Autologous CD19 Car T-Cell Therapy For Severe Refractory Systemic Lupus Erythematosus (SLE)

Inclusion Criteria: \- Aged between ≥ 18 to ≤ 65 years Clinical Diagnosis of SLE according to the 2019 European League Against Rheumatism/American College of Rheumatology (EULAR/ACR) classification criteria (Fanouriakis et al., 2019) Positive anti-nuclear antibody (ANA) (titer ≥1:80 ), anti-dsDNA (≥30 IU/mL on enzyme-linked immunosorbent assay \[ELISA\]), or anti-Smith at screening or by documented medical history Active disease (defined by not being in remission according to DORIS criteria or in a low disease activity state \[LLDAS\]) (Franklyn et al., 2016, van Vollenhoven et al., 2021) With at least one active organ system involvement Persistent active disease with insufficient response to glucocorticoids and at least 2 of the following treatments for at least 3 months each: cyclophosphamide, mycophenolate mofetil or its derivatives, belimumab, azathioprine, anifrolumab, methotrexate, rituximab, obinutuzumab, cyclosporin, tacrolimus or voclosporin. Serum ALT \<5 times the normal value, serum bilirubin \<3 times the normal value, Left ventricular ejection fraction \>45% Life expectancy of more than 3 months Eastern Cooperative Oncology Group (ECOG) performance status ≤2. Psychological, sociological or geographical conditions precluding compliance A female of childbearing age must have a negative pregnancy test and is on two effective contraception methods A male must use two effective contraception methods Exclusion Criteria: \- Active cancer or receiving cancer treatment Evidence of severe lung, FVC \<45% and/or DLCO (corrected for Hb) \<30% predicted, heart (NYHA class III/IV, arrhythmia, AV block, uncontrolled hypertension), liver failure or severe neurologic disorders. Pre-existing irreversible kidney damage and creatinine clearance below 30 ml/min ( to review) Severe pancytopenia HIV positivity. Active Hepatitis B, C infection. Septicemia. Pregnant/nursing female. Receiving stem cell transplant within 12 weeks of enrolment, chemotherapy or radiotherapy within 8 weeks of enrolment Active CNS involvement.