RSPO1 suppresses growth of mouse intestinal adenomas
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ABSTRACT:
PROVIDER: PRJNA609441 | ENA |
REPOSITORIES: ENA
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Project description:We constructed AAV-vectors for systemic expression of a soluble RSPO1 protein in ApcMin/+ mice. We found that the RSPO1-Fc fusion protein suppresses the Wnt/ß-catenin signaling activity in intestinal adenomas and in adenoma-derived intestinal organoids ex vivo, but not in normal intestinal epithelial cells. In the Apc mutant cells, the RSPO1-Fc fusion protein activated the TGFß/SMAD signaling pathway to suppress several Wnt target genes and adenoma growth, which effect was rescued suppressed by the TGFß receptor kinase inhibitor SB-431542. Simultaneously, RSPO1-Fc induced proliferation of the normal intestinal stem cells, giving them a growth advantage over the mutant cells, which enabled the intestinal epithelium to eventually outgrow the adenoma cells. Prolonged systemic expression of AAV-RSPO1-Fc decreased significantly the number of the intestinal adenomas and improved the overall survival of ApcMin/+ mice. Thus RSPO1-Fc provides the normal intestinal epithelial cells a growth advantage when compared to the adenoma cells, which eventually leads to the extrusion of the adenomatous tissue. An attractive idea now is to exploit such differential response of normal vs. cancer cells in cancer therapy.
2020-02-29 | GSE146099 | GEO
Project description:We constructed AAV-vectors for systemic expression of a soluble RSPO1 protein in ApcMin/+ mice. We found that the RSPO1-Fc fusion protein suppresses the Wnt/ß-catenin signaling activity in intestinal adenomas and in adenoma-derived intestinal organoids ex vivo, but not in normal intestinal epithelial cells. In the Apc mutant cells, the RSPO1-Fc fusion protein activated the TGFß/SMAD signaling pathway to suppress several Wnt target genes and adenoma growth, which effect was rescued suppressed by the TGFß receptor kinase inhibitor SB-431542. Simultaneously, RSPO1-Fc induced proliferation of the normal intestinal stem cells, giving them a growth advantage over the mutant cells, which enabled the intestinal epithelium to eventually outgrow the adenoma cells. Prolonged systemic expression of AAV-RSPO1-Fc decreased significantly the number of the intestinal adenomas and improved the overall survival of ApcMin/+ mice. Thus RSPO1-Fc provides the normal intestinal epithelial cells a growth advantage when compared to the adenoma cells, which eventually leads to the extrusion of the adenomatous tissue. An attractive idea now is to exploit such differential response of normal vs. cancer cells in cancer therapy.
2020-03-01 | GSE146138 | GEO
Project description:This SuperSeries is composed of the SubSeries listed below.
2020-03-01 | GSE146139 | GEO
Project description:PRDM proteins are tissue specific transcription factors often deregulated in diseases, particularly in cancer where different members have been found to act as oncogenes or tumor suppressors. PRDM5 is a poorly characterized member of the PRDM family for which several studies have reported a high frequency of promoter hypermethylation in cancers of gastrointestinal origin. We report here the characterization of Prdm5 knockout mice in the context of intestinal carcinogenesis. We demonstrate that loss of Prdm5 increases the number of adenomas throughout the murine small intestine on an ApcMin background. By genome-wide ChIP-seq and transcriptome analyses we identify loci encoding proteins involved in metabolic processes as prominent PRDM5 targets and characterize monoacylglycerol lipase (Mgll) as a direct PRDM5 target in human colon cancer cells and in Prdm5 mutant mouse intestines. Moreover, we report the downregulation of PRDM5 protein expression in human colon neoplastic lesions. In summary, our data provide the first causal link between Prdm5 loss and intestinal carcinogenesis and uncover an extensive and novel PRDM5 target repertoire likely facilitating the tumor suppressive functions of PRDM5. Two experimental conditions: wt and ko mice for PRDM5. Each experimental condition was replicated three times. This submission represents transcriptome component of study.
2013-05-11 | E-GEOD-46821 | biostudies-arrayexpress
Project description:R-spondin1 (Rspo1) is a member of a secreted protein family which has pleiotropic functions in development and stem cell growth. Rspo1 knock-out mice are sex-reversed, but some remain sub-fertile, so, they are unable to nurse their pups. A lack of Rspo1 expression in mammary epithelial cells results in an absence of duct side-branching development and defective alveolar formation. In this study we propose to characterize the molecular functions involved to mammary gland phenotype due to Rspo1 knock out. By transcriptional profiling, we have identified gene misregulated in mammary gland of Rspo1 knock-out mice during pregnancy. A stronger expression of genes characterising mesenchymal tissue was observed in the absence of alterations to the structure of mammary epithelial tissue. Mammary epithelial cell characterization, by immunohistochemistry approach, revealed a persistence of virgin markers which sign a delay in their differentiation. Moreover serial transplantation experiments show that Rspo1 is associated with a regenerative potential of mammary epithelial cell control. Our data have also highlighted that in mammary gland during pregnancy the expression of Rspo1’s partners, Lgr4 and RNF43, are negatively regulated and Tgf-β signaling is modified in the absence of Rspo1. Taken together, our results show an abrupt halt in mammary development at mid-pregnancy due to loss of further differentiated function.
2017-02-09 | GSE81244 | GEO
Project description:PRDM proteins are tissue specific transcription factors often deregulated in diseases, particularly in cancer where different members have been found to act as oncogenes or tumor suppressors. PRDM5 is a poorly characterized member of the PRDM family for which several studies have reported a high frequency of promoter hypermethylation in cancers of gastrointestinal origin. We report here the characterization of Prdm5 knockout mice in the context of intestinal carcinogenesis. We demonstrate that loss of Prdm5 increases the number of adenomas throughout the murine small intestine on an ApcMin background. By genome-wide ChIP-seq and transcriptome analyses we identify loci encoding proteins involved in metabolic processes as prominent PRDM5 targets and characterize monoacylglycerol lipase (Mgll) as a direct PRDM5 target in human colon cancer cells and in Prdm5 mutant mouse intestines. Moreover, we report the downregulation of PRDM5 protein expression in human colon neoplastic lesions. In summary, our data provide the first causal link between Prdm5 loss and intestinal carcinogenesis and uncover an extensive and novel PRDM5 target repertoire likely facilitating the tumor suppressive functions of PRDM5.
2013-05-11 | GSE46821 | GEO
Project description:The generation of the Lgr5_EGFP_ires_CreERT2 knock-in mouse allows marking of Lgr5 positive cells of different tissues. Here we use these mice to sort Lgr5 positive cells and their daughter cells form intestinal adenomas and describe the expression profile of these two cell populations.
2012-08-13 | GSE37926 | GEO
Project description:Proteomics of ACF as they mature and transform into intestinal adenomas in an AOM murine model consuming a normal diet under normal conditions.
2024-04-08 | PXD051252 | JPOST Repository
Project description:To determine whether RSPO1 and TGFβ1 activate similar transcription, RNA-seq analysis was performed to compare gene profiles after treatment by RSPO1 or TGFβ1. FET cells were treated with RSPO1 or TGFβ1 in triplicates for 4 hours and RNAs extracted from these cells were used for RNA-seq analysis. When gene expression profiles were compared, it was found that 153 genes were commonly regulated by either RSPO1 or TGFβ1. Interestingly, the majority of genes regulated by TGFβ1 were also regulated by RSPO1.
2017-09-09 | GSE103650 | GEO
Project description:The generation of the Lgr5_EGFP_ires_CreERT2 knock-in mouse allows marking of Lgr5 positive cells of different tissues. Here we use these mice to sort Lgr5 positive cells and their daughter cells form intestinal adenomas and describe the expression profile of these two cell populations. Intestinal adenomas were generated by inducing Apc deletion through tamoxifen injection in Apc_fl/fl-Lgr5_EGFP_ires_CreERT2 mice. In these mice, GFP is expressed under the control of the Lgr5 promoter, leading to highest GFP levels in Lgr5 positive cells (GFP-high). Dividing GFP-high cells pass on Gfp two their daughter cells, thereby diluting the GFP. Daughter cells can therefore be isolated based on their lower GFP positivity (GFP-low). We sorted these two cell fractions (GFP-high and GFP-low) and compared them to each other on 4X44K Agilent Whole Mouse Genome dual colour Microarrays (G4122F). Three independent sorts were performed and RNA of GFP-high cells hybridized directly against RNA of GFP-low cells in three dye swap experiments, resulting in six individual arrays.
2012-08-12 | E-GEOD-37926 | biostudies-arrayexpress