ATC Group: B06AX Other hematological agents

Betibeglogene autotemcel adds functional copies of a modified β-globin gene into the patients' HSCs through transduction of autologous CD34+ cells with BB305 LVV, thereby addressing the underlying genetic cause of the disease. After betibeglogene autotemcel infusion, transduced CD34+ HSCs engraft in the bone marrow and differentiate to produce RBCs containing biologically active β^A-T87Q-globin (a modified β-globin protein) that will combine with α-globin to produce functional Hb containing β^A-T87Q-globin (HbA^T87Q).

Crizanlizumab-tmca is a humanized IgG2 kappa monoclonal antibody that binds to P-selectin and blocks interactions with its ligands including P-selectin glycoprotein ligand 1.

Exagamglogene autotemcel is a cell therapy consisting of autologous CD34+ HSPCs ex vivo edited by CRISPR/Cas9-technology. The highly specific guide RNA enables CRISPR/Cas9 to make a precise DNA double-strand break at the critical transcription factor binding site (GATA1) in the erythroid specific enhancer region of the BCL11A gene. As a result of the editing, GATA1 binding is irreversibly disrupted and BCL11A expression reduced. Reduced BCL11A expression results in an increase in γ-globin expression and foetal haemoglobin (HbF) protein production in erythroid cells, addressing the absent globin in transfusion-dependent β-thalassemia (TDT) and the aberrant globin in sickle cell disease (SCD), which are the underlying causes of disease.