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Therapeutically relevant engraftment of a CRISPR-Cas9-edited HSC-enriched population with HbF reactivation in nonhuman primates.

Abstract：

:Reactivation of fetal hemoglobin (HbF) is being pursued as a treatment strategy for hemoglobinopathies. Here, we evaluated the therapeutic potential of hematopoietic stem and progenitor cells (HSPCs) edited with the CRISPR-Cas9 nuclease platform to recapitulate naturally occurring mutations identified in individuals who express increased amounts of HbF, a condition known as hereditary persistence of HbF. CRISPR-Cas9 treatment and transplantation of HSPCs purified on the basis of surface expression of the CD34 receptor in a nonhuman primate (NHP) autologous transplantation model resulted in up to 30% engraftment of gene-edited cells for >1 year. Edited cells effectively and stably reactivated HbF, as evidenced by up to 18% HbF-expressing erythrocytes in peripheral blood. Similar results were obtained by editing highly enriched stem cells, defined by the markers CD34+CD90+CD45RA-, allowing for a 10-fold reduction in the number of transplanted target cells, thus considerably reducing the need for editing reagents. The frequency of engrafted, gene-edited cells persisting in vivo using this approach may be sufficient to ameliorate the phenotype for a number of genetic diseases.

journal_name

Sci Transl Med

journal_title

Science translational medicine

authors

Humbert O,Radtke S,Samuelson C,Carrillo RR,Perez AM,Reddy SS,Lux C,Pattabhi S,Schefter LE,Negre O,Lee CM,Bao G,Adair JE,Peterson CW,Rawlings DJ,Scharenberg AM,Kiem HP

doi

10.1126/scitranslmed.aaw3768

subject

Has Abstract

pub_date

2019-07-31 00:00:00

issue

503

eissn

1946-6234

issn

1946-6242

pii

11/503/eaaw3768

journal_volume

11

pub_type

杂志文章

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