HY001N for Patients With Autoimmune Hemolytic Anemia After Failure ≥3 Lines of Therapy.

This study will be conducted in Chinese hospitals and to include 9 to 12 subjects with refractory/relapsed autoimmune hemolytic anemia.

The main purpose of the study is to evaluate the safety and tolerability of HY001N Cell Injection in the treatment of autoimmune hemolytic anemia that has failed at least three lines of treatment, and determine the recommended phase II dose (RP2D) of HY001N Cell Injection in subjects with autoimmune hemolytic anemia who have failed at least three lines of treatment.

The Secondary purpose of the study is to evaluate the efficacy of HY001N Cell Injection in the treatment of autoimmune hemolytic anemia that has failed at least three lines of treatment and to evaluate the pharmacokinetic (PK) characteristics, pharmacodynamic (PD) characteristics and immunogenicity in the treated patients.

Inclusion criteria

• Participant and/or participant's legal representative fully understand and voluntarily sign informed consent forms;
• Aged 18 to 75 years, regardless of gender;
• Participants with autoimmune hemolytic anemia or Evans syndrome after Failure ≥3 lines of therapy. The Failure of ≥3 lines of therapy meet all the following conditions: Hemoglobin less than 10g/dL and symptoms of anemia;

For participants diagnosed warm AIHA, or mixed AIHA, or Evans syndrome:

Failure of first-line corticosteroid therapy; Failure of second-line rituximab therapy; Failure of any one or more of the third-line treatments (splenectomy, cyclosporine, cyclophosphamide, azathioprine, mycophenolate mofetil, fludarabine, bortezomib, etc.)

For participants diagnosed cold AIHA (cold agglutinin disease):

Failure of first-line rituximab therapy; Failure of second-line rituximab ± Bendamostine/fludalabine; Failure of third-line therapy (bortezomib, Sutimlimab, Pegcetacoplan, Eculizumab, etc.)

• Women of childbearing age must have a negative blood pregnancy test within 7 days prior to the initiation of conditioning. Any male or female subject of reproductive potential must agree to use effective contraception throughout the study period and for at least 2 year following the infusion of CAR T-cells. In the judgment of the investigator, a subject of reproductive potential refers to having the biological capacity to conceive or father a living child and being sexually active. Women who considered infertile (i.e., meeting at least one of the following criteria): Has undergone a hysterectomy or bilateral oophorectomy, or Medically confirmed ovarian failure, or is medically confirmed as postmenopausal (defined as at least 12 consecutive months of amenorrhea without pathological or physiological causes).
• Laboratory tests of adequate organ function: Serum alanine aminotransferase (ALT) and aspartate aminotransferase (AST) ≤3×ULN; Coagulation profile: INR ≤ 1.5×ULN and aPTT ≤ 1.5×ULN; Serum creatinine ≤1.5×ULN or CCr ≥ 60mL/min; and have a minimum level of pulmonary reserve defined as the blood oxygen saturation in a non-oxygenated state is > 91%.
• Eastern Cooperative Oncology Group (ECOG) performance status 0~2.

Exclusion criteria

• History of lymphoproliferative neoplasms
• Secondary AIHA caused by drugs or infection
• Pregnancy or lactation
• Previously received organ or hematopoietic stem cell transplantation
• History of new thrombotic event or organ infarction in the past 6 months
• Diagnosis of the active stage of connective tissue disease
• Had other inherited or acquired hemolytic diseases
• Have active infections, such as sepsis, bacteremia, fungemia, uncontrolled pulmonary infection and active tuberculosis, etc.
• Positive hepatitis B surface antigen (HBs-Ag) or hepatitis B e antigen (HBe-Ag); 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; EBV-DNA or CMV-DNA copy number is above the lower limit of the measurable capacity;
• Received major surgery within 4 weeks before screening that was assessed by the researcher as 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 (except atrial fibrillation, paroxysmal supraventricular tachycardia), d. QTcB interval

≥450ms for male and ≥470ms for female, e. have myocardial infarction, bypass surgery, or stent placement within the 6 months before the trial, f. other heart diseases judged by the researcher to be unsuitable for enrollment

• Have a history of live attenuated vaccines within 6 weeks before enrollment
• Participate in other experimental studies within 30 days prior to apheresis or within 5 half-lives of the trial drug, whichever is longer. (Note: Parallel enrollment in studies is allowed)
• Have a history of epilepsy or other active central nervous system diseases
• Active bleeding
• Have an allergy to the ingredients of the medicine used in this trial
• Previously received CAR T-cell therapy
• Participants considered to be ineligible for the study by the investigator for reasons other than the above.