Bispecific CD19/CD22 CAR-T for Treatment of Children and Young Adults With r/r B-ALL

Safety and Efficiency of Anti-CD19/CD22 Tandem Fully Human Chimeric Antigen Receptor (CAR)-Transduced T-cell Therapy for Pediatric and Young Adult Patients With Relapsed/Refractory B-cell Acute Lymphoblastic Leukemia: a Single Centre, Non-randomised, Open Label Phase I-II Clinical Trial of Automatically Produced Cell Therapy Product MB-CAR-T19-22 Using CliniMACS Prodigy

The purpose of this study is to evaluate the safety and efficiency of autologous CD19/CD22 CAR-T lymphocytes in a cohort of pediatric and young adult patients with relapsed /refractory B-lineage acute lymphoblastic leukemia

Study Overview

• Status: Active, not recruiting
• Conditions: B-ALL
• Intervention / Treatment: Drug: CD19/CD22 CAR-T

Detailed Description

The main objectives of the study are:

• To investigate the incidence of adverse events of grade 3-5 within after CD19/CD22 CAR lymphocyte infusion by day 28,
• To evaluate the incidence of complete remission and MRD-negative CR by day 28
• To evaluate the long-term effectiveness of CD19/CD22 CAR-T therapy (cumulative incidence of relapse, event-free survival, overall survival) at 1, 2, and 5 years after infusion.
• To evaluate the persistence of CD19/CD22 CAR-T cells and duration of B-cell aplasia (<1% B-cells in the blood) and hypogammaglobulinemia In order to prevent the development of CRS, all patients will receive an infusion of tocilizumab at 8 mg/kg body weight on day 0 before CAR-T cells infusion.

Step-down and step-up dosing will be used to adapt the trial to the scenario of excess toxicity and/or suboptimal effect. Reevaluation of dosing will be done for each cohort separately after the enrollment 5th study subject reaches day 28 or earlier if the threshold for excess toxicity or suboptimal effect is achieved.

Based on interim analysis in March 2021 after the enrollment 5th study subject reaches day 28 study population will be divided into three cohorts:

1. CD19-positive (both CD19 and CD22 expressed on over 50% of leukemia cells), low and high disease burden.
2. CD19-negative (CD22 expressed on over 50% of leukemia cells) low and high disease burden;
3. Allogeneic HSCT+ allogeneic CAR-T cohort

• Study Type: Interventional
• Enrollment (Anticipated): 50
• Phase: Phase 2; Phase 1

Contacts and Locations

• Study Contact: Name: Olga Molostova; Phone Number: 7535 +7(495)2876570; Email: Olga.molostova@gmail.com

Study Locations

• Russian Federation
  • Moscow, Russian Federation, 117198
    • Federal Research Institute of Pediatric Hematology, Oncology and Immunology

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 3 months to 25 years (Child, Adult)
• Accepts Healthy Volunteers: No
• Genders Eligible for Study: All

Description

Inclusion Criteria:

• Ability to give informed consent (for patients > 14 years old). For subjects < 18 years old their legal guardian must give informed consent
• CD19 or CD22 expression must be detected on greater than 50% of leukemic cells by flow cytometry
• Presence of a measurable mass of tumor cells in the bone marrow or extramedullary sites at the time of patient's inclusion in the study

• Patients with relapsed or refractory CD19 and CD22-expressing B-cell ALL:

  • Induction failure
  • MRD ≥ 0,1% after 2nd chemotherapy course for high-risk group patients.
  • First bone marrow or combined relapse of acute lymphoblastic leukemia, no CR or MRD ≥ 0,1% after 1-course 2nd line therapy
  • Second and further relapse of ALL
  • Relapse or MRD ≥ 0,1% of ALL after hematopoietic stem cell transplant (> 60 days post alloHSCT)o There must be no available alternative approved curative therapies
• Patient Clinical Performance Status: Karnofsky >50% or Lansky >50%
• Patient Life Expectancy > 4 weeks
• Patients recovered from acute toxic effects of prior chemotherapy, immune- or radiotherapy
• Patient absolute blood naïve (CD45RA+) T-lymphocyte count ≥ 50/mm3
• Patient cardiac function left ventricular ejection fraction greater than or equal to 40% by MUGA or cardiac MRI, or fractional shortening greater than or equal to 28% by ECHO or left ventricular ejection fraction greater than or equal to 50% by ECHO.
• Patients who agree to long-term follow up for up to 5 years (if received CD19/CD22 CAR-T cell infusion)
• March 2021 amendment: Healthy HLA-matched related or haploidentical donor (only for HSCT cohort)

Exclusion Criteria:

• <50% expression of both CD19 and CD22 on the leukemic population
• Active (detectable viremia) hepatitis B, C or HIV infection
• Oxygen saturation ≤ 90%
• Bilirubin >3x upper norma limit
• Creatinine >3x upper norma limit
• Active acute GVHD overall grade ≥2 (Seattle criteria)
• Moderate/severe chronic GVHD (NIH consensus) requiring systemic steroids
• Clinical signs of grade > 3 CNS disorders (seizure disorder, paresis, aphasia, cerebrovascular, ischemia/hemorrhage, severe brain injuries, dementia, cerebellar disease, organic brain syndrome, psychosis, coordination or movement disorder)
• Pregnant or lactating women.
• Active (unresolved) severe infection

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: N/A
• Interventional Model: Single Group Assignment
• Masking: None (Open Label)

Number of Arms

1

Arms and Interventions

Participant Group / Arm

Intervention / Treatment

Experimental: intervention/treatment; Intervention: Patient (cohort 1 and 2) or donor (cohort 3) leukapheresis; Drug therapy:Fludarabine 120 mg/m2Cyclophosphamide 750 mg/m2Etoposide 450 mg/m2Cytarabine 900 mg/m2Dexamethasone 30 mg/m2Tocilizumab 8 mg/kg BW; Biological: Cohort 1 and 2: autologous CD19/CD22 CAR-T lymphocytes, dose 0.15 - 1.5х106/kg Cohort 3: allogeneic CD19/CD22 CAR-T lymphocytes, dose 0.1х106/kg + allogeneic HSCT from a haploidentical or matched related donor

Drug: CD19/CD22 CAR-T; The treatment plan will be based on stratification by the initial leukemia burden. Patients with "low disease burden" will receive a lymphodepletion chemotherapy of fludarabine (total dose 120mg/m2) and cyclophosphamide (total dose 750mg/m2) over 5 days. Patients will "high disease burden" will receive a lymphodepletion chemotherapy of fludarabine (total dose 120 mg/m2), cyclophosphamide (total dose 750 mg/m2), cytarabine (total dose 900 mg/m2), etoposide (total dose 450 mg/m2), dexamethasone (total dose 30 mg/m2) over 5 days. Based on interim analysis the following dosing approach will be implemented starting April 2021: Cohort 1: CD19+ disease, low and high burden: 1st dose - 150k/kg, 2nd dose - 850k/kg Cohort 2: CD19- disease, low and high burden: 1st dose - 500k/kg, 2nd dose - 500k/kg Cohort 3: HSCT+CAR-T: 100k/kg; Other Names: Dexamethasone; Cytarabine; Cyclophosphamide; Etoposide; Fludarabine; Tocilizumab; Allogeneic HSCT

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
incidence of grade 3-5 SAE	Safety: Toxicity evaluation following CD19/CD22 CAR T-cell infusion: - incidence of grade 3-5 SAE (according CTCAE v.5.0)	1 month
incidence of grade 3-5 Severe Cytokine Release Syndrome	Safety: Toxicity evaluation following CD19/CD22 CAR T-cell infusion: - incidence of grade 3-5 Severe Cytokine Release Syndrome (according ASTCT consensus)	1 month
incidence of grade 3-5 ICANS	Safety: Toxicity evaluation following CD19/CD22 CAR T-cell infusion: - incidence of grade 3-5 ICANS (according to ASTCT consensus)	1 month
Rate of complete remission	Efficacy: - Rate of complete remission among all enrolled patients (Intent-to-Treat population)	1 month
Rate of MRD-negative remission	Efficacy: - Rate of MRD-negative remission among all patients (Intent-to-treat population)	1 month
March 2021 amendment: incidence of graft failure before day 100 (only for HSCT cohort)	Safety:	100 days
March 2021 amendment: incidence of aGVHD grade 2-4 (only for HSCT cohort)	Safety:	100 days

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Duration of MRD-negative remission	Efficacy:	2 years
Persistence/frequency of CD19/CD22 lymphocytes in peripheral blood (flow cytometry)	Efficacy:	2 years
Duration of B-cell aplasia and hypogammaglobulinemia	Efficacy:	2 years
Overall survival	Efficacy:	5 years
Safety and adverse effects long-term	Safety:	5 years
March 2021 amendment: Incidence of chronic GVHD (only for HSCT cohort)	Safety:	5 years

Collaborators and Investigators

• Sponsor: Federal Research Institute of Pediatric Hematology, Oncology and Immunology
• Investigators: Principal Investigator: Michael Maschan, National Research Center for Pediatric Hematology , Moscow, Russian Federation

Study record dates

Study Major Dates

• Study Start (Actual): July 27, 2020
• Primary Completion (Actual): March 13, 2022
• Study Completion (Anticipated): March 13, 2027

Study Registration Dates

• First Submitted: July 31, 2020
• First Submitted That Met QC Criteria: July 31, 2020
• First Posted (Actual): August 5, 2020

Study Record Updates

• Last Update Posted (Estimate): February 22, 2023
• Last Update Submitted That Met QC Criteria: February 21, 2023
• Last Verified: February 1, 2023

More Information

Terms related to this study

• Keywords: CAR-T; acute lymphoblastic leukemia; B-ALL
• Additional Relevant MeSH Terms: Physiological Effects of Drugs; Molecular Mechanisms of Pharmacological Action; Anti-Infective Agents; Autonomic Agents; Peripheral Nervous System Agents; Antiviral Agents; Enzyme Inhibitors; Anti-Inflammatory Agents; Antirheumatic Agents; Antimetabolites, Antineoplastic; Antimetabolites; Antineoplastic Agents; Immunosuppressive Agents; Immunologic Factors; Antiemetics; Gastrointestinal Agents; Glucocorticoids; Hormones; Hormones, Hormone Substitutes, and Hormone Antagonists; Antineoplastic Agents, Hormonal; Antineoplastic Agents, Alkylating; Alkylating Agents; Myeloablative Agonists; Antineoplastic Agents, Phytogenic; Topoisomerase II Inhibitors; Topoisomerase Inhibitors; Dexamethasone; Cyclophosphamide; Etoposide; Fludarabine; Cytarabine
• Other Study ID Numbers: NCPHOI-2020-07

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: UNDECIDED

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No