Sacituzumab Tirumotecan in Participants With Locally Advanced or Metastatic Thymic Carcinoma

August 10, 2026 updated by: Sichuan Kelun-Biotech Biopharmaceutical Co., Ltd.

A Phase II Clinical Study of Sacituzumab Tirumotecan in Participants With Locally Advanced or Metastatic Thymic Carcinoma With Treatment Failure After Platinum-Based Therapy

The goal of this clinical trial is to learn if drug Sac-TMT works to treat Thymic Carcinoma. It will also learn about the safety of Sac-TMT. The main questions it aims to answer are:

  • How effective is drug Sac-TMT in treating Thymic Carcinoma?
  • What adverse events (AEs) do participants have when taking drug Sac-TMT?

Participants will:

  • Progress after at least one platinum-based chemotherapy treatment.
  • Take drug Sac-TMT every 2 weeks.
  • Take tumor response assessments every 6 weeks.

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.
30

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

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 Locations

  • China
      • Shanghai, China
        • Recruiting
        • Shanghai Chest Hospital
        • Contact:

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:

  • Males or females aged ≥ 18 to ≤ 75 years at the time of signing the Informed Consent Form;
  • Participants with histologically or cytologically confirmed thymic carcinoma, and locally advanced or metastatic thymic carcinoma who are not suitable for curative intent therapy;
  • Participants with advanced thymic carcinoma who have progressed after at least one prior platinum-based chemotherapy;
  • Able to provide a tumor tissue sample at the time of or after the diagnosis of locally advanced or metastatic tumor;
  • At least one measurable target lesion that has not received radiotherapy according to RECIST v1.1;
  • ECOG performance status score of 0 or 1;
  • Expected survival ≥ 12 weeks;
  • Adequate organ and bone marrow function.

Exclusion Criteria:

  • Participants with histologically or cytologically confirmed thymoma or thymic neuroendocrine tumor;
  • Participants with known metastases to meninges, brainstem metastases, spinal cord metastases and/or compression, active or untreated brain metastases;
  • Participants with other malignant tumors within 3 years prior to the first dose;
  • Presence of any of conditions or risk factors related to cardiovascular and cerebrovascular diseases;
  • Uncontrolled systemic disease as judged by the investigator;
  • History of interstitial lung disease/noninfectious pneumonitis requiring steroid therapy;
  • Clinically severe pulmonary impairment due to lung disorder;
  • Presence of active hepatitis B or hepatitis C;
  • Known active tuberculosis;
  • Known hypersensitivity to the study drug or any of its components.

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: Sac-TMT 5mg/kg Q2W
Drug: Sacituzumab tirumotecan
Sacituzumab tirumotecan (Sac-TMT; also known as SKB264) for injection.

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
ORR
Time Frame: From enrollment to the end of treatment at 24 months
To evaluate the objective response rate (ORR) of sac-TMT as assessed by the investigator based on RECIST v1.1.
From enrollment to the end of treatment at 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
PFS
Time Frame: From enrollment to the end of treatment at 24 months
To evaluate the progression-free survival (PFS) as assessed by the investigator based on RECIST v1.1.
From enrollment to the end of treatment at 24 months
OS
Time Frame: From enrollment to the end of treatment at 24 months
To evaluate the overall survival (OS) of sac-TMT in participants with locally advanced or metastatic thymic carcinoma with treatment failure after platinum-based therapy.
From enrollment to the end of treatment at 24 months
Incidence and severity of AEs and SAEs, and abnormal laboratory values.
Time Frame: From enrollment to the end of treatment at 24 months
To evaluate the safety of sac-TMT in participants with locally advanced or metastatic thymic carcinoma.
From enrollment to the end of treatment at 24 months
DCR
Time Frame: From enrollment to the end of treatment at 24months
Duration of response (DOR) as assessed by the investigator based on RECIST v1.1.
From enrollment to the end of treatment at 24months

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.
Sichuan Kelun-Biotech Biopharmaceutical Co., Ltd.

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.
March 13, 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.
April 1, 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.
October 1, 2028

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 11, 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 24, 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.
January 7, 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.
August 12, 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.
August 10, 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.
May 1, 2026

More Information

Terms related to this study

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.
  • SKB264-II-17

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

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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