Target-Selected CAR-NK Cells (CD30, CD5, or Mesothelin) for Relapsed/Refractory B2 Thymoma or Thymic Carcinoma (SELECT-NK-THYM)

May 14, 2026 updated by: Beijing Biotech

A Phase 1/2, Open-Label, Target-Selected Study of Allogeneic CAR-NK Cells Directed to CD30, CD5, or Mesothelin in Patients With Relapsed/Refractory B2 Thymoma or Thymic Carcinoma

This Phase 1/2 study evaluates the safety, tolerability, and preliminary efficacy of target-selected CAR-natural killer (CAR-NK) cells in adults with relapsed or refractory B2 thymoma or thymic carcinoma. Participants undergo centralized tumor antigen assessment (CD30, CD5, and mesothelin). Based on the dominant and clinically actionable antigen expression profile, each participant is assigned to one of three parallel cohorts (CD30-CAR-NK, CD5-CAR-NK, or mesothelin-CAR-NK). All cohorts use the same lymphodepleting conditioning regimen followed by CAR-NK infusion(s).

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 first-in-indication, open-label, non-randomized, multi-center Phase 1/2 study with biomarker-driven cohort assignment. Phase 1 (dose escalation): Within each target cohort, a standard 3+3 dose-escalation design evaluates up to three dose levels of the assigned CAR-NK product to determine the maximum tolerated dose (MTD) and/or recommended Phase 2 dose (RP2D). Dose-limiting toxicities (DLTs) are assessed from Day 0 through Day 28 after the first CAR-NK infusion. Phase 2 (dose expansion): After an RP2D is identified in a cohort, an expansion stage enrolls additional participants in that cohort to further characterize safety and estimate preliminary antitumor activity. CAR-NK product: Off-the-shelf, allogeneic cord blood-derived NK cells are genetically modified to express a single-target CAR (anti-CD30, anti-CD5, or anti-mesothelin). The construct includes an IL-15 support element to enhance persistence and an inducible caspase-9 (iCasp9) safety switch for rapid elimination of CAR-NK cells if clinically indicated. Correlative studies: Serial blood and (when feasible) tumor sampling will evaluate CAR-NK persistence, immune activation markers, cytokines, tumor antigen modulation, and exploratory biomarkers of response and resistance. Long-term follow-up: Participants will be followed for delayed adverse events and survival; participants receiving gene-modified cells will also be invited to long-term follow-up consistent with applicable gene therapy guidance.

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.
36

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 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
    • Guangdong
      • Shenzhen, Guangdong, China, 518036

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:

  • Age 18 to 75 years at the time of consent.
  • Histologically confirmed B2 thymoma or thymic carcinoma that is unresectable, metastatic, or recurrent.
  • Relapsed or refractory after at least 1 prior systemic therapy (including a platinum-based regimen for thymic carcinoma when appropriate) or no standard curative option available.
  • Tumor antigen positivity for at least one of the following by central laboratory assessment: CD30, CD5, or mesothelin. Cohort assignment is based on the dominant target (pre-specified algorithm) and feasibility of manufacturing/availability.
  • Measurable disease per RECIST v1.1 (or evaluable disease if measurable disease is not feasible; to be specified).
  • ECOG performance status 0-1 (0-2 may be permitted in expansion at investigator discretion).
  • Adequate organ function: ANC ≥ 1.0 x 10^9/L, platelets ≥ 75 x 10^9/L, hemoglobin ≥ 8 g/dL (transfusions allowed), AST/ALT ≤ 3 x ULN (≤ 5 x ULN with liver involvement), total bilirubin ≤ 1.5 x ULN (except Gilbert's), creatinine clearance ≥ 50 mL/min.
  • Negative pregnancy test for participants of childbearing potential; agreement to use effective contraception.
  • Ability to understand and sign informed consent.

Exclusion Criteria:

  • Active central nervous system involvement by malignancy requiring immediate therapy.
  • Prior gene-modified cellular therapy (e.g., CAR-T, CAR-NK) within 90 days or unresolved ≥Grade 2 toxicity from prior cellular therapy.
  • Uncontrolled infection, including active tuberculosis, or uncontrolled hepatitis B or C infection; known uncontrolled HIV infection.
  • Clinically significant autoimmune disease requiring systemic immunosuppression (e.g., >10 mg/day prednisone equivalent) within 14 days of conditioning, except for stable endocrine replacement.
  • Prior allogeneic hematopoietic stem cell transplant with active graft-versus-host disease or ongoing immunosuppression.
  • Significant cardiovascular disease (e.g., NYHA class III/IV heart failure, recent myocardial infarction), uncontrolled arrhythmia, or QTc prolongation felt to increase risk.
  • Pregnancy or breastfeeding.
  • Concurrent participation in another interventional trial with an investigational anticancer agent within 21 days (washout required).
  • Any condition that, in the investigator's judgment, would interfere with safe participation or interpretation of results.

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: Parallel 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: Cohort A: CD30-CAR-NK

Lymphodepleting chemotherapy: cyclophosphamide + fludarabine (Days -5 to

-3), followed by CAR-NK infusion on Day 0. A second infusion on Day 7 may be permitted at investigator discretion in Phase 2 if no ≥Grade 3 treatment-related toxicity is observed and product is available.
Drug: Cyclophosphamide
lymphodepletion
Drug: Fludarabine
lymphodepletion
Biological: EB-CAR30-NK
CD30-targeted allogeneic CAR-NK cells
Biological: EB-CAR5-NK
CD5-targeted allogeneic CAR-NK cells
Biological: EB-CARMSLN-NK
Mesothelin-targeted allogeneic CAR-NK cells
Drug: Rimiducid (AP1903)
ctivate the iCasp9 safety switch if clinically indicated
Experimental: Cohort B: CD5-CAR-NK

Lymphodepleting chemotherapy: cyclophosphamide + fludarabine (Days -5 to

-3), followed by CAR-NK infusion on Day 0. A second infusion on Day 7 may be permitted at investigator discretion in Phase 2 if no ≥Grade 3 treatment-related toxicity is observed and product is available.
Drug: Cyclophosphamide
lymphodepletion
Drug: Fludarabine
lymphodepletion
Biological: EB-CAR30-NK
CD30-targeted allogeneic CAR-NK cells
Biological: EB-CAR5-NK
CD5-targeted allogeneic CAR-NK cells
Biological: EB-CARMSLN-NK
Mesothelin-targeted allogeneic CAR-NK cells
Drug: Rimiducid (AP1903)
ctivate the iCasp9 safety switch if clinically indicated
Experimental: Cohort C: Mesothelin-CAR-NK

Lymphodepleting chemotherapy: cyclophosphamide + fludarabine (Days -5 to

-3), followed by CAR-NK infusion on Day 0. A second infusion on Day 7 may be permitted at investigator discretion in Phase 2 if no ≥Grade 3 treatment-related toxicity is observed and product is available.
Drug: Cyclophosphamide
lymphodepletion
Drug: Fludarabine
lymphodepletion
Biological: EB-CAR30-NK
CD30-targeted allogeneic CAR-NK cells
Biological: EB-CAR5-NK
CD5-targeted allogeneic CAR-NK cells
Biological: EB-CARMSLN-NK
Mesothelin-targeted allogeneic CAR-NK cells
Drug: Rimiducid (AP1903)
ctivate the iCasp9 safety switch if clinically indicated

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
Incidence of Dose-Limiting Toxicities (DLTs)
Time Frame: 28 Days
DLTs as defined in protocol, assessed during the DLT window after the first CAR-NK infusion. Includes severe infusion-related toxicity, Grade >=3 organ toxicity attributable to CAR-NK cells, severe CRS or neurotoxicity, and treatment-related death.
28 Days
Recommended Phase 2 Dose
Time Frame: 28 Days
Determined separately for each cohort based on DLTs, overall safety, and pharmacodynamic data
28 Days

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
Objective Response Rate
Time Frame: 12 months
Proportion of participants with complete response (CR) or partial response (PR) per RECIST v1.1 (or modified criteria appropriate for thymic tumors) in each cohort.
12 months
Disease Control Rate
Time Frame: 12 months
Proportion of participants with CR, PR, or stable disease
12 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.
Beijing Biotech

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 2, 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.
June 14, 2027

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 17, 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).
May 14, 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.
May 14, 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.
May 20, 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.
May 20, 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.
May 14, 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

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.
  • EB-CARNK-THYM-009

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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