NCT06780137 A Study to Evaluate the Safety and Efficacy of Gocatamig (MK-6070) and Ifinatamab Deruxtecan (I-DXd) in Participants With Relapsed/Refractory Extensive-Stage Small Cell Lung Cancer (MK-6070-002)

Eligibility & Interventions

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What to Expect as a Participant

You will actively receive the study intervention — which may be a drug, biologic, device, or procedure.

Phase 1 is the earliest stage of human testing — safety and dosage are the primary focus. Visits are frequent and medical supervision is intensive. You will be among the first people to receive this treatment.

This trial targets 327 participants in total. It began in 2025-02-27 with a primary completion date of 2029-04-27.

Brief Summary

Researchers are looking for new ways to treat people with extensive-stage small cell lung cancer (SCLC) that has relapsed or is refractory. Gocatamig is a new type of immunotherapy that uses a person's immune system to find and destroy cancer cells. Ifinatamab deruxtecan (also known as I-DXd) is a drug which binds to a specific target on cancer cells and delivers treatment to destroy those cells. Durvalumab is a different type of immunotherapy that also destroys cancer cells. Researchers want to know if giving gocatamig, I-DXd, and gocatamig with I-DXd or durvalumab can treat SCLC that did not respond or stopped responding to a prior treatment. The goals of this study are to learn: * If gocatamig alone, I-DXd alone, and gocatamig with I-DXd or durvalumab are safe and well tolerated * If people who receive gocatamig alone, I-DXd alone, and gocatamig with I-DXd or durvalumab have their SCLC get smaller or go away

Eligibility Criteria

Inclusion Criteria: * Has histologically or cytologically confirmed SCLC that is extensive stage (defined as Stage IV (T any, N any, M1a/b/c) following at least 1 prior line of systemic therapy that included platinum-based chemotherapy * Must be able to provide archival tumor tissue sample or fresh biopsy tissue sample * Human immunodeficiency virus (HIV) infected participants must have well controlled HIV on antiretroviral therapy (ART) Exclusion Criteria: * Pleural effusion, pericardial effusion, or ascites requiring recurrent drainage procedure * Any history of interstitial lung disease (ILD)/pneumonitis irrespective of steroid use except for a history of radiation pneumonitis that did not require steroids * Current history of ILD or clinical or radiographic suspicion of ILD for which the diagnosis of ILD cannot be ruled out * Has clinically severe pulmonary compromise resulting from intercurrent pulmonary illnesses * Active or history of immune deficiency with the exception of HIV-infected participants with well controlled HIV on ART * History within 6 months before the first dose of study intervention of coronary/peripheral artery bypass graft and/or any coronary/peripheral angioplasty or clinically significant cardiovascular disease such as myocardial infarction, symptomatic congestive heart failure (CHF) (New York Heart Association \> class II), and/or uncontrolled cardiac arrhythmia * History of arterial thrombosis (eg, stroke or transient ischemic attack) within 6 months before the first dose of study intervention * Active clinically significant infection requiring systemic therapy * History of allogeneic tissue/solid organ transplant * History of leptomeningeal disease * Received prior radiotherapy within 2 weeks of start of study intervention, or has radiation-related toxicities, requiring corticosteroids * Receiving chronic systemic steroid therapy (in dosing exceeding 10 mg daily of prednisone equivalent) or any other form of chronic immunosuppressive therapy within 7 days prior to the first dose of study intervention * Known additional malignancy that is progressing or has required active treatment within the past 3 years * Untreated or symptomatic brain metastases * Active viral hepatitis, defined as hepatitis A (hepatitis A virus immunoglobulin M \[IgM\] positive in the setting of associated signs/symptoms), hepatitis B (hepatitis B virus surface antigen \[HbsAg\] positive and/or detectable hepatitis B virus \[HBV\] deoxyribonucleic acid \[DNA\]), or hepatitis C (hepatitis C virus \[HCV\] antibody positive and detectable HCV ribonucleic acid). Participants with HBV with undetectable viral load after treatment are eligible. Participants with HCV with undetectable virus after treatment are eligible. * Part 1 only: Radiation therapy to the lung \>30 Gy within 6 months before the start of study intervention * Part 1 only: Abdominal radiation within 4 weeks before start of study intervention * Part 1 only: Anticancer hormonal treatment (except luteinizing hormone-releasing hormone \[LHRH\]) within 2 weeks before start of study intervention * Part 1 only: Systemic anticancer therapy (except antibody-based anticancer therapy) or investigational agents within 3 weeks or 5 half-lives, whichever is longer * Part 1 only: Antibody-based cancer therapy within 3 weeks before start of study intervention * Part 1 only: Chloroquine/hydroxychloroquine within 2 weeks before start of study intervention * Part 1 only: Clinically significant corneal disease * Part 1 only: Has other uncontrolled or significant protocol-specified cardiovascular disease

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