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Metabolomics,Unknown,Transcriptomics,Genomics,Proteomics

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Impact of beta-arrestin-2 deficiency on intestinal tumorigenesis in Apc-mutated mice

ABSTRACT: This SuperSeries is composed of the following subset Series: GSE24575: Beta-arrestin-2 deficiency effect on intestinal tumorigenesis in Apc-mutated mice GSE24576: Gene expression analysis of tumors from ApcD14/+ mice Refer to individual Series

ORGANISM(S): Mus musculus

SUBMITTER: Caroline Bonnans

PROVIDER: E-GEOD-24577 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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beta-arrestin-2 deficiency effect on intestinal tumorigenesis in Apc-mutated mice

Project description:Amoung their pleiotropic functions, a role was recently assigned for b-arrestin scaffold proteins in tumor growth, angiogenesis and invasion. In order to elucidate the roles of b-arrestins in tumour developement in intestinal epithelium initiated by Apc mutation, we determined the effects of b-arrestin gene deletion on intestinal polypolis using ApcD14/+ mice, a relevant mouse model of human intestinal tumorigenesis.Here we show that unlike b-arrestin1, absence of b-arrestin2 dramatically decreased the number of spontaneously developping intestinal tumors in ApcD14/+ mice.The size of residual tumors was similarto that of controls, suggesting that their growth is b-arrestin2-independent. This result demonstrated a role for b-arrestin2 in the early development of a tumor subset. Gene expression profils analysis of ApcD14/+:Arrb2+/+ and ApcD14/+:Arrb2-/- tumors showed two distinct clusters among ApcD14/+:Arrb2+/+ tumors and one of them was statistically more correlated to ApcD14/+:Arrb2-/- tumors than to the other ApcD14/+:Arrb2+/+ cluster, eventhough a number of genes saw their expression affected in ApcD14/+:Arrb2-/- tumors only. Altogether, our data unravel an unexpected early diversity among intestinal tumors and a crucial role for b-arrestin2 in early tumor development in Apc-mutated mice. 16 tumors from ApcD14/+:Arrb2+/+ mice and 13 tumors from ApcD14/+:Arrb2-/- mice

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Impact of beta-arrestin-2 deficiency on intestinal tumorigenesis in Apc-mutated mice

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