A Technique for Gene Editing in Natural Killer Cells Using CRISPR Cas9
Published: May 31, 2024
Abstract
Source: Naeimi Kararoudi, M., et al. Generation of Knock-out Primary and Expanded Human NK Cells Using Cas9 Ribonucleoproteins. J. Vis. Exp. (2018).
This video demonstrates a technique for Cas9 ribonucleoprotein-mediated genetic modification of primary natural killer (NK) cells. A Cas9 ribonucleoprotein, consisting of a Cas9 endonuclease bound to a guide RNA (gRNA) formed by base pairing a CRISPR RNA (crRNA) and a trans-activating crRNA (tracrRNA), is introduced into primary natural killer cells via electroporation. The ribonucleoprotein targets and cleaves the host DNA at the target site, leading to gene knockout via modification of the target gene through cellular repair machinery.
Protocol
All procedures involving sample collection have been performed in accordance with the institute's IRB guidelines. 1. Human NK Cell Purification and Expansion Isolate peripheral blood mononuclear cells (PBMCs) from Buffy Coat. Layer 35 mL of buffy coat sample on 15 mL of Ficoll-Paque. Centrifuge at 400 x g for 20 minutes without brake and collect the PBMC from the interface. Wash the recovered PBMCs three times by adding at leas…
Disclosures
The authors have nothing to disclose.
Materials
| RosetteSep™ Human NK Cell Enrichment Cocktail | STEMCELL Technologies | 15065 | The RosetteSep™ Human NK Cell Enrichment Cocktail is designed to isolate NK cells from whole blood by negative selection. |
| Ficoll-Paque® PLUS | GE Healthcare – Life Sciences | 17-1440-02 | |
| Alt-R® CRISPR-Cas9 tracrRNA | Integrated DNA Technologies | 1072532 | TracrRNA that contains proprietary chemical modifications conferring increased nuclease resistance. Hybridizes to crRNA to activate the Cas9 enzyme |
| Alt-R® CRISPR-Cas9 crRNA | Integrated DNA Technologies | Synthetically produced as Alt-R® CRISPR-Cas9 crRNA, based on the sequence of designed gRNA targeting the gene of intrest | |
| Alt-R® Genome Editing Detection Kit | Integrated DNA Technologies | 1075931 | Each kit contains T7EI endonuclease, T7EI reaction buffer, and T7EI assay controls. |
| Platinum® Taq DNA Polymerase High Fidelity | Invitrogen | 11304-011 | |
| 4D-Nucleofector™ System | Lonza | AAF-1002B | |
| Human recombinant IL-2 Protein | Novartis | 65483-0116-07 | |
| P3 Primary Cell 4D-Nucleofector™ X Kit | Lonza | V4XP-3032 | Contains pmaxGFP™ Vector, Nucleofector™ Solution, Supplement, 16-well Nucleocuvette™ Strips |
| Non-targeting: Custom siRNA, Standard 0.05 2mol ON-TARGETplus | Dharmacon | CTM-360019 | |
| Alt-R® S.p. Cas9 Nuclease 3NLS | Integrated DNA Technologies | 1074181 | Cas9 Nuclease |
| DNeasy® Blood & Tissue Handbook | Qiagen | 69504 | |
| RNeasy Mini Kit | Qiagen | 74104 | |
| Calcein AM | ThermoFisher | C3099 | |
| TGFβ | Biolegend | 580706 | |
| Alt-R® CRISPR-Cas9 Control Kit, Human | Integrated DNA Technologies | 1072554 | Includes tracrRNA, HPRT positive control crRNA, negative control crRNA#1, HPRT Primer Mix, and Nuclease-Free Duplex Buffer. |
| IDTE pH 7.5 (1X TE Solution) | Integrated DNA Technologies | 11-01-02-02 | |
| Alt-R® Cas9 Electroporation Enhancer | Integrated DNA Technologies | 1075915 | Cas9 Electroporation Enhancer |
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Cite This Article
A Technique for Gene Editing in Natural Killer Cells Using CRISPR Cas9. J. Vis. Exp. (Pending Publication), e22252, doi: (2024).