Abstract:β-thalassemia pathology is not only due to loss of β-globin (HBB), but also erythrotoxic accumulation and aggregation of the β-globin binding partner, α-globin (HBA1/2). Here we describe a Cas9/AAV6-mediated genome editing strategy that can replace the entire HBA1 gene with a full-length HBB transgene in β-thalassemia-derived hematopoietic stem and progenitor cells (HSPCs), which is sufficient to normalize β-globin:α-globin mRNA and protein ratios and restore functional adult hemoglobin tetramers in patient-de… Show more
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