Gene expression profiling was carried out on peripheral blood leukocytes from 14 healthy older adults. The primary research question is whether gene expression differs in individuals experiencing chronically high levels of social isolation (by UCLA Loneliness Scale) vs chronically low levels of social isolation.
Social regulation of gene expression in human leukocytes.
No sample metadata fields
View SamplesTranscripomic analysis of leaf gene expression in S and N-deficient winter wheat during grain development. Tissue was harvested at anthesis and 7, 14 and 21 days post anthesis from experimental field plots.
Co-ordinated expression of amino acid metabolism in response to N and S deficiency during wheat grain filling.
Specimen part, Disease, Disease stage, Subject, Time
View SamplesCerebral malaria (CM) is a leading cause of death in the world. Better understanding of the pathogenesis of this disease is critical for the development of novel therapies. In this work, we investigated temporal gene expression profiles in the brains of CM-susceptible and CM-resistant mice during infection with P. Berghia ANKA (PbA).
Expression microarray analysis implicates apoptosis and interferon-responsive mechanisms in susceptibility to experimental cerebral malaria.
No sample metadata fields
View SamplesSulphur is an essential macronutrient for plant growth and development. Reaching a thorough understanding of the molecular basis for changes in plant metabolism depending on the sulphur-nutritional status at the systems level will advance our basic knowledge and help target future crop improvement. Although the transcriptional responses induced by sulphate starvation have been studied in the past, knowledge of the regulation of sulphur metabolism is still fragmentary. This work focuses on the discovery of candidates for regulatory genes such as transcription factors (TFs) using omics technologies. For this purpose a short term sulphate-starvation / re-supply approach was used. ATH1 microarray studies and metabolite determinations yielded 21 TFs which responded more than 2-fold at the transcriptional level to sulphate starvation. Categorization by response behaviors under sulphate-starvation / re-supply and other nutrient starvations such as nitrate and phosphate allowed determination of whether the TF genes are specific for or common between distinct mineral nutrient depletions. Extending this co-behavior analysis to the whole transcriptome data set enabled prediction of putative downstream genes. Additionally, combinations of transcriptome and metabolome data allowed identification of relationships between TFs and downstream responses, namely, expression changes in biosynthetic genes and subsequent metabolic responses. Effect chains on glucosinolate and polyamine biosynthesis are discussed in detail. The knowledge gained from this study provides a blueprint for an integrated analysis of transcriptomics and metabolomics and application for the identification of uncharacterized genes.
Transcriptome and metabolome analysis of plant sulfate starvation and resupply provides novel information on transcriptional regulation of metabolism associated with sulfur, nitrogen and phosphorus nutritional responses in Arabidopsis.
Specimen part
View SamplesABSTRACT
Variation in molybdenum content across broadly distributed populations of Arabidopsis thaliana is controlled by a mitochondrial molybdenum transporter (MOT1).
No sample metadata fields
View SamplesMedulloblastoma is the most common form of malignant paediatric brain tumour and is the leading cause of childhood cancer related mortality. The four molecular subgroups of medulloblastoma that have been identified WNT, SHH, Group 3 and Group 4 - have molecular and topographical characteristics suggestive of different cells of origin. Definitive identification of the cell(s) of origin of the medulloblastoma subgroups, particularly the poorer prognosis Group 3 and Group 4 medulloblastoma, is critical to understand the pathogenesis of the disease, and ultimately for the development of more effective treatment options.
Gene expression analyses of the spatio-temporal relationships of human medulloblastoma subgroups during early human neurogenesis.
Sex, Age
View SamplesEffect of sulforaphane (SF) on human colon caco-2 cells after 24h treatment
Transcriptome analysis of human colon Caco-2 cells exposed to sulforaphane.
Specimen part, Disease, Disease stage, Cell line, Compound
View SamplesSince hair growth disorders can carry a major psychological burden, more effective human hair growth-modulatory agents need to be urgently developed. Here, we used the hypertrichosis-inducing immunosuppressant, cyclosporine A (CsA), as a lead compound to identify new hair growth-promoting targets. Through microarray analysis we identified the Wnt inhibitor, SFRP1, as being downregulated in the dermal papilla (DP) of CsA-treated human scalp hair follicles (HFs) ex vivo. Therefore, we further investigated the function of SFRP1 using a pharmacological approach and found that SFRP1 regulates intrafollicular canonical Wnt/-catenin activity through inhibition of Wnt ligands in the human hair bulb. Conversely, inhibiting SFRP1 activity through the SFRP1 antagonist, WAY-316606, enhanced hair shaft production, hair shaft keratin expression and inhibited spontaneous HF regression (catagen) ex vivo. Collectively, these data (a) identify Wnt signaling as a novel, non-immune-inhibitory CsA target; (b) introduce SFRP1 as a physiologically important regulator of canonical -catenin activity in a human (mini-)organ; and (c) demonstrate WAY-316606 to be a promising new promoter of human hair growth. Since inhibiting SFRP1 only facilitates Wnt signaling through ligands that are already present, this ligand-limited therapeutic strategy for promoting human hair growth may circumvent potential oncological risks associated with chronic Wnt over-activation.
Identifying novel strategies for treating human hair loss disorders: Cyclosporine A suppresses the Wnt inhibitor, SFRP1, in the dermal papilla of human scalp hair follicles.
Sex, Specimen part, Treatment
View SamplesKMS-11 and KMS-34 cells were exposed to stepwise increasing concentrations of carfilzomib over a period of 18 weeks: cells adapted to growth in 4 nM carfilzomib by 4 weeks, in 6 nM in another 6 weeks and in 12 nM after a further 8 weeks. The resulting cell cultures, denoted KMS-11/Cfz and KMS-34/Cfz, respectively, retained resistance to carfilzomib even when tested after removal of selective pressure for approximately 8 weeks.
KLF4-SQSTM1/p62-associated prosurvival autophagy contributes to carfilzomib resistance in multiple myeloma models.
Specimen part, Cell line
View SamplesLP-1 cells were exposed to stepwise increasing concentrations of carfilzomib over a period of 18 weeks: cells adapted to growth in 4 nM carfilzomib by 4 weeks, in 6 nM in another 6 weeks and in 12 nM after a further 8 weeks. The resulting cell culture, denoted LP-1/Cfz, retained resistance to carfilzomib even when tested after removal of selective pressure for approximately 8 weeks.
Noncanonical SQSTM1/p62-Nrf2 pathway activation mediates proteasome inhibitor resistance in multiple myeloma cells via redox, metabolic and translational reprogramming.
Cell line
View Samples