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RNA-Targeting CRISPR/Cas13d System Alleviates Disease-Related Phenotypes in Pre-clinical Models of Huntington’s Disease (Mouse).

ABSTRACT: RNA-Targeting CRISPR/Cas13d System Alleviates Disease-Related Phenotypes in Pre-clinical Models of Huntington’s Disease (Mouse).

PROVIDER: PRJNA883965 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR21696928_1.fastq.gz	Fastqsanger.gz
	SRR21696928_2.fastq.gz	Fastqsanger.gz
	SRR21696929_1.fastq.gz	Fastqsanger.gz
	SRR21696929_2.fastq.gz	Fastqsanger.gz
	SRR21696930_1.fastq.gz	Fastqsanger.gz

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RNA-Targeting CRISPR/Cas13d System Alleviates Disease-Related Phenotypes in Pre-clinical Models of Huntington’s Disease

Project description:RNA-Targeting CRISPR/Cas13d System Alleviates Disease-Related Phenotypes in Pre-clinical Models of Huntington’s Disease

| PRJNA883961 | ENA

RNA-Targeting CRISPR/Cas13d System Alleviates Disease-Related Phenotypes in Pre-clinical Models of Huntington’s Disease (Human).

Project description:RNA-Targeting CRISPR/Cas13d System Alleviates Disease-Related Phenotypes in Pre-clinical Models of Huntington’s Disease (Human).

| PRJNA883962 | ENA

RNA-Targeting CRISPR/Cas13d System Alleviates Disease-Related Phenotypes in Pre-clinical Models of Huntington’s Disease (Human).

Project description:Huntington's disease (HD) is a fatal, dominantly inherited neurodegenerative disorder caused by a CAG trinucleotide expansion in exon 1 of the huntingtin (HTT) gene. Although the pathogenesis of HD remains complex, the CAG-expanded (CAGEX) HTT mRNA and protein ultimately causes disease through a toxic gain-of-function mechanism. As the reduction of pathogenic mutant HTT mRNA is beneficial as a treatment, we developed a mutant allele-sensitive CAGEX RNA-targeting CRISPR-Cas13d system (Cas13d/CAGEX) that eliminates toxic CAGEX RNA in HD patient-derived fibroblasts and iPSC-derived striatal neurons. We show that intrastriatal delivery of Cas13d/CAGEX via a single adeno-associated viral vector, serotype 9 (AAV9) mediates significant and selective reduction of mutant HTT mRNA and protein levels within the striatum of heterozygous zQ175 mice, an established mouse model of HD. Moreover, the reduction of mutant HTT mRNA renders a sustained partial reversal of HD phenotypes, including improved motor coordination, attenuated striatal atrophy, and reduction of mutant HTT protein aggregates. Importantly, phenotypic improvements were durable for at least 8 months without gross or behavioral adverse effects, and with minimal off-target interactions of Cas13d/CAGEX in the mouse transcriptome. Taken together, we demonstrate a proof-of-principle of an RNA-targeting CRISPR/Cas13d system as a therapeutic approach for HD, a strategy with broad implications for the treatment of other dominantly inherited neurodegenerative disorders.

2022-11-15 | GSE214108 | GEO

RNA-Targeting CRISPR/Cas13d System Alleviates Disease-Related Phenotypes in Pre-clinical Models of Huntington’s Disease (Mouse).

2022-11-15 | GSE214109 | GEO

RNA-Targeting CRISPR/Cas13d System Alleviates Disease-Related Phenotypes in Pre-clinical Models of Huntington’s Disease

Project description:This SuperSeries is composed of the SubSeries listed below.

2022-11-15 | GSE214110 | GEO

An RNA-targeting CRISPR-Cas13d system alleviates disease-related phenotypes in Huntington's disease models.

Project description:Huntington's disease (HD) is a fatal, dominantly inherited neurodegenerative disorder caused by CAG trinucleotide expansion in exon 1 of the huntingtin (HTT) gene. Since the reduction of pathogenic mutant HTT messenger RNA is therapeutic, we developed a mutant allele-sensitive CAGEX RNA-targeting CRISPR-Cas13d system (Cas13d-CAGEX) that eliminates toxic CAGEX RNA in fibroblasts derived from patients with HD and induced pluripotent stem cell-derived neurons. We show that intrastriatal delivery of Cas13d-CAGEX via an adeno-associated viral vector selectively reduces mutant HTT mRNA and protein levels in the striatum of heterozygous zQ175 mice, a model of HD. This also led to improved motor coordination, attenuated striatal atrophy and reduction of mutant HTT protein aggregates. These phenotypic improvements lasted for at least eight months without adverse effects and with minimal off-target transcriptomic effects. Taken together, we demonstrate proof of principle of an RNA-targeting CRISPR-Cas13d system as a therapeutic approach for HD, a strategy with implications for the treatment of other dominantly inherited disorders.

| S-EPMC9829537 | biostudies-literature

Cas13d experimental viral genome-wide screen identifies regions of RNA vulnerability in SARScov2

Project description:We performed an experimental Cas13d-SARScov2 genome-wide screen to identify gRNAs that would allow Cas13d to degrade the viral RNA. We built mCherry reporter plasmids that express mCherry with a 3kb 3'UTR deriving from the SARScov2 genome. In total we designed 11 reporters covering the entire plus strand of the viral genome and 11 other reporters covering the entire minus strand. Each of the 22 mCherry reporter plasmids carries a U6 expression cassette containing a Cas13d gRNA that targets the 3'UTR of the mCherry reporter. Each reporter is represented by a pool of reporters each containing a different gRNA that targets mCherry 3'UTR for a total average of ~300 gRNA per 3'UTR. The entire pool of 22 reporters, each with a pool of ~300 different gRNAs constitutes a comprehensive set ~6,500 reporters (~ 6,500 different gRNAs) that allowed us to interrogate the entire SARScov2 plus and minus strand viral RNA for regions of vulnerability and targetability. In order to specifically interrogate Cas13d activity an remove the biases that would be introduced in the reporter expression by the presence of a large 3kb 3'UTR we used a case (presence of Cas13d) control (absence of Cas13d) design. Briefly, the ~6,500 reporters were lentiviral transduced in RKO cells, the cells were split in 2 populations, 1 population was transduced with Cas13d and the other serving as control did not. The population expressing Cas13d was FACS sorted in low mCherry (efficient gRNAs) and high mCherry (un-efficient gRNAs) in 2 biological replicates and the genomic DNA of these populations was extracted, gRNAs were PCR amplified and sequenced. For the population that did not express Cas13d, a low mCherry, one high mCherry and unsorted population were sequenced as control libraries.

2023-10-29 | E-MTAB-11111 | biostudies-arrayexpress

A broad phenotypic screen identifies novel dominant phenotypes in Huntington’s disease CAG knock-in mice

Project description:Huntington’s disease (HD) is a dominantly inherited neurodegenerative disorder characterized by abnormal voluntary and involuntary movements, cognitive impairment and psychiatric disturbances. In order to identify phenotypic changes in the mouse that are most likely to be relevant to events triggered by the CAG repeat expansion in HD patients, we are interested in the earliest events that are triggered by expression of a single allele’s worth of full-length mutant huntingtin in the mouse, whether at the molecular, cellular or whole animal level. To this end, we have undertaken a broad-based, unbiased phenotypic screen in heterozygous HdhQ111/+ C57BL/6J mice. For expression profiling analysis, four male mice at the age of 18 weeks were analysed versus a pool of four male wildtype mice (reference) at the same age. For each single mouse, two chip hybridizations, including a dye-swap experiment, were performed per tissue. Using our genome-wide microarray platform, we performed transcriptome analysis of liver and brain.

2011-09-30 | E-GEOD-28232 | biostudies-arrayexpress

Depletion of p62 reduces nuclear inclusions and paradoxically ameliorates disease phenotypes in Huntington’s model mice

Project description:Huntington’s disease (HD) is a dominantly inherited genetic disease caused by mutant huntingtin (htt) protein with expanded polyglutamine tracts. A neuropathological hallmark of HD is the presence of neuronal inclusions of mutant htt. p62 is an important regulatory protein in selective autophagy, a process by which aggregated proteins are degraded, and it is associated with several neurodegenerative disorders including HD. Here we investigated the effect of p62 depletion in three HD model mice: R6/2, HD190QG and HD120QG mice. We found that loss of p62 in these models led to longer lifespans and reduced nuclear inclusions, although cytoplasmic inclusions increased with polyglutamine length. In mouse embryonic fibroblasts (MEFs) with or without p62, mutant htt with a nuclear localization signal (NLS) showed no difference in nuclear inclusion between the two MEF types. In the case of mutant htt without NLS, however, p62 depletion increased cytoplasmic inclusions. Furthermore, to examine the effect of impaired autophagy in HD model mice, we crossed R6/2 mice with Atg5 conditional knockout mice. These mice also showed decreased nuclear inclusions and increased cytoplasmic inclusions, similar to HD mice lacking p62. These data suggest that the genetic ablation of p62 in HD model mice enhances cytoplasmic inclusion formation by interrupting autophagic clearance of polyQ inclusions. This reduces polyQ nuclear influx and paradoxically ameliorates disease phenotypes by decreasing toxic nuclear inclusions. Gene expression profiles were analyzed to examine the effects of p62 depletion in mouse with or without mutant huntingtin exon 1

2014-10-10 | GSE62210 | GEO

Huntington’s disease as a lamin B1 nuclear envelopathy

Project description:Huntington’s disease as a lamin B1 nuclear envelopathy

| PRJNA587460 | ENA