Bispecific T-Cell Engager Tarlatamab and TROP2 Targeted Antibody Drug Conjugate Sacituzumab Govitecan in Previously Treated Extensive-Stage Small Cell Lung Cancer and Extrapulmonary Neuroendocrine Cancer

Part of paid clinical trials in Bethesda, Maryland.

Sponsor
National Cancer Institute (NCI)
Study ID
NCT07328490
Phase
PHASE1/PHASE2
Status
Withdrawn

Conditions

  • Extensive-Stage Small Cell Lung Cancer
  • Extrapulmonary Neuroendocrine Carcinoma
  • Small Cell Carcinoma

Eligibility Criteria

Sex
ALL
Age
18 Years - 120 Years
Healthy Volunteers
Not accepted

Interventions

  • Tarlatamab — DRUG
    For both Phase I and Phase II, participants will receive a step dose of 1 mg of Tarlatamab (IV) followed by a full dose of 10 mg starting 7 days later (i.e., step dosing phase). Cycle 1 will begin following the Tarlatamab step-dosing (i.e., 14 days after the first dose and 7 days after the second dose of Tarlatamab alone) with participants receiving a combination of Tarlatamab (full dose) and Sacituzumab Govitecan (IV 7.5 or 10 mg/Kg) on day 1, SG alone on day 8 and Tarlatamab alone on day 15 of every cycle (4-week cycles) for up to 2 years or until disease progression/death, development of intolerable side effects.
  • Sacituzumab Govitecan — DRUG
    For both Phase I and Phase II, participants will receive a step dose of 1 mg of Tarlatamab (IV) followed by a full dose of 10 mg starting 7 days later (i.e., step dosing phase). Cycle 1 will begin following the Tarlatamab step-dosing (i.e., 14 days after the first dose and 7 days after the second dose of Tarlatamab alone) with participants receiving a combination of Tarlatamab (full dose) and Sacituzumab Govitecan (IV 7.5 or 10 mg/Kg) on day 1, SG alone on day 8 and Tarlatamab alone on day 15 of every cycle (4-week cycles) for up to 2 years or until disease progression/death, development of intolerable side effects.

Study Details

Background: Small-cell lung cancer (SCLC) is the most deadly form of lung cancer. It kills at least 250,000 worldwide each year. Extra-pulmonary neuroendocrine cancer (EP-NEC) is a similar type of cancer that develops anywhere other than the lungs. EP-NEC is also very aggressive. Better treatments are needed for these cancers. Objective: To test 2 drugs (tarlatamab combined with sacituzumab govitecan \[SG\]) in people with SCLC or EP-NEC. Eligibility: People aged 18 years and older with SCLC or EP-NEC that either did not respond to or returned after treatment. Design: Participants will be screened with a physical exam, blood tests, heart function testing, and imaging scans. Both study drugs are given intravenously (through a needle in the arm). Participants will receive a small starter dose of tarlatamab (1 mg) 2 weeks before beginning regular treatment, followed by the full dose (10 mg) one week later. Treatment then follows a repeating 4-week cycle: tarlatamab (10 mg) on days 1 and 15, and sacituzumab govitecan (7.5 or 10 mg/kg) on days 1 and 8. Treatment continues for up to 2 years, unless the cancer worsens, the participant passes away, or side effects become too severe. Participants will have regular check-ups including physical exams, blood tests, and imaging scans to monitor safety and treatment response. Blood and tumor samples will be collected for research purposes. After stopping treatment, participants will return for a safety check at 30 days, then be contacted every 3 months to check on their health and survival. Those who stop treatment for reasons other than cancer progression will continue CT scans every 8 weeks until their disease progresses.

Key Dates

Start date
Apr 25, 2026
Status verified
Apr 2026
Primary completion
Apr 25, 2026
Completion
Apr 25, 2026

Study Design

Enrollment
0 participants (actual)
Allocation
NA
Intervention model
SEQUENTIAL
Primary purpose
TREATMENT

Arms

  • Experimental: 1/ Phase I
    Dose escalated Tarlatamab and Sacituzumab Govitecan
  • Experimental: 2/ Phase II
    Maximum tolerated dose (MTD) Tarlatamab and Sacituzumab Govitecan

Primary Outcome Measure

Phase I: Maximum Tolerated Dose (MTD) [ Time Frame: Dose Limiting Toxicity (DLT) period (C1D1 through C1D28) ]

Locations (1)

FacilityCityStateZIPSite coordinators
National Institutes of Health Clinical CenterBethesdaMaryland20892-

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By research site
National Institutes of Health Clinical Center· Bethesda, MD

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