KYSA-5: A Study of Anti-CD19 Chimeric Antigen Receptor T-Cell (CD19 CAR T) Therapy, in Subjects With Systemic Sclerosis

Key Inclusion Criteria 1. Clinical diagnosis of SSc according to 2013 ACR/EULAR classification 2. Clinical disease as follows: Classified as diffuse cutaneous SSc; ≤ 6 years since first non-Raynaud's sign or symptom; active disease 3. Up to date on all recommended vaccinations per CDC or institutional guidelines for immune-compromised individuals Key Exclusion Criteria 1. Clinically significant ILD 2. Prior treatment with cellular therapy (CAR-T) or gene therapy product directed at any target 3. History of allogeneic or autologous stem cell transplant 4. Evidence of active hepatitis B or hepatitis C infection 5. Positive serology for HIV 6. Primary immunodeficiency 7. History of splenectomy 8. History of stroke, seizure, dementia, Parkinson's disease, coordination movement disorder, cerebellar diseases, psychosis, paresis, aphasia, and any other neurologic disorder investigator considers would increase the risk for the subject 9. Impaired cardiac function or clinically significant cardiac disease 10. Previous or concurrent malignancy with the following exceptions: 1. Adequately treated basal cell or squamous cell carcinoma (adequate wound healing is required prior to screening) 2. In situ carcinoma of the cervix or breast, treated curatively and without evidence of recurrence for at least 3 years prior to screening 3. A primary malignancy which has been completely resected, or treated, and is in complete remission for at least 5 years prior to screening