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Editing the Sickle Cell Disease Mutation in Primary Human Hematopoietic Stem Cells: Comparison of Endonucleases and Homologous Donor Templates

ABSTRACT: Editing the Sickle Cell Disease Mutation in Primary Human Hematopoietic Stem Cells: Comparison of Endonucleases and Homologous Donor Templates

PROVIDER: PRJNA543467 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR9077800.fastq.gz	Fastqsanger.gz
	SRR9077810.fastq.gz	Fastqsanger.gz
	SRR9077801.fastq.gz	Fastqsanger.gz
	SRR9077811.fastq.gz	Fastqsanger.gz
	SRR9077802.fastq.gz	Fastqsanger.gz

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Similar Datasets

Editing the Sickle Cell Disease Mutation in Primary Human Hematopoietic Stem Cells: Comparison of Endonucleases and Homologous Donor Templates

Project description:Site-specific correction of a point mutation causing a monogenic disease in autologous hematopoietic stem and progenitor cells (HSPCs) can be used as a treatment of inherited disorders of the blood cells. Sickle Cell Disease (SCD) is an ideal model to investigate the potential use of gene editing to transvert a single point mutation at the β-globin locus (HBB). We compared the activity of ZFNs and CRISPR/Cas9 for editing and homologous donor templates delivered as single-stranded oligodeoxynucleotides (ssODN), adeno-associated virus serotype 6 (AAV6), integrase-deficient lentiviral vectors (IDLV) and adenovirus 5/35 serotype (Ad5/35) to transvert the base-pair responsible for SCD in HBB in primary human CD34+ HSPCs. We found that the ZFNs and Cas9 directed similar frequencies of nuclease activity. In vitro, AAV6 led to the highest frequencies of homology-directed repair (HDR), but levels of base-pair transversions were significantly reduced when analyzing cells in vivo in immune-deficient mouse xenografts, with similar frequencies achieved with either AAV6 or ssODN. AAV6 also caused significant impairment of colony-forming progenitors and human cell engraftment. Gene correction in engrafting hematopoietic stem cells may be limited by the capacity of the cells to mediate HDR, suggesting additional manipulations may be needed for high efficiency gene correction in HSPCs

2019-05-18 | GSE131387 | GEO

Editing the Sickle Cell Disease Mutation in Human Hematopoietic Stem Cells: Comparison of Endonucleases and Homologous Donor Templates.

Project description:Site-specific correction of a point mutation causing a monogenic disease in autologous hematopoietic stem and progenitor cells (HSPCs) can be used as a treatment of inherited disorders of the blood cells. Sickle cell disease (SCD) is an ideal model to investigate the potential use of gene editing to transvert a single point mutation at the ?-globin locus (HBB). We compared the activity of zinc-finger nucleases (ZFNs) and CRISPR/Cas9 for editing, and homologous donor templates delivered as single-stranded oligodeoxynucleotides (ssODNs), adeno-associated virus serotype 6 (AAV6), integrase-deficient lentiviral vectors (IDLVs), and adenovirus 5/35 serotype (Ad5/35) to transvert the base pair responsible for SCD in HBB in primary human CD34+ HSPCs. We found that the ZFNs and Cas9 directed similar frequencies of nuclease activity. In vitro, AAV6 led to the highest frequencies of homology-directed repair (HDR), but levels of base pair transversions were significantly reduced when analyzing cells in vivo in immunodeficient mouse xenografts, with similar frequencies achieved with either AAV6 or ssODNs. AAV6 also caused significant impairment of colony-forming progenitors and human cell engraftment. Gene correction in engrafting hematopoietic stem cells may be limited by the capacity of the cells to mediate HDR, suggesting additional manipulations may be needed for high-efficiency gene correction in HSPCs.

| S-EPMC6697408 | biostudies-literature

Precise Genome Editing in vivo with Single, Canonical AAV Vectors. Encoding Guide RNA, Cas9, and Homologous Repair Donor

Project description:Adeno-associated virus (AAV) vectors are important delivery platforms for therapeutic genome editing but are severely constrained by cargo limits, especially for large effectors like Cas9s. Simultaneous delivery of multiple vectors can limit dose and efficacy and increase safety risks. The use of compact effectors has enabled single-AAV delivery of Cas9s with 1-3 guides for edits that use end-joining repair pathways, but many precise edits that correct disease-causing mutations in vivo require homology-directed repair (HDR) templates. Here, we describe single-vector, ~4.8-kb AAV platforms that express Nme2Cas9 and either two sgRNAs to produce segmental deletions, or a single sgRNA with an HDR template. We also examine the utility of Nme2Cas9 target sites in the vector for self-inactivation. We demonstrate that these platforms can effectively treat two disease models [type I hereditary tyrosinemia (HT-I) and mucopolysaccharidosis type I (MPS-I)] in mice. These results will enable single-vector AAVs to achieve diverse therapeutic genome editing outcomes.

2020-10-19 | GSE159356 | GEO

Precise Genome Editing in vivo with Single, Canonical AAV Vectors. Encoding Guide RNA, Cas9, and Homologous Repair Donor

Project description:Precise Genome Editing in vivo with Single, Canonical AAV Vectors. Encoding Guide RNA, Cas9, and Homologous Repair Donor

| PRJNA668612 | ENA

IL-18 mediates sickle cell cardiomyopathy and inducible ventricular arrhythmias

Project description:Rationale. Sickle cell cardiomyopathy is characterized by prolonged QTc, myocardial fibrosis, diastolic dysfunction, and vulnerability to ventricular tachycardia (VT). Based on previous reports, IL-18 mediates cardiac fibrosis and its promoter SNPs are associated with sudden cardiac death in a non-sickle population. We, therefore, hypothesized that IL-18 may mediate cardiomyopathy and VT in sickle cell disease. Findings. Sickle cell patients with evidence of myocardial fibrosis demonstrated greater IL18 expression. Patients with higher IL18 gene expression levels also exhibited increased QTc intervals and overall mortality. A novel SNP within IL-18, rs5744285, was associated with both QTc and IL-18 expression levels. Similar to sickle cell patients, sickle mice demonstrated increased cardiac fibrosis and prolonged action potential duration (APD) associated with higher VT inducibility. Administration of exogenous IL-18 acutely ex vivo to hearts resulted in increased triggered activity and VTs while inhibition of IL-18 resulted in reduced cardiac NFkB expression, fibrosis, and dysfunction in sickle mice. Conclusions. IL-18 is associated with prolonged QTc, myocardial fibrosis, and mortality in sickle cell patients, and prolonged APD associated with heightened VT susceptibility in sickle mice. Inhibition of IL-18 improves cardiac function, in part, via NFκB. Inflammatory cytokines contribute to the development of sickle cardiomyopathy and inducible VT.

2018-10-31 | GSE89373 | GEO

Expression analysis of inflammatory cytokines in exhaled breath condensates from pediatric patients with sickle cell disease, asthma, sickle cell disease and asthma, and controls

Project description:To analyze expression of inflammatory cytokines in Exhaled Breath Condensates from pediatric patients with sickle cell disease, asthma, sickle cell disease and asthma, and controls

2020-05-08 | GSE150056 | GEO

Transcription-coupled donor DNA expression increases homologous recombination for efficient genome editing.

Project description:Genomes can be edited by homologous recombination stimulated by CRISPR/Cas9 [clustered regularly interspaced short palindromic repeats (CRISPR)/CRISPR-associated peptide 9]-induced DNA double-strand breaks. However, this approach is inefficient for inserting or deleting long fragments in mammalian cells. Here, we describe a simple genome-editing method, termed transcription-coupled Cas9-mediated editing (TEd), that can achieve higher efficiencies than canonical Cas9-mediated editing (CEd) in deleting genomic fragments, inserting/replacing large DNA fragments and introducing point mutations into mammalian cell lines. We also found that the transcription on DNA templates is crucial for the promotion of homology-directed repair, and that tethering transcripts from TEd donors to targeted sites further improves editing efficiency. The superior efficiency of TEd for the insertion and deletion of long DNA fragments expands the applications of CRISPR for editing mammalian genomes.

| S-EPMC9638910 | biostudies-literature

bT87Q-globin gene therapy reduces sickle hemoglobin production, allowing for ex vivo anti-sickling activity in human erythroid cells

Project description:We performed RNA-seq analysis on immortalized human erythroid cell line (HUDEP-2), that had been engineered to carry the sickle cell disease (SCD) mutation (sHUDEP-2), and on healthy donor mobilized CD34+ derived cells after transduction with a control GFP lentivirus and lentivirus expressing βT87Q-globin. Our results show activation of inflammation- and proliferation-related programs, suggesting minimal changes of background gene expression except for βT87Q-globin expression and endogenous β/βs-globin suppression.

2020-04-13 | GSE148529 | GEO

The proteome of neutrophils in sickle cell disease

Project description:Polymorphonuclear neutrophils are key actors in the pathophysiology of sickle cell disease, but specific factors underlying their activation and sustained inflammation are not well documented. In the present study, we investigated the proteome of neutrophils by a label-free global comparative approach between 4 non-treated sickle patients (SS genotype) at steady state and 4 healthy donors. We identified 101 proteins differentially expressed in SS and normal neutrophils. We found overexpression of CD64 and under-expression of CD62L suggestive of an activated and aged neutrophil profile in SS patients. Comparison of the two proteomes revealed a strong involvement of the type 1 interferon (IFN) response pathway with a 3- to 84-fold increase of type 1 IFN-induced proteins in SS neutrophils, and overexpression of STAT1 and STAT2. Thus, we next determined the plasmatic concentration of type 1 IFNs (IFNα and IFNβ) using the digital-ELISA technology and found a significant higher concentration of IFNα in the plasma from half of our SS patients compared to controls. Overall, a dramatic high-level expression of IFNα signaling proteins in neutrophils from SS patients suggests auto-inflammatory-like phenotype in sickle cell disease at steady state. This finding could open the way to new anti-inflammatory therapies.

2020-11-11 | PXD014457 | Pride

PGC-1α Agonism Induces Fetal Hemoglobin and Exerts Anti-Sickling Effects in Sickle Cell Disease

Project description:Sickle cell disease is a growing health burden afflicting millions around the world. Clinical observation and laboratory studies have shown that the severity of sickle cell disease is ameliorated in individuals who have elevated levels of fetal hemoglobin. However, pharmacologic induction of fetal hemoglobin sufficient to diminish clinical severity in sickle patients has been challenging. We recently found that up-regulation of PGC-1α can induce fetal hemoglobin synthesis in human primary erythroblasts. Here, we report that a small molecular compound SR-18292 increases PGC-1α leading to enhanced fetal hemoglobin expression in human erythroid cells or β-YAC and sickle cell disease mice. Sickled red blood cells are significantly reduced and disease complications are alleviated in SR-18292-treated sickle mice. SR-18292, or agents in its class, could be a promising therapeutic for sickle cell disease.

2024-08-08 | GSE256494 | GEO

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