CD19/BAFF-R in Vivo CAR-T Cell Therapy Targeting Relapsed/Refractory B Cell Acute Leukemia/Malignant Lymphoma

January 28, 2026 updated by: Qi deng

Clinical Study on the Efficacy and Safety of CD19/BAFF-R in Vivo CAR-T Cell Therapy Targeting Relapsed/Refractory B Cell Acute Leukemia/Malignant Lymphoma

The currently CAR-T cell therapy in clinical practice largely depends on the expansion of CAR-T cells in vivo. However, the in vitro preparation process of CAR-T cells is complex and costly. In vivo CAR-T cell therapy eliminates the need for ex vivo preparation, significantly reducing treatment costs and procedural complexity. It enables immediate use, thereby improving patient accessibility. CD19 is stably overexpressed in more than 90% of B-cell malignancies. BAFF plays a core regulatory role in the survival, maturation, and homeostasis maintenance of B cells. BAFF-R is selectively expressed on the surface of mature B cell subsets and most B-cell malignancies. Currently, BAFF-R-based CAR-T therapy is in preclinical and early clinical research stages, demonstrating promising therapeutic potential, particularly offering a novel treatment option for patients with CD19-negative or drug-resistant B-cell tumors. The use of CD19/BAFF-R in vivo CAR-T cells as a new anti-tumor therapy may provide a new research direction for the treatment of relapsed/refractory B-cell acute leukemia/malignant lymphoma.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Not yet 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.
18

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

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

  • Child
  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

Subjects must meet all of the following criteria：

  • The diagnosis was confirmed as B-cell acute leukemia/malignant lymphoma. Requirements for prior treatment: Patients with B-cell acute leukemia/malignant lymphoma who failed to achieve PR after first-line therapy or experienced relapse within 12 months after first-line therapy; or those with relapsed/refractory disease after second-line therapy (a standardized chemotherapy regimen plus salvage chemotherapy). During screening, the patient was in a state of disease recurrence or refractory condition: Acute B-cell leukemia: a) Relapse definition: The presence of blast cells (proportion>5%) in peripheral blood or bone marrow after achieving complete remission with a standardized treatment regimen (including hematopoietic stem cell transplantation), or the development of extramedullary disease; b) Refractory definition: Failure to achieve complete remission after at least two courses of standardized induction therapy. B-cell lymphoma: a) Definition of relapse: PD after achieving remission (including partial response (PR) or complete response (CR)) following adequate treatment; b) Definition of refractory: i. No response to the last treatment: PD during/after the last treatment or SD with a duration of less than 6 months; ii. Relapse or progression after ASCT, including: relapse or PD within 12 months after ASCT, and no response to the last treatment (SD or PD) if salvage therapy is administered.
  • The subject's predicted survival time is not less than three months.
  • Tumor cells confirmed to be CD19/BAFFR positive by Flow Cytometry (FCM) or Immunohistochemistry.
  • Patients with relapsed/refractory B-cell acute lymphoblastic leukemia (B-ALL) and relapsed/refractory B-cell lymphoma (B-LY) who have at least one evaluable lesion.
  • Age 14-75 years (inclusive), both genders eligible.
  • ECOG performance status ≤ 3.
  • HGB≥70g/L(transfusion permitted).
  • The functions of vital organs need to meet the following conditions: ①Creatinine ≤ 2.5 × ULN or Cockcroft-Gault creatinine clearance > 50 ml/min (excluding decreased serum creatinine clearance due to lymphoma mass compression), Combination with hemodialysis treatment is permitted. ②LVEF≥50%,② Oxygen saturation ≥90%,③ SCr≤2.5ULN,④ALT and AST≤3ULN,TBil≤2ULN. In the investigator's judgment, if organ dysfunction is associated with the current disease, the enrollment decision will be made by the investigator.
  • Subjects intending to conceive must agree to use contraception prior to study enrollment and for six months post-study. In the event of pregnancy or suspected pregnancy, they should promptly notify the investigator.
  • The subject or guardian understands and signs the Informed Consent Form (ICF).

Exclusion Criteria:

Any of the following conditions will not be eligible for enrolment:

  • Severe heart failure with left ventricular ejection fraction (LVEF) < 50%.
  • History of severe pulmonary function impairment.
  • Concurrent other progressive malignant tumors.
  • Concurrent severe infection that cannot be effectively controlled.
  • Concurrent severe autoimmune disease or congenital immunodeficiency.
  • Active hepatitis (hepatitis B surface antigen (HBsAg) and/or hepatitis B core antibody (HBcAb) positive with HBV DNA copy number greater than the upper limit of normal at the study center; Anti-HCV positive with HCV-RNA copy number greater than the upper limit of normal at the study center).
  • Human immunodeficiency virus (HIV) infection or known acquired immunodeficiency syndrome (AIDS), or syphilis infection.
  • History of severe allergy to biological products (including antibiotics).
  • Received inactivated vaccines such as influenza vaccine, COVID-19 vaccine within 4 weeks prior to screening, or received live attenuated vaccines (such as measles, varicella vaccines) within 8 weeks.
  • Patients with other severe physical or mental illnesses or laboratory abnormalities that may increase the risk of study participation or interfere with study results, and patients considered unsuitable for this study by the investigator.

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: CD19/BAFF-R in vivo CAR-T cell therapy
Biological: CD19/BAFF-R in vivo CAR-T cell intravenous infusion
CD19/BAFF-R in vivo CAR-T cell intravenous infusion

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
Evaluate the safety of CD19/BAFF-R in vivo CAR-T cell therapy in relapsed/refractory B Cell Acute Leukemia/Malignant Lymphoma
Time Frame: up to one month after the CAR-T infusion
the incidence and severity of immune therapy related toxic reactions (irAEs)
up to one month after the CAR-T infusion
Evaluate the effcacy of CD19/BAFF-R in vivo CAR-T cell therapy in relapsed/refractory B Cell Acute Leukemia/Malignant Lymphoma
Time Frame: one month and three month after the CAR-T infusion
CR rate on M1 and M3
one month and three month after the CAR-T infusion

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
long-term efficacy
Time Frame: up to one year after the CAR-T infusion
OS
up to one year after the CAR-T infusion
Cell pharmacokinetics Dynamic indicators
Time Frame: Day7, Day10, Day14, Day28 after the CAR-T infusion
CAR-T/T% by flow cytometry
Day7, Day10, Day14, Day28 after the CAR-T infusion

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.
Qi deng

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.
June 1, 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.
May 31, 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.
May 31, 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).
January 18, 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.
January 28, 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.
February 3, 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.
February 3, 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.
January 28, 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.
January 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.
  • XBAP2025-10

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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