Evaluation of the Safety and Efficacy of Human CI-135 (FLT3) Targeted CAR-T Cells Injection for Subjects with Relapsed/Refractory Acute Myeloid Leukemia

Early Phase 1

Recruiting

• Conditions: Acute Myeloid Leukemia (AML)
• Interventions: Drug: Human Derived anti-CI135 CAR-T Injection

• Registration Number: NCT06760260
• Lead Sponsor: Hrain Biotechnology Co., Ltd.

Brief Summary

This study is a single-arm, open-label, dose-escalating trial to explore the safety, tolerability and pharmacokinetic/pharmacodynamics characteristics of anti human CI-135 (FLT3) CAR-T Injection , and to preliminarily observe the efficacy of the trial drug in patients with relapsed/refractory Acute Myeloid Leukemia.

Detailed Description

Not available

Study Timeline

• Study Start: 2022-01-26
• Study First Submitted: 2024-12-30
• Study First Submitted QC: 2024-12-30
• Status Verified: 2025-01
• Last Update Submitted: 2025-01-05
• Study First Posted: 2025-01-06
• Last Update Posted: 2025-01-07
• Primary Completion: 2025-12-31
• Study Completion: 2026-12-31

Recruitment & Eligibility

• Status: RECRUITING
• Sex: All
• Target Recruitment: 7

Inclusion Criteria

Subjects must meet all of the following criteria to be enrolled:

• Subjects volunteer to participate in clinical trails, understand and inform the trials and sign informed consent form, be willing to complete all the trial procedures;

• Aged from 18 to 70 years (including cut-off value), Male and female;

• Expected survival > 12 weeks;

• Previously diagnosed as Acute Myeloid Leukemia by ELN updated criteria (2017) and one of the following indicators that is satisfied:

  1. AML patients who have not achieved complete remission (CR) after at least three cycles of standard induction therapy, or
  2. AML patients who achieved complete remission after induction therapy but relapsed within one year, or
  3. AML patients who achieved complete remission after induction therapy for more than one year but did not achieve remission after one cycle of chemotherapy with the original regimen following relapse, or
  4. AML patients who relapsed after transplantation, or
  5. AML patients who experienced two or more relapses. Note: For patients meeting conditions a), b), or c) with FLT3 mutations, they must have undergone at least one treatment with a tyrosine kinase inhibitor (TKI) without achieving complete remission or have relapsed after achieving complete remission, except for those who cannot tolerate TKI therapy or have contraindications to TKI treatment.

• Positive for FLT3 mutation confirmed by leukemia cell genetic testing, or FLT3 expression ≥35%;

• ECOG performance status score of 1-2;

• Liver, kidney, heart, and lung functions meeting the following criteria:

  1. Glomerular filtration rate (GFR) ≥60 ml/min/1.73 m² or serum creatinine ≤2 times the upper limit of normal (ULN);
  2. Serum AST and ALT ≤3 times of ULN, and total bilirubin ≤1.5 times the ULN;
  3. Oxygen saturation > 92%;
  4. Left ventricular ejection fraction (LVEF) ≥50%, with no pericardial effusion observed on ultrasound, and no clinically significant electrocardiographic abnormalities.

• Able to understand the study and sign the informed consent form.

Exclusion Criteria

• Diagnosed as acute promyelocytic leukemia (APL M3);
• With any presence of other uncontrolled malignancies (unless evaluated as unlikely to interfere with the safety or efficacy assessment of the trial);
• Previously treated with CAR-T cells or other genetically modified cellular therapies
• Displayed history or evidence of significant cardiovascular risks, including any of the following: congestive heart failure, unstable angina, clinically significant arrhythmias (e.g., ventricular fibrillation, ventricular tachycardia), coronary angioplasty within 6 months before administration, implantable cardiac defibrillator, or any clinically relevant comorbidities that pose safety risks or interfere with study assessments, procedures, or completion;
• Positive for hepatitis B surface antigen (HBsAg) or hepatitis B core antibody (HBcAb) with HBV DNA levels ≥ the detection limit in peripheral blood; positive for hepatitis C virus (HCV) antibody with detectable HCV RNA; positive for human immunodeficiency virus (HIV) antibodies; or positive for syphilis testing;
• Positive for acute or chronic hepatitis C. Exceptions: acute hepatitis C with complete viral clearance; chronic hepatitis C with a sustained virological response (SVR24) 24 weeks post-treatment confirming undetectable viral load;
• Having history of arterial or venous thrombosis within 3 months prior to enrollment;
• Having history of Graft-versus-host disease requiring systemic immunomodulators;
• Having history of central nervous system diseases or conditions requiring treatment (e.g., uncontrolled seizures);
• Having uncontrolled active infections;
• Known allergy to any components of CI-135 CAR-T cell formulation or the lymphodepletion regimen (cyclophosphamide and fludarabine);
• Currently pregnant or lactating female, or female subjects planning pregnancy within 1 year after cell infusion, or male subjects with partners planning pregnancy within 1 year after infusion;
• Having other conditions deemed unsuitable for enrollment by the investigator.

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: SINGLE_GROUP

Arm && Interventions

Group	Intervention	Description
Experimental: Anti CI-135 (FLT3) CAR-T Injection	Human Derived anti-CI135 CAR-T Injection	Single administration: 0.5 \* 10\^6 CAR-T cells/kg, 1.0 \* 10\^6 CAR-T cells/kg

Primary Outcome Measures

Name	Time	Method
Dose limited toxicity (DLT)	28 days post infusion	Safety Indicator

Secondary Outcome Measures

Name	Time	Method
Pharmacokinetics parameters - Maximum CAR level in peripheral blood (Cmax)	2 years post infusion	Effectiveness Metrics
Pharmacokinetics parameters -Time to maximum CAR level in peripheral blood (Tmax)	2 years post infusion	Effectiveness Metrics
Pharmacokinetics parameters - 28-day Area under Curve of CAR level in peripheral blood (AUC0-28)	2 years post infusion	Effectiveness Metrics
Pharmacodynamics characteristics - Cytokines Concentrations, cytokines level in peripheral blood	2 years post infusion	Effectiveness Metrics, determined via ELISA, including but not limited to: Interleukin-15 (IL-15) by pg/μl blood sample; Interleukin-6 (IL-6) by pg/μl blood sample; Granzyme B by pg/μl blood sample; Interferon-γ (IFN-γ) by pg/μl blood sample; Tumor Necrocis Factor α (TNF-α) by pg/μl blood sample;
Overall Response Rate (ORR)	28 days post infusion	ORR defined as proportion of subjects who achieved Partial Remission (PR), Morphologic leukemia-free state (MLFS) or better (CR, CRi) according to the ELN 2017 as determined by an Investigator assessment at day 28.
Progression-free Survival (PFS)	2 years post infusion	PFS defined as time from date of initial infusion of CAR-T to date of first disease progression according to ELN2017 criteria, or death due to any cause, whichever occurs first.
Overall Survival (OS)	2 years post infusion	OS is measured from the date of the initial infusion of CAR-T to the date of the subject's death.
Duration of Response (DOR)	2 years post infusion	DOR will be calculated among responders (PR, MLFS or better) from the date of initial response (PR, MLFS or better) to the date of first documented evidence of progressive disease, as defined in the ELN criteria (2017).

Trial Locations

Locations (1)

First Affiliated Hospital of Soochow University; 🇨🇳 Suzhou, Jiangsu, China