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Taking people in Hong KongPhase 2

Pembrolizumab with MK-1084 for lung cancer with a KRAS G12C mutation

Tests MK-1084 with pembrolizumab in adults with advanced non-small cell lung cancer.

Key facts

Who runs it
Merck Sharp & Dohme LLC
Where
Central, Hong Kong, and Kowloon, Hong KongSee the 3 sitesAlso in 13 other countries, 42 sites
Trial code
Registry title
KEYMAKER-U01 Substudy 01J: A Study of Pembrolizumab Plus MK-1084 in Participants With Non-Small Cell Lung Cancer (NSCLC) With Kirsten Rat Sarcoma Viral Oncogene Homolog (KRAS) G12C Mutations (MK-3475-01J/KEYMAKER-U01J)
Status
Recruiting
Phase
Phase 2
People taking part
140 people, planned
Started
19 Dec 2025
Expected to end
31 May 2032
Type of study
Interventional, 3 groups
Treatments tested
  • MK-1084
  • Pembrolizumab
  • Cetuximab
  • Sacituzumab tirumotecan (sac-TMT)
  • Rescue medication
Record updated
10 November 2026

Who can take part

AI summary

From the trial's eligibility criteria. Machine-read from the registry text on this page, so it can be wrong. The registry text below and the trial team decide who can take part.

The trial is looking for adults with advanced or metastatic nonsquamous non-small cell lung cancer that has a KRAS G12C gene change, who have not had earlier drug treatment for it.

Age
18 years and older
Sex
All sexes can join.
Disease stage
Advanced or metastatic nonsquamous non-small cell lung cancer.
Earlier treatment
No earlier systemic anticancer treatment for advanced or metastatic lung cancer. No earlier treatment with a drug that targets KRAS.
Biomarker or test result
KRAS G12C mutation shown in tumor tissue or in circulating tumor DNA (ctDNA).

Main reasons for not taking part

  • Small cell lung cancer, or a mixed tumor with small cell parts
  • Active cancer spread to the brain or spinal fluid (CNS metastases or carcinomatous meningitis)
  • History of a stem cell or solid organ transplant
  • Active autoimmune disease that needed systemic treatment in the past 2 years
  • History of pneumonitis or interstitial lung disease that needed steroids, or current lung inflammation

The registry criteria, word for word

Show all 26 criteriaShow less

Who can take part

  • The main inclusion criteria include but are not limited to the following:
  • Has histologically or cytologically confirmed diagnosis of advanced or metastatic nonsquamous Non-Small Cell Lung Cancer (NSCLC)
  • Has tumor tissue or circulating tumor deoxyribonucleic acid (ctDNA) that demonstrates the presence of Kirsten rat sarcoma viral oncogene homolog (KRAS) G12C mutations
  • Can provide an archival tumor tissue sample or newly obtained core, incisional, excisional biopsy of a tumor lesion not previously irradiated
  • Has recovered to ≤Grade 1 or baseline from any Adverse events (AEs) due to previous anticancer therapies and/or ≤Grade 2 neuropathy and/or endocrine-related AEs adequately treated with hormone replacement
  • Has well controlled human immunodeficiency virus (HIV) on antiretroviral therapy (ART) if HIV-infected
  • Has undetectable hepatitis B (HBV) viral load and have received HBV antiviral therapy for at least 4 weeks if hepatitis B surface antigen (HBsAg) positive
  • Has undetectable hepatitis C (HCV) viral load if HCV-infected

Who cannot take part

  • Has active inflammatory bowel disease requiring immunosuppressive medication or previous clear history of inflammatory bowel disease
  • Has received prior systemic anticancer therapy for advanced or metastatic NSCLC
  • Has received any prior immunotherapy and was discontinued from that treatment due to a Grade 3 or higher immune-related adverse event (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
  • Has received previous treatment with an agent targeting KRAS
  • Has received prior systemic anticancer therapy within 4 weeks or 5 half-lives (whichever is shorter) and has not recovered to grade ≤ 1 or baseline from AE associated with anticancer therapy before allocation/randomization
  • Has received radiation therapy to the lung that is >30 Gray within 6 months of start of study intervention
  • Has a 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 to the first dose of study intervention
  • Has not adequately recovered from major surgery or has ongoing surgical complications
  • Has a diagnosis of small cell lung cancer or, for mixed tumors, presence of small cell elements
  • Has HIV-infection with a history of Kaposi's sarcoma and/or Multicentric Castleman's Disease
  • 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 a known additional malignancy that is progressing or has required active treatment within the past 3 years
  • Has an active autoimmune disease that has required systemic treatment in the past 2 years. Replacement therapy (eg, thyroxine, insulin, or physiologic corticosteroid) is allowed
  • Has a history of (noninfectious) pneumonitis/interstitial lung disease (ILD) that required steroids, has current pneumonitis/ILD, or has suspected ILD or pneumonitis that cannot be ruled out by standard diagnostic assessments at screening
  • Has a history of stem cell/solid organ transplant
  • Has uncontrolled, clinically 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 corrected QT interval corrected for heart rate by Fridericia's formula (QTcF) interval to >470 ms, and/or other serious cardiovascular and cerebrovascular diseases within the 6 months preceding study intervention
  • The main exclusion criteria include but are not limited to the following:
  • Has a known active central nervous system (CNS) metastases and/or carcinomatous meningitis

Where in Hong Kong

Also in 13 other countries, 42 sites

  • Hong Kong Integrated Oncology Centre (Site 0232)Central, Hong KongContact: Study CoordinatorTaking people
  • Queen Mary Hospital (Site 0230)Hong Kong, Hong KongContact: Study CoordinatorTaking people
  • Hong Kong United Oncology Centre (Site 0231)Kowloon, Hong KongContact: Study CoordinatorTaking people

About the trial

What the trial wants to find out

Researchers want to learn if using a study medicine called MK-1084 can help treat Non-Small Cell Lung Cancer (NSCLC). MK-1084 is a type of treatment called targeted therapy for the Kirsten rat sarcoma viral oncogene homolog (KRAS) G12C gene change. The goal of this study is to learn about the safety of MK-1084 and to learn how many people have the cancer get smaller or go away during the study treatment.

The 3 groups in the trial

  • Arm A- Pembrolizumab + MK-1084Treatment being tested

    Participants receive 400 mg of Pembrolizumab every 6 weeks and MK-1084 dose regimen.

    Treatment: MK-1084 and Pembrolizumab

  • Arm B- Pembrolizumab + MK-1084 + CetuximabTreatment being tested

    Participants receive 400 mg of Pembrolizumab every 6 weeks, MK-1084 dose regimen, and Cetuximab 500 mg/m\^2 every 2 weeks.

    Treatment: MK-1084, Pembrolizumab, and Cetuximab

  • Arm C- Pembrolizumab + MK-1084 + sacituzumab tirumotecan (sac-TMT)Treatment being tested

    Participants receive 400 mg of Pembrolizumab every 6 weeks, MK-1084 dose regimen, and 4 mg/kg sacituzumab tirumotecan (sac-TMT) every 2 weeks.

    Treatment: MK-1084, Pembrolizumab, Sacituzumab tirumotecan (sac-TMT), and Rescue medication

Questions to ask the study team

  1. How often do I need to come in, and for how long each time?
  2. Are travel costs paid?
  3. Can I keep my own doctor?
  4. What happens if I want to stop?

Contact the study team: see the registry record → Contacts and Locations

Print a page for my doctor

Data and sources

Registry record
Listed on ClinicalTrials.gov and on the EU's official list of trials (CTIS).
Official title
KEYMAKER-U01 Substudy 01J: A Randomized Phase 2 Umbrella Study With Rolling Arms of Investigational Agents for First-line Treatment of Participants With Advanced or Metastatic Nonsquamous Non-small Cell Lung Cancer (NSCLC) With KRAS G12C Mutations
Plain-language title
Pembrolizumab with MK-1084 for lung cancer with a KRAS G12C mutationGenerated from the registry record. The registry title is the official one.
AI summary
From the trial's eligibility criteria. Read by machine on 12 November 2026.
Record updated
10 November 2026