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Screening for genes that promote copper toxicity in a cell model of Wilson disease

ABSTRACT: Screening for genes that promote copper toxicity in a cell model of Wilson disease

PROVIDER: PRJNA1081796 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR28148107.fastq.gz	Fastqsanger.gz
	SRR28148108.fastq.gz	Fastqsanger.gz
	SRR28148109.fastq.gz	Fastqsanger.gz
	SRR28148110.fastq.gz	Fastqsanger.gz
	SRR28148111.fastq.gz	Fastqsanger.gz

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Screening for genes that promote copper toxicity in a cell model of Wilson disease

Project description:To find new genes that might be targeted for reduction of Copper (Cu) toxicity in Wilson disease we employed genome-wide shRNA screening in ATP7B-KO HepG2 cells, a bona fide WD cell model. Cells were screened using the Dharmacon™ Decode™ Pooled Lentiviral shRNA Screening Library targeting 18205 human genes (Dharmacon #RHS6083). The Lentiviral RNAi screening library is made of 10 pools of 9570 GIPZ short hairpin RNAs (shRNAs) packaged into high-titer lentiviral particles. Genomic DNA was isolated from the cells and read counts for each shRNAs were obtained by deep sequencing to determine the abundance of each shRNA in the Cu-treated cells compared to controls. This analysis allowed the identification of genes whose downregulation promoted survival of ATP7B-KO cells upon Cu overload. To exclude that some shRNAs would have been responsible for ATP7B-KO survival by suppressing generic proapoptotic genes, we run the same screening with the proapoptotic drug vinblastine instead of CuCl2. Genes, whose suppression allowed cell to resist Cu but not vinblastine were considered as Cu-specific hits and through this approach we identified PrP as a suitable target for reduction of Cu toxicity in WD. Indeed, we found that Cu accumulation in ATP7B-KO cells stimulates expression of PrP, which brings to toxic Cu overload while PrP suppression significantly reduces Cu accumulation and toxicity in ATP7B-deficient cells. In sum our data highlight an important regulatory role of PrP in copper metabolism and as a therapeutic tool for Wilson disease.

2024-12-09 | GSE260454 | GEO

Screening for genes that promote copper toxicity in a cell model of Wilson disease [HepG2 cells ATP7B-KO]

2024-12-09 | GSE277865 | GEO

Screening for genes that promote copper toxicity in a cell model of Wilson disease [HepG2 cells ATP7B-KO]

Project description:Screening for genes that promote copper toxicity in a cell model of Wilson disease [HepG2 cells ATP7B-KO]

| PRJNA1164671 | ENA

TRANSCRIPTIONAL REMODELLING IN RESPONSE TO CHANGING COPPER LEVELS IN WILSON DISEASE MODEL OF SACCHAROMYCES CEREVISIAE

Project description:A 3 x 2 factorial design was used to elucidate the genome-wide transcriptional response to the deletion of yeast ortholog of Wilson and Menkes disease causing gene; CCC2, at changing copper levels. Homozygous deletion mutant of CCC2, which encodes Cu+2 transporting P-type ATPase required to export copper from the cytosol into the extracytosolic compartment, and the reference strain were cultivated in fully controlled fermenters in duplicates in glucose-rich defined medium containing three different levels of copper. The three different copper concentrations were selected such that; copper deficient condition, which was prepared by excluding the CuSO4.7H2O from the defined medium, low copper or adequate copper concentration, which is the standard amount of copper in defined medium (0.04 ?M) and high copper concentration (0.5 mM), which was able to restore respiration deficiency in ccc2?/ccc2? strain.

2013-09-02 | E-MEXP-3927 | biostudies-arrayexpress

Specific changes of liver transcriptome in the early stages of copper accumulation in the mouse model of wilson disease

Project description:Wilson disease (WD) is a severe metabolic disorder caused by genetic inactivation of copper-transporting ATPase ATP7B. In WD, copper accumulates in several tissues, particularly in the liver, inducing marked time-dependent pathological changes. To identify initial events in the copper-dependent development of liver pathology we utilized the Atp7b-/- mice, an animal model for WD. Analysis of mRNA from livers of control and Atp7b-/- 6 weeks-old mice using oligonucleotide arrays revealed specific changes of the transcriptome at this stage of copper accumulation. Few messages (29 up-regulated and 46 down-regulated) change their abundance more than 2-fold pointing to the specific effect of copper on gene expression/mRNA stability. The gene ontology analysis revealed copper effects on distinct metabolic pathways. Keywords: comparative genomic hybridization

2006-12-19 | GSE5348 | GEO

Transcription profiling of mouse model of Wilson disease reveals specific changes of liver transcriptome in the early stages of copper accumulation

2008-06-13 | E-GEOD-5348 | biostudies-arrayexpress

Wilson disease: intersecting DNA methylation and histone acetylation mechanisms affect gene expression regulation in a mouse model of hepatic copper accumulation [ChIP-Seq]

Project description:Prior investigations of DNA methylation differences in WD liver and blood and in a WD mouse model revealed an epigenetic signature of WD that included the histone deacetylase, HDAC5. To test the hypothesis that histone deacetylation and acetylation might be altered with respect to copper overload and aberrant DNA methylation in WD, we used the Jackson Laboratory toxic milk model (tx-j) of WD to study the involvement of Class IIa histone deacetylases (HDAC4 and HDAC5) and histone acetylation (H3K9ac and H3K27ac), and the effects of copper chelator D-penicillamine (PCA) and/or methyl group donor choline on histone modification. Next, we related acetylation profiles of H3K27ac to gene expression changes in wilson disease by ChIP and RNA-seq.

2021-07-09 | GSE168971 | GEO

Wilson disease: intersecting DNA methylation and histone acetylation mechanisms affect gene expression regulation in a mouse model of hepatic copper accumulation [RNA-Seq]

2021-07-09 | GSE168833 | GEO

Copper toxicity response influences mesotrophic Synechococcus community structure

Project description:Picocyanobacteria from the genus Synechococcus are ubiquitous in ocean waters. Their phylogenetic and genomic diversity suggests ecological niche differentiation, but the selective forces influencing this are not well defined. Marine picocyanobacteria are sensitive to Cu toxicity, so adaptations to this stress could represent a selective force within, and between, “species” also known as clades. We compared Cu stress responses in cultures and natural populations of marine Synechococcus from two co-occurring major mesotrophic clades (I and IV). Using custom microarrays and proteomics to characterize expression responses to Cu in the lab and field, we found evidence for a general stress regulon in marine Synechococcus. However, the two clades also exhibited distinct responses to copper. The Clade I representative induced expression of genomic island genes in cultures and Southern California Bight populations, while the Clade IV representative downregulated Fe-limitation proteins. Copper incubation experiments suggest that Clade IV populations may harbor stress-tolerant subgroups, and thus fitness tradeoffs may govern Cu-tolerant strain distributions. This work demonstrates that Synechococcus has distinct adaptive strategies to deal with Cu toxicity at both the clade and subclade level, implying that metal toxicity and stress response adaptations represent an important selective force for influencing diversity within marine Synechococcus populations.

2016-10-28 | GSE89262 | GEO

Copper toxicity response influences mesotrophic Synechococcus community structure

Project description:Copper toxicity response influences mesotrophic Synechococcus community structure

| PRJNA350850 | ENA