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Acute Lymphoblastic Leukemia, Adult B-CellPhase 1/2NCT03984968

CD19 CAR-T Consolidation Therapy for Acute Lymphoblastic Leukemia

A Phase 1/2 study testing ssCART-19 cells combined with CD19+ feeding T cells (FTCs) infusion in people with Acute Lymphoblastic Leukemia, Adult B-Cell, run by The First Affiliated Hospital of Soochow University at 1 site in China.

Active, not recruiting

Under way, not looking for participants. Everyone needed has enrolled. The study is still running.

Official record
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Trial summary

This is a single-arm, open-label, single-center, phase I/II study to determine the safety and efficacy of CD19 CAR-T(ssCART-19) combined with autologous T cells engineered to express CD19, namely CD19+ feeding T cells (FTCs), as consolidation therapy in patients diagnosed with de novo Philadelphia chromosome-positive… Read more about this study

Who is it for?
Ages 15 to 65 years
What is being tested?
ssCART-19 cells combined with CD19+ feeding T cells (FTCs) infusion
Type of treatment
Injection or infusion
Could I receive a placebo?
No, everyone receives an active treatment
How many people
40 participants
Where
1 siteChina
Study dates
10 Jul 2017to 20 Jul 2040
Phase
Phase 1/2
Are there results?
Not yet: the study is under way

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 15 to 65 years
  • All sexes
  • No healthy volunteers
  • Child, Adult, Older adult

Who may be able to join

  • 15-65 years of age at the time of signing informed consent
  • Diagnosed as de novo Philadelphia chromosome-positive CD19+ B-ALL
  • Karnofsky performance status ≥ 60 or Eastern Cooperative Oncology Group (ECOG) performance status ≤ 2
  • Unable to find a suitable donor or for other reasons to undergo allogeneic hematopoietic stem cell transplantation during the study
  • Ability and willingness to adhere to the study visit schedule and all protocol requirements
  • Voluntarily sign informed consent forms

Who cannot join

  • Unable to tolerate any kind of TKIs (including the first- and second-generation tyrosine kinase inhibitors) for a long period.
  • Subjects who have positive mutation(s) of the ABL kinase domain and require the third-generation tyrosine kinase inhibitors for long-term therapies.
  • Inadequate hepatic function defined by aspartate aminotransferase (AST) and/or alanine aminotransferase (ALT) > 3 × upper limit of normal (ULN) and direct bilirubin > 1.5 × ULN
  • Inadequate renal function defined by serum creatinine > 1.6 mg/dL
  • International ratio (INR) or partial thromboplastin time (PTT) > 1.5 x ULN
  • Left ventricular ejection fraction < 50%
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  • Ongoing treatment with chronic immunosuppressants
  • Significant comorbid conditions or diseases which, in the judgment of the investigator, would place the subject at undue risk or interfere with the study; examples include, but are not limited to, cirrhotic liver disease, sepsis, recent significant traumatic injury, and other conditions
  • Known human immunodeficiency virus (HIV) positivity
  • Subjects with a history of stroke, unstable angina, myocardial infarction, or ventricular arrhythmia requiring medication or mechanical control
  • Subjects with second malignancies in addition to ALL
  • Pregnant or lactating women, or subjects refusing to take effective contraception measures
  • Other contraindications that are considered inappropriate to participate in this trial

Trial locations and contacts

1 site in 1 country.

China1 site
  • The First Affliated Hospital of Soochow University

    Suzhou, Jiangsu, 215006

Other trials in China

About this study

Official title: Evaluation of the Safety and Efficacy of CD19 CAR-T Combined With Autologous T Cells Engineered to Express CD19 (CD19+ Feeding T Cells, FTCs) for Consolidation Treatment for Acute Lymphoblastic Leukemia

This is a single-arm, open-label, single-center, phase I/II study to determine the safety and efficacy of CD19 CAR-T(ssCART-19) combined with autologous T cells engineered to express CD19, namely CD19+ feeding T cells (FTCs), as consolidation therapy in patients diagnosed with de novo Philadelphia chromosome-positive CD19+ B-ALL.

The study will contain the following sequential phases: screening, lymphocyte apheresis, induction, and consolidation chemotherapies combined with tyrosine kinase inhibitors. Once in complete response, patients will receive two to four cycles of ssCART-19s, namely one cycle of ssCART-19 infusion (CAR-T1) followed by one to three cycles of ssCART-19 and CD19+ FTC infusion (CAR-T2-4). The role of CD19+ FTCs is to mimic leukemia cells. Therefore, they are expected to stimulate in vivo expansion and persistence of ssCART-19.

Read more

Considering the limited number of lymphocytes obtained by a single apheresis from patients and cost-efficacy, in addition to safety, we will explore the range of biologically active doses of FTCs in a phase I study. Based on preclinical data, FTCs' stimulation of ssCART-19 at a ratio of 1:1 could achieve the best activation response, so a 5×10^6/kg dosage of FTCs was set as the initial dosage in the study, and lower doses were also evaluated. In phase I, FTCs will be administered at the dose of 5×10^6/kg, 3.25×10^6/kg, or 2×10^6/kg two hours after ssCART-19 infusion on day 1 and once again administered at the same dose on day 8. After ssCART-19 and FTCs infusion, adverse events (AEs) as the primary endpoints will be recorded for 6 months; efficacy as the secondary endpoint will be assessed by detecting molecular response for 6 months, PFS, and OS for 2 years.

In phase II, we will expand the study at optimal biological doses of FTCs and further evaluate the efficacy and safety of the innovative combination therapy of ssCART-19 and FTCs. The primary endpoint was the complete molecular response (CMR). The secondary endpoints were RFS, OS, and adverse events (AEs) of the patients.

Being tested
ssCART-19 cells combined with CD19+ feeding T cells (FTCs) infusion
Keywords
feeding T cell, CD19 CAR-T therapy
Medical subject headings
Precursor Cell Lymphoblastic Leukemia-Lymphoma

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • ssCART-19 cells combined with CD19+ feeding T cells (FTCs) infusionBiological

    Phase 1: Optimal biological doses of feeding T cells (FTCs) identification. ssCART-19 cells combined with CD19+ FTCs were administered to Philadelphia chromosome-positive B-ALL patients with remission. ssCART-19 was infused at the dose of 5×10^6/kg on days 1 to 3 of the first cycle and on day 1 of the second to fourth cycle. CD19+ FTCs (5×10^6 cells/kg) were infused two hours after the infusion of ssCART-19 cells on day 1 and at the same dose alone on day 8 of the second to fourth cycle. Five patients were enrolled in this arm, and all the patients received four cycles of ssCART-19 consolidation.

  • ssCART-19 cells combined with CD19+ feeding T cells (FTCs) infusionBiological

    Phase 1: Optimal biological doses of feeding T cells (FTCs) identification. ssCART-19 cells combined with CD19+ FTCs were administered to Philadelphia chromosome-positive B-ALL patients with remission. ssCART-19 was infused at the dose of 5×10^6/kg on days 1 to 3 of the first cycle and on day 1 of the second to fourth cycle. CD19+ FTCs (3.25×10^6 cells/kg) were infused two hours after the infusion of ssCART-19 cells on day 1 and at the same dose alone on day 8 of the second to fourth cycle. Four patients were enrolled in this arm, and all the patients received four cycles of ssCART-19 consolidation.

  • ssCART-19 cells combined with CD19+ feeding T cells (FTCs) infusionBiological

    Phase 1: Optimal biological doses of feeding T cells (FTCs) identification. ssCART-19 cells combined with CD19+ FTCs were administered to Philadelphia chromosome-positive B-ALL patients with remission. ssCART-19 was infused at the dose of 5×10^6/kg on days 1 to 3 of the first cycle and on day 1 of the second to fourth cycle. CD19+ FTCs (2×10^6 cells/kg) were infused two hours after the infusion of ssCART-19 cells on day 1 and at the same dose alone on day 8 of the second to fourth cycle. Four patients were enrolled in this arm, and all the patients received four cycles of ssCART-19 consolidation.

  • ssCART-19 cells combined with CD19+ feeding T cells (FTCs) infusionBiological

    Phase 2: Expansion Study. ssCART-19 cells combined with FTCs at the optimal biological dosage determined in the Phase 1 study were given to expanded Philadelphia chromosome-positive B-ALL patients with remission. The 5×10^6 cells/kg of CD19+ FTCs was the optimal biological dose determined in phase I. Therefore, CD19+ FTCs at 5×10^6 cells/kg were infused two hours after the infusion of ssCART-19 cells on day 1 and at the same dose alone on day 8 of the second to fourth cycle, while ssCART-19 was infused at the dose of 5×10^6/kg on days 1 to 3 of the first cycle and on day 1 of the second to fourth cycle. The Bayesian optimal design was applied to perform the futility assessment at the specified interim analyses. Thirty-eight evaluable subjects were recruited, and all the patients received at least two cycles of ssCART-19 consolidation.

Study groups in NCT03984968
Study groupRoleWhat they receive
FTCs: High dose (Phase 1)ExperimentalNot described
Receives: Biological: ssCART-19 cells combined with CD19+ feeding T cells (FTCs) infusion
FTCs: Medium dose (Phase 1)ExperimentalNot described
Receives: Biological: ssCART-19 cells combined with CD19+ feeding T cells (FTCs) infusion
FTCs: Low dose (Phase 1)ExperimentalNot described
Receives: Biological: ssCART-19 cells combined with CD19+ feeding T cells (FTCs) infusion
FTCs: High dose (Phase 2)ExperimentalNot described
Receives: Biological: ssCART-19 cells combined with CD19+ feeding T cells (FTCs) infusion

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Phase 1 Incidence of adverse events (AEs) and abnormal laboratory test results

    AEs will be assessed according to the Common Terminology Criteria for Adverse Events 5.0 (CTCAE5.0).

    Measured: 6 months after ssCART-19 consolidation termination (CAR-T4; each cycle is 3 months)

  2. Phase 2 Molecular response after CD19 CAR-T consolidation therapy combined with CD19+ feeding T cells

    Complete molecular response (CMR) was defined as the absence of a detectable BCR-ABL1 transcript with a sensitivity of 0.01%.

    Measured: 3 months after each cycle of ssCART-19 consolidation termination (each cycle is 3 months)

Secondary outcomes (7)
  1. Phase 1 Molecular response after CD19 CAR-T consolidation therapy combined with CD19+ feeding T cells.

    Complete molecular response (CMR) was defined as the absence of a detectable BCR-ABL1 transcript with a sensitivity of 0.01%.

    Measured: 3 months after each cycle of ssCART-19 consolidation termination (each cycle is 3 months)

  2. Phase 1 The range of biologically active doses and optimal biological doses of CD19+ feeding T cells.

    The range of biologically active doses and optimal biological doses of CD19+ feeding T cells will be determined.

    Measured: 6 months after ssCART-19 consolidation termination (CAR-T4; each cycle is 3 months)

  3. Phase 1 Overall survial (OS)

    It is measured from the date of entry into this trial to the date of death from any cause; patients not known to have died at last follow-up are censored on the date they were last known to be alive.

    Measured: 2 years

  4. Phase 1 Relapse free survival(RFS)

    It is measured from the date of achievement of a remission until the date of relapse from CR, or CRi, or death from any cause; patients not known to have any of these events are censored on the date they were last examined.

    Measured: 2 years

  5. Phase 2 Incidence of adverse events (AEs) and abnormal laboratory test results

    AEs will be assessed according to the Common Terminology Criteria for Adverse Events 5.0 (CTCAE5.0).

    Measured: 6 months after ssCART-19 consolidation termination (the specific date depending how many cycles the participants received; each cycle is 3 months)

  6. Phase 2 Overall survial (OS)

    It is measured from the date of entry into this trial to the date of death from any cause; patients not known to have died at last follow-up are censored on the date they were last known to be alive.

    Measured: 2 years

  7. Phase 2 Relapse free survival(RFS)

    It is measured from the date of achievement of a remission until the date of relapse from CR, or CRi, or death from any cause; patients not known to have any of these events are censored on the date they were last examined.

    Measured: 2 years

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted13 Jun 2019
  2. Study start10 Jul 2017
  3. Primary completion20 Jul 2025
  4. Study completion20 Jul 2040 (estimated)

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase 1/2
Primary purpose
Treatment
Allocation
Non-randomised
Intervention model
Sequential
Masking
None (open label)
Enrolment
40 participants (estimated)
IDs, dates and publications
ClinicalTrials.gov ID
NCT03984968
Sponsor's protocol ID
SZCART01
Status last verified
Dec 2025
First submitted
11 Jun 2019
Last updated
7 May 2026
Results posted
No
FDA-regulated drug
No
FDA-regulated device
No
Individual data sharing
Yes: Baseline characteristics of patients, outcomes

Publications

  • Chen LY, Gong WJ, Li MH, Zhou HX, Xu MZ, Qian CS, Kang LQ, Xu N, Yu Z, Qiao M, Zhang TT, Zhang L, Tian ZL, Sun AN, Yu L, Wu DP, Xue SL. Anti-CD19 CAR T-cell consolidation therapy combined with CD19+ feeding T cells and TKI for Ph+ acute lymphoblastic leukemia. Blood Adv. 2023 Sep 12;7(17):4913-4925. doi: 10.1182/bloodadvances.2022009072.

    PubMed 36897251

Questions about this trial

What is this clinical trial studying?

A Phase 1/2 study testing ssCART-19 cells combined with CD19+ feeding T cells (FTCs) infusion in people with Acute Lymphoblastic Leukemia, Adult B-Cell, run by The First Affiliated Hospital of Soochow University at 1 site in China.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 6 inclusion and 13 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: under way, not looking for participants, as of the sponsor's last update on 7 May 2026. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 1 site in China. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

What does this combined phase mean?

Phase 1 studies test a treatment in a small group of people for the first time or in a new way, mainly to check safety and find the right dose.

Phase 2 studies give the treatment to a larger group to see whether it has the intended effect and to keep checking safety.

Not every study follows the same path, and some studies (observational studies, device studies) have no phase.

Are results available for this study?

This study is still under way. Results are not available in the source record yet.

How can a doctor refer a patient or contact the research team?

The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Phase 1 Incidence of adverse events (AEs) and abnormal laboratory test results (time frame: 6 months after ssCART-19 consolidation termination (CAR-T4; each cycle is 3 months)). The study lists 2 primary outcomes in all. It is what the study was designed to measure, not a finding.

Where can I read the original study information?

On the ClinicalTrials.gov record for NCT03984968, which also lists 1 linked publication.

Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 7 May 2026; AzTrials last refreshed its copy on 6 Nov 2026.

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