A Study of TRB191 in Patients With Extensive-stage Small Cell Lung Cancer

November 12, 2026 updated by: Novartis Pharmaceuticals

A Phase I, Open-label, Multi-center Study of TRB191 in Patients With Extensive Stage Small Cell Lung Cancer

The purpose of this study is to characterize the safety, tolerability, pharmacokinetics (PK), immunogenicity (IG) and preliminary anti-tumor activity and to determine a recommended dose (RD) of TRB191 in patients with extensive-stage small cell lung cancer (ES-SCLC).

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Recruiting

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Detailed Description

This is a phase I, open-label, multi-center, first-in-human (FIH) study of TRB191 in adult patients with ES-SCLC. The study is comprised of a dose escalation part followed by a dose expansion part in second-line and beyond (2L+) ES-SCLC patients.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Enrollment (Estimated)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
120

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Phase 1

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Study Contact

The name and contact information for the person who can answer enrollment questions for a clinical study. Each location where the study is being conducted may also have a specific contact, who may be better able to answer those questions.

Study Contact Backup

  • Name: Novartis Pharmaceuticals
  • Phone Number: +41613241111

Study Locations

  • Israel
      • Tel Aviv, Israel, 6423906
        • Recruiting
        • Novartis Investigative Site

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

18 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • Age ≥ 18 years old
  • Histologically or cytologically confirmed and documented ES-SCLC
  • Dose escalation: Patients with ES-SCLC and disease progression after one or more chemotherapy regimens (with or without PD-L1 inhibitor) according to the local standard of care (SOC). Prior treatment with a DLL3-targeted therapy is allowed, except in cohorts designed to evaluate TRB191 in patients who are naïve to prior DLL3-targeted therapy
  • Dose expansion: Patients with ES-SCLC and disease progression after one or more chemotherapy regimens (with or without PD-L1 inhibitor), according to the local SOC. Patients must have received prior treatment with tarlatamab

Exclusion Criteria:

  • Patients with inadequate bone marrow function and/or organ functions with out-of-range laboratory values
  • Impaired cardiac function or clinically significant cardiac disease
  • Presence of symptomatic central nervous system (CNS) metastases or CNS metastases requiring local therapy or increasing doses of corticosteroids within 2 weeks prior to study entry
  • Treatment with anti-cancer therapies prior to the first dose of study treatment within the stated timeframes
  • Pregnant or nursing woman, and women of child-bearing potential, defined as all women physiologically capable of becoming pregnant, unless they are using highly effective methods of contraception

Other protocol-defined inclusion/exclusion criteria may apply.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: N/A
  • Interventional Model: Single Group Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Experimental: TRB191 single agent

Treatment with TRB191 single agent in patients with extensive-stage small cell lung cancer.
Drug: TRB191

Subcutaneous injection of TRB191

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
Dose intensity
Time Frame: Up to approximately 24 months

Dose intensity defined as the ratio of actual cumulative dose received and actual duration of exposure.
Up to approximately 24 months
Incidence and severity of Adverse Events (AEs) and Serious Adverse Events (SAEs)
Time Frame: Up to approximately 24 months

Number of participants with AEs and SAEs, including changes in laboratory values, vital signs and echocardiograms (ECGs) qualifying and reported as AEs.
Up to approximately 24 months
Incidence of Dose Limiting Toxicities (DLTs)
Time Frame: 21 days

Number of participants with DLTs. A DLT is defined as an adverse event or abnormal laboratory value of Common Terminology Criteria for Adverse Events (CTCAE) grade 3 or higher, unless clearly and incontrovertibly assessed as due to underlying disease, disease progression, or intercurrent illness, that occurs within the first 21 days of treatment with TRB191. Other clinically significant toxicities may be considered DLTs, even if not CTCAE grade 3 or higher.
21 days
Frequency of dose interruptions and reductions
Time Frame: Up to approximately 24 months

Number of participants with dose adjustments (interruptions and reductions as a measure of tolerability.
Up to approximately 24 months

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
Maximum serum concentration (Cmax) of TRB191
Time Frame: From pre-dose up to 120 or 240 hours post-dose

Pharmacokinetic (PK) parameters based on serum concentrations of TRB191. Cmax will be determined using non-compartmental method(s).
From pre-dose up to 120 or 240 hours post-dose
Time to reach maximum serum concentration (Tmax) of TRB191
Time Frame: From pre-dose up to 120 or 240 hours post-dose

PK parameters based on serum concentrations of TRB191. Tmax will be determined using non-compartmental method(s).
From pre-dose up to 120 or 240 hours post-dose
Arean under the serum concentration-time curve (AUC) of TRB191
Time Frame: From pre-dose up to 120 or 240 hours post-dose

PK parameters based on serum concentrations of TRB191. AUC will be determined using non-compartmental method(s).
From pre-dose up to 120 or 240 hours post-dose
Number of participants with anti-drug antibodies (ADA)
Time Frame: From baseline (pre-dose) up to approximately 24 months

Number of participants with anti-TRB191 antibodies during treatment.
From baseline (pre-dose) up to approximately 24 months
Overall Response Rate (ORR) per RECIST v1.1
Time Frame: Up to approximately 24 months

ORR is defined as the proportion of patients with a best overall response (BOR) of Complete response (CR) or Partial response (PR) as per local review and according to Response Evaluation Criteria In Solid Tumors version 1.1 (RECIST v1.1).
Up to approximately 24 months
Disease Control Rate (DCR) per RECIST v1.1
Time Frame: Up to approximately 24 months

DCR is defined as the proportion of patients with a BOR of CR, PR, or stable disease as per local review and according to RECIST v1.1.
Up to approximately 24 months
Duration of Response (DOR) per RECIST v1.1
Time Frame: Up to approximately 24 months

DOR is the time between the first documented response (CR or PR) and the date of progression as per local review and according to RECIST v 1.1, or death due to any cause.
Up to approximately 24 months
Progression-Free Survival (PFS) per RECIST v1.1
Time Frame: Up to approximately 24 months

PFS is defined as the time from the date of start of treatment to the date of the first documented progression as per local review and according to RECIST v1.1 or death due to any cause.
Up to approximately 24 months

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
Novartis Pharmaceuticals

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Estimated)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
November 17, 2026

Primary Completion (Estimated)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
July 30, 2030

Study Completion (Estimated)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
July 30, 2030

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
October 26, 2026

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
October 26, 2026

First Posted (Actual)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
November 2, 2026

Study Record Updates

Last Update Posted (Actual)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
November 13, 2026

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
November 12, 2026

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
November 1, 2026

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • CTRB191A12101
  • 2026-526463-37 (Registry Identifier: EU CTIS)

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

IPD Plan Description

Novartis is committed to sharing with qualified external researchers, access to patient-level data and supporting clinical documents from eligible studies. These requests are reviewed and approved by an independent review panel on the basis of scientific merit. All data provided is anonymized to respect the privacy of patients who have participated in the trial in line with applicable laws and regulations. This trial data availability is according to the criteria and process described on https://www.clinicalstudydatarequest.com/.

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

Yes

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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