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Infection with bradyzoites has a diminished impact on host transcript levels relative to tachyzoite infection.

ABSTRACT: 5 arrays per condition (covering 3 biological replicate experiments) were performed on Human Foreskin Fibroblasts (HFFs) at 44 hours post infection. The four experimental conditions include uninfected "standard", uninfected "stress", tachyzoite-infected "standard+TZ", and bradyzoite-infected "stress+BZ". Bradyzoite conversion is induced at 4 hours post infection with replacement of standard DMEM+10% FCS with RPMI+1%FCS buffered with 50mM Hepes to pH 8.15. Approximately 20% of cells are infected and bradyzoite conversion is >90% in these experiments. These data are normalized using 2-D loess (span factor .4). The calculations in the manuscript are based on are log2 ratios of normalized channel 2/channel 1 medians. A development or differentiation experiment design type assays events associated with development or differentiation or moving through a life cycle. Development applies to organism(s) acquiring a mature state, and differentiation applies to cells acquiring specialized functions. Developmental Stage: Uninfected (standard or stress medium), or Tachyzoite-infected (standard medium) or Bradyzoite-infected (stress medium) Keywords: development_or_differentiation_design

ORGANISM(S): Homo sapiens

PROVIDER: GSE8773 | GEO | 2007/08/15

SECONDARY ACCESSION(S): PRJNA102061

REPOSITORIES: GEO

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Infection with bradyzoites has a diminished impact on host transcript levels relative to tachyzoite infection.

Project description:5 arrays per condition (covering 3 biological replicate experiments) were performed on Human Foreskin Fibroblasts (HFFs) at 44 hours post infection. The four experimental conditions include uninfected "standard", uninfected "stress", tachyzoite-infected "standard+TZ", and bradyzoite-infected "stress+BZ". Bradyzoite conversion is induced at 4 hours post infection with replacement of standard DMEM+10% FCS with RPMI+1%FCS buffered with 50mM Hepes to pH 8.15. Approximately 20% of cells are infected and bradyzoite conversion is >90% in these experiments. These data are normalized using 2-D loess (span factor .4). The calculations in the manuscript are based on are log2 ratios of normalized channel 2/channel 1 medians. A development or differentiation experiment design type assays events associated with development or differentiation or moving through a life cycle. Development applies to organism(s) acquiring a mature state, and differentiation applies to cells acquiring specialized functions. Developmental Stage: Uninfected (standard or stress medium), or Tachyzoite-infected (standard medium) or Bradyzoite-infected (stress medium) Complex

2007-08-15 | E-GEOD-8773 | biostudies-arrayexpress

Transcription profiling of human foreskin fibroblasts infected with Toxoplasma gondii under stress and tachyzoite or bradyzoite conditions at 44 h post infection

2006-12-10 | E-SMDB-3773 | biostudies-arrayexpress

Synthesis vs. Abundance, Bradyzoite Development

Project description:Parasites grown as either tachyzoites or bradyzoites for 40 hours were pulsed with 2,4-dithiouracil (DTU) for 1 hour. Following the pulse, mRNA was extracted and either used directly in microarray experiments (Abundance Arrays) or biotinylated and purified to select DTU labeled RNAs that were then used in microarray experiments (Synthesis Arrays). Two independent tachyzoite and bradyzoite preparations were made and duplicate microarrays were performed for each sample. A development or differentiation experiment design type assays events associated with development or differentiation or moving through a life cycle. Development applies to organism(s) acquiring a mature state, and differentiation applies to cells acquiring specialized functions. User Defined

2005-07-16 | E-GEOD-2946 | biostudies-arrayexpress

Synthesis vs. Abundance, Bradyzoite Development

2005-07-16 | GSE2946 | GEO

RNA sequencing of host transcriptome of human foreskin fibroblast cells infected with either bradyzoites and tachyzoite of Toxoplasma gondii

Project description:The purpose of this data set is to determine if bradyzoites impact the host transcripton in a similar manner as tachyzoites. We found that 3853 differentially expressed genes (DEGs) are shared between tachyzoite infected cells and bradyzoite infected cells (41%; 2161 up-reg., 1692 down-reg.) when compared to uninfected host samples, leaving 3356 tachyzoite specific DEGs (1488 up-reg., 1868 down-reg.), and 1951 DEGs specific to bradyzoite infection (1075 up-reg., 876 down-reg). We conclude therefore that bradyzoites manipulate the host cell and that this is unique when compared to tachyzoites.

2020-01-15 | GSE125121 | GEO

Phosphoproteome upon Salmonella infection

Project description:HCT116 cells were grown in SILAC-DMEM (arginine and lysine-free medium), supplemented with dialyzed FCS (10%) and lysine [74µg/ml] and arginine [42µg/ml] as “light K0, R0”, “medium K4, R6” or “heavy K8, R10”. Cells were left uninfected or infected with Salmonella and lysed 30 min or 2h post-infection.

2021-05-06 | PXD023703 | Pride

Toxoplasma gondii

Project description:Tachyzoite to bradyzoite differentiation

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Toxoplasma gondii

Project description:Tachyzoite to bradyzoite differentiation.

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72hr Toxoplasma gondii bradyzoite induction

Project description:Two samples, 0hr and 72hr, were used to generate tachyzoite and bradyzoite transcriptional data from tissue-cultured Toxoplasma gondii strain Prugniaud, respectively.

2010-06-15 | GSE22258 | GEO

Transcriptome analysis of oocyst, tachyzoite, and bradyzoite development in the type II Toxoplasma gondii strain M4.

Project description:There were three primary objectives to the overall experiment. I. Describe the transcriptome of the oocyst through its development beginning with the freshly excreted, unsporulated oocyst at “Day 0” to a fully sporulated and mature oocyst at “Day 10” and including a mid-sporulation timepoint at “Day 4”. II. Compare the transcriptomes of in vitro vs. in vivo derived bradyzoites. III. Compare expression data from three life stages (oocyst, bradyzoite and tachyzoite) from the same parasite isolate, M4, which has been been characterized as a Type II strain. Each array represents seperately isolated and processed RNA samples. (Two samples per time point/developmental stage) RNA samples were obtained from: 1. Oocysts harvested from kitten feces and purified for RNA extraction at Day 0, (not sporulated), Day 4 post-induction of sporulation (mid-sporulation) and Day 10 post-induction of sporulation (fully sporulated). Oocysts were collected and combined from two kittens that were infected with the same starting material (mouse brains containing bradyzoite cysts of the same parasite strain). Duplicate samples were obtained from feces collected and purified on separate days. 2. Bradyzoite cysts harvested from the brains of mice that were infected with oocysts from the same strain (obtained from the oocysts harvested from kittens as described for the oocyst RNA). Mice were treated with 0.44 µg/ml sulfadiazine in their water days 11-21 pi. Mice were sacrificed on day 21 for cyst purification. 3. In vitro 4 and 8 dpi bradyzoite and 2 dpi tachyzoite samples are from separately infected cultures of human foreskin fibroblasts (HFFs) (replicates were infected on the same day). The parasites used for the initial infections were derived from the same culture. Samples were harvested independently and kept separate for all the subsequent processing and labeling steps.

2011-09-30 | E-GEOD-32427 | biostudies-arrayexpress

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