Pioneering studies within the last few years have allowed the in vitro expansion of tissue-specific adult stem cells from a variety of endoderm-derived organs, including the stomach, small intestine and colon. Here we derived organoids from mouse gallbladder tissue (gallbladder organoids), from mouse liver (including the extrahepatic biliary ducts and gallbladder; liver organoids) and from mouse small intestine tissue (intestinal organoids). RNA was prepared from these organoids and used to assay expression of 21,258 genes using Affymetrix gene expression arrays. RNA was also prepared from mouse gallbladder, liver and small intestine tissues and used to assay gene expression in these tissues. Finally, gallbladder organoids were induced to differentiate by removing R-spondin 1 and noggin from the culture media and subjected to gene expression array analysis.
R-spondin 1 and noggin facilitate expansion of resident stem cells from non-damaged gallbladders.
Specimen part
View SamplesWe compared the transcriptomes of isogenic diploid fibroblasts expressing progerin or elevated levels of wild-type prelamin A with that of wild-type fibroblasts. We subsequently used the reversion towards normal of two phenotypes, reduced cell growth and dismorphic nuclei, by treatment with farnesyltransferase inhibitor (FTI) or overexpression of ZMPSTE24, as a filtering strategy to identify genes linked to the onset of these two phenotypes.
A filtering strategy identifies FOXQ1 as a potential effector of lamin A dysfunction.
Specimen part, Cell line, Treatment
View SamplesDiploid and tetraploid budding yeast cell cultures were grown in YPD, at 30C, to O.D. approx. 0.5.
Genome-wide genetic analysis of polyploidy in yeast.
Sex
View SamplesElevated expression and activity of the epidermal growth factor receptor (EGFR)/protein kinase B (Akt) signaling pathway is associated with development, progression and treatment resistance of head and neck cancer (HNC). Several studies have demonstrated that microRNA-7 (miR-7) regulates EGFR expression and Akt activity in a range of cancer cell types via its specific interaction with the EGFR mRNA 3 untranslated region (3-UTR). In the present study, we found that miR-7 regulated EGFR expression and Akt activity in HNC cell lines, and that this was associated with reduced growth in vitro and in vivo of cells (HN5) that were sensitive to the EGFR tyrosine kinase inhibitor (TKI) erlotinib (Tarceva). miR-7 acted synergistically with erlotinib to inhibit growth of erlotinib-resistant FaDu cells, an effect associated with increased inhibition of Akt activity. Microarray analysis of HN5 and FaDu cell lines transfected with miR-7 identified a common set of downregulated miR-7 target genes, providing insight into the tumor suppressor function of miR-7. Furthermore, we identified several target miR-7 mRNAs with a putative role in the sensitization of FaDu cells to erlotinib. Together, these data support the coordinate regulation of Akt signaling by miR-7 in HNC cells and suggest the therapeutic potential of miR-7 alone or in combination with EGFR TKIs in this disease.
Regulation of epidermal growth factor receptor signaling and erlotinib sensitivity in head and neck cancer cells by miR-7.
Specimen part, Cell line
View SamplesWe investigated the influence of SCFAs on human, monocyte derived DCs that represent a reliable in vitro model to study circulating DCs, one of the key regulators of our immune system. We studied the individual effect exerted by SCFA, the main metabolic end-products of fermentation by anaerobic bacteria in the gut, on the gene expression of immature and mature DC, exploring the potential of circulating bacterial metabolites to directly influence immune system cells. We found that SCFAs have little effect on the transcriptome of immature DC, whereas the transcriptome of mature DC was highly perturbed especially by butyrate and propionate. Our findings show an overall down-regulation of LPS-induced inflammatory responses and provide new insights into host-microbiome interactions.
The effect of short-chain fatty acids on human monocyte-derived dendritic cells.
Specimen part, Treatment
View SamplesGene expression of memory CD4+ and CD8+ T cells determined by RNAseq 30 days after LCMV Armstrong infection Overall design: 30 days post-infection with LCMV Arm spleen GP66:I-Ab+ T cells from Zbtb7bAD (CD4 Zbtb7bAD) or Tnfrsf4-Cre– (CD4 Ctrl) mice and of spleen GP33:H-2Db+ T cells from Tnfrsf4-Cre– animals (CD8 Ctrl) were sorted and gene expression was determined by RNAseq
The Emergence and Functional Fitness of Memory CD4<sup>+</sup> T Cells Require the Transcription Factor Thpok.
Subject
View SamplesSingle-cell gene expression of effector and memory CD4+ and CD8+ T cells from WT or Thppok-deficient animals was determined by sRNAseq after LCMV Armstrong infection Overall design: 7 and 30 days post-infection with LCMV Arm spleen T cells were sorted and gene expression was determined by scRNAseq
The Emergence and Functional Fitness of Memory CD4<sup>+</sup> T Cells Require the Transcription Factor Thpok.
Specimen part, Subject
View SamplesTranscription profiling of Arabidopsis mutant ron1-1 vs the wild type Ler
The RON1/FRY1/SAL1 gene is required for leaf morphogenesis and venation patterning in Arabidopsis.
Specimen part
View SamplesIn order to investigate the effects of Glatiramer acetate (GA) in treatment-nave RR-MS female patients B cells we performed Affymetrix Gene-Chip Human Genome HG-U133A_2 hybridization experiments
Glatiramer Acetate modulates ion channels expression and calcium homeostasis in B cell of patients with relapsing-remitting multiple sclerosis.
Sex, Specimen part, Disease, Subject
View SamplesTranscriptional profile of control and VEGF overexpressing FACS-isolated CD34+ Cancer stem cells from DMBA/TPA induced skin tumours
A vascular niche and a VEGF-Nrp1 loop regulate the initiation and stemness of skin tumours.
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View Samples