Genome-wide analysis of host mRNA translation during hepatitis C virus infection
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ABSTRACT:
ORGANISM(S): Homo sapiens
PROVIDER: GSE44210 | GEO | 2013/02/12
SECONDARY ACCESSION(S): PRJNA189181
REPOSITORIES: GEO
Similar Datasets
Project description:This study is complementary to the "Genome-wide analysis of host mRNA translation during hepatitis C virus infection" study (GSE44210), for which sucrose gradient ultracentrifugation followed by microarray analysis was used to identify translationally-regulated mRNAs (mRNAs associated with ribosomes) from JFH1-infected and uninfected Huh-7.5.1 cells. MicroRNA arrays have been conducted in parallel on total RNA from infected and uninfected cells, in order to determine if microRNA regulation could explain some of the mRNA translation regulations.
2013-02-17 | GSE44369 | GEO
Project description:Sucrose gradient ultracentrifugation followed by microarray analysis was used to identify translationally-regulated mRNAs (mRNAs associated with ribosomes) from JFH1-infected and uninfected Huh-7.5.1 cells. Huh7 cells were infected with HCV JFH-1 strain. Controls consisted in non-infected cells and infected cells treated with an anti-protease. 3 days after infection, cell lysates were subjected to sucrose-gradient centrifugation in order to isolate polysome-free RNAs from polysome-bound (translated) RNAs. The non-polysomal, polysomal as well as cytosolic (non fractionned) RNAs, from infected, non-infected, and infected-treated cells were subject sur microarray analysis.
2013-02-12 | E-GEOD-44210 | biostudies-arrayexpress
Project description:This study is complementary to the "Genome-wide analysis of host mRNA translation during hepatitis C virus infection" study (GSE44210), for which sucrose gradient ultracentrifugation followed by microarray analysis was used to identify translationally-regulated mRNAs (mRNAs associated with ribosomes) from JFH1-infected and uninfected Huh-7.5.1 cells. MicroRNA arrays have been conducted in parallel on total RNA from infected and uninfected cells, in order to determine if microRNA regulation could explain some of the mRNA translation regulations. Huh7 cells were infected with HCV JFH-1 strain. Controls consisted in non-infected cells. 3 days after infection, total RNAs were extracted from cell lysate and subjected to miRNA microarray analysis.
2013-02-17 | E-GEOD-44369 | biostudies-arrayexpress
Project description:Cotranslational targeting into the endoplasmic reticulum (ER) by the Signal Recognition Particle (SRP) is a key event determining polypeptide fate in eukaryotic cells. Here, we globally define the principles and mechanisms of SRP binding and ER targeting in vivo. Cotranslational targeting through SRP is the dominant route into the ER for all secretory proteins, regardless of targeting signal characteristics. Cytosolic SRP functions in a pioneer translation round that builds a membrane-resident mRNAs pool, explaining how low SRP levels suffice for the secretory load. SRP does not induce an elongation arrest; consequently, kinetic competition between targeting and translation elongation dictates which substrates are translocated post-translationally. Unexpectedly, SRP binds most secretory ribosomal complexes before targeting signals are synthesized. We show non-coding mRNA elements can promote signal-independent SRP pre-recruitment. Our study defines the complex kinetic interplay between elongation and determinants in the polypeptide and mRNA modulating SRP-substrate selection and membrane targeting in vivo. Ribosome profiling (RiboSeq) and RNA-seq of subcellular fractions of ribosomes. Soluble and membrane bound ribosomes are separated by centrifugation, and SRP-bound ribosomes are immunoprecipitated from the soluble fraction. Polysomes and monosomes are separated by sucrose gradient ultracentrifugation.
2016-08-03 | E-GEOD-74393 | biostudies-arrayexpress
Project description:Hepatitis C virus (HCV) is a global problem. To better understand HCV infection researchers employ in vitro HCV cell-culture (HCVcc) systems that use Huh-7 derived hepatoma cells that are particularly permissive to HCV infection. A variety of hyper-permissive cells have been subcloned for this purpose. In addition, subclones of Huh-7 which have evolved resistance to HCV are available. However, the mechanisms of susceptibility or resistance to infection among these cells have not been fully determined. In order to elucidate mechanisms by which hepatoma cells are susceptible or resistant to HCV infection we performed genome-wide expression analyses of six Huh-7 derived cell cultures (Huh-7, Huh-7.5.1, Huh-7.5.1c2, R1.09, R1.10 and R2.1) R that have different levels of permissiveness to infection. A great number of genes, representing a wide spectrum of functions are differentially expressed between cells. To focus our investigation, we identify host proteins from HCV replicase complexes, perform gene expression analysis of three HCV infected cells (infected Huh-7, Huh-7.5.1 and Huh-7.5.1c2) and conduct a detailed analysis of differentially expressed host factors by integrating a variety of data sources. Our results demonstrate that changes relating to susceptibility to HCV infection in hepatoma cells are linked to the innate immune response, secreted signal peptides and host factors that have a role in virus entry and replication. This work identifies both known and novel host factors that may influence HCV infection. Our findings build upon current knowledge of the complex interplay between HCV and the host cell, which could aid development of new antiviral strategies. Six Huh-7 derived hepatoma cell types that have different levels of susceptibility to HCV infection in cell culture are used: Huh-7, Huh-7.5.1, Huh-7.5.1c2, R1.09, R1.10 and R2.1. Of these the first three (label starting Huh are susceptible to HCV infection and the latter three (label starting R are resistant to HCV infection. All cell types are derived from Huh-7. Huh-7.5.1 is a subclone of Huh-7.5 that in turn is a subclone of Huh-7. Huh-7.5.1c2 is a subclone of Huh-7.5.1. R1.09 and R1.10 are subclones of R1 that is inturn a sublone of Huh-7.5,1. R2.1 is a subclone of Huh-7.5.1. 39 samples are used. In every case there are 3 biological replicates, i.e., there are 13 unique conditions (39/3=13). These samples are subdivided between two studies: (1) A comparison of HCV infection resistant cells R1.09, R1.10 and R2 against HCV susceptible Huh-7.5.1. (2) A comparison of JFH1 HCV infected Huh-7, Huh-7.5.1 and Huh-7.5.1c2 cells versus their uninfected counterparts. In each case there are two uninfected counterparts, cells that were harvested after being in culture for 20 hours and cells that were harvested at the same time point as the infected cells, that is, at the peak time of infection. Peak times for infection vary between cells, depending on their susceptibility to infection: 168 hours for Huh-7, 120 hours for Huh-7.5.1 and 96 hours for Huh-7.5.1c2.
2011-06-11 | E-GEOD-29889 | biostudies-arrayexpress
Project description:We investigated the association of cryptic unstable transcripts (CUTs) to ribosomes in Saccharomyces cerevisiae. We used 5’cap-sequence followed by sucrose gradient fractionation of polyribosome fractions after ultracentrifugation to assess the relative association of transcripts to the ribosomes. We used 5PSeq approach, which measures ribosome dynamics by sequencing the presence of co-translation mRNA degradation intermediates, to assess if cryptic transcripts are engaged in active translation. We performed 5PSeq after glucose depletion to increase the number of ribosomes stop at the 5’UTR and start codon.
2019-10-01 | GSE119134 | GEO
Project description:Silencing of FMR1 and loss of its gene product FMRP results in Fragile X Syndrome. FMRP binds brain mRNAs and inhibits polypeptide elongation. Using ribosome profiling of the hippocampus, we find that ribosome footprint levels in Fmr1-deficient tissue mostly reflect changes in RNA abundance. Profiling over a time course of ribosome runoff in wildtype tissue reveals a wide range of ribosome translocation rates; on many mRNAs, the ribosomes are stalled. Sucrose gradient ultracentrifugation of hippocampal slices after ribosome runoff reveals that FMRP co-sediments with stalled ribosomes; and its loss results in decline of ribosome stalling on specific mRNAs. One such mRNA encodes SETD2, a lysine methyltransferase that catalyzes H3K36me3. ChIP-Seq demonstrates that loss of FMRP alters the deployment of this epigenetic mark on chromatin. H3K36me3 is associated with alternative pre-RNA processing, which we find occurs in an FMRP-dependent manner on transcripts linked to neural function and autism spectrum disorders.
2020-03-31 | GSE143329 | GEO
Project description:Silencing of FMR1 and loss of its gene product FMRP results in Fragile X Syndrome. FMRP binds brain mRNAs and inhibits polypeptide elongation. Using ribosome profiling of the hippocampus, we find that ribosome footprint levels in Fmr1-deficient tissue mostly reflect changes in RNA abundance. Profiling over a time course of ribosome runoff in wildtype tissue reveals a wide range of ribosome translocation rates; on many mRNAs, the ribosomes are stalled. Sucrose gradient ultracentrifugation of hippocampal slices after ribosome runoff reveals that FMRP co-sediments with stalled ribosomes; and its loss results in decline of ribosome stalling on specific mRNAs. One such mRNA encodes SETD2, a lysine methyltransferase that catalyzes H3K36me3. ChIP-Seq demonstrates that loss of FMRP alters the deployment of this epigenetic mark on chromatin. H3K36me3 is associated with alternative pre-RNA processing, which we find occurs in an FMRP-dependent manner on transcripts linked to neural function and autism spectrum disorders.
2020-03-31 | GSE143332 | GEO
Project description:Silencing of FMR1 and loss of its gene product FMRP results in Fragile X Syndrome. FMRP binds brain mRNAs and inhibits polypeptide elongation. Using ribosome profiling of the hippocampus, we find that ribosome footprint levels in Fmr1-deficient tissue mostly reflect changes in RNA abundance. Profiling over a time course of ribosome runoff in wildtype tissue reveals a wide range of ribosome translocation rates; on many mRNAs, the ribosomes are stalled. Sucrose gradient ultracentrifugation of hippocampal slices after ribosome runoff reveals that FMRP co-sediments with stalled ribosomes; and its loss results in decline of ribosome stalling on specific mRNAs. One such mRNA encodes SETD2, a lysine methyltransferase that catalyzes H3K36me3. ChIP-Seq demonstrates that loss of FMRP alters the deployment of this epigenetic mark on chromatin. H3K36me3 is associated with alternative pre-RNA processing, which we find occurs in an FMRP-dependent manner on transcripts linked to neural function and autism spectrum disorders.
2020-03-31 | GSE143331 | GEO
Project description:Silencing of FMR1 and loss of its gene product FMRP results in Fragile X Syndrome. FMRP binds brain mRNAs and inhibits polypeptide elongation. Using ribosome profiling of the hippocampus, we find that ribosome footprint levels in Fmr1-deficient tissue mostly reflect changes in RNA abundance. Profiling over a time course of ribosome runoff in wildtype tissue reveals a wide range of ribosome translocation rates; on many mRNAs, the ribosomes are stalled. Sucrose gradient ultracentrifugation of hippocampal slices after ribosome runoff reveals that FMRP co-sediments with stalled ribosomes; and its loss results in decline of ribosome stalling on specific mRNAs. One such mRNA encodes SETD2, a lysine methyltransferase that catalyzes H3K36me3. ChIP-Seq demonstrates that loss of FMRP alters the deployment of this epigenetic mark on chromatin. H3K36me3 is associated with alternative pre-RNA processing, which we find occurs in an FMRP-dependent manner on transcripts linked to neural function and autism spectrum disorders.
2020-03-31 | GSE143330 | GEO