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RECRUITING

NCT07148791

PHASE2

Exploratory Study of Anti-BCMA-CD19 CAR-T Cell Therapy in Relapsed or Refractory IgG4-Related Disease

Sponsor: Chinese PLA General Hospital

View on ClinicalTrials.gov

Summary

The goal of this clinical trial is to test the safety and potential benefit of a new immune cell therapy called anti-BCMA-CD19 CAR-T cells in adults (18-75 years) with IgG4-related disease (IgG4-RD) that has come back or not improved after standard treatments such as glucocorticoids or rituximab. The main questions this study aims to answer are: * What medical problems (side effects) occur after receiving anti-BCMA-CD19 CAR-T cell therapy? * Does anti-BCMA-CD19 CAR-T cell therapy improve IgG4-RD disease activity scores at 12 weeks and 26 weeks? Participants will: * Have their own blood immune cells collected by a procedure called leukapheresis * Receive short-term chemotherapy to prepare the immune system * Receive one intravenous infusion of anti-BCMA-CD19 CAR-T cells * Return for regular clinic visits over 26 weeks for safety checks, blood tests, and imaging * May be followed for up to one year in total

Official title: Exploratory Clinical Study of Anti-BCMA-CD19 CAR-T Cell Therapy for Relapsed/Refractory IgG4-Related Disease

Key Details

Gender

All

Age Range

18 Years - 75 Years

Study Type

INTERVENTIONAL

Enrollment

Start Date

2025-09-05

Completion Date

2029-12-31

Last Updated

2025-09-03

Healthy Volunteers

Conditions

Interventions

BIOLOGICAL

Anti-BCMA-CD19 CAR-T cells

Anti-BCMA-CD19 CAR-T cell injection is an autologous, dual-target chimeric antigen receptor T-cell therapy designed to target CD19 and BCMA antigens. Peripheral blood mononuclear cells (PBMCs) are collected from each participant and modified ex vivo using lentiviral transduction to express the CAR construct. Lymphodepletion with cyclophosphamide (250 mg/m\^2/day, IV) and fludarabine (30 mg/m\^2/day, IV) is administered for 3 days (Day -5 to Day -3). The doses of fludarabine and cyclophosphamide may be adjusted based on the patient's clinical condition. CAR-T cells are infused intravenously on Day 0 at one of three dose levels (1x10\^6, 2x10\^6, or 3x10\^6 CAR+ T cells/kg, ±20%). This product is being investigated in patients with relapsed or refractory IgG4-related disease (IgG4-RD) to assess safety and preliminary efficacy.

Inclusion Criteria: To participate, subjects must meet all of the following criteria: 1. Aged 18 to 75 years, inclusive, regardless of sex. 2. Meet the 2019 ACR/EULAR classification criteria for IgG4-related disease. 3. Involvement of two or more important systems/sites (including but not limited to the pancreas, bile ducts, kidneys and dura mater). 4. Relapsed or refractory IgG4-RD: The disease either remains active after 3 months of glucocorticoid and/or rituximab therapy or relapses within 6 months post-treatment. 5. Important organ function meeting the following conditions: * Bone marrow: (i) neutrophil count ≥1×10\^9/L (excluding disease-related neutropenia); (ii) hemoglobin ≥60 g/L. * Hepatic function: ALT≤3×ULN (elevation caused by disease may be excluded); AST≤3×ULN (elevation caused by disease may be excluded); TBIL≤1.5×ULN (elevation caused by disease may be excluded). * Renal function: creatinine clearance (Cockcroft-Gault formula) ≥30 ml/min (excluding acute decline due to disease). * Coagulation: international normalized ratio (INR) ≤ 1.5×ULN, prothrombin time (PT) ≤ 1.5×ULN * Cardiac function: stable hemodynamics. 6. Women of childbearing potential and male subjects with partners of childbearing potential must use medically accepted contraception or abstain during study treatment and for at least 12 months after the end of treatment. Women of childbearing potential must have a negative serum HCG test within 7 days before enrollment and must not be breastfeeding. 7. Voluntary participation in this clinical study with signed informed consent and willingness to comply with study procedures and follow-up. 8. Patent superficial peripheral veins adequate for intravenous infusion. Exclusion Criteria: Subjects will be excluded if any of the following criteria are met: 1. History of severe drug allergy or allergic constitution. 2. Current or suspected uncontrollable or treatment-requiring fungal, bacterial, viral or other infections. 3. Central nervous system disease (excluding disease-related epilepsy, psychosis, organic brain syndrome, cerebrovascular accident, encephalitis or central nervous system vasculitis). 4. Cardiac insufficiency that precludes participation. 5. Congenital immunoglobulin deficiency. 6. Congenital malformation or nutritional disorder causing severe organ impairment. 7. History of malignancy within the past five years. 8. End-stage renal failure. 9. Positive hepatitis B surface antigen and hepatitis B core antibody with HBV-DNA titers above the assay limit of detection; positive hepatitis C antibody with HCV-RNA positivity; positive human immunodeficiency virus antibody; positive syphilis serology. 10. Psychiatric disorders or severe cognitive impairment. 11. Participation in other clinical trials within three months before enrollment. 12. Receipt of any investigational drug within 12 weeks before screening or within five half-lives of the agent (whichever is longer). 13. Pregnant or intending to become pregnant. 14. Any other reason deemed by the investigator to preclude enrollment.

Locations (1)

Department of Rheumatology and Immunology, the First Medical Center, Chinese PLA General Hospital

Beijing, Beijing Municipality, China