An Early Phase Trial of RPTR-1-201 in Advanced Solid Tumors (RaPTR-101)

February 12, 2026 updated by: Repertoire Immune Medicines

A Phase 1/2 Trial of RPTR-1-201, a T Cell Receptor Bispecific Therapy, in Advanced Solid Tumors

This is an early phase trial designed to evaluate the safety, tolerability, and preliminary antitumor activity of RPTR-1-201 in adults with advanced solid tumors. The trial includes dose escalation and dose expansion parts and will evaluate RPTR-1-201 as monotherapy and in combination with an anti-PD-1 monoclonal antibody.

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.

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.
150

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 2
  • 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 Locations

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

  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Description

Inclusion Criteria

  • Histologically or cytologically confirmed locally advanced or metastatic solid tumors that is not amenable to curative treatment.
  • At least one measurable lesion per RECIST v1.1 as assessed by the investigator.
  • Eastern Cooperative Oncology Group (ECOG) performance status of 0 or 1.
  • Adequate organ function as defined in the trial protocol.
  • Ability to provide written informed consent and comply with trial procedures.

Exclusion Criteria:

  • History of another malignancy within 3 years before the first dose of trial intervention, with the exception of malignancies considered cured and not expected to require active therapy (for example, certain skin cancers or in situ malignancies) per protocol.
  • Known active leptomeningeal disease or uncontrolled central nervous system metastases.
  • Active, clinically significant, autoimmune diseases requiring systemic immunosuppressive therapy.
  • Prior allogenic organ transplantation
  • Clinically significant uncontrolled medical or psychiatric condition, that in the opinion of the investigator, would increase risk or interfere with trial participation.
  • Other protocol-defined inclusion and exclusion criteria 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: Non-Randomized
  • Interventional Model: Sequential Assignment
  • Masking: Single

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: Monotherapy
Participants receive RPTR-1-201 at doses and schedules defined by the trial protocol.
Drug: RPTR-1-201
RPTR-1-201
Experimental: Combination
Participants receive RPTR-1-201 in combination with an approved or investigational PD-1 monoclonal antibody at doses and schedules defined by the trial protocol.
Drug: PD-1 / PD-L1 monoclonal antibody
PD-1/PD-L1 monoclonal antibody
Drug: RPTR-1-201
RPTR-1-201

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
Number of participants with dose-limiting toxicities and treatment-emergent adverse events.
Time Frame: From first dose through 30 days after last dose of trial treatment.
Number of participants experiencing dose-limiting toxicities and treatment-emergent adverse events, including events considered related to RPTR-1-201, graded according to CTCAE v5.0.
From first dose through 30 days after last dose of trial treatment.
Objective Response Rate (ORR) per RECIST v1.1
Time Frame: From first dose until end of treatment or documented disease progression, whichever occurs first (assessed up to 24 months).
Proportion of participants with a best overall response of complete response or partial response per RECIST v1.1, as assessed by the investigator.
From first dose until end of treatment or documented disease progression, whichever occurs first (assessed up to 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
Incidence and severity of adverse events and abnormal safety assessments.
Time Frame: From first dose through 30 days after last dose of trial treatment
Incidence and severity of adverse events, including immune-related adverse events, and abnormal safety assessments (clinical laboratory tests, ECGs, vital signs).
From first dose through 30 days after last dose of trial treatment
Pharmacokinetics of RPTR-1-201
Time Frame: First dose until end of treatment (assessed up to 24 months).
Characterization of the pharmacokinetic maximum observed concentration of RPTR-1-201.
First dose until end of treatment (assessed up to 24 months).
Progression Free Survival (PFS)
Time Frame: From first dose until disease progression, death, or end of trial follow-up, whichever occurs first (assessed up to 24 months).
Time from first dose of RPTR-1-201 to the earliest date of documented disease progression per RECIST v1.1 or death from any cause, whichever occurs first.
From first dose until disease progression, death, or end of trial follow-up, whichever occurs first (assessed up to 24 months).
Overall survival (OS)
Time Frame: From first dose until death from any cause or end of trial follow-up, whichever occurs first (assessed up to 36 months).
Time from first dose of RPTR-1-201 to death from any cause.
From first dose until death from any cause or end of trial follow-up, whichever occurs first (assessed up to 36 months).
Time to Response
Time Frame: From first dose until first documented response, disease progression, or end of trial follow-up, whichever occurs first (assessed up to 24 months).
Time from first dose of RPTR-1-201 to the first documented complete response or partial response per RECIST v1.1.
From first dose until first documented response, disease progression, or end of trial follow-up, whichever occurs first (assessed up to 24 months).
Pharmacokinetics of RPTR-1-201 (AUC)
Time Frame: First dose until end of treatment (assessed up to 24 months)
Characterization of the pharmacokinetic area under the curve of RPTR-1-201
First dose until end of treatment (assessed up to 24 months)
Immunogenicity of RPTR-1-201
Time Frame: First dose until end of treatment (assessed up to 24 months)
Characterization of the incidence of anti-drug antibodies of RPTR-1-201.
First dose until end of treatment (assessed up to 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.
Repertoire Immune Medicines

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 (Actual)

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.
December 12, 2025

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.
December 15, 2028

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.
April 15, 2029

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).
December 3, 2025

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.
December 17, 2025

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.
December 19, 2025

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.
February 17, 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.
February 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.
February 1, 2026

More Information

Terms related to this study

Keywords

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.
  • RPTR-1-201-101
  • 2025-524010-28-00 (Ctis)

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

IPD Plan Description

Individual participant data will not be shared for this trial.

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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