
@article {129160,
	title = {Editing the core region in HPFH deletions alters fetal and adult globin expression for treatment of β-hemoglobinopathies.},
	journal = {Mol Ther Nucleic Acids},
	volume = {32},
	year = {2023},
	month = {2023 Jun 13},
	pages = {671-688},
	abstract = {<p>Reactivation of fetal hemoglobin (HbF) is a commonly adapted strategy to ameliorate β-hemoglobinopathies. However, the continued production of defective adult hemoglobin (HbA) limits HbF tetramer production affecting the therapeutic benefits. Here, we evaluated deletional hereditary persistence of fetal hemoglobin (HPFH) mutations and identified an 11-kb sequence, encompassing putative repressor region (PRR) to β-globin exon-1 (βE1), as the core deletion that ablates HbA and exhibits superior HbF production compared with HPFH or other well-established targets. PRR-βE1-edited hematopoietic stem and progenitor cells (HSPCs) retained their genome integrity and their engraftment potential to repopulate for long-term hematopoiesis in immunocompromised mice producing HbF positive cells . Furthermore, PRR-βE1 gene editing is feasible without HSPC culture. Importantly, the editing induced therapeutically significant levels of HbF to reverse the phenotypes of both sickle cell disease and β-thalassemia major. These findings imply that PRR-βE1 gene editing of patient HSPCs could lead to improved therapeutic outcomes for β-hemoglobinopathy gene therapy.</p>
},
	issn = {2162-2531},
	doi = {10.1016/j.omtn.2023.04.024},
	author = {Venkatesan, Vigneshwaran and Christopher, Abisha Crystal and Rhiel, Manuel and Azhagiri, Manoj Kumar K and Babu, Prathibha and Walavalkar, Kaivalya and Saravanan, Bharath and Andrieux, Geoffroy and Rangaraj, Sumathi and Srinivasan, Saranya and Karuppusamy, Karthik V and Jacob, Annlin and Bagchi, Abhirup and Pai, Aswin Anand and Nakamura, Yukio and Kurita, Ryo and Balasubramanian, Poonkuzhali and Pai, Rekha and Marepally, Srujan Kumar and Mohankumar, Kumarasamypet Murugesan and Velayudhan, Shaji R and Boerries, Melanie and Notani, Dimple and Cathomen, Toni and Srivastava, Alok and Thangavel, Saravanabhavan}
}
