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Expression data from host cells infected with different strains of Toxoplasma gondii

ABSTRACT: This SuperSeries is composed of the following subset Series: GSE25468: Expression data from Human foreskin fibroblasts (HFFs) infected with Toxoplasma gondii. GSE25469: Expression data from WT or p65-/- mouse embryonic fibroblasts (MEFs) infected with Toxoplasma gondii. Refer to individual Series

ORGANISM(S): Mus musculus

SUBMITTER: Emily Rosowski

PROVIDER: E-GEOD-25476 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Strain-specific activation of the NF-kappaB pathway by GRA15, a novel Toxoplasma gondii dense granule protein.

Rosowski Emily E EE Lu Diana D Julien Lindsay L Rodda Lauren L Gaiser Rogier A RA Jensen Kirk D C KD Saeij Jeroen P J JP

The Journal of experimental medicine 20110103 1

NF-κB is an integral component of the immune response to Toxoplasma gondii. Although evidence exists that T. gondii can directly modulate the NF-κB pathway, the parasite-derived effectors involved are unknown. We determined that type II strains of T. gondii activate more NF-κB than type I or type III strains, and using forward genetics we found that this difference is a result of the polymorphic protein GRA15, a novel dense granule protein which T. gondii secretes into the host cell upon invasio ...[more]

PMID: 21199955

Similar Datasets

Expression data from Human foreskin fibroblasts (HFFs) infected with Toxoplasma gondii.

Project description:Toxoplasma strains have been shown to modulate host cell transcription. We have found a type II Toxoplasma gene, GRA15, which activates the nuclear translocation of the NF-kappaB p65 transcription factor. We used microarrays to determine how GRA15II modulates host cell transcription. HFFs were infected with type I (RH), type I GRA15II (RH GRA15II), type II (Pru), type II GRA15KO (Pru GRA15KO), type III (cep), or type III GRA15II (cep GRA15II) parasites for 18-24 hours. Some samples were also stimulated with TNF-alpha. Total RNA was isolated and hybridized to Affymetrix GeneChip Human Genome U133A 2.0 arrays.

2011-01-10 | E-GEOD-25468 | biostudies-arrayexpress

Parasite gene expression differences between RH-ERP, RH-JSR and GT1 of Toxoplasma gondii.

Project description:Parasite gene expression differences have been reported previously between RH-ERP, RH-JSR and GT1. To independently confirm these gene expression differences, we examined the parasite gene expression profiles of RH-ERP, RH-JSR and GT1 through microarray. Three type I strains of Toxoplasma gondii were compared with one array each, and these were used to verify data from previous studies.

2013-08-20 | E-GEOD-44191 | biostudies-arrayexpress

Expression data from human foreskin fibroblasts (HFFs) infected with type I strains of Toxoplasma gondii.

Project description:Type I strains of Toxoplasma gondii exhibit phenotypic variation, but it is uncertain how differently type I strains modulate the host cell. We determined differential host modulation by type I strains through microarray. HFFs were infected with RH-ERP, RH-JSR and GT1 for 24 hours. Total RNA was isolated and hybridized to Affymetrix GeneChip Human Genome U133A 2.0 arrays.

2013-08-20 | E-GEOD-44189 | biostudies-arrayexpress

Expression data from WT or p65-/- mouse embryonic fibroblasts (MEFs) infected with Toxoplasma gondii.

Project description:Toxoplasma strains have been shown to modulate host cell transcription. We have found a type II Toxoplasma gene, GRA15, which activates the nuclear translocation of the NF-kappaB p65 transcription factor. We used microarrays to determine how GRA15II modulates host cell transcription, and whether this transcription is dependent on the p65 transcription factor. WT or p65-/- MEFs were infected with type I (RH), type I GRA15II (RH GRA15II), type II (Pru), or type II GRA15KO (Pru GRA15KO) parasites for 18-24 hours. Total RNA was isolated and hybridized to Affymetrix GeneChip Human Genome U133A 2.0 arrays.

2011-01-10 | E-GEOD-25469 | biostudies-arrayexpress

Expression data from RAW264.7 murine macrophages infected with Toxoplasma gondii and subsequently stimulated with interferon-gamma

Project description:Toxoplasma strains are known to inhibit the expression of several interferon-gamma induced genes, and a type II strain was shown to dysregulate genome-wide responses to interferon-gamma in human fibroblasts (Kim et al., 2007, J Immunol.). In this study we aimed to determine the effect of infection with three clonal lineages of Toxoplasma, type I, II, and III strains on genome-wide interferon-gamma induced transcription in murine macrophages. We also assessed the effect of the two main Toxoplasma modulators of mouse macrophage transcription, ROP16 and GRA15 (Jensen et al., 2011, Cell Host Microbe). We used Affymetrix microarrays to analyze host cell transcription after Toxoplasma infection and interferon-gamma stimulation. RAW264.7 murine macrophages were left uninfected or infected with type I (RH), type I ?rop16 (RH ?rop16), type II (Pru), type II ?gra15 (Pru ?gra15), or type II (CEP) parasites at an MOI ~5 for 18 hours and subsequently stimulated with murine IFN-? for six hours. Plaque assays were done to assess parasite viability. Total RNA was isolated and hybridized to Affymetrix Mouse 430A 2.0 gene chips.

2013-02-19 | E-GEOD-34913 | biostudies-arrayexpress

Human foreskin fibroblasts (HFFs) infected with type I strains of Toxoplasma gondii

Project description:This SuperSeries is composed of the SubSeries listed below. Refer to individual Series

2013-08-20 | E-GEOD-44246 | biostudies-arrayexpress

Expression data from cyclohexamide treated Human Foreskin Fibroblasts (HFFs) infected with type I Toxoplasma gondii and stimulated with interferon gamma.

Project description:Pre-infection with Toxoplasma parasites inhibits induction of an interferon gamma responsive gene expression program. In this study we aimed to determine what role host negative regulatory proteins that are induced by Toxoplasma infection, such as SOCS-1, have in this inhibition. We used Affymetrix microarrays to analyze host cell transcription after pre-treatment with the protein synthesis inhibitor cyclohexamide (CHX), Toxoplasma infection, and subsequent interferon-gamma stimulation. Human foreskin fibroblasts (HFFs) were left untreated or treated with CHX for 40min. Cells were infected, or not, with type I (RH) Toxoplasma parasites, for one hour, and subsequently stimulated with human IFN-γ for one hour. Total RNA was isolated and hybridized to Affymetrix Human U133A 2.0 gene chips.

2015-08-01 | E-GEOD-34916 | biostudies-arrayexpress

Transcription profiling by array of human foreskin fibroblasts infected with different Toxoplasma gondii strains

Project description:Effect of different Toxoplasma gondii strains on human foreskin fibroblast gene expression

2007-01-18 | E-MEXP-783 | biostudies-arrayexpress

An aspartyl protease defines a novel pathway for export of Toxoplasma proteins into the host cell

Project description:Toxoplasma gondii is an obligate intracellular Apicomplexan parasite capable of invading and surviving within nucleated cells in most warm-blooded animals. This remarkable task is achieved through the delivery of effector proteins from the parasite into the parasitophorous vacuole and host cell cytosol that rewire host cellular pathways, facilitating parasite evasion of the immune system. Here, we have identified a novel export pathway in Toxoplasma that involves cleavage of effector proteins by the Golgi-resident aspartyl protease 5 (ASP5) prior to translocation into the host cell. We demonstrate that ASP5 cleaves a highly constrained amino acid motif that has some similarity to the PEXEL motif of Plasmodium parasites. We show that ASP5 can mature effectors at both the N- and C-terminal ends of proteins and is also required for the trafficking of proteins without this motif. Furthermore, we show that ASP5 controls establishment of the nanotubular network and is required for the efficient recruitment of host mitochondria to the parasitophorous vacuole membrane. Global assessment of host gene expression following infection reveals that ASP5-dependent pathways influence thousands of the transcriptional changes that Toxoplasma imparts on its host cell. This work characterizes the first identified machinery required for export of Toxoplasma effectors into the infected host cell. Three groups of human foreskin fibroblasts are compared. Each group has 3 replicates giving a total of 9 samples. The first group of samples are infected with wild type (GRA16HA) Toxoplasma gondii, the second group with Asp5 knock-out Toxoplasma gondii, and the final group remain uninfected. All fibroblasts are generated from one donor sample.

2015-11-19 | E-GEOD-73986 | biostudies-arrayexpress

Expression and genomic hybridization data for the Toxoplasma gondii I X III cross

Project description:This SuperSeries is composed of the following subset Series: GSE26558: Expression Quantitative Trait Locus (eQTL) Mapping of Stage-specific Gene Expression in Progeny from a type I X III Genetic Cross of Toxoplasma gondii GSE26607: Genomic hybridizations for the parents and progeny of the Toxoplasma gondii I X III genetic cross Refer to individual Series

2012-01-11 | E-GEOD-26608 | biostudies-arrayexpress

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