Radiation Combined With BIspecific T-Cell Engager in DLL3 Expressing Tumors (NCT06814496) | Clinical Trial Compass
RecruitingPhase 1/2
Radiation Combined With BIspecific T-Cell Engager in DLL3 Expressing Tumors
United States30 participantsStarted 2025-09-08
Plain-language summary
Phase I study to examine safety of the addition of concurrent tarlatamab with standard palliative and consolidative RT regimens , with a main cohort of N=20-24 patients with extracranial anatomic radiation sites.
I) After lead in of 10 patients demonstrating safety of treatment, allow for expansion to cranial sites of disease (N=6-10) with continued enrollment in main cohort II) If toxicity criteria is not met in concurrent RT tarlatamab cohort, we will continue with sequential RT, either A) delivered within 7 days prior to cycle 1 day 1, or B) delivered during cycle 1 -2 but with pre- and post-RT washout of 7 days with no drug during RT, to examine safety in a temporally spaced setting.
III) If sequential tarlatamab and radiation is not deemed safe, we would allow for continued enrollment to assess efficacy of drug sans radiation treatment, enriching for tumors not of small cell lung cancer histology and allowing for patients without sites amenable to RT.
A nested phase II study will attempt to assess for ORR and safety of study intervention amongst tumors not of small cell lung cancer histology.
Who can participate
Age range
18 Years – 99 Years
Sex
ALL
See this in plain English?
AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.
Inclusion criteria
. Subject has provided informed consent/assent prior to initiation of any study specific activities/procedures.
. Subjects ≥ 18 years of age at the time of signing the informed consent.
. Histologically or cytologically confirmed relapsed/refractory:
. SCLC
. Other tumors of small cell histology
. High grade / poorly differentiated neuroendocrine histology tumor histologies with high prevalence of DLL3 (≥50% prevalence of ≥1% positivity), including but not limited to: melanoma, medullary thyroid cancer, esthesioneuroblastoma, bladder cancer, testicular cancer, glioblastoma multiforme, cervical cancer; large cell neuroendocrine tumor of lung, non-small cell lung cancers with mixed neuroendocrine features, and Merkel cell carcinoma OR
Questions worth asking your doctor
Bring these to your next appointment. They're a starting point for a shared conversation — not a sign you qualify or a recommendation to enrol.
1Based on my diagnosis and history, is this trial worth exploring for me — or is there a standard treatment we should try first?
2What does this trial's phase tell us about how much is already known about its safety and benefit?
3What would taking part actually involve for me — visits, tests, time, and travel?
4What are the known and possible risks or side effects I should weigh, and how would they be monitored?
5If this trial isn't the right fit, what other options or trials would you suggest I look into?
Generated to help you prepare — always confirm anything about your own eligibility and care with the study team and your doctor.
Questions for the trial coordinator
The trial coordinator is the person who runs the study day to day. These cover the practical side — logistics, costs, and what taking part would actually mean for your life. The study team confirms whether you meet the criteria; these are questions to ask, not a sign you qualify.
1What does taking part actually involve week to week — how many visits, where, and how long does each one take?
2What costs are covered by the study, and what might I have to pay for myself, including travel, parking, or time off work?
3What happens during screening, and what happens if the study team confirms I don't meet the criteria after those tests?
4Who pays for the scans, blood work, and other tests the trial requires — the study, my insurance, or me?
5How will being in the trial affect my regular care, and will my own doctor stay informed and involved?
6Can I leave the trial at any point if I change my mind, and what would happen to my care if I do?
A starting point for the conversation — always confirm anything about your own eligibility, costs, and care with the study team and your doctor.
What they're measuring
1
Percentage of participants experiencing dose limiting toxicities (DLT) attributed to radiation or combination of radiation and tarlatamab.
Timeframe: Until radiographic or disease progression or up to 24 months, whichever is earlier.
. Has evidence of interstitial lung disease or active, non-infectious pneumonitis.
. Subjects who experienced recurrent pneumonitis (grade 2 or higher) or severe, life-threatening immune-mediated adverse events or infusion-related reactions including those that lead to permanent discontinuation while on treatment with immuno-oncology agents.
. Unresolved toxicity from prior anti-tumor therapy, defined as not having resolved to Common Terminology Criteria for Adverse Events (CTCAE) version 5.0 grade 1, or to levels dictated in the eligibility criteria with the exception of alopecia or toxicities from prior anti-tumor therapy that are considered irreversible (defined as having been present and stable for \> 21 days) which may be allowed if they are not otherwise described in the exclusion criteria AND there is agreement to allow by both the investigator and Amgen.
. Myocardial infarction and/or symptomatic congestive heart failure (New York Heart Association \> class II) within 12 months of first dose of tarlatamab.