A Study of YTS109 Cell in Subjects With Relapsed/Refractory Autoimmune Hemolytic Anemia

Inclusion Criteria: * Age ≥18 years, regardless of gender. * A definitive diagnosis of Autoimmune Hemolytic Anemia (AIHA) or Evans Syndrome \[including warm antibody-type, mixed warm-cold antibody-type, and cold antibody-type hemolytic anemia (cold agglutinin disease)\] has been established, with diagnostic criteria referenced from the Chinese Clinical Practice Guidelines for the Diagnosis and Treatment of Autoimmune Hemolytic Anemia in Adults (2023 Edition). * Patients who have undergone at least three failed treatment attempts, whose anemia symptoms (hemoglobin \< 100 g/L) persist despite conventional therapy, and who remain unresponsive or experience recurrence after disease remission. Definition of Conventional Therapy: Treatment with glucocorticoids and/or rituximab, combined with any one or more of the following interventions: splenectomy, cyclosporine, cyclophosphamide, azathioprine, mycophenolate mofetil, bendamustine, fludarabine, bortezomib, or other pharmacological agents, as well as biologic agents including anti-CD38 monoclonal antibodies, BTK inhibitors, Syk inhibitors, complement inhibitors, etc. * Adequate Organ Function: 1. Liver Function: Serum alanine aminotransferase (ALT) and aspartate aminotransferase (AST) ≤ 3 × upper limit of normal (ULN); Total bilirubin ≤ 2.0 × ULN (excluding Gilbert syndrome, where total bilirubin ≤ 3.0 × ULN). 2. Renal Function: Creatinine clearance (CrCl) ≥ 60 ml/minute (calculated using the Cockcroft-Gault formula). 3. Oxygen Saturation (SpO₂): ≥ 92%. 4. Bone Marrow Function Requirements: 1. Absolute neutrophil count (ANC) ≥ 1.0 × 10⁹/L; 2. Platelet count ≥ 30 × 10⁹/L; 3. International normalized ratio (INR) ≤ 1.5 × ULN; 4. Activated partial thromboplastin time (APTT) ≤ 1.5 × ULN. * ECOG performance status≤2. * Subjects of childbearing potential will be required to follow contraception requirements from the time of enrollment until the end of the 12-month safety follow-up period. * The subjects voluntarily participate in the study, sign the informed consent, demonstrate good compliance, and cooperate with follow-up. Exclusion Criteria: * • Diagnosis of lymphoproliferative tumor * Other hereditary or acquired hemolytic diseases (Secondary AIHA caused by drugs or infection) * The platelet count in peripheral blood\<30×10\^9/L * Pregnant or breast-feeding subjects * Receive any of the following treatments within the specified time before cell infusion: a.anti-CD20 monoclonal antibodies \<12 weeks, b.sutimlimab or other marketed biologics \<5 half-lives,c.plasma exchange \<4 weeks, d.post-splenectomy \<12 weeks, e. BTK inhibitors, anti-CD38 monoclonal antibody, Syk inhibitors, BAFF inhibitors \< 5 half-lives. * Previously received organ or stem cell transplantation * History of new thrombosis or organ infarction in the past 6 months * Diagnosis of the active stage of the connective tissue disease. * Have active infections, such as sepsis, bacteremia, fungemia, uncontrolled pulmonary infection and active tuberculosis, etc. * Positive hepatitis B surface antigen (HBsAg) or hepatitis B e antigen (HBeAg); positive hepatitis B e antibody (HBe-Ab) or hepatitis B core antibody (HBc-Ab), and the HBV-DNA copy number is above the lower limit of the measurable capacity; positive hepatitis C (HCV) antibody; positive human immunodeficiency virus (HIV) antibody; positive syphilis test. * Underwent major surgery within 4 weeks before screening, as determined by the investigator to be unsuitable for enrollment. * Have malignant tumors within 5 years before enrollment, except tumors with negligible risk of metastasis or death and curable tumors, such as adequately treated cervical carcinoma in situ, cutaneous basal cell carcinoma, etc. * Have any of the following cardiovascular diseases: a.Left ventricular ejection fraction (LVEF) ≤45%, b. presence of active heart disease or congestive heart failure (New York Heart Association \[NYHA\] Class III or IV)), c.severe arrhythmias requiring treatment, d.have myocardial infarction, bypass surgery, or stent placement within the 6 months before the study, e.other heart diseases judged by the researcher to be unsuitable for enrollment. * Have a history of live attenuated vaccines within 6 weeks before enrollment. * Have a history of epilepsy or other active central nervous system diseases. * Have an allergy to the ingredients of the medicine used in this study. * Previously received CAR-T cell therapy. * Patients considered to be ineligible for the study by the investigator for reasons other than the above.