This is an open label study to evaluate the safety and efficacy of β-globin Restored Autologous Hematopoietic Stem Cells in ß-Thalassemia Major Patients

We will recruit ß-thalassaemia major patients and collect their autologous hematopoietic stem cells, which will be modified with the LentiHBBT87Q system to restore β-globin expression. After conditioning, the autologous hematopoietic stem cells with restored β-globin will be reinfused to the patients and followed up for two years to collect data.

Inclusion Criteria:

• 8-16 years old. Subject and/or subject's legal guardian fully understand and voluntarily sign informed consent;
• Clinically diagnosed as transfusion-dependent β-thalassemia major;
• With sufficient RBC infusion, subjects must maintain hemoglobin ≥9g/dL, serum ferritin threshold ≤ 3000 ng/mL and the liver iron overload mild or absent for at least 3 months before mobilization of hematopoietic stem cell;
• Follow the arrangements for treatment and regular medical checks within two years post-transplantation

Exclusion Criteria:

• The physical condition does not meet the requirements for hematopoietic stem cell mobilization and transplantation myeloablation;
• Received gene therapy and allogeneic HSCT in the past.
• Have an available HLA matched donor.
• Enrolling in another clinical trial.
• Other unsuitable conditions identified by doctors.