Novel Allogenic CD19-targeting CAR-γδT Cell Therapy (QH103E) in r/r NHL

NCT06838832 | Recruiting Phase 1 DMC

• 1 other identifier: CHN-PLAGH-BT-091
• Study Type: interventional
• Target: 30
• Locations: 1 country
• Sites: 1

Brief Summary

CD19-CAR-γδT cell therapy is a cellular immunotherapy targeting CD19 to perform CAR modification on allogeneic γδT cells. A novel version of the CAR-γδT product by gene editing (QH103E) that has been validated for resistance to alloreactive T cell killing and enhancement of memory efficacy will be used in this study. This is a single center, prospective, open-label, single-arm, phase 1/2 study. A total of around 30 patients with relapsed or refractory (r/r) B-cell non-Hodgkin's lymphoma (NHL) will be enrolled in the study and receive QH103E product infusion. Phase 1 (n=9 to 12) is dose escalation part, and phase 2 (n=15 to 20) is expansion cohort part. The primary objective of this study was to evaluate the safety and efficacy of QH103E in patients with r/r B-cell NHL.

Conditions

Non-hodgkin Lymphoma,B Cell

Keywords

B-cell malignancies; Relapsed or refractory; allogeneic CD19-CAR-γδT; gene editing

Outcome Measures

Primary Outcomes (4)

• Phase 1: Incidence of Adverse Events (AEs)

  AE is defined as any adverse medical event from the date of lymphodepletion to 12 months after QH103E infusion. Among them, cytokine release syndrome (CRS) and immune cell-associated neurotoxicity syndrome (ICANS) were graded according to American Society for Transplantation and Cellular Therapy (ASTCT) criteria, graft-versus-host disease (GVHD) according to criteria defined by the Mount Sinai Acute GVHD International Consortium. Other AEs were graded according to common terminology criteria for adverse events (CTCAE) v5.0.

  12 months

• Phase 1: Incidence of Dose-Limiting Toxicities (DLTs)

  DLT was defined as QH103E-related events with onset within first 28 days following infusion: * Grade 3 aGVHD that does not resolve to Grade 1 or 2 within 7 days, with the exception of isolated skin involvement aGVHD; * Grade 4 CRS, or grade 3 CRS that does not resolve to grade 2 or lower within 2 weeks; * Grade 3 ICANS lasting for ≥7 days or Grade 4 ICANS; * Any other Grade ≥4 and Grade 3 AE related to the QH103E that lasts for ≥14 days, except hematology toxicity.

  28 days

• Phase 1: Recommended phase 2 dose (RP2D)

  The recommended dose for phase 2 was determined through phase 1 study

  12 months

• Phase 2: Best objective Response Rate

  The incidence of complete response (CR), partial response (PR), stable disease (SD), progressive disease (PD), or unevaluable (UE) as the best response to treatment assessed by investigators and based on the Lugano 2014 assessment criterion.

  12 months

Secondary Outcomes (5)

• Phase 2: Overall Survival (OS)

  12 months after the first infusion of QH103E infusion

• Phase 2: Progression Free Survival (PFS)

  12 months after the first infusion of QH103E infusion

• Phase 2: Duration of Response (DOR)

  12 months after the first infusion of QH103E infusion

• Pharmacokinetics: Number and copy number of QH103E (phase 1 and phase 2)

  12 months

• Pharmacodynamics: Peak level of cytokines in serum (phase 1 and phase 2)

  Up to 28 days after infusion

Study Arms (1)

Patients with refractory or relapsed B-cell NHL

EXPERIMENTAL

A conditioning chemotherapy regimen of fludarabine and cyclophosphamide will be administered followed by investigational treatment, QH103E product.

Biological: Allogenic CD19-CAR-γδT cell; Drug: Fludarabine; Drug: Cyclophosphamide

Interventions

Allogenic CD19-CAR-γδT cell BIOLOGICAL

Phase 1 dose escalation (3+3) : dose 1 (1 × 10\^6 cells/kg) , dose 2 (3 × 10\^6 cells/kg), dose 3 (6× 10\^6 cells/kg); Phase 2 : dose of RP2D.

Patients with refractory or relapsed B-cell NHL

Fludarabine DRUG

Intravenous fludarabine 30\~50 mg/m\^2/day on days -5, -4, and -3.

Also known as: Fludarabine Phosphate for Injection

Patients with refractory or relapsed B-cell NHL

Cyclophosphamide DRUG

Intravenous cyclophosphamide 500\~1000 mg/m\^2/ day on days -5, -4, and -3.

Also known as: Cyclophosphamide for Injection

Patients with refractory or relapsed B-cell NHL

Eligibility Criteria

• Age: 18 Years - 75 Years
• Sex: all
• Healthy Volunteers: No
• Age Groups: Adult (18-64), Older Adult (65+)

You may qualify if:

• Age 18-75 (inclusive).
• Patients with histologically confirmed CD19-positive B-cell NHL.
• Relapse after treatment with ≥2 lines systemic therapy for all the B-cell NHL disease types, or refractory disease for aggressive types (DLBCL-NOS, PMBCL, TFL and HGBCL). Relapse disease is defined as disease progression after last regimen. Refractory disease is defined as no CR to first-line therapy:
• PD as best response to first-line therapy, or
• SD as best response after at least 4 cycles of first-line therapy (eg,4 cycles of R-CHOP), or
• PR as best response after at least 6 cycles and biopsy-proven residual disease or disease progression ≤ 6 months of therapy. or refractory post-autologous stem cell transplant (ASCT): i. Disease progression or relapsed less than or equal to 12 months of ASCT (must have biopsy proven recurrence in relapsed individuals); ii. If salvage therapy is given post-ASCT, the individual must have had no response to or relapsed after the last line of therapy.
• The estimated survival time is over 3 months.
• The Eastern Cooperative Oncology Group (ECOG) score is 0-2.
• According to Lugano response criteria 2014, there should be at least one evaluable tumor focus. Evaluable tumor focus was defined as that with the longest diameter of intranodal focus \> 1.5cm, the longest diameter of extranodal focus \> 1.0cm assessed by computed tomography (CT) or magnetic resonance imaging (MRI).
• Subjects must be willing to undergo either excised or large-needle lymph node or tissue biopsy, or provide formalin-fixed paraffin-embedded (FFPE) tumor tissue block or freshly cut unstained slides.
• Functions of important organs meet the following requirements:
• Echocardiography showed left ventricular ejection fraction ≥50%. Serum creatinine ≤1.5 × upper limit of normal range (ULN) or endogenous creatinine clearance ≥45mL/min (cockcroft-gault formula); Alanine aminotransferase (ALT)/aspartate aminotransferase (AST) ≤3 times ULN, Total bilirubin ≤1.5× ULN; Pulmonary function: ≤CTCAE grade1 dyspnea and oxygen saturation of blood (SaO2) ≥91% in indoor air environment.
• Blood routine (normal values shall not be obtained with growth factors, and hemocytopenia caused by lymphoma invasion of bone marrow is not subject to conditions below): hemoglobin (Hgb) ≥80g/L, neutrophil count≥1×10\^9/L, platelet (PLT) ≥75×10\^9/L.
• Pregnancy tests for women of childbearing age shall be negative; Both men and women agreed to use effective contraception during treatment and during the subsequent 1 year.

You may not qualify if:

• No obvious hereditary diseases.
• Able to understand the requirements and matters of the trial, and willing to participate in clinical research as required.
• Informed consent must be signed.
• During the screening period, there was central nervous system (CNS) invasion or a history of clinically significant central nervous system diseases, such as epilepsy and cerebrovascular diseases.
• Women who are pregnant or breastfeeding, or who do not agree to use effective contraception during treatment and during the subsequent 1 year.
• History of allogeneic hematopoietic stem cell transplantation, or organ transplantation.
• History of other malignancies that have not been in remission.
• Patients with primary immunodeficiency or autoimmune diseases requiring immunosuppressive therapy.
• Received radiotherapy within 3 months before enrollment.
• Received immunotherapy drugs within 4 weeks before enrollment, such as anti-programmed death 1 (PD-1) antibody, anti-programmed death ligand 1 (PD-L1) antibody, CD19/CD3-bispecific antibody, and so on.
• Patients who received any immunocellular therapy within 6 months before enrollment.
• Confirmed evidence showing positiveness of anti-CD19 scFv reaction in patient serum.
• Patients who participated in other clinical trials within 4 weeks prior to enrollment.
• Uncontrolled infectious diseases or other serious illnesses, including but not limited to infections \[e.g., human immunodeficiency virus (HIV) infection or acute or chronic active hepatitis B (HBV) or C (HCV) infection\], congestive heart failure, unstable angina, arrhythmias, or that pose an unpredictable risk in the opinion of the attending physician.
• The presence of uncontrollable serous membrane fluid, such as massive pleural effusion or ascites.

Sponsors & Collaborators

• Chinese PLA General Hospital: lead

Study Sites (1)

Biotherapeutic Department of Chinsese PLA Gereral Hospital

Beijing, Beijing Municipality, 100853·, China

RECRUITING

MeSH Terms

Conditions

Recurrence

Interventions

fludarabine; fludarabine phosphate; Injections; Cyclophosphamide

Condition Hierarchy (Ancestors)

Disease Attributes; Pathologic Processes; Pathological Conditions, Signs and Symptoms

Intervention Hierarchy (Ancestors)

Drug Administration Routes; Drug Therapy; Therapeutics; Phosphoramide Mustards; Nitrogen Mustard Compounds; Mustard Compounds; Hydrocarbons, Halogenated; Hydrocarbons; Organic Chemicals; Phosphoramides; Organophosphorus Compounds

Central Study Contacts

Weidong Han

CONTACT

+86-010-55499341; hanwdrsw@sina.com

Study Design

• Study Type: interventional
• Phase: phase 1
• Allocation: NA
• Masking: NONE
• Purpose: TREATMENT
• Intervention Model: SINGLE GROUP
• Sponsor Type: OTHER
• Responsible Party: PRINCIPAL INVESTIGATOR
• PI Title: Director of Biotherapeutic Department

Study Record Dates

• First Submitted: February 17, 2025
• First Posted: February 21, 2025
• Study Start: July 27, 2025
• Primary Completion (Estimated): March 1, 2027
• Study Completion (Estimated): March 1, 2028
• Last Updated: July 30, 2025

Record last verified: 2025-07

Data Sharing

• IPD Sharing: Will not share

Locations

CN (1)