Relapsed/Refractory Small Cell Lung CancerPhase 2DeLLphi-301NCT05060016
A Phase 2 Study of Tarlatamab in Patients With Small Cell Lung Cancer (SCLC)
A Phase 2 study testing Tarlatamab in people with Relapsed/Refractory Small Cell Lung Cancer, run by Amgen at 80 sites in 18 countries.
Trial summary
The main aim of this study is to: evaluate safety and efficacy (per Response Evaluation Criteria in Solid Tumors version 1.1 [RECIST 1.1] by investigator) of 2 dose levels of tarlatamab for Part 1 only evaluate anti-tumor activity of tarlatamab as determined by objective response rate (ORR) per RECIST 1.1 by blinded… Read more about this study
- Who is it for?
- Ages 18 years and older
- Conditions the study is for
- Relapsed/Refractory Small Cell Lung Cancer
- What is being tested?
- Tarlatamab
- Type of treatment
- Injection or infusion
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 222 participants
- Where
- 80 sitesin 18 countries
- Study dates
- 1 Dec 2021to 30 Dec 2027
- Phase
- Phase 2
- Are there results?
- Not yet: the study is under way
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 years and older
- All sexes
- No healthy volunteers
- Adult, Older adult
Who may be able to join
- Participant has provided informed consent/assent prior to initiation of any study specific activities/procedures.
- Male and female participants ≥ 18 years of age (or legal adult age within country) at the time of signing the informed consent.
- Histologically or cytologically confirmed relapsed/refractory SCLC
- Participants who progressed or recurred following 1 platinum-based regimen and at least 1 other prior line of therapy.
- Participants willing to provide archived tumor tissue samples or willing to undergo pretreatment tumor biopsy.
- Eastern Cooperative Oncology Group (ECOG) performance status of 0 1.
Show all 9Show fewer
- Minimum life expectancy of 12 weeks.
- Measurable lesions as defined per RECIST 1.1 within 21 days prior to the first dose of tarlatamab.
- Participants with treated brain metastases are eligible provided they meet defined criteria.
Who cannot join
- Disease Related
- Untreated or symptomatic brain metastases and leptomeningeal disease.
- Has evidence of interstitial lung disease or active, non-infectious pneumonitis.
- Participants 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 per protocol.
- Other Medical Conditions
Show all 37Show fewer
- History of other malignancy within the past 2 years, with exceptions
- Myocardial infarction and/or symptomatic congestive heart failure (New York Heart Association > class II) within 12 months of first dose of tarlatamab.
- History of arterial thrombosis (eg, stroke or transient ischemic attack) within 12 months of first dose of tarlatamab.
- Participant with symptoms and/or clinical signs and/or radiographic signs that indicate an acute and/or uncontrolled active systemic infection within 7 days prior to the first dose of tarlatamab.
- Presence of any indwelling line or drain.
- History of hypophysitis or pituitary dysfunction.
- Exclusion of hepatitis infection based on the results and/or criteria per protocol.
- Major surgery within 28 days of first dose of tarlatamab.
- History or evidence of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection. Subject is eligible if no acute symptoms of coronavirus disease 2019 (COVID-19) within 14 days prior to first dose of tarlatamab (counted from day of positive test for asymptomatic subjects).
- Prior/Concomitant Therapy
- Participant received prior therapy with tarlatamab.
- Prior anti-cancer therapy within 28 days prior to first dose of tarlatamab.
- Has a diagnosis of immunodeficiency or is receiving systemic steroid therapy or any other form of immunosuppressive therapy within 7 days prior to the first dose of tarlatamab.
- The following vaccines (live and live-attenuated vaccines) are excluded during the following study periods:
- Screening and during study treatment: Live and live-attenuated vaccines are prohibited within 28 days prior to the first dose of tarlatamab and for the duration of the study. Live viral non-replicating vaccine (e.g. Jynneos) for Monkeypox infection is allowed during the study (except during cycle 1) in accordance with local standard of care and institutional guidelines.
- End of study treatment: Live and live-attenuated vaccines can be used when at least 42 days (5X half-life of tarlatamab) have passed after the last dose of tarlatamab.
- Other Exclusions
- Female participants of childbearing potential unwilling to use protocol specified method of contraception during treatment and for an additional 60 days after the last dose of tarlatamab.
- Female participants who are breastfeeding or who plan to breastfeed while on study through 60 days after the last dose of tarlatamab.
- Female participants planning to become pregnant while on study through 60 days after the last dose of tarlatamab.
- Female participants of childbearing potential with a positive pregnancy test assessed at screening and/or day 1 by a highly sensitive urine or serum pregnancy test.
- Male participants with a female partner of childbearing potential who are unwilling to practice sexual abstinence (refrain from heterosexual intercourse) or use contraception during treatment and for an additional 60 days after the last dose of tarlatamab.
- Male participants with a pregnant partner who are unwilling to practice abstinence or use a condom during treatment and for an additional 60 days after the last dose of tarlatamab.
- Male participants unwilling to abstain from donating sperm during treatment and for an additional 60 days after the last dose of tarlatamab.
- Participant has known sensitivity to any of the products or components to be administered during dosing.
- Participant likely to not be available to complete all protocol-required study visits or procedures, and/or to comply with all required study procedures.
- History or evidence of any other clinically significant disorder, condition or disease determined by the investigator or Amgen physician.
- Specific Exclusions to Part 3
- Participants unable to remain within one hour of study site for 48 hours after infusion of tarlatamab on Cycle 1 Day 1 and Cycle 1 Day 8.
- Participants unable to remain within one hour of any hospital for 72 hours after infusion of tarlatamab on Cycle 1 Day 1 and Cycle 1 Day 8.
- Unable to identify home companion who will cohabitate with participant for 72 hours after infusion of tarlatamab on Cycle 1 Day 1 and Cycle 1 Day 8.
Trial locations and contacts
80 sites in 18 countries.
80 sites in 18 countries
United States16 sites
Winship Cancer Institute
Atlanta, Georgia, 30332
University of Alabama at Birmingham
Birmingham, Alabama, 35249
Dana Farber - Harvard Cancer Center
Boston, Massachusetts, 02215
Oncology Hematology Care Inc
Cincinnati, Ohio, 45242
University Hospitals Cleveland Medical Center
Cleveland, Ohio, 44106
Henry Ford Health System
Detroit, Michigan, 48202
Duke University Medical Center
Durham, North Carolina, 27705
Dartmouth Hitchcock Medical Center
Hanover, New Hampshire, 03756
University of Iowa
Iowa City, Iowa, 52242
University of Arkansas for Medical Sciences
Little Rock, Arkansas, 72205
West Virginia University Health Sciences Center
Morgantown, West Virginia, 26506
Sarah Cannon Research Institute
Nashville, Tennessee, 37203
Christiana Care Health Services
Newark, Delaware, 19713
University of Pittsburgh Medical Center Cancer Pavillion
Pittsburgh, Pennsylvania, 15232
Moffitt Cancer Center
Tampa, Florida, 33612
Wake Forest Baptist Comprehensive Cancer Research Center
Winston-Salem, North Carolina, 27157
Greece8 sites
Henry Dunant Hospital Center
Athens, 11526
Sotiria General Hospital
Athens, 11527
Metropolitan Hospital
Athens, 18547
University Hospital of Heraklion
Heraklion - Crete, 71500
General Hospital of Patras Agios Andreas
Pátrai, 26335
Theagenion Cancer Hospital
Thessaloniki, 54007
Euromedica General Clinic of Thessaloniki
Thessaloniki, 54645
Agios Loukas Clinic
Thessaloniki, 55236
Spain8 sites
Hospital Universitari Vall d Hebron
Barcelona, Catalonia, 08035
Hospital Clinic i Provincial de Barcelona
Barcelona, Catalonia, 08036
Hospital de la Santa Creu i Sant Pau
Barcelona, Catalonia, 08041
Instituto Catalan de Oncologia Hospital Duran i Reynals
L'Hospitalet de Llobregat, Catalonia, 08908
Hospital Universitario 12 de Octubre
Madrid, 28041
Hospital Universitario Puerta de Hierro Majadahonda
Majadahonda, Madrid, 28222
Hospital Regional Universitario de Malaga
Málaga, Andalusia, 29011
Hospital Universitari i Politecnic La Fe
Valencia, Valencia, 46026
France7 sites
Centre Hospitalier Universitaire Nord
Marseille, 13915
Institut Curie
Paris, 75248
Centre Hospitalier Lyon Sud
Pierre-Bénite, 69495
Centre Hospitalier Universitaire de Rennes - Hopital Pontchaillou
Rennes, 35033
Centre Hospitalier Universitaire de Strasbourg - Nouvel Hopital Civil
Strasbourg, 67091
Centre Hospitalier Universitaire de Toulouse - Hopital Larrey
Toulouse, 31059
Institut Gustave Roussy
Villejuif, 94805
Japan7 sites
National Cancer Center Hospital East
Kashiwa-shi, Chiba, 277-8577
The Cancer Institute Hospital of Japanese Foundation for Cancer Research
Koto-ku, Tokyo, 135-8550
Aichi Cancer Center
Nagoya, Aichi-ken, 464-8681
Okayama University Hospital
Okayama, Okayama-ken, 700-8558
Kindai University Hospital
Osakasayama-shi, Osaka, 589-8511
Shizuoka Cancer Center
Sunto-gun, Shizuoka, 411-8777
Wakayama Medical University Hospital
Wakayama, Wakayama, 641-8510
South Korea6 sites
National Cancer Center
Goyang-si Gyeonggi-do, 10408
Seoul National University Bundang Hospital
Seongnam-si, Gyeonggi-do, 13620
Yonsei University Health System Severance Hospital
Seoul, 03722
Asan Medical Center
Seoul, 05505
Samsung medical center
Seoul, 06351
The Catholic University of Korea Seoul St Marys Hospital
Seoul, 06591
Portugal5 sites
Hospital da Luz, SA
Lisbon, 1500-650
Hospital CUF Descobertas
Lisbon, 1998-018
Centro Hospitalar Universitario do Porto EPE - Hospital de Santo Antonio
Porto, 4099-001
Hospital Cuf porto
Porto, 4100-180
Instituto Portugues de Oncologia do Porto Francisco Gentil, EPE
Porto, 4200-072
Belgium3 sites
Universitair Ziekenhuis Gent
Ghent, 9000
Grand Hopital de Charleroi - Site Saint Joseph
Gilly, 6060
Universitair Ziekenhuis Leuven - Campus Gasthuisberg
Leuven, 3000
Germany3 sites
Universitaetsklinikum Koeln
Cologne, 50937
LungenClinic Grosshansdorf GmbH
Großhansdorf, 22927
Universitaetsklinikum Wuerzburg
Würzburg, 97078
Italy3 sites
Azienda Ospedaliero-Universitaria di Parma
Parma, 43126
Istituti Fisioterapici Ospitalieri Regina Elena San Gallicano
Rome, 00144
Azienda Socio Sanitaria Territoriale dei Sette Laghi Ospedale di Circolo e Fondazione Macchi
Varese, 21100
Poland3 sites
Uniwersyteckie Centrum Kliniczne
Gdansk, 80-214
Centra Medyczne Medyceusz Sp zoo
Lodz, 91-053
Mazowieckie centrum leczenia
Otwock, 05-400
Austria2 sites
Universitaetsklinikum Krems
Krems, 3500
Landeskrankenhaus Salzburg
Salzburg, 5020
Netherlands2 sites
Leids Universitair Medisch Centrum
Leiden, 2333 ZA
Erasmus Medisch Centrum
Rotterdam, 3015 GD
Taiwan2 sites
Kaohsiung Chang Gung Memorial Hospital
Kaohsiung City, 83301
Taipei Veterans General Hospital
Taipei, 11217
United Kingdom2 sites
Sarah Cannon Research Institute UK
London, W1G 6AD
Christie Hospital
Manchester, M20 4BX
About this study
Official title: A Phase 2 Study Evaluating the Efficacy, Safety, Tolerability, and Pharmacokinetics of Tarlatamab in Subjects With Relapsed/Refractory Small Cell Lung Cancer After Two or More Prior Lines of Treatment (DeLLphi-301).
The main aim of this study is to:
- evaluate safety and efficacy (per Response Evaluation Criteria in Solid Tumors version 1.1 [RECIST 1.1] by investigator) of 2 dose levels of tarlatamab for Part 1 only
- evaluate anti-tumor activity of tarlatamab as determined by objective response rate (ORR) per RECIST 1.1 by blinded independent central review (BICR) for Part 1 and 2
- evaluate safety of reduced mandatory monitoring period in Cycle 1 at selected dose of tarlatamab for Part 3
- Being tested
- Tarlatamab
- Keywords
- Small Cell Lung Cancer, SCLC, AMG 757, Tarlatamab, IMDELLTRA^TM
- Medical subject headings
- Small Cell Lung Carcinoma
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
TarlatamabDrug
Intravenous (IV) infusion
| Study group | Role | What they receive |
|---|---|---|
| Part 1: Tarlatamab Low Dose | Experimental | Participants will receive the low dose of Tarlatamab. Receives: Drug: Tarlatamab |
| Part 1: Tarlatamab High Dose | Experimental | Participants will receive the high dose of Tarlatamab. Receives: Drug: Tarlatamab |
| Part 2: Dose Expansion | Experimental | Participants will receive the selected target dose of Tarlatamab based on findings in Part 1. Receives: Drug: Tarlatamab |
| Part 3: Modified Monitoring Substudy | Experimental | Participants will receive the selected target dose of Tarlatamab based on findings in Part 1 with reduced Cycle 1 monitoring requirements. Receives: Drug: Tarlatamab |
What is being measured
The primary outcome is the main question the study is designed to answer.
Part 1 Only: Objective Response (OR) per Response Evaluation Criteria in Solid Tumors (RECIST) version 1.1 by Investigator
Measured: Up to a maximum of 61 months
Part 1 and Part 3 Only: Number of Participants who Experience One or More Treatment-emergent Adverse Events
Measured: Up to a maximum of 61 months
Part 1 Only: Serum Concentrations of Tarlatamab
Measured: Up to a maximum of 24 months
Part 1 and Part 2 Only: Objective Response (OR) per Response Evaluation Criteria in Solid Tumors (RECIST) version 1.1 by Blinded Independent Central Review (BICR)
Measured: Up to a maximum of 61 months
Secondary outcomes (13)
Duration of Response (DOR) per Response Evaluation Criteria in Solid Tumors (RECIST) version 1.1 by Blinded Independent Central Review (BICR)
Measured: Up to a maximum of 73 months
Disease Control (DC) per Response Evaluation Criteria in Solid Tumors (RECIST) version 1.1 by Blinded Independent Central Review (BICR)
Measured: Up to a maximum of 73 months
Duration of Disease Control (DC) per Response Evaluation Criteria in Solid Tumors (RECIST) version 1.1 by Blinded Independent Central Review (BICR)
Measured: Up to a maximum of 73 months
Progression-free Survival (PFS) Response Evaluation Criteria in Solid Tumors (RECIST) version 1.1 by Blinded Independent Central Review (BICR)
Measured: Up to a maximum of 73 months
Objective Response (OR) per Response Evaluation Criteria in Solid Tumors (RECIST) version 1.1 by Investigator
Measured: Up to a maximum of 73 months
Duration of Response (DOR) per Response Evaluation Criteria in Solid Tumors (RECIST) version 1.1 by Investigator
Measured: Up to a maximum of 73 months
Disease Control (DC) per Response Evaluation Criteria in Solid Tumors (RECIST) version 1.1 by Investigator
Measured: Up to a maximum of 73 months
Duration of Disease Control (DC) per Response Evaluation Criteria in Solid Tumors (RECIST) version 1.1 by Investigator
Measured: Up to a maximum of 73 months
Progression-free Survival (PFS) per Response Evaluation Criteria in Solid Tumors (RECIST) version 1.1 by Investigator
Measured: Up to a maximum of 73 months
Overall Survival (OS) per Response Evaluation Criteria in Solid Tumors (RECIST) version 1.1 by Investigator
Measured: Up to a maximum of 73 months
Number of Participants who Experience One or More Treatment-emergent Adverse Events
Measured: Up to a maximum of 73 months
Serum Concentrations of Tarlatamab
Measured: Up to a maximum of 24 months
Number of Participants who Experience Anti-Tarlatamab Antibody Formation
Measured: Up to a maximum of 73 months
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted28 Sep 2021
- Study start1 Dec 2021
- Primary completion30 Dec 2027 (estimated)
- Study completion30 Dec 2027 (estimated)
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Publications (7)Papers the sponsor has linked to this study.
- Other trials for Relapsed/Refractory Small Cell Lung CancerStudies of the same condition, open and under way.
- More trials run by AmgenThe sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase 2
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Sequential
- Masking
- None (open label)
- Enrolment
- 222 participants (actual)
Sponsor and investigators
- Lead sponsor
- Amgen
- Sponsor type
- Industry (pharma, biotech, devices)
- Responsible party
- Sponsor
- Investigators
- MD, Study director, Amgen
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT05060016
- Sponsor's protocol ID
- 20200491
- Other IDs
- 2024-511837-37
- Acronym
- DeLLphi-301
- Status last verified
- Jul 2026
- First submitted
- 17 Sep 2021
- Last updated
- 22 Jul 2026
- Results posted
- No
- FDA-regulated drug
- Yes
- FDA-regulated device
- No
- Individual data sharing
- Yes: De-identified individual patient data for variables necessary to address the specific research question in an approved data sharing request
- Expanded access
- Available
Publications
Ahn MJ, Cho BC, Felip E, Korantzis I, Ohashi K, Majem M, Juan-Vidal O, Handzhiev S, Izumi H, Lee JS, Dziadziuszko R, Wolf J, Blackhall F, Reck M, Bustamante Alvarez J, Hummel HD, Dingemans AC, Sands J, Akamatsu H, Owonikoko TK, Ramalingam SS, Borghaei H, Johnson ML, Huang S, Mukherjee S, Minocha M, Jiang T, Martinez P, Anderson ES, Paz-Ares L; DeLLphi-301 Investigators. Tarlatamab for Patients with Previously Treated Small-Cell Lung Cancer. N Engl J Med. 2023 Nov 30;389(22):2063-2075. doi: 10.1056/NEJMoa2307980. Epub 2023 Oct 20.
PubMed 37861218Ahn MJ, Cho BC, Felip E, Korantzis I, Ohashi K, Majem M, Juan-Vidal O, Handzhiev S, Izumi H, Lee JS, Dziadziuszko R, Wolf J, Blackhall F, Reck M, Alvarez JB, Hummel HD, Dingemans AC, Sands J, Akamatsu H, Owonikoko TK, Ramalingam SS, Borghaei H, Johnson ML, Huang S, Mukherjee S, Minocha M, Jiang T, Martinez P, Anderson ES, Paz-Ares L. Plain language summary: tarlatamab for patients with previously treated small cell lung cancer. Future Oncol. 2024 Dec;20(40):3355-3364. doi: 10.1080/14796694.2024.2402152. Epub 2024 Nov 12.
PubMed 39530627Hummel HD, Ahn MJ, Blackhall F, Reck M, Akamatsu H, Ramalingam SS, Borghaei H, Johnson M, Dirnberger F, Cocks K, Huang S, Mukherjee S, Paz-Ares L. Patient-Reported Outcomes for Patients with Previously Treated Small Cell Lung Cancer Receiving Tarlatamab: Results from the DeLLphi-301 Phase 2 Trial. Adv Ther. 2025 Apr;42(4):1950-1964. doi: 10.1007/s12325-025-03136-4. Epub 2025 Mar 3.
PubMed 40025391Kong S, Minocha M, Chen PW, Martinez P, Anderson ES, Parkes A, Houk BE, Lin CW. Population Pharmacokinetics of Tarlatamab, a Half-Life Extended DLL3-Directed Bispecific T-Cell Engager in Patients with Previously Treated Small Cell Lung Cancer. Clin Pharmacokinet. 2025 May;64(5):729-741. doi: 10.1007/s40262-025-01499-z. Epub 2025 Apr 22.
PubMed 40261494Ahn MJ, Cho BC, Ohashi K, Izumi H, Lee JS, Han JY, Chiang CL, Huang S, Hamidi A, Mukherjee S, Xu KL, Akamatsu H. Asian Subgroup Analysis of Patients in the Phase 2 DeLLphi-301 Study of Tarlatamab for Previously Treated Small Cell Lung Cancer. Oncol Ther. 2025 Dec;13(4):1041-1054. doi: 10.1007/s40487-025-00372-0. Epub 2025 Sep 4.
PubMed 40908346Chen PW, Minocha M, Kong S, Jiang T, Anderson ES, Parkes A, Martinez P, Houk BE, Lin CW. Tarlatamab Exposure-Efficacy and Exposure-Safety Relationships to Inform Dose Selection in Patients with Small Cell Lung Cancer. Clin Cancer Res. 2025 Nov 14;31(22):4688-4697. doi: 10.1158/1078-0432.CCR-25-2134.
PubMed 40928991Dirnberger F, Wang J, King-Kallimanis B, Cocks K, Skingley G, Clarke N, Huang S, Mukherjee S, Koller M. Derivation of Meaningful Change Thresholds for European Organization for Research and Treatment of Cancer QLQ-C30 and QLQ-LC13 in Patients With Small-Cell Lung Cancer. Value Health. 2026 Feb;29(2):223-232. doi: 10.1016/j.jval.2025.09.011. Epub 2025 Sep 25.
PubMed 41015335
Study at a glance
From the registry record, last updated by the sponsor on 22 Jul 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- A Phase 2 Study Evaluating the Efficacy, Safety, Tolerability, and Pharmacokinetics of Tarlatamab in Subjects With Relapsed/Refractory Small Cell Lung Cancer After Two or More Prior Lines of Treatment (DeLLphi-301).
- ClinicalTrials.gov ID
- NCT05060016
- Acronym / sponsor ID
- DeLLphi-301 / 20200491
- Keywords
- Small Cell Lung Cancer, SCLC, AMG 757, Tarlatamab, IMDELLTRA^TM
- Phase
- Phase 2
- Study type
- Interventional
- Recruitment status
- Active, not recruiting
- Enrolment
- 222 participants (actual)
- Lead sponsor
- AmgenIndustry (pharma, biotech, devices)
- Study start
- 1 Dec 2021 (actual)
- Primary completion
- 30 Dec 2027 (estimated)
- Study completion
- 30 Dec 2027 (estimated)
- First posted
- 28 Sep 2021 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
The main aim of this study is to:
- evaluate safety and efficacy (per Response Evaluation Criteria in Solid Tumors version 1.1 [RECIST 1.1] by investigator) of 2 dose levels of tarlatamab for Part 1 only
- evaluate anti-tumor activity of tarlatamab as determined by objective response rate (ORR) per RECIST 1.1 by blinded independent central review (BICR) for Part 1 and 2
- evaluate safety of reduced mandatory monitoring period in Cycle 1 at selected dose of tarlatamab for Part 3
Study design
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Sequential
- Masking
- None (open label)
- Number of arms
- 4
| Arm | Type | Receives |
|---|---|---|
| Part 1: Tarlatamab Low Dose | Experimental | Drug: TarlatamabParticipants will receive the low dose of Tarlatamab. |
| Part 1: Tarlatamab High Dose | Experimental | Drug: TarlatamabParticipants will receive the high dose of Tarlatamab. |
| Part 2: Dose Expansion | Experimental | Drug: TarlatamabParticipants will receive the selected target dose of Tarlatamab based on findings in Part 1. |
| Part 3: Modified Monitoring Substudy | Experimental | Drug: TarlatamabParticipants will receive the selected target dose of Tarlatamab based on findings in Part 1 with reduced Cycle 1 monitoring requirements. |
Who may qualify
- Ages
- 18 years and older
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (9 listed)
- Participant has provided informed consent/assent prior to initiation of any study specific activities/procedures.
- Male and female participants ≥ 18 years of age (or legal adult age within country) at the time of signing the informed consent.
- Histologically or cytologically confirmed relapsed/refractory SCLC
- Participants who progressed or recurred following 1 platinum-based regimen and at least 1 other prior line of therapy.
- Participants willing to provide archived tumor tissue samples or willing to undergo pretreatment tumor biopsy.
Key exclusion criteria (37 listed)
- Disease Related
- Untreated or symptomatic brain metastases and leptomeningeal disease.
- Has evidence of interstitial lung disease or active, non-infectious pneumonitis.
- Participants 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 per protocol.
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| TarlatamabIntravenous (IV) infusion | Drug | Part 1: Tarlatamab High Dose, Part 1: Tarlatamab Low Dose, Part 2: Dose Expansion, Part 3: Modified Monitoring Substudy |
Primary outcome
Part 1 Only: Objective Response (OR) per Response Evaluation Criteria in Solid Tumors (RECIST) version 1.1 by Investigator
Time frame: Up to a maximum of 61 months
Part 1 and Part 3 Only: Number of Participants who Experience One or More Treatment-emergent Adverse Events
Time frame: Up to a maximum of 61 months
Part 1 Only: Serum Concentrations of Tarlatamab
Time frame: Up to a maximum of 24 months
Part 1 and Part 2 Only: Objective Response (OR) per Response Evaluation Criteria in Solid Tumors (RECIST) version 1.1 by Blinded Independent Central Review (BICR)
Time frame: Up to a maximum of 61 months
13 secondary outcomes
Duration of Response (DOR) per Response Evaluation Criteria in Solid Tumors (RECIST) version 1.1 by Blinded Independent Central Review (BICR)
Time frame: Up to a maximum of 73 months
Disease Control (DC) per Response Evaluation Criteria in Solid Tumors (RECIST) version 1.1 by Blinded Independent Central Review (BICR)
Time frame: Up to a maximum of 73 months
Duration of Disease Control (DC) per Response Evaluation Criteria in Solid Tumors (RECIST) version 1.1 by Blinded Independent Central Review (BICR)
Time frame: Up to a maximum of 73 months
Progression-free Survival (PFS) Response Evaluation Criteria in Solid Tumors (RECIST) version 1.1 by Blinded Independent Central Review (BICR)
Time frame: Up to a maximum of 73 months
Objective Response (OR) per Response Evaluation Criteria in Solid Tumors (RECIST) version 1.1 by Investigator
Time frame: Up to a maximum of 73 months
Duration of Response (DOR) per Response Evaluation Criteria in Solid Tumors (RECIST) version 1.1 by Investigator
Time frame: Up to a maximum of 73 months
Disease Control (DC) per Response Evaluation Criteria in Solid Tumors (RECIST) version 1.1 by Investigator
Time frame: Up to a maximum of 73 months
Duration of Disease Control (DC) per Response Evaluation Criteria in Solid Tumors (RECIST) version 1.1 by Investigator
Time frame: Up to a maximum of 73 months
Progression-free Survival (PFS) per Response Evaluation Criteria in Solid Tumors (RECIST) version 1.1 by Investigator
Time frame: Up to a maximum of 73 months
Overall Survival (OS) per Response Evaluation Criteria in Solid Tumors (RECIST) version 1.1 by Investigator
Time frame: Up to a maximum of 73 months
Number of Participants who Experience One or More Treatment-emergent Adverse Events
Time frame: Up to a maximum of 73 months
Serum Concentrations of Tarlatamab
Time frame: Up to a maximum of 24 months
Number of Participants who Experience Anti-Tarlatamab Antibody Formation
Time frame: Up to a maximum of 73 months
Results and safety
This study is still under way. Results are not available in the source record yet.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 22 Jul 2026.
- Background: PubMed 37861218Ahn MJ, Cho BC, Felip E, Korantzis I, Ohashi K, Majem M, Juan-Vidal O, Handzhiev S, Izumi H, Lee JS, Dziadziuszko R, Wolf J, Blackhall F, Reck M, Bustamante Alvarez J, Hummel HD, Dingemans AC, Sands J, Akamatsu H, Owonikoko TK, Ramalingam SS, Borghaei H, Johnson ML, Huang S, Mukherjee S, Minocha M, Jiang T, Martinez P, Anderson ES, Paz-Ares L; DeLLphi-301 Investigators. Tarlatamab for Patients with Previously Treated Small-Cell Lung Cancer. N Engl J Med. 2023 Nov 30;389(22):2063-2075. doi: 10.1056/NEJMoa2307980. Epub 2023 Oct 20.
- Background: PubMed 39530627Ahn MJ, Cho BC, Felip E, Korantzis I, Ohashi K, Majem M, Juan-Vidal O, Handzhiev S, Izumi H, Lee JS, Dziadziuszko R, Wolf J, Blackhall F, Reck M, Alvarez JB, Hummel HD, Dingemans AC, Sands J, Akamatsu H, Owonikoko TK, Ramalingam SS, Borghaei H, Johnson ML, Huang S, Mukherjee S, Minocha M, Jiang T, Martinez P, Anderson ES, Paz-Ares L. Plain language summary: tarlatamab for patients with previously treated small cell lung cancer. Future Oncol. 2024 Dec;20(40):3355-3364. doi: 10.1080/14796694.2024.2402152. Epub 2024 Nov 12.
- Background: PubMed 40025391Hummel HD, Ahn MJ, Blackhall F, Reck M, Akamatsu H, Ramalingam SS, Borghaei H, Johnson M, Dirnberger F, Cocks K, Huang S, Mukherjee S, Paz-Ares L. Patient-Reported Outcomes for Patients with Previously Treated Small Cell Lung Cancer Receiving Tarlatamab: Results from the DeLLphi-301 Phase 2 Trial. Adv Ther. 2025 Apr;42(4):1950-1964. doi: 10.1007/s12325-025-03136-4. Epub 2025 Mar 3.
- Background: PubMed 40261494Kong S, Minocha M, Chen PW, Martinez P, Anderson ES, Parkes A, Houk BE, Lin CW. Population Pharmacokinetics of Tarlatamab, a Half-Life Extended DLL3-Directed Bispecific T-Cell Engager in Patients with Previously Treated Small Cell Lung Cancer. Clin Pharmacokinet. 2025 May;64(5):729-741. doi: 10.1007/s40262-025-01499-z. Epub 2025 Apr 22.
- Background: PubMed 40908346Ahn MJ, Cho BC, Ohashi K, Izumi H, Lee JS, Han JY, Chiang CL, Huang S, Hamidi A, Mukherjee S, Xu KL, Akamatsu H. Asian Subgroup Analysis of Patients in the Phase 2 DeLLphi-301 Study of Tarlatamab for Previously Treated Small Cell Lung Cancer. Oncol Ther. 2025 Dec;13(4):1041-1054. doi: 10.1007/s40487-025-00372-0. Epub 2025 Sep 4.
- Background: PubMed 40928991Chen PW, Minocha M, Kong S, Jiang T, Anderson ES, Parkes A, Martinez P, Houk BE, Lin CW. Tarlatamab Exposure-Efficacy and Exposure-Safety Relationships to Inform Dose Selection in Patients with Small Cell Lung Cancer. Clin Cancer Res. 2025 Nov 14;31(22):4688-4697. doi: 10.1158/1078-0432.CCR-25-2134.
- Background: PubMed 41015335Dirnberger F, Wang J, King-Kallimanis B, Cocks K, Skingley G, Clarke N, Huang S, Mukherjee S, Koller M. Derivation of Meaningful Change Thresholds for European Organization for Research and Treatment of Cancer QLQ-C30 and QLQ-LC13 in Patients With Small-Cell Lung Cancer. Value Health. 2026 Feb;29(2):223-232. doi: 10.1016/j.jval.2025.09.011. Epub 2025 Sep 25.
- AmgenTrials clinical trials websiteLink provided by the sponsor.
- Individual participant dataSharing planned: Yes. De-identified individual patient data for variables necessary to address the specific research question in an approved data sharing request
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
MD study director
Amgen
80 sites in 18 countries: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A Phase 2 study testing Tarlatamab in people with Relapsed/Refractory Small Cell Lung Cancer, run by Amgen at 80 sites in 18 countries.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 9 inclusion and 37 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: under way, not looking for participants, as of the sponsor's last update on 22 Jul 2026. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 80 sites in United States, Greece, Spain, France, Japan and 13 more countries. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
What does this phase mean?
Phase 2 studies give the treatment to a larger group to see whether it has the intended effect and to keep checking safety.
Not every study follows the same path, and some studies (observational studies, device studies) have no phase.
Are results available for this study?
This study is still under way. Results are not available in the source record yet.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Part 1 Only: Objective Response (OR) per Response Evaluation Criteria in Solid Tumors (RECIST) version 1.1 by Investigator (time frame: Up to a maximum of 61 months). The study lists 4 primary outcomes in all. It is what the study was designed to measure, not a finding.
Where can I read the original study information?
On the ClinicalTrials.gov record for NCT05060016, which also lists 7 linked publications.
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 22 Jul 2026.