Intracellular trafficking is essential for proper cell signaling. In the pancreas, secretory cells rely on trafficking to regulate blood glucose and digestion. Pancreatic disorders reflect defects in function or development, evoking considerable interest in understanding the molecular genetics governing pancreatic organogenesis. Here, we show the transcription factor NFIA regulates trafficking in both the embryonic and adult pancreas, affecting both developmental cell fate decisions and adult physiology. NFIA deletion from pancreatic progenitors led to the development of more acinar cells and ducts and fewer endocrine cells, whereas ectopic NFIA promoted endocrine formation. We found that NFIA's effects on trafficking influence endocrine/exocrine cell fate decisions through regulation of Notch. Adult NFIA-deficient mice develop diabetic phenotypes due to impaired insulin granule trafficking and defects in acinar zymogen secretion. This study shows how a single transcription factor, NFIA, thus exerts profound effects on both embryonic cell fate and adult physiology by regulating vesicle trafficking. Overall design: 2 control and 2 NFIA fl/fl; Pdx1-cre samples, from pooled embryonic litters at E17.5
Pancreatic Cell Fate Determination Relies on Notch Ligand Trafficking by NFIA.
Specimen part, Cell line, Subject
View SamplesDevelopmental regulation of gliogenesis in the mammalian CNS is incompletely understood, in part due to a limited repertoire of lineage-specific genes. We used Aldh1l1-GFP as a marker for gliogenic radial glia and later-stage precursors of developing astrocytes and performed gene expression profiling of these cells. We then used this dataset to identify candidate transcription factors that may serve as glial markers or regulators of glial fate. Our analysis generated a database of developmental stage-related markers of Aldh1l1+ cells between murine embryonic day 13.5-18.5. Using these data we identify the bZIP transcription factor Nfe2l1 and demonstrate that it promotes glial fate under direct Sox9 regulatory control. Thus, this dataset represents a resource for identifying novel regulators of glial development.
Expression profiling of Aldh1l1-precursors in the developing spinal cord reveals glial lineage-specific genes and direct Sox9-Nfe2l1 interactions.
Specimen part
View SamplesGene expression along the crypt-villus (C-V) axis was analyzed using cryostat sectioning to isolate fractions representing the crypts (bottom) and villus tops (top). These fractions were used for analyzing gene expression in iron replete Wistar rats (++), iron deficient Wistar rats (low iron), and in iron deficient Wistar rats fed iron for 3 and 6 days (iron-fed). Differences were observed between the crypts and villus tops in the expression of genes associated with Wnt and BNP signaling, cell proliferation and apoptosis, lipid and iron transport and metabolism. Gene expression in villus crypts and tops was also compared between Wistar and Belgrade rats (bb) and Belgrade rats fed iron (iron-fed) particularly as related to iron absorption and metabolism to define the affects of the mutation in DMT1 in the Belgrade rat on the expression of genes related to iron absorption and metabolism and the response to iron feeding.
Hypoxia-inducible factor-2α and iron absorptive gene expression in Belgrade rat intestine.
No sample metadata fields
View SamplesThis SuperSeries is composed of the SubSeries listed below.
Combinatorial recruitment of CREB, C/EBPβ and c-Jun determines activation of promoters upon keratinocyte differentiation.
Specimen part, Treatment
View SamplesCombinatorial recruitment of CREB, C/EBPb and Jun determines activation of promoters upon keratinocyte differentiation
Combinatorial recruitment of CREB, C/EBPβ and c-Jun determines activation of promoters upon keratinocyte differentiation.
Specimen part, Treatment
View SamplesTaMYB13 is a transcription factor that has been associated with fructan accumulation in previous studies in wheat (Xue et al. 2011 Plant journal 68: 857 - 870). In this study we aimed to find genes regulated by TaMYB13, through overexpression of this transcription factor in wheat and perform expression analysis by making use of Affymetrix genechip assays.
TaMYB13-1, a R2R3 MYB transcription factor, regulates the fructan synthetic pathway and contributes to enhanced fructan accumulation in bread wheat.
Specimen part
View SamplesThis study assessed the transcriptional profile of SiHa cells. SiHa is a cervical cancer cell line with integrated HPV16, and was used as a model to study human gene expression in the context of integrated virus. Gene expression in SiHa, calculated by Cufflinks, was scored in windows around the locations of known viral integrations in patients or cell lines to determine if there was an association between gene expression and viral integration. We found that SiHa gene expression was higher near loci of integration for HPV18 vs. HPV16, cervical tissues vs. head and neck cancers, and cervical cancers vs. in vitro integrations. This study provides insight into the factors that may influence where viruses integrate in the human genome. Overall design: Gene Expression in untreated SiHa cells.
Meta-Analysis of DNA Tumor-Viral Integration Site Selection Indicates a Role for Repeats, Gene Expression and Epigenetics.
No sample metadata fields
View SamplesObjective: We hypothesized that type 1 diabetes (T1D) is accompanied by changes in gene expression in peripheral blood mononuclear cells (PBMCs) due to dysregulation of adaptive and innate immunity, counterregulatory responses to immune dysregulation, insulin deficiency and hyperglycemia. Research Design and Methods: Microarray analysis was performed on PBMCs from 43 patients with newly diagnosed T1D, 12 patients with newly diagnosed type 2 diabetes (T2D) and 24 healthy controls. One and four month follow-up samples were obtained from 20 of the T1D patients.
Gene expression in peripheral blood mononuclear cells from children with diabetes.
Sex, Age, Treatment, Race
View SamplesKeloids are scars that extend beyond original wounds and are resistant to treatment. In order to improve understanding of the molecular basis of keloid scarring, we have assessed the genomic profiles of keloid fibroblasts and keratinocytes.
Keloid-derived keratinocytes exhibit an abnormal gene expression profile consistent with a distinct causal role in keloid pathology.
Sex, Age, Specimen part, Race
View SamplesIn the field, adult male rodents are more frequently infected with hantaviruses than females. Early data suggests that sex steroid hormones modulate sex differences in host immune response. This project focuses on elucidating sex differences in gene expression in the lungs of infected males 15 and 40 days post infection with Seoul virus (naturally occurring hantavirus in Norway rats) relative to infected females 15 and 40 days post infection on 12 RG_U34 GeneChips.
Differential expression of immunoregulatory genes in male and female Norway rats following infection with Seoul virus.
No sample metadata fields
View Samples