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Title: Expression data from the starved first larval stage (L1) C. elegans animals that were incubated in S-basal buffer for 30 hours after bleaching      
dateReleased:
05-16-2014
description:
How animals coordinate gene expression in response to starvation is an outstanding problem closely linked to aging, obesity, and cancer. Newly hatched Caenorhabditis elegans respond to food deprivation by halting development and promoting long-term survival (L1 diapause), thereby providing an excellent model to study starvation response. Through a genetic search, we have discovered that the tumor suppressor Rb critically promotes survival during L1 diapause and likely does so by regulating the expression of genes in both insulin-IGF-1 signaling (IIS)-dependent and -independent pathways mainly in neurons and the intestine. Global gene expression analyses suggested that Rb maintains the “starvation-induced transcriptome” and represses the “re-feeding induced transcriptome”, including the repression of many pathogen/toxin/oxidative stress-inducible and metabolic genes, as well as the activation of many other stress-resistant genes, mitochondrial respiratory chain genes, and potential IIS receptor antagonists. Notably, the majority of genes dysregulated in starved L1 Rb(-) animals were not found to be dysregulated in fed conditions. Together, these findings identify Rb as a critical regulator of the starvation response and suggest a link between functions of tumor suppressors and starvation survival. These results may provide mechanistic insights into why cancer cells are often hypersensitive to starvation treatment. Gravid C. elegans adult animals were bleached with hypochlorite and sodium hydroxide. The resulting eggs were hatched in 8–10 mL S-basal without cholesterol in 15-mL conical tubes, which were placed on an end-over-end rocker (VWR) at 20 °C. 30 hours later, starved L1s were collected for RNA preparations. Wild type and lin-35/Rb mutant were profiled in triplicate. All replicates were biological replicates.
privacy:
not applicable
aggregation:
instance of dataset
ID:
E-GEOD-45651
refinement:
raw
alternateIdentifiers:
45651
keywords:
functional genomics
dateModified:
06-03-2014
availability:
available
types:
gene expression
name:
Caenorhabditis elegans
ID:
A-AFFY-60
name:
Affymetrix GeneChip C. elegans Genome Array [Celegans]
accessURL: https://www.ebi.ac.uk/arrayexpress/files/E-GEOD-45651/E-GEOD-45651.raw.1.zip
storedIn:
ArrayExpress
qualifier:
gzip compressed
format:
TXT
accessType:
download
authentication:
none
authorization:
none
accessURL: https://www.ebi.ac.uk/arrayexpress/files/E-GEOD-45651/E-GEOD-45651.processed.1.zip
storedIn:
ArrayExpress
qualifier:
gzip compressed
format:
TXT
accessType:
download
authentication:
none
authorization:
none
accessURL: https://www.ncbi.nlm.nih.gov/geo/query/acc.cgi?acc=GSE45651
storedIn:
Gene Expression Omnibus
qualifier:
not compressed
format:
HTML
accessType:
landing page
primary:
true
authentication:
none
authorization:
none
abbreviation:
EBI
homePage: http://www.ebi.ac.uk/
ID:
SCR:004727
name:
European Bioinformatics Institute
homePage: https://www.ebi.ac.uk/arrayexpress/
ID:
SCR:002964
name:
ArrayExpress
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