Induction of Fetal Hemoglobin by Introducing Natural Hereditary Persistence of Fetal Hemoglobin Mutations in the γ-Globin Gene Promoters for Genome Editing Therapies for β-Thalassemia.

Induction of Fetal Hemoglobin by Introducing Natural Hereditary Persistence of Fetal Hemoglobin Mutations in the γ-Globin Gene Promoters for Genome Editing Therapies for β-Thalassemia.
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通过在γ-珠蛋白基因启动子中引入胎儿血红蛋白突变的自然遗传持久性来诱导胎儿血红蛋白,用于β-地中海贫血的基因组编辑疗法

DOI:
10.3389/fgene.2022.881937
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发表时间:
2022
影响因子:
3.7
通讯作者:
--
中科院分区:
生物学3区
文献类型:
--
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γ-珠蛋白表达的再激活是β-血红蛋白病的一种有前途的治疗方法。在这里,我们提出了一种新的Cas9/AAV 6介导的基因组编辑策略用于治疗β-地中海贫血:天然HPFH突变− 113 A> G,− 114 C> T,− 117 G>A,− 175 T> C,− 195 C> G和− 198 T> C是在HBG 1/HBG 2启动子中的BCL 11 A结合位点破坏后通过同源重组引入的。在HUDEP-2细胞和来自重型β地中海贫血患者的原代HSPC中观察到红系分化期间精确的靶向编辑和显著增加的γ-珠蛋白表达。此外,经编辑的HSPC在B-NDG hTHPO小鼠中保持了长期造血重建的能力。这项研究提供了引入天然HPFH突变作为β-地中海贫血遗传疗法的有效性的证据。
Reactivation of γ-globin expression is a promising therapeutic approach for β-hemoglobinopathies. Here, we propose a novel Cas9/AAV6-mediated genome editing strategy for the treatment of β-thalassemia: Natural HPFH mutations −113A > G, −114C > T, −117G>A, −175T > C, −195C > G, and −198T > C were introduced by homologous recombination following disruption of BCL11A binding sites in HBG1/HBG2 promoters. Precise on-target editing and significantly increased γ-globin expression during erythroid differentiation were observed in both HUDEP-2 cells and primary HSPCs from β-thalassemia major patients. Moreover, edited HSPCs maintained the capacity for long-term hematopoietic reconstitution in B-NDG hTHPO mice. This study provides evidence of the effectiveness of introducing naturally occurring HPFH mutations as a genetic therapy for β-thalassemia.
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