Increasing CRISPR Efficiency and Measuring Its Specificity in HSPCs Using a Clinically Relevant System
Genome editing of human cluster of differentiation 34+ (CD34+) hematopoietic stem and progenitor cells (HSPCs) holds great therapeutic potential. This study aimed to optimize on-target, ex vivo genome editing using the CRISPR-Cas9 system in CD34+ HSPCs and to create a clear workflow for precise iden...
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doaj-74189cca19364566b5cb4597df8b71152020-11-25T03:09:29ZengElsevierMolecular Therapy: Methods & Clinical Development2329-05012020-06-011710971107Increasing CRISPR Efficiency and Measuring Its Specificity in HSPCs Using a Clinically Relevant SystemJenny Shapiro0Ortal Iancu1Ashley M. Jacobi2Matthew S. McNeill3Rolf Turk4Garrett R. Rettig5Ido Amit6Adi Tovin-Recht7Zohar Yakhini8Mark A. Behlke9Ayal Hendel10Institute of Nanotechnology and Advanced Materials, The Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat-Gan 5290002, IsraelInstitute of Nanotechnology and Advanced Materials, The Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat-Gan 5290002, IsraelIntegrated DNA Technologies, Coralville, IA 52241, USAIntegrated DNA Technologies, Coralville, IA 52241, USAIntegrated DNA Technologies, Coralville, IA 52241, USAIntegrated DNA Technologies, Coralville, IA 52241, USADepartment of Computer Science, Interdisciplinary Center, Herzliya 4610101, IsraelInstitute of Nanotechnology and Advanced Materials, The Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat-Gan 5290002, IsraelDepartment of Computer Science, Interdisciplinary Center, Herzliya 4610101, Israel; Department of Computer Science, Technion–Israel Institute of Technology, Haifa 3200003, IsraelIntegrated DNA Technologies, Coralville, IA 52241, USAInstitute of Nanotechnology and Advanced Materials, The Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat-Gan 5290002, Israel; Corresponding author: Ayal Hendel, PhD, Bar-Ilan University, Ramat-Gan 5290002, Israel.Genome editing of human cluster of differentiation 34+ (CD34+) hematopoietic stem and progenitor cells (HSPCs) holds great therapeutic potential. This study aimed to optimize on-target, ex vivo genome editing using the CRISPR-Cas9 system in CD34+ HSPCs and to create a clear workflow for precise identification of off-target effects. Modified synthetic guide RNAs (gRNAs), either 2-part gRNA or single-guide RNA (sgRNA), were delivered to CD34+ HSPCs as part of ribonucleoprotein (RNP) complexes, targeting therapeutically relevant genes. The addition of an Alt-R electroporation enhancer (EE), a short, single-stranded oligodeoxynucleotide (ssODN), significantly increased editing efficiency in CD34+ HSPCs. Notably, similar editing improvement was observed when excess gRNA over Cas9 protein was used, providing a DNA-free alternative suitable for therapeutic applications. Furthermore, we demonstrated that sgRNA may be preferable over 2-part gRNA in a locus-specific manner. Finally, we present a clear experimental framework suitable for the unbiased identification of bona fide off-target sites by Genome-Wide, Unbiased Identification of Double-Strand Breaks (DSBs) Enabled by Sequencing (GUIDE-seq), as well as subsequent editing quantification in CD34+ HSPCs using rhAmpSeq. These findings may facilitate the implementation of genome editing in CD34+ HSPCs for research and therapy and can be adapted for other hematopoietic cells.http://www.sciencedirect.com/science/article/pii/S2329050120300875genome editingCRISPR-Cas9CD34+ hematopoietic stem and progenitor cellschemically modified guide RNAsoff-target sites |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Jenny Shapiro Ortal Iancu Ashley M. Jacobi Matthew S. McNeill Rolf Turk Garrett R. Rettig Ido Amit Adi Tovin-Recht Zohar Yakhini Mark A. Behlke Ayal Hendel |
spellingShingle |
Jenny Shapiro Ortal Iancu Ashley M. Jacobi Matthew S. McNeill Rolf Turk Garrett R. Rettig Ido Amit Adi Tovin-Recht Zohar Yakhini Mark A. Behlke Ayal Hendel Increasing CRISPR Efficiency and Measuring Its Specificity in HSPCs Using a Clinically Relevant System Molecular Therapy: Methods & Clinical Development genome editing CRISPR-Cas9 CD34+ hematopoietic stem and progenitor cells chemically modified guide RNAs off-target sites |
author_facet |
Jenny Shapiro Ortal Iancu Ashley M. Jacobi Matthew S. McNeill Rolf Turk Garrett R. Rettig Ido Amit Adi Tovin-Recht Zohar Yakhini Mark A. Behlke Ayal Hendel |
author_sort |
Jenny Shapiro |
title |
Increasing CRISPR Efficiency and Measuring Its Specificity in HSPCs Using a Clinically Relevant System |
title_short |
Increasing CRISPR Efficiency and Measuring Its Specificity in HSPCs Using a Clinically Relevant System |
title_full |
Increasing CRISPR Efficiency and Measuring Its Specificity in HSPCs Using a Clinically Relevant System |
title_fullStr |
Increasing CRISPR Efficiency and Measuring Its Specificity in HSPCs Using a Clinically Relevant System |
title_full_unstemmed |
Increasing CRISPR Efficiency and Measuring Its Specificity in HSPCs Using a Clinically Relevant System |
title_sort |
increasing crispr efficiency and measuring its specificity in hspcs using a clinically relevant system |
publisher |
Elsevier |
series |
Molecular Therapy: Methods & Clinical Development |
issn |
2329-0501 |
publishDate |
2020-06-01 |
description |
Genome editing of human cluster of differentiation 34+ (CD34+) hematopoietic stem and progenitor cells (HSPCs) holds great therapeutic potential. This study aimed to optimize on-target, ex vivo genome editing using the CRISPR-Cas9 system in CD34+ HSPCs and to create a clear workflow for precise identification of off-target effects. Modified synthetic guide RNAs (gRNAs), either 2-part gRNA or single-guide RNA (sgRNA), were delivered to CD34+ HSPCs as part of ribonucleoprotein (RNP) complexes, targeting therapeutically relevant genes. The addition of an Alt-R electroporation enhancer (EE), a short, single-stranded oligodeoxynucleotide (ssODN), significantly increased editing efficiency in CD34+ HSPCs. Notably, similar editing improvement was observed when excess gRNA over Cas9 protein was used, providing a DNA-free alternative suitable for therapeutic applications. Furthermore, we demonstrated that sgRNA may be preferable over 2-part gRNA in a locus-specific manner. Finally, we present a clear experimental framework suitable for the unbiased identification of bona fide off-target sites by Genome-Wide, Unbiased Identification of Double-Strand Breaks (DSBs) Enabled by Sequencing (GUIDE-seq), as well as subsequent editing quantification in CD34+ HSPCs using rhAmpSeq. These findings may facilitate the implementation of genome editing in CD34+ HSPCs for research and therapy and can be adapted for other hematopoietic cells. |
topic |
genome editing CRISPR-Cas9 CD34+ hematopoietic stem and progenitor cells chemically modified guide RNAs off-target sites |
url |
http://www.sciencedirect.com/science/article/pii/S2329050120300875 |
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