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Series GSE8302 Query DataSets for GSE8302
Status Public on Jul 24, 2007
Title Comprehensive analysis of PPARα-dependent regulation of hepatic lipid metabolism by expression profiling - 5
Organisms Homo sapiens; Mus musculus; Rattus norvegicus
Experiment type Expression profiling by array
Summary PPARα is a ligand-activated transcription factor involved in the regulation of nutrient metabolism and inflammation. Although much is already known about the function of PPARα in hepatic lipid metabolism, many PPARα-dependent pathways and genes have yet to be discovered. In order to obtain an overview of PPARα-regulated genes relevant to lipid metabolism, and to probe for novel candidate PPARα target genes, livers from several animal studies in which PPARα was activated and/or disabled were analyzed by Affymetrix GeneChips. Numerous novel PPARα-regulated genes relevant to lipid metabolism were identified. Out of this set of genes, eight genes were singled out for study of PPARα-dependent regulation in mouse liver and in mouse, rat, and human primary hepatocytes, including thioredoxin interacting protein (Txnip), electron-transferring-flavoprotein β polypeptide (Etfb), electron-transferring-flavoprotein dehydrogenase (Etfdh), phosphatidylcholine transfer protein (Pctp), endothelial lipase (EL, Lipg), adipose triglyceride lipase (Pnpla2), hormone-sensitive lipase (Lipe), and monoglyceride lipase (Mgll). Using an in silico screening approach, one or more PPAR response elements (PPREs) were identified in each of these genes. Since Pnpla2, Lipe, and Mgll contribute to hepatic triglyceride hydrolysis, gene regulation was studied under conditions of elevated hepatic lipids. In wild-type mice fed a high fat diet, the decrease in hepatic lipids following treatment with the PPARα agonist Wy14643 was paralleled by significant up-regulation of Pnpla2, Lipe, and Mgll, suggesting that induction of triglyceride hydrolysis may contribute to the anti-steatotic role of PPARα. Our study illustrates the power of transcriptional profiling to uncover novel PPARα-regulated genes and pathways in liver.
Keywords: identification of target genes
 
Overall design Primary rat and mouse hepatocytes were incubated in the presence (10 uM) or absence of the synthetic PPARα ligand Wy14643 for 24 hours. Primary human hepatocytes were incubated in the presence (50 uM) or absence of Wy14643 for 12 hours. Total RNA was pooled within groups and hybridized onto Rat Genome 230 2.0 Arrays, Mouse Genome 430 2.0 Arrays or Human Genome U133 Plus 2.0 Arrays.
 
Contributor(s) Rakhshandehroo M, Sanderson LM, Matilainen M, Stienstra R, Carlberg C, de Groot PJ, Muller M, Kersten S
Citation(s) 18288265
Submission date Jun 26, 2007
Last update date Mar 25, 2019
Contact name Guido Hooiveld
E-mail(s) guido.hooiveld@wur.nl
Organization name Wageningen University
Department Div. Human Nutrition & Health
Lab Nutrition, Metabolism & Genomics Group
Street address HELIX, Stippeneng 4
City Wageningen
ZIP/Postal code NL-6708WE
Country Netherlands
 
Platforms (3)
GPL570 [HG-U133_Plus_2] Affymetrix Human Genome U133 Plus 2.0 Array
GPL1261 [Mouse430_2] Affymetrix Mouse Genome 430 2.0 Array
GPL1355 [Rat230_2] Affymetrix Rat Genome 230 2.0 Array
Samples (6)
GSM205896 mouse_hepatocytes_control_pooled
GSM205897 mouse_hepatocytes_WY24h_pooled
GSM205898 rat_hepatocytes_control_pooled
This SubSeries is part of SuperSeries:
GSE8316 Comprehensive analysis of PPARa-dependent regulation of hepatic lipid metabolism by expression profiling
Relations
BioProject PRJNA105443

Download family Format
SOFT formatted family file(s) SOFTHelp
MINiML formatted family file(s) MINiMLHelp
Series Matrix File(s) TXTHelp

Supplementary file Size Download File type/resource
GSE8302_RAW.tar 20.4 Mb (http)(custom) TAR (of CEL)
Raw data provided as supplementary file
Processed data included within Sample table

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