Cell Therapy for CD7 Positive T-cell Acute Lymphoblastic Leukemia and Lymphoblastic Lymphoma Using CD7-Specific CAR-T Cells

Sponsor

Hebei Senlang Biotechnology Inc., Ltd. (Industry)

Overall Status

Completed

CT.gov ID

NCT04572308

Collaborator

(none)

Enrollment

Location

Arm

7.9

Actual Duration (Months)

2.5

Patients Per Site Per Month

Study Details

Study Description

Brief Summary

This is an open, single-arm, clinical study to evaluate efficacy and safety of anti CD7 CAR-T cell in the treatment of relapsed or refractory T-cell acute lymphoblastic leukemia (T-ALL) and lymphoblastic lymphoma (TLBL).

Condition or Disease	Intervention/Treatment	Phase
T-cell Acute Lymphoblastic Leukemia/Lymphoma	Biological: CD7 CAR-T	Phase 1

Detailed Description

The CARs consist of an anti-CD7 single-chain variable fragment（scFv）, a portion of the human CD137（4-1BB） molecule, and the intracellular component of the human CD3ζ molecule. Prior to CAR-T cell infusion, the patients will be subjected to preconditioning treatment. After CAR-T cell infusion, the patients will be evaluated for adverse reactions and efficacy.

The Main research objectives:

To evaluate the safety and efficacy of CD7 CAR-T cells in patients with relapsed or refractory T-ALL/LBL

The Secondary research objectives:

To investigate the cytokinetic characteristics of CD7 CAR-T cells in patients with relapsed or refractory T-ALL/LBL

Study Design

Study Type:

Interventional

Actual Enrollment :

20 participants

Allocation:

N/A

Intervention Model:

Single Group Assignment

Masking:

None (Open Label)

Primary Purpose:

Treatment

Official Title:

Cell Therapy for CD7 Positive T-cell Acute Lymphoblastic Leukemia and Lymphoblastic Lymphoma Using CD7-Specific CAR-T Cells

Actual Study Start Date :

Oct 1, 2020

Actual Primary Completion Date :

May 30, 2021

Actual Study Completion Date :

May 30, 2021

Arms and Interventions

Arm	Intervention/Treatment
Experimental: CD7 CAR-T Patients will be treated with CD7 CAR-T cells	Biological: CD7 CAR-T Patients will be treated with CD7 CAR-T cells Biological: CD7 CAR-T; Drug: Cyclophosphamide,Fludarabine; Procedure: Leukapheresis;

Arm

Intervention/Treatment

Experimental: CD7 CAR-T

Patients will be treated with CD7 CAR-T cells

Biological: CD7 CAR-T

Patients will be treated with CD7 CAR-T cells Biological: CD7 CAR-T; Drug: Cyclophosphamide,Fludarabine; Procedure: Leukapheresis;

Outcome Measures

Primary Outcome Measures

Safety: Incidence and severity of adverse events [First 1 month post CAR-T cells infusion]
To evaluate the possible adverse events occurred within the first one month after CD7 CAR-T infusion, including the incidence and severity of symptoms such as cytokine release syndrome and neurotoxicity
Efficacy: Remission Rate [3 months post CAR-T cells infusion]
Remission Rate including complete remission(CR)、CR with incomplete blood count recovery(CRi)、partial remission(PR), No remission(NR), overall remission (OR)

Secondary Outcome Measures

duration of response (DOR) [24 months post CAR-T cells infusion]
duration of response (DOR)
Efficacy: progression-free survival (PFS) [24 months post CAR-T cells infusion]
progression-free survival (PFS) time
CAR-T proliferation [3 months post CAR-T cells infusion]
the copy number of CD7 CAR- T cells in the genomes of PBMC by qPCR method
CAR-T proliferation [3 months post CAR-T cells infusion]
percentage of CD7 CAR- T cells measured by flow cytometry method
Cytokine release [First 1 month post CAR-T cells infusion]
Cytokine( IL-6,IL-10,IFN-γ,TNF-α ) concentration (pg/mL) by flow cytometry method
Pharmacokinetics (PK) indicators: [Long time]
the peak concentration of Senl-T7 CAR-T cells amplified in the peripheral blood (Cmax, detected by flow cytometry and qPCR); the time taken to reach the peak concentration (Tmax), and the persistent time of the Senl-T7 CAR-T cells in vivo in patients;
Pharmacodynamic (PD) indicators: [First 1 month post CAR-T cells infusion]
the pharmacodynamic change in the clearance of peripheral blood CD7+ cells and the release of the cytokines at each observation time point

Eligibility Criteria

Criteria

Ages Eligible for Study:

2 Years to 65 Years

Sexes Eligible for Study:

All

Accepts Healthy Volunteers:

Inclusion Criteria:

Diagnosis of refractory or relapsed T-cell acute lymphoblastic leukemia (T-ALL) or lymphoblastic lymphoma (T-LBL) according to the NCCN 2019.V2 Guideline. Refractory T-ALL is defined as a patient who has failed to achieve complete remission after induction therapy. Relapsed T-ALL is defined as the reappearance of blasts (5%) in either peripheral blood or bone marrow. Patients whose tumor burden >5% blasts, or who have persistent positive minimal residual disease (MRD), or have reappearance of extramedullary lesions are also considered eligible.
CD7-positive tumor (≥70% CD7 positive blasts by flow cytometry or immunohistochemistry (tissue) assessed by a CLIA certified Flow Cytometry/Pathology laboratory). tumors burden >5%,or MRD+， or new extramedullary lesions reappeared.
Life expectancy greater than 12 weeks
KPS or Lansky score≥60
HGB≥70g/L
oxygen saturation of blood>90%
Total bilirubin (TBil)≤3 × upper limit normal, aspartate aminotransferase (AST) and alanine aminotransferase (ALT) ≤ 5×upper limit of normal
Informed consent explained to, understood by and signed by patient/guardian.

Exclusion Criteria:

Any of the following cardiac criteria: Atrial fibrillation/flutter; Myocardial infarction within the last 12 months; Prolonged QT syndrome or secondary prolonged QT, per investigator discretion. Cardiac echocardiography with LVSF (left ventricular shortening fraction)<30% or LVEF(left ventricular ejection fraction)<50%; or clinically significant pericardial effusion. Cardiac dysfunction NYHA(New York Heart Association) III or IV (Confirmation of absence of these conditions on echocardiogram within 12 months of treatment)
Has an active GvHD;
Has a history of severe pulmonary function damaging;
With other tumors which is/are in advanced malignant and has/have systemic metastasis;
Severe or persistent infection that cannot be effectively controlled；
Presence of severe autoimmune diseases or immunodeficiency disease;
Patients with active hepatitis B or hepatitis C([HBVDNA+]or [HCVRNA+]);
Patients with HIV infection or syphilis infection;
Has a history of serious allergies to biological products (including antibiotics);
Clinically significant viral infection or uncontrolled viral reactivation of EBV(Epstein-Barr virus), CMV(cytomegalovirus), ADV(adenovirus), BK-virus, or HHV(human herpesvirus)-6.
Presence of any symtomatic CNS disorder such as an uncontrolled seizure disorder, cerebrovascular ischemia/hemorrhage, dementia, cerebellar disease, or any autoimmune disease with CNS involvement;
Received allogeneic hematopoietic stem cell transplantation within 6 months;
Being pregnant and lactating or having pregnancy within 12 months;
Any situations that the researchers believe will increase the risks for the subject or affect the results of the study.