Merck Sharp & Dohme LLC
Researchers are looking for new ways to treat extensive-stage small cell lung cancer (ES-SCLC). ES-SCLC is a type of lung cancer that has spread throughout the lung, to the other lung, or to other parts of the body. A standard (usual) treatment for ES-SCLC uses both chemotherapy and immunotherapy. * Chemotherapy is a treatment that works to destroy cancer cells or stop them from growing. * Immunotherapy is a treatment that helps the immune system fight cancer. Gocatamig and I-DXd (short for ifinatamab deruxtecan) are study medicines. Researchers want to know if giving gocatamig and I-DXd together can treat ES-SCLC. Researchers will also look at giving the study medicines with standard treatment. Gocatamig is a T-cell engager therapy. I-DXd is an antibody drug conjugate. * T-cell engager therapy is a certain type of immunotherapy that uses T-cells to find and destroy cancer cells. * A T-cell is a type of white blood cell, which are cells that help the body fight infection. * An antibody drug conjugate (ADC) is a treatment that attaches to a protein on cancer cells and delivers treatment to destroy those cells. The goals of this study are to learn: * About the safety of combining gocatamig and I-DXd and if people tolerate them together * If people who receive gocatamig and I-DXd have ES-SCLC respond, which means the cancer gets smaller or goes away
In Part A, participants will be allocated to Arm 1 or Arm 2 per investigator's discretion. In Part B, participants will be allocated to Arm 1 per investigator's discretion and randomized to Arms 2, 3, and 4.
Inclusion Criteria: The main inclusion criteria include but are not limited to the following: * Has a histologically or cytologically confirmed diagnosis of extensive-stage small cell lung cancer (ES-SCLC) * For participants receiving gocatamig + ifinatamab deruxtecan (I-DXd) in maintenance only: * Completed 3 to 4 cycles of platinum + etoposide chemotherapy with concurrent approved anti-programmed cell death 1/Ligand 1 (anti PD-1/L1) as first line (1L) treatment of ES-SCLC within 6 weeks prior to enrollment * No radiological disease progression per Response Evaluation Criteria In Solid…
Intravenous (IV) administration
IV administration
IV administration
IV administration
IV administration
Participants will receive rescue medications at the investigator's discretion. Recommended rescue medications include tocilizumab for treatment of cytokine release syndrome (CRS); dexamethasone, acetaminophen, and diphenhydramine for CRS/infusion-related reaction (IRR) prophylaxis; and 5-hydroxytryptamine 3 (5-HT3) receptor antagonist, neurokinin 1 (NK-1) receptor antagonist, and corticosteroid for prevention of nausea and vomiting.