Monuron (1,1-dimethyl-3-(4-chlorophenyl) urea) is a non-selective phenylurea herbicide, widely used in the developing countries, however concerns have been raised about it toxicity and carcinogenicity. Monuron was evaluated by the National Toxicology Program (1988) and shown to be a male rat-specific renal carcinogen; however the mechanism of carcinogenesis is unknown. In this study we have examined the effect of sub-cytotoxic exposure to monuron (250M) at 6h, 24h and 72h on the whole-genome expression profile in a rat proximal renal tubule cell line (NRK-52E). In addition we examined the short term exposure of MON in kidney and liver of exposed rats.
No associated publication
Specimen part, Cell line, Treatment
View SamplesNeuronal, endocrine and exocrine cells exhibit regulated exocytosis but there is also a body of evidence for regulated exocytosis from other cell types. Myofibroblasts are a stromal cell type that secretes extracellular matrix proteins, growth factors and cytokines; they are important in wound healing and increasingly are recognised to play a role in modifying the cellular microenvironment in cancer. We have established calcium dependent regulated secretion in a subset of myofibroblasts from gastric cancers, adjacent tissue and from normal tissue. We have used microarrays to look for the expression of genes associated with the regulated secretory phenotype.
The neuroendocrine phenotype of gastric myofibroblasts and its loss with cancer progression.
Specimen part
View SamplesIn this study we have examined the effect of sub-cytotoxic exposure to aristolochic acids (1.65M) at 6h, 24h and 72h on the whole-genome expression profile in a rat proximal renal tubule cell line (NRK-52E).
Aristolochic acids - Induced transcriptomic responses in rat renal proximal tubule cells in vitro.
Cell line, Time
View SamplesCultured NIH/3T3 cels were infeced at MOI of 10 with wild type and RDR mutant of SFV virus.. Total RNA was extracted 8 hours post-infection for gene expression analysis.
No associated publication
Cell line
View SamplesSynovial fibroblasts in persistent inflammatory arthritis have been suggested to have parallels with cancer growth and wound healing, both of which involve a stereotypical serum response program. We tested the hypothesis that a serum response program can be used to classify diseased tissues, and investigated the serum response program in fibroblasts from multiple anatomical sites and two diseases. To test our hypothesis we utilized a bioinformatics approach to explore a publicly available microarray dataset including RA, OA and normal synovial tissue, then extended those findings in a new microarray dataset representing matched synovial, bone marrow and skin fibroblasts cultured from RA and OA patients undergoing arthroplasty. The classical fibroblast serum response program discretely classified RA, OA and normal synovial tissues. Analysis of low and high serum treated fibroblast microarray data revealed a hierarchy of control, with anatomical site the most powerful classifier followed by response to serum and then disease. In contrast to skin and bone marrow fibroblasts, exposure of synovial fibroblasts to serum led to convergence of RA and OA expression profiles. Pathway analysis revealed three inter-linked gene networks characterising OA synovial fibroblasts: Cell remodelling through insulin-like growth factors, differentiation and angiogenesis through 3 integrin, and regulation of apoptosis through CD44. We have demonstrated that Fibroblast serum response signatures define disease at the tissue level, and that an OA specific, serum dependent repression of genes involved in cell adhesion, extracellular matrix remodelling and apoptosis is a critical discriminator between cultured OA and RA synovial fibroblasts.
Stromal transcriptional profiles reveal hierarchies of anatomical site, serum response and disease and identify disease specific pathways.
Specimen part, Disease
View SamplesEight groups of mice of two genetic backgrounds (WT or Trem2(-/-)) were fed one of the four diets: 1) regular chow; 2) chow supplemented with Covi-ox T-70; 3) chow supplemented with cuprizone; 4) chow supplemented with both Covi-Ox and cuprizone
No associated publication
Specimen part, Treatment
View SamplesCryopreservation consists of preserving living cells or tissues at <-100C and has many applications in, for instance, stem cell and organ banking. Cryoprotectant agents, like ethylene glycol, are required for successful cryopreservation but have toxic side effects due to largely unknown mechanisms. In this work, we studied the toxicity of ethylene glycol in Human Umbilical Vein Endothelial Cells (HUVECs). Exposing cells to 60% ethylene glycol for two hours at 4C resulted in a slight decrease in cell growth, suggesting a modest toxicity of ethylene glycol and that HUVECs do not exhibit particular sensitivity to it. Gene expression analysis with whole genome micro-arrays revealed signatures indicative of a generalized stress response at 24 hours after stress and recovery at 72 hours, involving signaling pathways, glycoproteins, and genes involved in extracellular and transmembrane functions. These results reveal a new paradigm and signatures for future experiments in elucidating the toxicity effects of ethylene glycol in vascular endothelial cells.
Insights on cryoprotectant toxicity from gene expression profiling of endothelial cells exposed to ethylene glycol.
Specimen part, Treatment
View SamplesNevirapine is a non-nucleoside reverse transcriptase inhibitor, a class of antiretroviral drug, used for the treatment of HIV-1 infection. Despite its wide use, nevirapine treatment has been associated with a significant incidence of different kind of hypersensitivity reactions (HSRs).
No associated publication
Sex, Specimen part
View SamplesThis study is part of a larger multidisciplinary study entitled A dormant sub-population expressing interleukin-1 receptor characterises anti-estrogen resistant ALDH+ breast cancer stem cells.
Increased Expression of Interleukin-1 Receptor Characterizes Anti-estrogen-Resistant ALDH<sup>+</sup> Breast Cancer Stem Cells.
Specimen part, Disease, Subject
View SamplesThere is differential expression of genes between cases and controls using microarray analysis, and genes that are crucial for host defence responses are significantly up-regulated in cases during pneumococcal infection.
Peripheral blood RNA gene expression in children with pneumococcal meningitis: a prospective case-control study.
Specimen part, Disease, Disease stage
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