Purpose: Osteoblast cells mature from a mesenchymal stem cell pool to become cells capable of forming bone matrix and mineralizing this matrix. The goal of this study was to characterize temporal changes in the transcriptome across osteoblast maturation, starting with committed mesenchymal stem cell/ early pre-osteoblast stage through to mature osteoblasts capable of matrix mineralization. Methods: Enriched populations of pre-osteoblast like cells were obtained from neonatal calvaria from C57BL/6J mice expressing CFP under the control of the Col3.6 promoter. These cells were placed into culture for 4 days, removed from culture and subjected FACS sorting based on the presence/absence of CFP expression. Cells expressing CFP were returned to culture, subjected to an osteoblast differentiation cocktail and RNA was collected at 2, 4, 6, 8, 10, 12, 14, 16 and 18 days post differentiation. Methods II: mRNA profiles for each time point were generated by next generation RNA sequencing, using an Illumina HiSeq 2000. Three technical replicates per samples were sequenced. The alignments for abundance estimation of transcripts was conducted using Bowtie version 0.12.9, using the NCBIm37 reference genome. Expression level per gene was calculated using RSEM version 1.2.0 with the parameters of --fragment-length-mean 280 and --fragment-length-sd 50, and the expression level for each sample was normalized relative to the per sample upper quartile. Overall design: Gene expression in calvarial osteoblasts from neonatal C57BL/6J-Col3.6 CFP mice at 9 time points post differentiation
Identification of 153 new loci associated with heel bone mineral density and functional involvement of GPC6 in osteoporosis.
No sample metadata fields
View SamplesGene expression from bone-marrow drived macrophages of WT and SREBP-1a deficient mice
Linking lipid metabolism to the innate immune response in macrophages through sterol regulatory element binding protein-1a.
No sample metadata fields
View SamplesIn previous studies, it was observed that survivors who received stem cell transplantation and whole body irradiation showed development of NAFLD as a chronic effect.
Decreased Hepatic Lactotransferrin Induces Hepatic Steatosis in Chronic Non-Alcoholic Fatty Liver Disease Model.
Sex, Age, Specimen part
View SamplesThe retinal pigment epithelium (RPE) provides vital support to photoreceptor cells and its dysfunction is associated with the onset and progression of age-related macular degeneration (AMD). Surgical provision of RPE cells may ameliorate AMD and thus it would be valuable to develop sources of patient-matched RPE cells for this application of regenerative medicine. We describe here the generation of functional RPE-like cells from fibroblasts that represent an important step toward that goal. We identified candidate master transcriptional regulators of RPEs using a novel computational method and then used these regulators to guide exploration of the transcriptional regulatory circuitry of RPE cells and to reprogram human fibroblasts into RPE-like cells. The RPE-like cells share key features with RPEs derived from healthy individuals, including morphology, gene expression and function, and thus represent a step toward the goal of generating patient-matched RPE cells for treatment of macular degeneration.
A Systematic Approach to Identify Candidate Transcription Factors that Control Cell Identity.
Specimen part
View SamplesWe performed total transcriptome analysis by RNA-seq to find novel long non-coding RNAs which are differentiatlly expressed in myogenesis or osteogenesis. Overall design: Total RNA extracted from C2C12 myoblasts, 3-days differentiated myotubes, and 3-days trans-differentiated osteoblasts using BMP2 was used for transcriptome analysis.
Long non-coding RNA ChRO1 facilitates ATRX/DAXX-dependent H3.3 deposition for transcription-associated heterochromatin reorganization.
Specimen part, Cell line, Subject
View SamplesTo develop an in vitro model for developmental toxicity testing, we characterized gene expression changes during mouse embryonic stem cell (mESC) differentiation and their modulation by developmental toxicants.
Transcriptomic characterization of C57BL/6 mouse embryonic stem cell differentiation and its modulation by developmental toxicants.
Specimen part
View SamplesTo unravel the mechanisms of thalidomide developmental toxicity, we used microarrays to study transcriptomic changes induced by thalidomide during mouse embryonic stem cell (mESC) differentiation.
Thalidomide induced early gene expression perturbations indicative of human embryopathy in mouse embryonic stem cells.
Specimen part
View SamplesAging has been shown to be under genetic control in C. elegans. We performed Affymetrix micorarray-based transcriptional profililng of wild type C. elegans strain Bristol N2 during aging to detect temporal changes in gene expression.
A decline in p38 MAPK signaling underlies immunosenescence in Caenorhabditis elegans.
Specimen part
View SamplesBackground
Expression quantitative trait loci mapping identifies new genetic models of glutathione S-transferase variation.
No sample metadata fields
View SamplesMacrophages are amongst the major targets of glucocorticoids (GC) as therapeutic anti-inflammatory agents. Here we show that GC treatment of mouse and human macrophages initiates a cascade of induced gene expression including many anti-inflammatory genes. Inducible binding of the glucocorticoid receptor (GR) was detected at candidate enhancers in the vicinity of induced genes in both species and this was strongly associated with canonical GR binding motifs. However, the sets of inducible genes, the candidate enhancers, and the GR motifs within them, were highly-divergent between the two species.
Enhancer Turnover Is Associated with a Divergent Transcriptional Response to Glucocorticoid in Mouse and Human Macrophages.
Sex, Age, Specimen part, Treatment, Time
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