Sequential Treatment With CD20/CD22/CD10-CART After CD19-CART Treatment Base on MRD in Relapsed/Refractory B-ALL
Study Details
Study Description
Brief Summary
CD19-negative B-ALL relapses after CD19 CAR T-cell treatment have occurred in some patients. CD20/CD22/CD10 is still expressed in CD19 negative B-ALL cells which means these CD molecules may become new targets in treatment of CD19-negative relapse of B-ALL. Thus sequential treatment with CD20/CD22/CD10-CART after CD19-CART treatment in relapsed/refractory B-ALL will kill and eliminate CD19 negative B-ALL cells and prolong the remission time.
Condition or Disease | Intervention/Treatment | Phase |
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Early Phase 1 |
Detailed Description
B-cell acute lymphoblastic leukemia is the most common type of leukemia and the prognosis of relapsed/refractory B-ALL is poor. Chimeric Antigen Receptor-transduced T cell (CAR-T) therapy is one of revolutionary targeted immunotherapy. CD19 CAR-T is the most commonly used engineered T cell in B-ALL. The treatment effect is significant and far more than traditional therapy in relapsed/refractory B-ALL. However, the remission time after CD19 CAR-T infusion is short.CD19-positive and CD19-negative B-ALL relapses after CD19 CAR T-cell treatment have occurred in some patients The cause of relapse after CAR-T infusion is minimal residual disease (MRD) which will induce CD19 negative relapse. CD20/CD22/CD10 is still expressed in CD19 negative B-ALL cells which means these CD molecules may become new targets in treatment of CD19 negative relapse of B-ALL. Thus sequential treatment with CD20/CD22/CD10-CART after CD19-CART treatment in relapsed/refractory B-ALL will kill and eliminate CD19 negative B-ALL cells and prolong the remission time.
Study Design
Arms and Interventions
Arm | Intervention/Treatment |
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Experimental: Sequential therapy with different CART Sequential therapy With different CART including one kind of CD20/CD22/CD10-CART After CD19-CART therapy in CD19-negative relapse ALL patients, subjects will receive 1-5 x 10^6/Kg transduced CAR T cells at one time. |
Biological: Sequential Treatment With different CART
Sequential Treatment With CD20/CD22/CD10-CART After CD19-CART Treatment in Relapsed/Refractory B-ALL
|
Outcome Measures
Primary Outcome Measures
- Adverse events that Are related to treatment [2 years]
Determine the toxicity profile of the CD19-targeted and CD20/CD22/CD10-targeted CAR-T cells with Common Toxicity Criteria for Adverse Effects (CTCAE) version 4.0.
Secondary Outcome Measures
- Estimate 2 year overall survival(OS) after infusion of CD19-CART and sequential treatment [2 years]
To estimate 2 year overall survival(OS) after CD19-CART infusion and sequential treatment with Relapsed/Refractory B-ALL
- Estimate relapse rate after infusion of CD19-CART and sequential treatment [4 years]
To estimate relapse rate after CD19-CART infusion and sequential treatment with Relapsed/Refractory B-ALL
- Estimate 2 year progression free survival after infusion of CD19-CART and sequential treatment [2 years]
To estimate 2 year progression free survival (PFS) after CD19-CART infusion and sequential treatment with Relapsed/Refractory B-ALL
Eligibility Criteria
Criteria
Inclusion Criteria:
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Relapsed/Refractory B-ALL patients
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Did not achieve complete remission after 2 times of standard plan chemotherapy
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Relapsed after first induction chemotherapy
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Did not response to chemotherapy before HSCT or relapsed after HSCT
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Cannot receive allo-HSCT or refuse to receive allo-HSCT
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Relapsed after CD19-CART infusion
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MRD monitoring confirmed positive(MRD>0.01%) after CD19-CART infusion
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Cell phenotype is CD19 negative and CD20/CD22/CD10 positive (single or combined) after CD19-CART therapy
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Estimated survival time is more than 3 months in leukemia
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Volunteered for this clinical trail and signed a consent form
Exclusion Criteria:
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MRD was negative after CD19-CART therapy
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MRD was negative while the cell phenotype was CD19 expressed
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Patients with severe insufficient cardiac, pulmonary and hepatorenal functions
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Patients with severe mental illness, neurological disease or infectious disease
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Patients with GVHD was taking immunosuppressants
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Pregnant or lactating women
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Patients have received other genetic therapy products
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Transfection efficiency was less than 30%
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Any situation may do harm to the subjects or interfere the results
Contacts and Locations
Locations
Site | City | State | Country | Postal Code | |
---|---|---|---|---|---|
1 | Southern Medical University Zhujiang Hospital | Guangdong | Guangdong | China | 510000 |
Sponsors and Collaborators
- Zhujiang Hospital
- Nanfang Hospital of Southern Medical University
Investigators
- Principal Investigator: Yanjie He, Ph.D, Zhujiang Hospital
Study Documents (Full-Text)
None provided.More Information
Publications
None provided.- 2016-XYNK-002