ of sacituzumab tirumotecan-ADC will be determined in participants from Arm 1.	Day 1: Preinfusion and 0.5, 2, 4, 8, 24, 48, and 72 hours postinfusion
Time to Maximum Plasma Concentration (Tmax) of sacituzumab tirumotecan-ADC	The Tmax of sacituzumab tirumotecan-ADC will be determined in participants from Arm 1.	Day 1: Preinfusion and 0.5, 2, 4, 8, 24, 48, and 72 hours postinfusion
Clearance (CL) of sacituzumab tirumotecan-ADC	The CL of sacituzumab tirumotecan-ADC will be determined in participants from Arm 1.	Day 1: Preinfusion and 0.5, 2, 4, 8, 24, 48, and 72 hours postinfusion
Volume of Distribution (Vz) of sacituzumab tirumotecan-ADC	The Vz of sacituzumab tirumotecan-ADC will be determined in participants from Arm 1.	Day 1: Preinfusion and 0.5, 2, 4, 8, 24, 48, and 72 hours postinfusion
Accumulation Ratio (Rac) of sacituzumab tirumotecan-ADC	The Rac of sacituzumab tirumotecan-ADC will be determined in participants from Arm 1.	Day 1: Preinfusion and 0.5, 2, 4, 8, 24, 48, and 72 hours postinfusion
Area Under the Plasma AUC of sacituzumab tirumotecan-Total Antibody (sacituzumab tirumotecan-TAB)	The AUC of sacituzumab tirumotecan-TAB will be determined in participants from Arm 1.	Day 1: Preinfusion and 0.5, 2, 4, 8, 24, 48, and 72 hours postinfusion
Cmax of sacituzumab tirumotecan-TAB	The Cmax of sacituzumab tirumotecan-TAB will be determined in participants from Arm 1.	Day 1: Preinfusion and 0.5, 2, 4, 8, 24, 48, and 72 hours postinfusion
Cmin of sacituzumab tirumotecan-TAB	The Cmin of sacituzumab tirumotecan-TAB will be determined in participants from Arm 1.	Day 1: Preinfusion and 0.5, 2, 4, 8, 24, 48, and 72 hours postinfusion
t½ of sacituzumab tirumotecan-TAB	The t½ of sacituzumab tirumotecan-TAB will be determined in participants from Arm 1.	Day 1: Preinfusion and 0.5, 2, 4, 8, 24, 48, and 72 hours postinfusion
Tmax of sacituzumab tirumotecan-TAB	The Tmax of sacituzumab tirumotecan-TAB will be determined in participants from Arm 1.	Day 1: Preinfusion and 0.5, 2, 4, 8, 24, 48, and 72 hours postinfusion
CL of sacituzumab tirumotecan-TAB	The CL of sacituzumab tirumotecan-TAB will be determined in participants from Arm 1.	Day 1: Preinfusion and 0.5, 2, 4, 8, 24, 48, and 72 hours postinfusion
Vz of sacituzumab tirumotecan-TAB	The Vz of sacituzumab tirumotecan-TAB will be determined in participants from Arm 1.	Day 1: Preinfusion and 0.5, 2, 4, 8, 24, 48, and 72 hours postinfusion
Rac of sacituzumab tirumotecan-TAB	The Rac of sacituzumab tirumotecan-TAB will be determined in participants from Arm 1.	Day 1: Preinfusion and 0.5, 2, 4, 8, 24, 48, and 72 hours postinfusion
Cmax of sacituzumab tirumotecan-ADC Coadministered with Pembrolizumab	The Cmax of sacituzumab tirumotecan-ADC when coadministered with pembrolizumab will be determined in participants from Arm 2.	Cycle 1 and 2: Days 1 and 29 preinfusion and 0.5 hours postinfusion (each cycle is 29 days)
Cmin of sacituzumab tirumotecan-ADC Coadministered with Pembrolizumab	The Cmin of sacituzumab tirumotecan-ADC when coadministered with pembrolizumab will be determined in participants from Arm 2.	Cycle 1 and 2: Days 1 and 29 preinfusion and 0.5 hours postinfusion (each cycle is 29 days)
Rac of sacituzumab tirumotecan-ADC Coadministered with Pembrolizumab	The Rac of sacituzumab tirumotecan-ADC when coadministered with pembrolizumab will be determined in participants from Arm 2.	Cycle 1 and 2: Days 1 and 29 preinfusion and 0.5 hours postinfusion (each cycle is 29 days)
Cmax of sacituzumab tirumotecan-TAB Coadministered with Pembrolizumab	The Cmax of sacituzumab tirumotecan-TAB when coadministered with pembrolizumab will be determined in participants from Arm 2.	Cycle 1 and 2: Days 1 and 29 preinfusion and 0.5 hours postinfusion (each cycle is 29 days)
Cmin of sacituzumab tirumotecan-TAB Coadministered with Pembrolizumab	The Cmin of sacituzumab tirumotecan-TAB when coadministered with pembrolizumab will be determined in participants from Arm 2.	Cycle 1 and 2: Days 1 and 29 preinfusion and 0.5 hours postinfusion (each cycle is 29 days)
Rac of sacituzumab tirumotecan-TAB Coadministered with Pembrolizumab	The Rac of sacituzumab tirumotecan-TAB when coadministered with pembrolizumab will be determined in participants from Arm 2.	Cycle 1 and 2: Days 1 and 29 preinfusion and 0.5 hours postinfusion (each cycle is 29 days)
Cmax of KL610023 Coadministered with Pembrolizumab	The Cmax of KL610023 (free payload) when sacituzumab tirumotecan is coadministered with pembrolizumab will be determined in participants from Arm 2.	Cycle 1 and 2: Days 1 and 29 preinfusion and 0.5 hours postinfusion (each cycle is 29 days)
Rac of KL610023 Coadministered with Pembrolizumab	The Rac of KL610023 (free payload) when sacituzumab tirumotecan is coadministered with pembrolizumab will be determined in participants from Arm 2.	Cycle 1 and 2: Days 1 and 29 preinfusion and 0.5 hours postinfusion (each cycle is 29 days)
Objective Response Rate (ORR)	ORR is defined as the percentage of participants with Complete Response (CR: disappearance of all target lesions) or Partial Response (PR: at least a 30% decrease in the sum of diameters of target lesions) per Response Evaluation Criteria In Solid Tumors Version 1.1 (RECIST1.1). The percentage of participants who experience CR or PR as assessed by Blinded Independent Central Review (BICR) will be presented.	Up to ~39 months
Duration of Response (DOR)	DOR is defined as the time from first documented evidence of CR or PR until disease progression or death due to any cause.	Up to ~39 months
Incidence of Antidrug Antibodies (ADA) to sacituzumab tirumotecan	The incidence of ADA will be determined in participants from Arm 1 and Arm 2.	Up to ~32 months
Incidence of Antidrug Antibodies (ADA) to pembrolizumab	The incidence of ADA will be determined in participants from Arm 2.	Up to ~32 months

Collaborators and Investigators

• Sponsor: Merck Sharp & Dohme LLC
• Investigators: Study Director: Medical Director, Merck Sharp & Dohme LLC

Publications and helpful links

Helpful Links

• Merck Clinical Trials Information

Study record dates

Study Major Dates

• Study Start (Actual): October 26, 2023
• Primary Completion (Estimated): June 30, 2026
• Study Completion (Estimated): January 29, 2027

Study Registration Dates

• First Submitted: September 15, 2023
• First Submitted That Met QC Criteria: September 15, 2023
• First Posted (Actual): September 22, 2023

Study Record Updates

• Last Update Posted (Actual): April 16, 2026
• Last Update Submitted That Met QC Criteria: April 15, 2026
• Last Verified: April 1, 2026

More Information

Terms related to this study

• Additional Relevant MeSH Terms: Neoplasms by Site; Neoplasms; Respiratory Tract Diseases; Lung Diseases; Respiratory Tract Neoplasms; Thoracic Neoplasms; Lung Neoplasms; Carcinoma, Bronchogenic; Bronchial Neoplasms; Carcinoma, Non-Small-Cell Lung; Parkinson Disease 4, Autosomal Dominant Lewy Body; Antineoplastic Agents, Immunological; Immune Checkpoint Inhibitors; Antineoplastic Agents; Molecular Mechanisms of Pharmacological Action; pembrolizumab
• Other Study ID Numbers: 2870-008; jRCT2031230356 (Registry Identifier: Japan Registry of Clinical Trials (jRCT))

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: YES
• IPD Plan Description: https://trialstransparency.msdclinicaltrials.com/pdf/ProcedureAccessClinicalTrialData.pdf

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No