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CRISPR activation enables high fidelity reprogramming into human pluripotent stem cells (single cells)

ABSTRACT: CRISPR activation enables high fidelity reprogramming into human pluripotent stem cells (single cells)

PROVIDER: PRJNA682165 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR13182616.fastq.gz	Fastqsanger.gz
	SRR13182617.fastq.gz	Fastqsanger.gz
	SRR13182618.fastq.gz	Fastqsanger.gz
	SRR13182619.fastq.gz	Fastqsanger.gz
	SRR13182620.fastq.gz	Fastqsanger.gz

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CRISPR activation enables high fidelity reprogramming into human pluripotent stem cells

Project description:CRISPR activation enables high fidelity reprogramming into human pluripotent stem cells

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CRISPR activation enables high fidelity reprogramming into human pluripotent stem cells (bulk cells)

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CRISPR activation enables high-fidelity reprogramming into human pluripotent stem cells.

Project description:Conventional reprogramming methods rely on the ectopic expression of transcription factors to reprogram somatic cells into induced pluripotent stem cells (iPSCs). The forced expression of transcription factors may lead to off-target gene activation and heterogeneous reprogramming, resulting in the emergence of alternative cell types and aberrant iPSCs. Activation of endogenous pluripotency factors by CRISPR activation (CRISPRa) can reduce this heterogeneity. Here, we describe a high-efficiency reprogramming of human somatic cells into iPSCs using optimized CRISPRa. Efficient reprogramming was dependent on the additional targeting of the embryo genome activation-enriched Alu-motif and the miR-302/367 locus. Single-cell transcriptome analysis revealed that the optimized CRISPRa reprogrammed cells more directly and specifically into the pluripotent state when compared to the conventional reprogramming method. These findings support the use of CRISPRa for high-quality pluripotent reprogramming of human cells.

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CRISPR activation enables high fidelity reprogramming into human pluripotent stem cells

Project description:Conventional reprogramming methods rely on the ectopic expression of transcription factors to reprogram somatic cells into induced pluripotent stem cells (iPSC). Forced expression of transcription factors might lead to off-target gene activation and heterogeneous reprogramming, resulting in the emergence of alternative cell types and aberrant iPSC. Activation of endogenous pluripotency factors by CRISPR activation (CRISPRa) can potentially reduce this heterogeneity. Here we describe a high efficiency reprogramming of human somatic cells into iPSC using optimized CRISPRa. Efficient reprogramming was dependent on the additional targeting of the embryo genome activation-enriched Alu-motif and the miR-302/367 locus. Single-cell transcriptome analysis revealed that the optimized CRISPRa reprogrammed cells with more directly and specifically into the pluripotent state when compared to the conventional reprogramming method. These findings support the use of CRISPRa for high quality reprogramming of human iPSC. This SuperSeries is composed of the SubSeries listed below.

2021-12-23 | GSE162530 | GEO

CRISPR activation enables high fidelity reprogramming into human pluripotent stem cells (bulk cells)

Project description:Conventional reprogramming methods rely on the ectopic expression of transcription factors to reprogram somatic cells into induced pluripotent stem cells (iPSC). Forced expression of transcription factors might lead to off-target gene activation and heterogeneous reprogramming, resulting in the emergence of alternative cell types and aberrant iPSC. Activation of endogenous pluripotency factors by CRISPR activation (CRISPRa) can potentially reduce this heterogeneity. Here we describe a high efficiency reprogramming of human somatic cells into iPSC using optimized CRISPRa. Efficient reprogramming was dependent on the additional targeting of the embryo genome activation-enriched Alu-motif and the miR-302/367 locus. Single-cell transcriptome analysis revealed that the optimized CRISPRa reprogrammed cells with more directly and specifically into the pluripotent state when compared to the conventional reprogramming method. These findings support the use of CRISPRa for high quality reprogramming of human iPSC.

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CRISPR activation enables high fidelity reprogramming into human pluripotent stem cells (single cells)

Project description:Conventional reprogramming methods rely on the ectopic expression of transcription factors to reprogram somatic cells into induced pluripotent stem cells (iPSC). Forced expression of transcription factors might lead to off-target gene activation and heterogeneous reprogramming, resulting in the emergence of alternative cell types and aberrant iPSC. Activation of endogenous pluripotency factors by CRISPR activation (CRISPRa) can potentially reduce this heterogeneity. Here we describe a high efficiency reprogramming of human somatic cells into iPSC using optimized CRISPRa. Efficient reprogramming was dependent on the additional targeting of the embryo genome activation-enriched Alu-motif and the miR-302/367 locus. Single-cell transcriptome analysis revealed that the optimized CRISPRa reprogrammed cells with more directly and specifically into the pluripotent state when compared to the conventional reprogramming method. These findings support the use of CRISPRa for high quality reprogramming of human iPSC.

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The compact high-fidelity EbCas12a enables all-in-one AAV delivery system

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Project description:CRISPR-Cas9-based gene activation (CRISPRa) is an attractive tool for cellular reprogramming applications due to its high multiplexing capacity and direct targeting of endogenous loci. Here we present the reprogramming of primary human skin fibroblasts into induced pluripotent stem cells (iPSCs) using CRISPRa, targeting endogenous OCT4, SOX2, KLF4, MYC, and LIN28A promoters. The low basal reprogramming efficiency can be improved by an order of magnitude by additionally targeting a conserved Alu-motif enriched near genes involved in embryo genome activation (EEA-motif). This effect is mediated in part by more efficient activation of NANOG and REX1. These data demonstrate that human somatic cells can be reprogrammed into iPSCs using only CRISPRa. Furthermore, the results unravel the involvement of EEA-motif-associated mechanisms in cellular reprogramming.

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Project description:Genome engineering using CRISPR/Cas9 technology enables simple, efficient and precise genomic modifications in human cells. Conventional immortalized cell lines can be easily edited or screened using genome-wide libraries with lentiviral transduction. However, cell types derived from the differentiation of induced Pluripotent Stem Cells (iPSC), which often represent more relevant, patient-derived models for human pathology, are much more difficult to engineer as CRISPR/Cas9 delivery to these differentiated cells can be inefficient and toxic. Here, we present an efficient, lentiviral transduction protocol for delivery of CRISPR/Cas9 to macrophages derived from human iPSC with efficiencies close to 100%. We demonstrate CRISPR/Cas9 knockouts for three non-essential proof-of-concept genes - HPRT1, PPIB and CDK4. We then scale the protocol and validate for a genome-wide pooled CRISPR/Cas9 loss-of-function screen. This methodology enables, for the first time, systematic exploration of macrophage involvement in immune responses, chronic inflammation, neurodegenerative diseases and cancer progression, using efficient genome editing techniques.

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