Phase II Study of Anti-CD19 CAR-T Cells Treating Leukemia Children

NCT04325841 | Completed Phase 2

• 1 other identifier: BR-19-C
• Study Type: interventional
• Target: 2
• Locations: 1 country
• Sites: 1

Brief Summary

The investigators will conduct a phase II clinical trial of autologous murine anti-CD19 chimeric antigen receptor T cells treating refractory or relapsed B acute lymphoblastic leukemia children in Beijing Boren Hospital. The study will be approved by the institutional review board of Beijing Boren Hospital, and informed consent will be obtained in accordance with the Declaration of Helsinki. All these participants will be matched the diagnostic criteria for (r/r) B-ALL according to the WHO classification and complete morphological evaluation, immunophenotype analysis by flow cytometry (FCM), cytogenetic analysis by routine G-banding karyotype analysis and leukemia fusion gene screening by multiplex nested reverse transcriptase-polymerase chain reaction (PCR). Participants will be eligible if they are heavily treated B-ALL who failed from re-induction chemotherapy after relapse or continued MRD+ for more than three months, and had positive CD19 expression on leukemia blasts by FCM (\>95% CD19). After CAR T-cell infusion, clinical outcomes including overall survival (OS), Disease-free survival (DFS), adverse effects and relapse will be evaluated.

Conditions

Acute Lymphoblastic Leukemia, Pediatric; Acute Lymphoblastic Leukemia, in Relapse; Refractory Acute Lymphoblastic Leukemia

Outcome Measures

Primary Outcomes (1)

• CR rate

  The complete remission(CR) rate to the CAR-T treatment

  1 month

Study Arms (1)

Autologous Murine Anti-CD19 CAR-T treatment

EXPERIMENTAL

Biological: Murine autologous anti-CD19 chimeric antigen receptor T cells

Interventions

Murine autologous anti-CD19 chimeric antigen receptor T cells BIOLOGICAL

CAR-T cells were manufactured from peripheral blood mononuclear cells collected by leukapheresis and frozen for multiple uses. Before each CAR T-cell infusion (day 0), patients received lymphodepleting chemotherapy composing of Fludarabine (30 mg/m2/day) and Cyclophosphamide (250 mg/m2/day) on days -5 to -3. No bridging chemotherapy was given between enrollment and infusion. In CD19 T cell clinical trials, CAR-T cells was given once. All patients underwent bone marrow (BM) biopsy examination and radiology studies on days 30 and every month to determine the response and remission status. Bone biopsy, MRD status by FCM and RT-PCR (if the patient had fusion gene), and EMDs evaluation by CT/MRI/PET-CT were also conducted before CAR-T cell infusion to determine the disease status.

Autologous Murine Anti-CD19 CAR-T treatment

Eligibility Criteria

• Age: 0 Years - 18 Years
• Sex: all
• Healthy Volunteers: No
• Age Groups: Child (0-17), Adult (18-64)

You may qualify if:

• Patients who were diagnosed as primary refractory or relapsed B-ALL. All the patients matched the diagnostic criteria of ALL according to the WHO classification and conducted morphological evaluation, immunophenotype analysis by flow cytometry (FCM), cytogenetic analysis by routine G-banding karyotype analysis, screen of 56 leukemia-related fusion genes by multiplex nested reverse transcriptase-polymerase chain reaction (RT-PCR), and quantification of fusion genes by real-time PCR with ABL1 as reference. Extramedullary diseases (EMDs) were confirmed CD19+ by FCM and evaluated by positron emission tomography/computed tomography (PET/CT), CT, MRI or ultrasonography. The patient relapsed during chemotherapy or failed from re-induction chemotherapy (including first and second-generation TKIs) after relapse or had a persistent positive minimal residual disease (MRD) for three months. Patients had positive CD19 expression on leukemia blasts by FCM (\>95% CD19 positive);
• Age from 0 to 18 years old;
• Children candidates can be recruited after the legal guardian or patient advocate has signed the treatment consent form and voluntary consent form;

You may not qualify if:

• Intracranial hypertension or unconscious;
• Acute heart failure or severe arrhythmia;
• Acute respiratory failure;
• Other types of malignant tumors;
• Diffuse intravascular coagulation;
• Serum creatinine and/or blood urea nitrogen over 1.5 times than normal range;
• Sepsis or other uncontrolled infection;
• Uncontrolled diabetes mellitus;
• Severe psychological disorder;
• Obvious cranial lesions with cranial MRI;
• More than 20 counts/ul leukemic cells in cerebrospinal fluid;
• More than 30% leukemic cells in the blood;
• Stage III WHO/ECOG score;
• Organ recipients;
• Pregnant or breastfeeding;

Sponsors & Collaborators

• Beijing Boren Hospital: lead

Study Sites (1)

Beijing Boren Hospital

Beijing, Beijing Municipality, 100000, China

Location

MeSH Terms

Conditions

Precursor Cell Lymphoblastic Leukemia-Lymphoma

Condition Hierarchy (Ancestors)

Leukemia, Lymphoid; Leukemia; Neoplasms by Histologic Type; Neoplasms; Hematologic Diseases; Hemic and Lymphatic Diseases; Lymphoproliferative Disorders; Lymphatic Diseases; Immunoproliferative Disorders; Immune System Diseases

Study Design

• Study Type: interventional
• Phase: phase 2
• Allocation: NA
• Masking: NONE
• Purpose: TREATMENT
• Intervention Model: SINGLE GROUP
• Sponsor Type: OTHER
• Responsible Party: SPONSOR

Study Record Dates

• First Submitted: March 26, 2020
• First Posted: March 30, 2020
• Study Start: March 24, 2022
• Primary Completion: April 3, 2024
• Study Completion: April 3, 2024
• Last Updated: May 18, 2025

Record last verified: 2025-05

Data Sharing

• IPD Sharing: Will not share

Locations

CN (1)