Browse
Submit Data
Databases
API
Help

Dataset Information

0 Views

0 Connections

0 Citations

0 Reanalyses

0 Downloads

Omics score: 0

CRaTER enrichment for on-target gene-editing enables generation of variant libraries in hiPSCs

ABSTRACT: Generation of transgenic cell lines is limited by inefficient gene editing requiring genotypic screening of hundreds to thousands of colonies to isolate correctly gene-edited cells. Here, we describe a novel method called CRISPRa On-Target Editing Retrieval (CRaTER) that enriches for cells with on-target knock-in of a promoterless cDNA-fluorescent reporter transgene by transiently overexpressing the targeted endogenous genetic locus and sorting for fluorescent cells. We use CRaTER to enrich for rare cells with heterozygous, biallelic-editing of the endogenous, transcriptionally-inactive MYH7 locus in human induced pluripotent stem cells (hiPSC), resulting in a 9-fold enrichment compared to antibiotics selection alone. We leveraged CRaTER to enrich for heterozygous knock-in of a library of single nucleotide variants (SNV) in MYH7, a gene encoding for sarcomeric MHC-β wherein autosomal dominant missense mutations cause cardiac and skeletal myopathies. CRaTER enabled 90% enrichment of heterozygous, biallelically-edited hiPSCs – a 38.6-fold enrichment compared to antibiotics selection alone – to generate 113 SNVs comprising 78 missense variants in MYH7. hiPSCs that have undergone CRaTER enrichment can differentiate to cardiomyocytes and exhibit expected localization and expression of MHC-β fusion proteins. Together, CRaTER substantially reduces the screening required for isolation of gene-edited cells, enabling the generation of transgenic cell lines at unprecedented scale.

ORGANISM(S): synthetic construct Homo sapiens

PROVIDER: GSE213520 | GEO | 2023/01/31

REPOSITORIES: GEO

ACCESS DATA

Json Xml

Dataset's files

Source:

			Action	DRS
		Other

Items per page:

1 - 1 of 1

Similar Datasets

Oligogenic inheritance of congenital heart disease involving a NKX2-5 modifier [mouse]

Project description:Complex genetic inheritance is thought to underlie many human diseases, yet experimental proof of this model has been elusive. Here, we show that a human congenital heart defect, left ventricular non-compaction (LVNC), can be caused by a combination of rare, inherited heterozygous missense single nucleotide variants. Whole exome sequencing of a nuclear family revealed novel single nucleotide variants of MYH7 and MKL2 in an asymptomatic father while the offspring with severe childhood-onset LVNC harbored an additional missense variant in the cardiac transcription factor, NKX2-5, inherited from an unaffected mother. Mice bred to compound heterozygosity for the orthologous missense variants in Myh7 and Mkl2 had mild cardiac pathology; the additional inheritance of the Nkx2-5 variant yielded a more severe LVNC-like phenotype in triple compound heterozygotes. RNA sequencing identified genes associated with endothelial and myocardial development that were dysregulated in hearts from triple heterozygote mice and human induced pluripotent stem cell–derived cardiomyocytes harboring the three variants, with evidence for NKX2-5’s contribution as a modifier on the molecular level. These studies demonstrate that the deployment of efficient gene editing tools can provide experimental evidence for complex inheritance of human disease.

2019-05-31 | GSE111394 | GEO

Oligogenic inheritance of congenital heart disease involving a NKX2-5 modifier [human]

2019-05-31 | GSE131322 | GEO

CLIP-seq of Trypanosoma brucei cells in procyclic stages to investigate transcriptome wide mapping of MRB8170 and MRB4160

Project description:iCLIP-seq experiment to asses the binding of mitochondrially targeted MRB8170 and MRB4160 involved in RNA editing on a genomic scale. Furthermore, to investigate what subsets of maxicircles transcripts (pan-edited, minimally-edited and never-edited) are bound to both the above proteins in vivo.

2016-08-14 | E-MTAB-4934 | biostudies-arrayexpress

Mutation-specific reporter for optimization and enrichment of prime editing

Project description:Prime editing is a versatile genome-editing technique that shows great promise for the generation and repair of patient mutations. However, some genomic sites are difficult to edit and optimal design of prime-editing tools remains elusive. Here we present a fluorescent prime editing and enrichment reporter (fluoPEER), which can be tailored to any genomic target site. This system rapidly and faithfully ranks the efficiency of prime edit guide RNAs (pegRNAs) combined with any prime editor variant. We apply fluoPEER to instruct correction of pathogenic variants in patient cells and find that plasmid-editing enriches for genomic editing up to 3-fold compared to conventional enrichment strategies. DNA repair and cell cycle-related genes are enriched in the transcriptome of edited cells. Stalling cells in the G1/S boundary increases prime editing efficiency up to 30%. Together, our results show that fluoPEER can be employed for rapid and efficient correction of patient cells, selection of gene-edited cells, and elucidation of cellular mechanisms needed for successful prime editing.

2022-02-03 | GSE195977 | GEO

Genome-wide specificity of genome editing by both CRISPR-Cas9 and TALEN in the model plant Physcomitrium patens

Project description:CRISPRs and TALENs are efficient systems for gene editing in many organisms including plants. In many cases the CRISPR-Cas or TALEN modules are expressed in the plant cell only transiently. Theoretically, transient expression of the editing modules should limit unexpected effects compared to stable transformation. However, very few studies have measured the off-target and unpredicted effects of editing strategies on the plant genome, and none of them have compared these two major editing systems. We conducted a comprehensive genome-wide investigation of off-target mutations using either a CRISPR-Cas9 or a TALEN strategy. We observed a similar number of SNVs and InDels for the two editing strategies compared to control non-transfected plants, with an average of 8.25 SNVs and 19.5 InDels for the CRISPR-edited plants, and an average of 17.5 SNVs and 32 InDels for the TALEN-edited plants. Interestingly, a comparable number of SNVs and InDels could be detected in the PEG-treated control plants. This shows that except for the on-target modifications, the gene editing tools used in this study did not show a significant off-target activity nor unpredicted effects on the genome, and that the PEG treatment in itself was probably the main source of mutations found in the edited plants.

2022-03-03 | E-MTAB-11497 | biostudies-arrayexpress

Expression profiling in cohesin mutant MCF10A epithelial and CMK leukaemia cells

Project description:MCF10A cells were CRISPR-Cas9 edited to create heterozygous deletion in RAD21 and SMC3 subunits of cohesin. STAG2 is on the X chromosome, hence CRISPR-Cas9 editing resulted in complete loss of STAG2. Total RNA was sequenced from the MCF10A parental and cohesin mutant MCF10A lines. The acute megakaryoblastic leukaemia cell line CMK was CRISPR-Cas9 edited to cotain STAG2 R614* mutation. CRISPR-Cas9 edited STAG2 mutant line showed complete loss of STAG2. CMK parental and the STAG2 mutant line were treated with Wnt3a for 4 hours and total RNA was sequenced at in the control or non-treated (con) and following 4 hours of Wnt3a treatment (Wnt3a4hr).

2020-12-13 | GSE154086 | GEO

Multiplex Epigenome Editing of MECP2 to Rescue Rett Syndrome Neurons (ChIP-Seq)

Project description:Rett syndrome (RTT) is an X-linked neurodevelopmental disorder caused by loss-of-function heterozygous mutations of MECP2. Reactivation of the silent wild-type MECP2 allele on the inactive X chromosome (Xi) represents a promising therapeutic opportunity for female RTT patients. Here, we applied a multiplex epigenome editing approach to reactivate MECP2 on Xi. Demethylation of the MECP2 promoter by dCas9-Tet1 with target sgRNA reactivated MECP2 on Xi in RTT hESCs without detectable off-target effects at the transcriptome level. Neurons derived from methylation edited RTT hESCs reversed the smaller soma size and electrophysiological abnormalities. Insulation of the methylation edited MECP2 locus in RTT neurons by dCpf1-CTCF with target crRNA stabilized MECP2 reactivation and rescued the RTT-related neuronal defects, providing a proof-of-concept study for multiplex epigenome editing to treat RTT.

2023-09-01 | GSE214547 | GEO

Multiplex Epigenome Editing of MECP2 to Rescue Rett Syndrome Neurons (WGBS)

2023-09-01 | GSE214549 | GEO

Pentatricopeptide repeat poly(A) binding protein from mitochondria of trypanosomes

Project description:In Trypanosoma brucei, most mitochondrial mRNAs undergo U-insertion/deletion editing, and 3′ adenylation and uridylation. The internal sequence changes and terminal extensions are coordinated: Pre-editing addition of the short (A) tail protects the edited transcript against 3′-5′ degradation, while post-editing A/U-tailing renders mRNA competent for ribosome recruitment. Participation of a poly(A) binding protein (PABP) in coupling of editing and 3′ modification processes has been inferred, but its identity and mechanism of action remained elusive. We report identification of KPAF4, a pentatricopeptide repeat-containing PABP which sequesters the A-tail and impedes exonucleolytic degradation. Conversely, KPAF4 inhibits uridylation of A-tailed transcripts and, therefore, premature A/U-tailing of partially-edited mRNAs. This quality check point prevents translation of incompletely edited mRNAs. Our findings also implicate the RNA editing substrate binding complex (RESC) in mediating the interaction between the 5′-end bound pyrophosphohydrolase MERS1 and 3′-end associated KPAF4 to enable mRNA circularization. This event is critical for transcript stability during the editing process.

2019-04-02 | PXD012008 | Pride

CRISPR-Cas9 Editing of TLR4 Improves the Outcome of Cardiac Cell Therapy

Project description:We developed and optimized a new electroporation protocol for CRISPR-Cas9 gene editing. This protocol achieved up to 68% success rate, when applied to isolated hMSCs from the heart and epicardial fat of patients with ischemic heart disease. While cell editing resulted lowered TLR4 expression in hMSCs, it did not affect classical markers of hMSCs and proliferation rate. Advanced protein mass spectrometry analysis revealed that edited cells secreted fewer proteins involved in inflammation and in extracellular matrix organization. The immunomodulatory effect of TLR4 editing was apparent in both free and EV-encapsulated proteins. Furthermore, edited cells expressed less NF-ƙB and secreted lower amounts of extracellular vesicles, pro-inflammatory and pro-fibrotic cytokines than unedited hMSCs. Cell therapy with edited and unedited hMSCs improved survival, left ventricular (LV) remodeling, and cardiac function after myocardial infarction (MI) in mice. Postmortem histologic analysis revealed clusters of edited cells that survived in the scar tissue 28 days after MI. Morphometric analysis showed that implantation of edited cells increased the area of myocardial islands in the scar tissue, reduced the occurrence of transmural scar, increased scar thickness, and markedly decreased expansion index, compared with unedited cells or saline.

2023-05-10 | PXD033253 | Pride

OmicsDI is part of the ELIXIR infrastructure

OmicsDI is an Elixir interoperability service. Learn more ›

Tweets

OmicsDI Databases

PRIDE
PeptideAtlas
MassIVE
JPOST Repository
Physiome Model Repository

EGA
EVA
ENA
LINCS
PAXDB
Cell Collective

MetaboLights
Metabolomics Workbench
MetabolomeExpress
GNPS
BioModels
FAIRDOMHub

ArrayExpress
dbGaP
ExpressionAtlas
GEO
NODE

Information

Databases
Help
API
Contact us
Code on GitHub
Terms of use
Submit Data