Editing the core region in HPFH deletions alters fetal and adult globin expression for treatment of β-hemoglobinopathies
Autor: | Vigneshwaran Venkatesan, Abisha Crystal Christopher, Manuel Rhiel, Manoj Kumar K. Azhagiri, Prathibha Babu, Kaivalya Walavalkar, Bharath Saravanan, Geoffroy Andrieux, Sumathi Rangaraj, Saranya Srinivasan, Karthik V. Karuppusamy, Annlin Jacob, Abhirup Bagchi, Aswin Anand Pai, Yukio Nakamura, Ryo Kurita, Poonkuzhali Balasubramanian, Rekha Pai, Srujan Kumar Marepally, Kumarasamypet Murugesan Mohankumar, Shaji R. Velayudhan, Melanie Boerries, Dimple Notani, Toni Cathomen, Alok Srivastava, Saravanabhavan Thangavel |
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Jazyk: | angličtina |
Rok vydání: | 2023 |
Předmět: | |
Zdroj: | Molecular Therapy: Nucleic Acids, Vol 32, Iss , Pp 671-688 (2023) |
Druh dokumentu: | article |
ISSN: | 2162-2531 44468679 |
DOI: | 10.1016/j.omtn.2023.04.024 |
Popis: | 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 in vivo. Furthermore, PRR-βE1 gene editing is feasible without ex vivo 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. |
Databáze: | Directory of Open Access Journals |
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