CAR T-cell Therapy Targeting CD19 and BCMA in Patients with AIHA Who Have Failed ≥3 Lines of Therapy.

Inclusion Criteria

• •Age ≥ 18 years
• •Flow cytometry detected positive B cell CD19 or BCMA in the patient's peripheral blood.
• •Patients diagnosed with AIHA, including warm antibody type, cold agglutinin disease, mixed type, and other types of AIHA, with diagnostic criteria referring to the "Chinese Adult Autoimmune Hemolytic Anemia Diagnosis and Treatment Guidelines (2023 Edition)"
• •The definition of recurrent/refractory AIHA that has received at least 3 failed lines of treatment is symptomatic anemia (hemoglobin\<100g/L) that persists after a routine treatment cycle of at least 6 months and is still ineffective or reappears after disease remission. The definition of conventional treatment: treatment with glucocorticoids and/or rituximab, as well as any 1-2 or more of the following immunomodulatory drugs: cyclophosphamide, azathioprine, mycophenolate mofetil, cyclosporine A, azathioprine, danazol, bendamustine, fludarabine, bortezomib, and biologics including daratumumab, BTK inhibitors, Syk inhibitors, and complement inhibitors.
• •ECOG ≤ 2
• •Functional requirements for major organs are as follows:
• •1. . The bone marrow function needs to meet: a Neutrophil count ≥ 1.0 × 10 \^ 9/L; b. Platelets ≥ 30 × 10 \^ 9/L.
• •2. Liver function: ALT ≤ 3 × UL; AST ≤ 3×ULN； Total bilirubin ≤ 2.0 × ULN (excluding Gilbert syndrome, total bilirubin ≤ 3.0 × ULN).
• •3. Renal function: creatinine clearance rate (CrCl) ≥ 30 ml/min (Cockcroft/Gault formula, excluding acute CrCl decline caused by the disease itself).
• •Female subjects of childbearing potential and male subjects with partners of childbearing potential must use medically approved contraception or abstinence during the study treatment period and for at least 6 months after the end of the study treatment; Female subjects of childbearing potential must have a negative Human chorionic gonadotropin (HCG) test within 7 days before study enrollment and not be lactating.
• •Willing to participate in this clinical study, sign an informed consent form, have good compliance, and cooperate with follow-up.