Metabolomics,Unknown,Transcriptomics,Genomics,Proteomics

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Transcription profiling of rat arteries from animals with salt induced hypertensive disease results in over expression of matricellular genes in cerebral arteries


ABSTRACT: The Dahl salt-sensitive (S) rat model develops chronic hypertensive disease when fed a high salt diet that ultimately results in renal and heart failure, as well as prevalent cerebrovascular pathologies. Phenotypic changes in the cerebral vasculature are preceded by changes in gene expression, and evidence supports a role for extracellular signal-regulated kinase 1/2 (ERK1/2) in vascular cell proliferation, yet little is known regarding ERK1/2 –regulated gene transcription in cerebrovascular smooth muscle during hypertension. Findings presented here support the hypothesis that salt-induced hypertensive disease results in upregulation of ERK1/2 activity and ERK1/2-regulated genes that promote remodeling in cerebral resistance arteries. Dahl S rats were fed either a 0.4% NaCl (low salt, LS) or 8% NaCl (high salt, HS) diet until evidence of left ventricular dysfunction. Gene expression profiling using oligonucleotide array analysis detected a significant fold-change of 1.5 or greater in 133 out of 15,923 genes examined. Mitogen-activated protein kinase (MAPK)-regulated genes were overrepresented and provided a link to genes involved in proliferation and extracellular matrix signaling including plasminogen activator inhibitor I (PAI-1), osteopontin (OPN) and junB. These data suggests that salt induced hypertensive disease promotes hyperplasia and changes in matricellular genes that are likely important in vascular remodeling. Experiment Overall Design: Analysis was based on a comparison between the Low Salt and High Salt groups. Arteries from 3 animals were pooled for each sample, thus there were 9 animals/group. Analysis of significance amongst all genes as well as prospective hypotheses correlating to disease were performed.

ORGANISM(S): Rattus norvegicus

SUBMITTER: Karen Lounsbury 

PROVIDER: E-GEOD-5488 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Publications

Genes overexpressed in cerebral arteries following salt-induced hypertensive disease are regulated by angiotensin II, JunB, and CREB.

Rose Patricia P   Bond Jeffrey J   Tighe Scott S   Toth Michael J MJ   Wellman Theresa L TL   Briso de Montiano Eva Maria EM   Lewinter Martin M MM   Lounsbury Karen M KM  

American journal of physiology. Heart and circulatory physiology 20071221 2


Although changes in gene expression are necessary for arterial remodeling during hypertension, the genes altered and their mechanisms of regulation remain uncertain. The goal of this study was to identify cerebral artery genes altered by hypertension and define signaling pathways important in their regulation. Intact cerebral arteries from Dahl salt-sensitive normotensive and hypertensive high-salt (HS) rats were examined by immunostaining, revealing an increased phosphorylation of extracellular  ...[more]

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