Oxidative Stress 30-min interval
Ontology highlight
ABSTRACT:
ORGANISM(S): Saccharomyces cerevisiae
PROVIDER: GSE3683 | GEO | 2005/12/01
SECONDARY ACCESSION(S): PRJNA93823
REPOSITORIES: GEO
Similar Datasets
Project description:Determine if yeast cells in stationary-phase cultures respond to oxidative stress Keywords: Time-course
2005-12-01 | GSE3688 | GEO
Project description:Determine if yeast cell in stationary-phase cultures respond to oxidative stress Yeast cells in stationary-phase cultures were exposed to oxidative stress with samples harvested every 30-minutes over 8 hours. All experimental samples are over an common reference. There are two replicates for each time point and six replicates of T0.
2010-06-30 | E-GEOD-3683 | biostudies-arrayexpress
Project description:Determine if yeast cells in stationary-phase cultures respond to oxidative stress Yeast cells in stationary-phase cultures were exposed to oxidative stress with samples harvested every 1-minute over 35 minutes, with a final time point at 60 minutes. All experimental samples are over an common reference. There are two replicates for each time point and six replicates of T0.
2010-06-30 | E-GEOD-3688 | biostudies-arrayexpress
Project description:Background: As carbon sources are exhausted, Saccharomyces cerevisiae cells exhibit reduced metabolic activity and cultures enter stationary phase. We asked whether cells in stationary-phase cultures respond to additional stress at the level of transcript abundance. Results: Microarrays were used to quantify changes in transcript abundance in cells from stationary-phase cultures. In response to oxidative stress, more than 800 mRNAs increased within 1 minute. A significant number of these mRNAs encode proteins involved in stress responses. We tested whether mRNA increases were due to new transcription, rapid poly-adenylation of message (which would not be detected by microarrays), or potential release of mature mRNA sequestered in the cell but insoluble during RNA isolation. Examination of the response to oxidative stress in an RNA polymerase II mutant, rpb1-1 suggested new transcription was not required. Quantitative RT-PCR analysis of a subset of these transcripts further suggested that essentially all isolated transcripts were polyadenylated. In contrast, over 1000 transcripts increased after protease treatment of cell-free lysates from stationary-phase but not exponentially growing cultures. We also determined that oxidative stress and temperature upshift led to the release of different transcripts, suggesting that mRNA release is stress specific. Conclusions: A large number of mRNAs are sequestered in a protease-labile, rapidly releasable form in cells in stationary-phase cultures but not exponentially growing cultures. The differences between mRNAs released by protease treatment and those observed with oxidative stress and temperature upshift, suggest different stresses cause the release of different transcripts. We hypothesize that P-bodies are involved in this sequestration. Keywords: stress response
2005-12-03 | GSE3729 | GEO
Project description:Determine if cells in stationary-phase cultures respond to increased temperature. Keywords: Time-course
2005-12-01 | GSE3687 | GEO
Project description:Oxidative stress is a harmful condition in a cell, tissue, or organ, caused by an imbalnace between reactive oxygen species and other oxidants and the capacity of antioxidant defense systems to remove them. The budding yeast S. cerevisiae has been the major eukaryotic model for studies of response to oxidative stress. We used microarrays to study the genome-wide temporal response of the yeast S. cerevisiae to oxidative stress induced by cumene hydroperoxide. Keywords: time course The effects of oxidative stress induced by CHP on the transcriptional profile of S. cerevisiae was studied from a dynamical perspective. Yeast cultures were grown in controlled batch conditions, in 1 L fermentors. Three replicate cultures in mid-exponential phase were exposed to 0.19 mM CHP, while three non-treated cultures were used as controls. Samples were collected at t=0 (immediately before adding CHP) and at 3, 6, 12 and 20 min after adding the oxidant. Samples were processed for RNA extraction and profiled using Affymetrix Yeast Genome S98 arrays.
2013-12-17 | E-GEOD-26169 | biostudies-arrayexpress
Project description:Oxidative stress caused by Menadione or Hydrogen peroxide in synchronized Saccharomyces cerevisiae cultures. Alpha factor synchronized cultures (0.2-0.4 OD), treated at the beginning of S phase (25 min after release from G1 arrest) with either 2 mM Menadione (MD) or 0.24 mM Hydrogen peroxide (HP), show cell cycle effects. Cells treated with MD arrested at G1. Cells treated with HP delayed at S and then, after removal of HP at 135 minutes , continued the cell cycle, only to arrest at G2/M. Growth was carried out in 30C with shaking (295 rpm). Two time course experiments were performed with each oxidative stress agent, designated as H2O2 and H2O2_II, MD and MD_II. Keywords = oxidative stress Keywords = menadione Keywords = hydrogen peroxide Keywords = time course Keywords = cell cycle Keywords = yeast Keywords: other
2005-02-04 | GSE2239 | GEO
Project description:Oxidative stress in stationary-phase cultures
| PRJNA93889 | ENA
Project description:Oxidative stress caused by Menadione or Hydrogen peroxide in synchronized Saccharomyces cerevisiae cultures. Alpha factor synchronized cultures (0.2-0.4 OD), treated at the beginning of S phase (25 min after release from G1 arrest) with either 2 mM Menadione (MD) or 0.24 mM Hydrogen peroxide (HP), show cell cycle effects. Cells treated with MD arrested at G1. Cells treated with HP delayed at S and then, after removal of HP at 135 minutes , continued the cell cycle, only to arrest at G2/M. Growth was carried out in 30C with shaking (295 rpm). Two time course experiments were performed with each oxidative stress agent, designated as H2O2 and H2O2_II, MD and MD_II. Keywords = oxidative stress Keywords = menadione Keywords = hydrogen peroxide Keywords = time course Keywords = cell cycle Keywords = yeast
2005-02-04 | E-GEOD-2239 | biostudies-arrayexpress
Project description:Determine if cells in stationary-phase cultures respond to increased temperature. Yeast cells in stationary-phase cultures were exposed to temperature upshift (30C to 39C) with samples harvested every 30-minutes over 8 hours. All experimental samples are over an common reference. There are two replicates for each time point and six replicates of T0.
2010-06-30 | E-GEOD-3687 | biostudies-arrayexpress