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E-GEOD-15293

ABSTRACT: Gene expression profiling of temporal lobes of wfs1 deficient mice in two different genetic background

OTHER RELATED OMICS DATASETS IN: PRJNA116583

PROVIDER: E-GEOD-15293 | ExpressionAtlas | 2015-09-02

REPOSITORIES: ExpressionAtlas

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			Action	DRS
	E-GEOD-15293-analysis-methods.tsv	Tabular
	E-GEOD-15293-atlasExperimentSummary.Rdata	Rdata
	E-GEOD-15293-configuration.xml	Xml
	E-GEOD-15293-percentile-ranks.tsv	Tabular
	E-GEOD-15293.condensed-sdrf.tsv	Tabular

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Project description:Deletion of the glycerol channel aquaporin-9 (Aqp9) reduces postprandial blood glucose levels in leptin receptor deficient (db/db) obese mice on a C57BL/6×C57BLKS mixed genetic background. Furthermore, shRNA mediated reduction of Aqp9 expression reduces liver triacylglycerol (TAG) accumulation in a diet induced rat model of obesity. The aim of this study was to investigate metabolic effects of Aqp9 deletion in coisogenic db/db mice of the C57BL/6 background. Aqp9wt db/db and Aqp9-/- db/db mice did not differ in body weight and liver TAG contents. On the C57BL/6 genetic background we observed elevated plasma glucose in Aqp9-/- db/db mice (+ 1.1 mM, life-time average) while plasma insulin concentration was reduced at time of death. Glucose levels changed similarly in pentobarbital anesthetized, glucagon challenged Aqp9wt db/db and Aqp9-/- db/db mice. Liver transcriptional profiling did not detect differential gene expression between genotypes. Metabolite profiling revealed a sex independent increase in plasma glycerol (+55%), glucose (+24%) and reduction in threonate (all at q<0.1) in Aqp9-/- db/db mice compared to controls. Metabolite profiling thus confirms a role of AQP9 in glycerol metabolism of obese C57BL/6 db/db mice. In this animal model of obesity Aqp9 gene deletion elevates plasma glucose and does not alleviate hepatosteatosis.

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Project description:Gene expression profiling of temporal lobes of wfs1 deficient mice

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Gene expression profiling of temporal lobes of wfs1 deficient mice

Project description:Aim of present study was to describe the changes induced deletion of the Wfs1 gene in the temporal lobe of mice. Mutant mice were backcrossed to two different genomic backgrounds in order to exclude confounding foreign genomic background influence. Samples from temporal lobes were analyzed by using Affymetrix Genechips, expression profiles were functionally annotated by using GSEA and Ingenuity Pathway Analysis. We found that Wfs1 mutant mice are significantly smaller (20.9 +/- 1.6 g) than their wild-type counterparts (31.0 +/- 0.6 g, p < 0.0001). Interestingly, genechip analysis identified growth hormone transcripts up-regulated and functional analysis found appropriate pathways activated. Moreover, we found significant increase in the level of IGF1 in the plasma of wfs1 mutant mice. Taken together, wfs1 mutation induces growth retardation whereas the growth hormone pathway is activated. Further studies are needed to describe biochemical and molecular details of the growth hormone axis in the wfs1 mutant mice. 37 samples, two genotypes (wild type and mutant), in two different genetic background (C57B6 and 129S6)

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Hypothalamic gene expression profile indicates a reduction in G-protein signaling in the wfs1 mutant mice

Project description:WFS1 gene is coding protein with unknown function but its functional deficiency causes different neuropsychiatric and neuroendocrine syndromes. In the present study we aimed to find the functional networks influenced by the Wfs1 deficiency in the hypothalamus. We performed gene expression profiling (Mouse Gene 1.0 ST Arrays) in Wfs1 deficient mice (ko). Modified t-statistics was used for comparison of groups (wt vs ko). Functional annotation of the alterations in RNA levels was performed with Ingenuity Pathway Analysis. 305 genes were differentially expressed with nominal p-value less than 0.01. FDR adjusted p-values were significant (0.007) only for two genes M-bM-^@M-^S C4b (t=9.66) and Wfs1 (t=-9.03). However, several genes related to the G-protein signalling were very close to the FDR adjusted significance. For instance, Rgs4 (regulator of G-protein signalling 4) was down-regulated (-0.34, t=-5.4) in Wfs1 deficient mice. Changes in Rgs4 and C4B expression were confirmed by QRT-PCR. In humans, Rgs4 is in the locus for bipolar disease (BPD) and its expression is down-regulated in BPD. C4b is the gene related to the neurodegenerative diseases. In conclusion, hypothalamic gene expression profiling indicates alterations in some functionally relevant molecular pathways explaining the clinical syndrome in the Wolfram syndrome patients. 18 samples, two genotypes (wild type and mutant), in 129S6 genetic background

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