CD19/79b Bi-specific CAR-T Cell Therapy
For patients and families
In plain language
An automatic summary of structured registry data. It is an orientation aid, not a substitute for the official protocol or a physician assessment.
- What is being studied
- The protocol lists: bi-4SCAR CD19/79b T cells.
- Who it may be relevant to
- Registry conditions: B Cell Malignancies. Basic parameters: 6 months — 75 years · All.
- What needs checking
- Age, condition and sex are only basic indicators. Prior treatment, laboratory values and other mandatory requirements appear in the eligibility criteria below.
- Where it takes place
- China
- Next step
- Save the trial, show it to the treating physician, and confirm current recruitment with the study center. Costs, documents and travel →
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Official title
CD19/79b Bi-specific CAR-T Cells Targeting B Cell Malignancies
Overview
The purpose of this study is to assess the feasibility, safety and efficacy of CD19/79b bi-specific CAR-T cell therapy in patients with CD19 and/or CD79b positive B cell malignancies. Another goal of the study is to learn more about the safety and function of the anti-CD19/79b bi-specific CAR-T cells and their persistency in patients.
Detailed description
Patients with refractory and/or recurrent B cell malignancies have poor prognosis despite complex multimodal therapy. Despite impressive progress, more than 50% of patients treated with CD19-targeting chimeric antigen receptor T cells (CAR19) experience progressive disease. Further, more than 40% patients with progressive large B cell lymphoma (LBCL) experienced reduced or lost expression of CD19 on the tumor cells after CAR19 treatment; low surface CD19 density before treatment was associated with progressive disease. Therefore, novel curative approaches are needed. The investigation attempts to use genetically modified T cells to express a 4th generation lentiviral anti-CD19/79b bi-specific CAR (bi-4SCAR-CD19/79b). The CAR molecules enable the T cells to recognize and kill tumor cells through the recognition of a surface antigen, CD19 or CD79b, which is expressed at high levels on tumor cells but not at significant levels on normal tissues.
CD79b is a B cell surface antigen, which is a component of B cell receptor. CD79b is up-regulated in more than 90% of B-cell lymphomas. Recent studies have shown that CD79b CAR-T cells have potential in targeting B-cell lymphomas. In addition, several immunotherapy drugs based on targeting CD79b have been reported worldwide. The CD79b specific CAR-T cells with binding moiety of CD79b specific scFv exhibited a high affinity and antitumor effect against CD79b+ tumor cells.
A potential strategy to prevent relapse due to antigen escape is to infuse T-cells capable of recognizing multiple antigens. To overcome tumor escape of single target antigen and enhance in vivo CAR-T efficacy, a novel bi-specific CD19/79b CAR-T therapy regimen is developed to include booster and consolidation CAR-T applications to target highly-refractory B cell cancer. The aim is to evaluate safety and long term efficacy of the bi-CAR-T therapy strategy in CD19 and/or CD79b positive cancer patients.
Interventions
- Biological bi-4SCAR CD19/79b T cells
Infusion of bi-4SCAR-CD19/79b T cells at 10\^6 cells/kg body weight via IV
Primary outcome measures
- Safety of fourth generation bi-4SCAR-CD19/79b T cells in patients with B cell malignancies [Time frame: 12 weeks]
Secondary outcome measures (2)
- Anti tumor activity of fourth generation bi-4SCAR-CD19/79b T cells in patients with relapsed or refractory B cell malignancies [Time frame: 1 year]
- Anti tumor activity of fourth generation bi-4SCAR-CD19/79b T cells in patients with relapsed or refractory B cell malignancies [Time frame: 1 year]
Eligibility criteria
Inclusion criteria
- age older than 6 months.
- malignant B cell surface expression of CD19 or CD79b molecules.
- the KPS score over 80 points, and survival time is more than 1 month.
- greater than Hgb 80 g/L.
- no contraindications to blood cell collection.
Exclusion criteria
- accompanied with other active diseases and difficult to assess patient response.
- bacterial, fungal, or viral infection, unable to control.
- living with HIV.
- active HBV or HCV infection.
- pregnant and nursing mothers.
- under systemic steroid treatment within a week of the treatment.
- prior failed CD19 and CD79b CAR-T treatment.
Criteria are shown verbatim from the registry (in English). Final eligibility is always assessed by the study center.
Healthy volunteers: No
Study design
- Allocation
- N/A
- Model
- Single group
- Masking
- Open label
- Primary purpose
- Treatment
Study locations
China · 1 center
- Shenzhen Geno-immune Medical Institute — Shenzhen
Identifiers
NCT: NCT05436509 · GIMI-IRB-22009