Safety and Efficacy of OC-1 Therapy in Patients With R/R T-ALL/LL (CARxALL)

OneChain Immunotherapeutics

Status and phase: Enrolling; Phase 1

Conditions: T-cell Acute Lymphoblastic Leukemia; Lymphoblastic T-Cell Lymphoma

Treatments: Biological: CD1a-CAR T

Study type: Interventional

Funder types: Other; Industry

Identifiers

NCT05679895

OC-01-21001

Details and patient eligibility

About

First in humans, exploratory, open-label, single-arm, multicentre, non-competitive, dose escalation study to assess the safety and efficacy of CD1a-CAR T therapy in patients with relapsed/refractory (R/R) T-cell acute lymphoblastic leukemia/lymphoma (T-ALL/LL)

Enrollment: 12 estimated patients

Sex: All

Ages: 2+ years old

Volunteers: No Healthy Volunteers

Inclusion criteria

1. Children older than 2 years or adults, male and female in both groups.

2. Patients CD1a antigen blast expression ≥20% at inclusion, either immunophenotypically (flow cytometry) or histologically confirmed.

3. R/R CD1a-positive T-ALL/LL patients, including morphologic or MRD-detectable (≥1x10-4) bone marrow and/or extramedullary relapses after 2 therapy lines:

   1. Relapse after allogeneic haematopoietic stem cell transplantation (allo-HSCT)
   2. Primary refractoriness, defined as either morphologic persistence or detectable MRD (≥1x10-4) after two standard therapy lines, making the patient not candidate for allo-HSCT.
   3. Refractory first relapse.
   4. Second or further relapse.

4. Patient without reproductive capacity or else, commitment to the use of a highly effective method of contraception during the study.

Exclusion criteria

1. Limiting organ dysfunction, such as uncontrolled cardiac (e.g., depressed left ventricular ejection fraction (LVEF), <45%), pulmonary, liver, renal or CNS dysfunction.
2. Allo-HSCT within a timeframe <3 months, or requiring continued immunosuppressive treatment for graft versus host disease (GvHD).
3. Uncontrolled epilepsy or underlying central nervous system (CNS) severe disease.
4. Active bacterial, fungal or viral infection not controlled by adequate treatment.
5. Known HIV, active hepatitis B (HBV), or hepatitis C virus (HCV) infection.
6. Women who are pregnant (positive urine/blood pregnancy test) or lactating.

Trial design

Primary purpose: Treatment

Allocation: N/A

Interventional model: Single Group Assignment

Masking: None (Open label)

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12 participants in 1 patient group

Experimental: CD1a-CAR T

Experimental group

Description:

CD1a CAR T cells transduced with a lentiviral vector to express CD1a chimeric receptor domain on T cells administered with a dose-escalation approach.

Treatment:

Biological: CD1a-CAR T