Table 3.

Gene therapy trials for β-thalassemia

TherapyGene modification techniqueGenetic mechanismPhase of developmentAlso in development for sickle cell disease?Comments
Betibeglogene autotemcel (beti-cel; formerly BB305)8-11,17,18  Lentiviral vector Insertion of modified β-globin Phase 3 trials Yes Reopened after temporary halt due to AML cases in sickle cell patients 
GLOBE12  Lentiviral vector Insertion of human β-globin Phase 1/2 trial completed No Intrabone administration 
CTX00114,15  CRISPR-Cas9 Targets BCL11A enhancer → HbF induction Phase 1/2 trial Yes  
ST-40016  ZFN Targets BCL11A enhancer → HbF induction Phase 1/2 trial No  
TherapyGene modification techniqueGenetic mechanismPhase of developmentAlso in development for sickle cell disease?Comments
Betibeglogene autotemcel (beti-cel; formerly BB305)8-11,17,18  Lentiviral vector Insertion of modified β-globin Phase 3 trials Yes Reopened after temporary halt due to AML cases in sickle cell patients 
GLOBE12  Lentiviral vector Insertion of human β-globin Phase 1/2 trial completed No Intrabone administration 
CTX00114,15  CRISPR-Cas9 Targets BCL11A enhancer → HbF induction Phase 1/2 trial Yes  
ST-40016  ZFN Targets BCL11A enhancer → HbF induction Phase 1/2 trial No  

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