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Omics score: 0

E-GEOD-51108

ABSTRACT: Gene expression in liver tissue from Ghrh-KO and normal (wild-type) mice

OTHER RELATED OMICS DATASETS IN: PRJNA221203

PROVIDER: E-GEOD-51108 | ExpressionAtlas | 2015-07-27

REPOSITORIES: ExpressionAtlas

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			Action	DRS
	E-GEOD-51108-analysis-methods.tsv	Tabular
	E-GEOD-51108-atlasExperimentSummary.Rdata	Rdata
	E-GEOD-51108-configuration.xml	Xml
	E-GEOD-51108-percentile-ranks.tsv	Tabular
	E-GEOD-51108.condensed-sdrf.tsv	Tabular

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Gene expression in liver tissue from Ghrh-KO and normal (wild-type) mice

Project description:The hypothalamus has recently emerged as a key regulator of metabolism and aging in mammals. We have examined the impact of targeted disruption of hypothalamic hypophysiotropic peptide: Growth Hormone-releasing Hormone (GHRH) in mice on longevity, and the putative mechanisms of delayed aging. GHRH knockout (KO) mice are remarkably long-lived and in comparison to genetically normal (wild type) animals exhibiting major shifts in the expression of genes related to xenobiotic detoxification, stress resistance, and insulin signaling. These mutant mice also have increased adiponectin levels and alterations in glucose homeostasis consistent with the removal of the counter-insulin effects of GH. While these effects overlap with those of caloric restriction (CR), we show that effects of CR and the GHRH mutation are additive, with lifespan of GHRH-KO mutants further increased by CR. We conclude that GHRH-KO mice feature perturbations in a network of signaling pathways related to stress resistance, metabolic control and inflammation, and therefore provide a new model that can be used to explore links between GHRH repression, downregulation of the somatotropic axis, and extended longevity. Hepatic tissue was obtained from 3 Ghrh-KO mice and 3 control (wild-type) mice (males). Expression in each sample was profiled using Affymetrix Mouse Genome 430 2.0 arrays.

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