Dendritic cells (DCs) are critical mediators of host defense against bacteria. The goal of this microarray study was to understand the global transcriptional response of bone marrow-derived dendritic cells (BMDCs) upon exposure to live bacteria, to better understand how DCs orchestrate a host-protective immune response. We found that BMDCs upregulate a number of critical immune-related genes upon exposure to live E. coli. Most notably, the gene encoding hepcidin, a critical regulator of mammalian iron homeostasis, was significantly upregulated in BMDCs upon exposure to live bacteria.
Dendritic cell-derived hepcidin sequesters iron from the microbiota to promote mucosal healing.
Specimen part
View SamplesMicroarray comparisons of polysome loading in wild-type Arabidopsis and eif3h mutant
On the functions of the h subunit of eukaryotic initiation factor 3 in late stages of translation initiation.
No sample metadata fields
View SamplesMicroarray comparisons of transcript level in wild-type Arabidopsis and eif3h mutant plants.
On the functions of the h subunit of eukaryotic initiation factor 3 in late stages of translation initiation.
No sample metadata fields
View SamplesIdentification of innate immune responses in the livers of mice infected with liver-stage arresting, transgenic, Plasmodium yoelii parasites. Overall design: Whole liver samples from mock and P. yoelli fabb/f- infected C57BL/6 and BALB/cJ mice. Samples were taken 1 and 3 days post infection
Interferon-mediated innate immune responses against malaria parasite liver stages.
Specimen part, Cell line, Subject
View SamplesIdentification of AP-2d target genes in the midbrain of E15 mouse embryos
AP-2δ is a crucial transcriptional regulator of the posterior midbrain.
Specimen part
View SamplesGlioblastoma multiforme is the most lethal form of glioma with an overall survival at 5 years nearly null, which mainly results from acquired resistance to therapies. Large scale sequencing studies on human cancer biopsies defined IRE1alpha as the fifth most oncogenic mutated kinase in human cancer. IRE1alpha is a major component of the Unfolded Protein Response signaling and increasing evidence suggests that it is a central player in GBM development.
Dual IRE1 RNase functions dictate glioblastoma development.
Specimen part, Cell line
View SamplesAdenosine binds to 4 G protein-coupled receptors located on the cardiomyocyte (A1-R, A2a-R, A2b-R and A3-R) and modulates cardiac function during both ischemia and load-induced stress. While the role of adenosine receptor-subtypes has been well defined in the setting of ischemia-reperfusion, far less is known regarding their roles in protecting the heart during other forms of cardiac stress.
Identification of candidate long noncoding RNAs associated with left ventricular hypertrophy.
Specimen part
View SamplesPlant BZR1-BAM transcription factors contain a -amylase (BAM)-like domain, characteristic of proteins involved in starch breakdown. The enzyme-derived domains appear to be non-catalytic, but determine the function of the Arabidopsis thaliana BZR1-BAMs (BAM7 and BAM8) during transcriptional initiation. Microarray experiments with plants overexpressing different mutant versions of the proteins show that only functional BZR1-BAM variants deregulate gene expression and cause leaf developmental abnormalities. Transcriptional changes caused by overexpression of the BZR1 domain alone indicate that the BAM domain increases selectivity for the preferred cis-regulatory element BBRE (BZR1-BAM Responsive Element).
The Enzyme-Like Domain of Arabidopsis Nuclear β-Amylases Is Critical for DNA Sequence Recognition and Transcriptional Activation.
Age, Specimen part, Treatment
View SamplesHere we compared the expression of an engineered kidney tissue, created by recombining an in vitro budded Wolffian duct with fresh E13 metanephric mesenchyme, with that of three in vivo rat embryonic kidney timepoints (E13, E18, and week 4)
Staged in vitro reconstitution and implantation of engineered rat kidney tissue.
No sample metadata fields
View SamplesPIWI interacting RNAs (piRNAs) provide defense against transposable element (TE) expansion in the germline of metazoans. piRNAs are processed from the transcripts encoded by specialized heterochromatic clusters enriched in damaged copies of transposons. How these regions are recognized as a source of piRNAs is still elusive. The aim of this study is to determine how transgenes that contain a fragment of the LINE-like I transposon lead to an acquired TE resistance in Drosophila. We show that such transgenes, being inserted in unique euchromatic regions which normally do not produce small RNAs, become de novo bidirectional piRNA clusters that silence I-element activity in the germline. Strikingly, small RNAs of both polarities are generated from the entire transgene and flanking genomic sequences — not only from the transposon fragment. Chromatin immunoprecipitation analysis shows that in ovaries the trimethylated histone 3 lysine 9 (H3K9me3) mark associates with transgenes producing piRNAs. We show that transgene-derived hsp70 piRNAs stimulate in trans cleavage of cognate endogenous transcripts with subsequent processing of the non-homologous parts of these transcripts into piRNAs. Overall design: The fractions of small RNAs (19-29 nt) from ovaries of wild type and 11 transgenic lines of Drosophila melanogaster were sequenced using Illumina HiSeq 2000.
De novo piRNA cluster formation in the Drosophila germ line triggered by transgenes containing a transcribed transposon fragment.
Specimen part, Subject
View Samples