Chronic early life stress increases adult susceptibility to numerous health problems linked to chronic inflammation. One way that this may occur is via glucocorticoid-induced developmental programming. To gain insight into such programming, we treated zebrafish embryos with cortisol and examined the effects on adults. In adulthood, the treated fish maintained elevated basal cortisol levels in the absence of exogenous cortisol, and constitutively mis-expressed genes involved in defense response and its regulation. Adults derived from cortisol-treated embryos displayed defective tailfin regeneration, heightened basal expression of pro-inflammatory genes, and failure to appropriately regulate those genes following injury or immunological challenge. These results support the hypothesis that chronically elevated glucocorticoid signaling early in life directs development of a pro-inflammatory adult phenotype, at the expense of immunoregulation and somatic regenerative capacity. Overall design: 30 samples total were analyzed. 9 caudal fins samples (0, 2 and 4dpa), 3 blood samples and 3 muscle samples from adults exposed to DMSO control as embryos. 9 caudal fins samples (0, 2 and 4dpa), 3 blood samples and 3 muscle samples from adults exposed to cortisol (1 micromolar) as embryos.
Cortisol-treated zebrafish embryos develop into pro-inflammatory adults with aberrant immune gene regulation.
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View SamplesChronic early life stress increases adult susceptibility to numerous health problems linked to chronic inflammation. One way that this may occur is via glucocorticoid-induced developmental programming. To gain insight into such programming we treated zebrafish embryos with 1 micromolar cortisol and examined the effects on larvae. Treated larvae had elevated whole-body cortisol and glucocorticoid signaling, and up-regulated genes associated with defense response and immune system processes. Overall design: 6 samples total were analyzed. 3 DMSO controls, and 3 cortisol treated (1 micromolar).
Cortisol-treated zebrafish embryos develop into pro-inflammatory adults with aberrant immune gene regulation.
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View SamplesIn order to identify genes with different overall transcript levels or differential exon levels (alternative processing) between the groups Control and Tat-SF1KD, we studied 11 hybridizations on the HumanExon10ST array using mixed model analysis of variance. 526 genes with significant transcript level differences between the groups and 1397 genes with significant differential exon levels were found, including 99 genes with both transcript and exon level differences (p<0.01).
Identification of Tat-SF1 cellular targets by exon array analysis reveals dual roles in transcription and splicing.
Cell line
View SamplesTCF-1 is an HMG family transcription factor which is known to be activated by the canonical Wnt signaling pathway and modulated by other signals such as those derived from T cell receptor. We found that during CD8 T cell responses, TCF-1 deficiency impaired long-term maintenance of antigen-specific memory CD8 T cells.
Differentiation and persistence of memory CD8(+) T cells depend on T cell factor 1.
Specimen part
View SamplesExpression data from Kc167 cells under normal conditions. Used to assess expression levels of genes with ORC bound at promoter.
Drosophila ORC localizes to open chromatin and marks sites of cohesin complex loading.
Cell line
View SamplesIn a fluorescence polarization screen for MYC-MAX interaction, we have identified a novel small molecule inhibitor of MYC, KJ-Pyr-9, from a Kröhnke pyridine library. The Kd of KJ-Pyr-9 for MYC in vitro is 6.5 ± 1.0 nM as determined by backscattering interferometry; KJ-Pyr-9 also interferes with MYC-MAX complex formation in the cell as shown in a protein fragment complementation assay. KJ-Pyr-9 specifically inhibits MYC-induced oncogenic transformation in cell culture; it has no or only weak effects on the oncogenic activity of several unrelated oncoproteins. KJ-Pyr-9 preferentially interferes with the proliferation of MYC-overexpressing human and avian cells and specifically reduces the MYC-driven transcriptional signature. In vivo, KJ-Pyr-9 effectively blocks the growth of a xenotransplant of MYC-overexpressing human cancer cells. Overall design: 4 treatment groups analyzed in triplicate: no treatment(control), 20uM KJ-Pyr-9, 0.1ug/mL doxycycline and KJ-Pyr-9 in combination with doxycycline
Inhibitor of MYC identified in a Kröhnke pyridine library.
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View SamplesVolatiles of certain rhizobacteria can cause growth inhibitory effects on plants/ Arabidopsis thaliana. How these effects are initiated and which mechanisms are enrolled is not yet understood. Obviously the plant can survive/live with the bacteria in the soil, which suggest the existance of a regulatory mechanism/network that provide the possibility for coexistance with the bacteria. To shed light on this regulatory mechanism/network we performed a microarray anlaysis of Arabidopsis thaliana co-cultivated with two different rhizobacteria strains.
Volatiles of two growth-inhibiting rhizobacteria commonly engage AtWRKY18 function.
Age, Specimen part, Time
View SamplesCaryopses of barley (Hordeum vulgare), like all other cereal seeds, are complex sink organs optimized for storage starch accumulation and embryo development. Their development from early stages after pollination to late stages of seed ripening has been studied in great detail. However, information on the caryopses diurnal adaptation to changes in light, temperature and alterations in phloem-supplied carbon and nitrogen remained unknown.
Significance of light, sugar, and amino acid supply for diurnal gene regulation in developing barley caryopses.
Age, Specimen part
View SamplesHigh temperature stress, like any abiotic stress, impairs the physiology and development of plants, including the stages of seed setting and ripening.
Transcriptome analysis of high-temperature stress in developing barley caryopses: early stress responses and effects on storage compound biosynthesis.
Age, Specimen part
View SamplesThe transcriptome of naive OT-I T cells was compared to memory CD8 T cells after 1, 2, 3, or 4 infection with ovalbumin expressing Listeria monocytogenes (LM-OVA).
Repetitive antigen stimulation induces stepwise transcriptome diversification but preserves a core signature of memory CD8(+) T cell differentiation.
Specimen part
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