CRISPR-Cas12a for Highly Efficient and Marker-Free Targeted Integration in Human Pluripotent Stem Cells.
Ruba HammadJamal AlzubiManuel RhielKay O ChmielewskiLaura MostiJulia RositzkaMarcel HeugelJan LawrenzValentina PennucciBirgitta GläserJudith FischerAxel SchambachThomas MoritzNico LachmannTatjana I CornuClaudio MussolinoRichard SchäferToni CathomenPublished in: International journal of molecular sciences (2024)
The CRISPR-Cas12a platform has attracted interest in the genome editing community because the prototypical Acidaminococcus Cas12a generates a staggered DNA double-strand break upon binding to an AT-rich protospacer-adjacent motif (PAM, 5'-TTTV). The broad application of the platform in primary human cells was enabled by the development of an engineered version of the natural Cas12a protein, called Cas12a Ultra. In this study, we confirmed that CRISPR-Cas12a Ultra ribonucleoprotein complexes enabled allelic gene disruption frequencies of over 90% at multiple target sites in human T cells, hematopoietic stem and progenitor cells (HSPCs), and induced pluripotent stem cells (iPSCs). In addition, we demonstrated, for the first time, the efficient knock-in potential of the platform in human iPSCs and achieved targeted integration of a GFP marker gene into the AAVS1 safe harbor site and a CSF2RA super-exon into CSF2RA in up to 90% of alleles without selection. Clonal analysis revealed bi-allelic integration in >50% of the screened iPSC clones without compromising their pluripotency and genomic integrity. Thus, in combination with the adeno-associated virus vector system, CRISPR-Cas12a Ultra provides a highly efficient genome editing platform for performing targeted knock-ins in human iPSCs.
Keyphrases
- crispr cas
- genome editing
- induced pluripotent stem cells
- highly efficient
- pluripotent stem cells
- endothelial cells
- high throughput
- healthcare
- copy number
- high resolution
- mental health
- gene expression
- dna methylation
- genome wide
- single molecule
- mass spectrometry
- drug delivery
- small molecule
- idiopathic pulmonary fibrosis
- climate change
- transcription factor
- nucleic acid