Universal CAR-T Cells Targeting AML

Phase 1

Recruiting

• Conditions: Acute Myeloid Leukemia
• Interventions: Biological: CLL-1, CD33, CD38 and/or CD123-specific universal CAR- T cells

• Registration Number: NCT05995041
• Lead Sponsor: Shenzhen Geno-Immune Medical Institute

Brief Summary

The purpose of this clinical trial is to assess the feasibility, safety and efficacy of universal CAR T-cell products targeting CLL-1, CD33, CD38 and CD123 in patients with relapsed and refractory AML. The study also aims to learn more about the function of the universal CAR T cells and their persistency in AML patients.

Detailed Description

Acute myeloid leukemia (AML) is a malignant disease characterized by the rapid growth of myeloblasts that grow in the bone marrow and interferes with the generation of normal blood cells.Over the past years, several groups have demonstrated that CLL1, CD33, CD38 and CD123 are potential AML targets. CLL-1 (C-type lectin-like molecule-1) is a transmembrane glycoprotein, which is overexpressed in leukemic stem cells but absent in normal hematopoietic stem cells, suggesting that CLL-1 can be a promising target for targeted AML therapy. Although CAR-T cells have shown impressive anti-leukemic effect in B cell disease, CAR-T treatment for AML has proven to be more difficult. One of the reasons is because AML patients often has highly suppressed bone marrow function, and it is often difficult to obtain good quality of T cells for CAR-T preparation. In addition, AML progression can be acute and rapid, which can outpace the CAR-T expansion, and the time-consuming CAR-T manufacture process makes it more difficult to treat AML with autologous source of T cells By using universal type of CAR-T cells, the product can be supplied off-the-shelf without being customized from individual patients. In addition, the immediate availability means that patients with short disease remission time under severe bone marrow suppression may get a chance to be treated with CAR-T cells to achieve disease remission. In addition, those patients who suffer from long-term immunosuppression due to tumor microenvironment or myelosuppressive chemotherapy would have the option of treatment with the universal CAR-T cells.

The purpose of this study is to assess the feasibility, safety and efficacy of several AML-specific universal CAR-T products. Another goal is to learn more about the function of the universal CAR T cells and their persistency in the patients.

Study Timeline

• Study First Submitted: 2023-08-08
• Study First Submitted QC: 2023-08-08
• Study First Posted: 2023-08-16
• Status Verified: 2023-10
• Last Update Submitted: 2023-10-10
• Last Update Posted: 2023-10-12
• Study Start: 2023-10-31
• Primary Completion: 2026-09-30
• Study Completion: 2026-12-31

Recruitment & Eligibility

• Status: RECRUITING
• Sex: All
• Target Recruitment: 30

Inclusion Criteria

1. Age older than 6 months.
2. Confirmed expression of CLL-1, CD123, CD38 and/or CD33 in AML blasts by immuno-histochemical staining or flow cytometry.
3. Karnofsky performance status (KPS) score is higher than 80 and life expectancy > 3 months.
4. Adequate bone marrow, liver and renal function as assessed by the following laboratory requirements: cardiac ejection fraction ≥ 50%, oxygen saturation ≥ 90%, creatinine ≤ 2.5 × upper limit of normal, aspartate aminotransferase (AST) and alanine aminotransferase (ALT) ≤ 3 × upper limit of normal, total bilirubin ≤ 2.0mg/dL.
5. Hgb≥80g/L.
6. No cell separation contraindications.
7. Abilities to understand and the willingness to provide written informed consent.

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Exclusion Criteria

1. Sever illness or medical condition, which would not permit the patient to be managed according to the protocol, including active uncontrolled infection.
2. Active bacterial, fungal or viral infection not controlled by adequate treatment.
3. Known HIV or active hepatitis C virus (HCV) infection.
4. Pregnant or nursing women may not participate.
5. Use of glucocorticoid for systemic therapy within one week prior to entering the trial.
6. Previous treatment with any gene therapy products.
7. The bone marrow AML burden (MRD) is above 50%.
8. Patients, in the opinion of investigators, may not be able to comply with the study.

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Study & Design

• Study Type: INTERVENTIONAL
• Study Design: SINGLE_GROUP

Arm && Interventions

Group	Intervention	Description
Multiple universal CAR T cells to treat AML	CLL-1, CD33, CD38 and/or CD123-specific universal CAR- T cells	-

Primary Outcome Measures

Name	Time	Method
Safety of infusion	6 months	Treatment-related adverse events are assessed by NCI CTCAE V4.0 criteria.

Secondary Outcome Measures

Name	Time	Method
Clinical response	1 year	Objective responses (complete response (CR) + partial response (PR)) are assessed by the Response Evaluation Criteria in Solid Tumors (RECIST) v1.1 criteria.

Trial Locations

Locations (1)

Shenzhen Geno-Immune Medical Institute; 🇨🇳 Shenzhen, Guangdong, China