Butyrate Induced Changes in Wnt Signaling-Specific Gene Expression in Colorectal Cancer Cells
Ontology highlight
ABSTRACT:
ORGANISM(S): Homo sapiens
SUBMITTER: Michael Bordonaro
PROVIDER: E-GEOD-54127 | biostudies-arrayexpress |
REPOSITORIES: biostudies-arrayexpress
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2015-11-04 | E-GEOD-62921 | biostudies-arrayexpress
Project description:This SuperSeries is composed of the SubSeries listed below. Refer to individual Series
2015-11-04 | E-GEOD-62923 | biostudies-arrayexpress
Project description:T cell activation leads to dramatic changes in cellular phenotype. We used CD3/CD28-activated human CD4 T cells to study how RNA binding proteins define the post-transcriptional landscape. Using RIPseq, we identified the RNA interactome of U2AF2 and show at the global level that U2AF2 binds the majority of transcripts that are differentially expressed and/or alternatively spliced during CD4 T cell activation. A unique protein interactome centered on U2AF2 is assembled in response to activation. Knocking down specific U2AF2 interacting partners (U2AF1, SYNCRIP, SRRM2, ILF2) selectively affects cytokine secretion and expression of activation markers. Furthermore, the expression and/or alternative splicing of transcripts important for immune cell function are also affected by knocking down these U2AF2 interacting proteins. U2AF1 and SYNCRIP knockdowns affect the proteins and transcripts bound to U2AF2, altering the transcriptome. Our work highlights the importance of RNA binding protein complexes in regulating the differential expression and alternative splicing that defines T cell activation. HTA 2.0 microarray results of U2AF2 RIP RNA from a primary CD4 T cell culture after treatment with siRNAs (Control, U2AF1, and SYNCRIP) and 24 hours after anti-CD3/CD28 bead activation Please note that the Series supplementary 'U2AF2RIP_HTA2_all_siRNA_100414.xlsx' file includes multiple worksheets containing: 1) Differentially expressed genes in ctrl siRNA vs. U2AF1 siRNA; 2) Differntially spliced genes in ctrl siRNA vs. U2AF1 siRNA; 3) Differentially spliced exons in ctrl siRNA vs. U2AF1 siRNA; 4) Differentially expressed genes in ctrl siRNA vs. SYNCRIP siRNA; 5) Differntially spliced genes in ctrl siRNA vs. SYNCRIP siRNA; 6) Differentially spliced exons in ctrl siRNA vs. SYNCRIP siRNA
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2014-08-13 | E-GEOD-42909 | biostudies-arrayexpress
Project description:In the mammalian intestine, crypts of Leiberkühn house intestinal epithelial stem /progenitor cells at their base. We found that the presence of this structure was supported by the physiologic role of a prominent bacterial metabolite, butyrate. This bacterially-produced short chain fatty acid inhibited intestinal epithelial proliferation at physiologic concentrations. During homeostasis, butyrate did not suppress epithelial stem proliferation because it was metabolized by differentiated colonocytes. Provision of butyrate access to stem/progenitor cells either through mucosal injury or application to a crypt-less host led to inhibition of proliferation. The mechanism was dependent on HDAC inhibition in stem cells and the transcription factor Foxo3. Thus, the mammalian crypt unit structure provides energy for differentiated cells at a distance from the crypt base and this action prevents suppression of stem/progenitor proliferation. In total 4 samples were analyzed from 2 independent experiments. Two samples of colonic stem cells treated with 1mM Butyrate and two samples of colonic stem cells treated with 1mM NaCl (mock) as a control
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