Young adult N2 Caenorhabditis elegans were infected with Enterococcus faecalis or Enterococcus faecium for 8 h to determine the transcriptional host response to each enterococcal species.
Both live and dead Enterococci activate Caenorhabditis elegans host defense via immune and stress pathways.
Specimen part, Treatment
View SamplesCohesinopathies are characterized by mutations in the cohesin complex. Mutations in NIPBL, a cohesin loader, result in Cornelia de Lange syndrome (CdLS). CdLS is a congenital genetic disorder distinguished by craniofacial dysmorphism, abnormal upper limb development, delayed growth, severe cognitive retardation, and multiple organ malformations.It has been suggested that CdLS is caused by defects in the cohesin network that alter gene expression and genome organization. However, the precise molecular etiology of CdLS is largely unclear. To gain insights, we sequenced mRNAs isolated from mouse embryonic fibroblasts of both WT and NIPBL-haploinsufficient mice and compared their transcriptomes. Overall design: Examination of gene expression of WT and NIPBL+/- mice by RNA-seq
NIPBL Controls RNA Biogenesis to Prevent Activation of the Stress Kinase PKR.
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View SamplesCondensin complexes are highly conserved for chromosome compaction to ensure their faithful segregation in mitosis. Condensin II is present in the nucleus throughout the cell cycle, including interphase. The aim of these experiments is to investigate the changes of gene expression in knockdown of NCAPH2, a condensin II subunit, in mouse embryonic stem cells compared to their control cells. Overall design: Examination of gene expression of controls and NCAPH2 knockdown cells by RNA-seq
Condensin II is anchored by TFIIIC and H3K4me3 in the mammalian genome and supports the expression of active dense gene clusters.
Specimen part, Subject
View SamplesTotal gene expression analysis was performed on RNA from testes extracted from two litters of constitutive homozygous and heterozygous H3f3b knockout mice compared to WT littermates.
Histone H3.3 regulates dynamic chromatin states during spermatogenesis.
Specimen part
View SamplesThe observation that Tcf3 (MGI name: Tcf7l1) bound the same genes as core stem cell transcription factors, Oct4 (MGI name:Pou5f1), Sox2 and Nanog, revealed a potentially important aspect of the poorly understood mechanism whereby Wnts stimulate self renewal of pluripotent mouse embryonic stem (ES) cells. Although the conventional view of Tcf proteins as the -catenin-binding effectors of Wnt signaling suggested Tcf3 should activate target genes in response to Wnts, here we show that Wnt3a and Tcf3 effectively antagonize each others effects on gene expression. Genetic ablation of Tcf3 caused similar effects as treating cells with recombinant Wnt3a.
Opposing effects of Tcf3 and Tcf1 control Wnt stimulation of embryonic stem cell self-renewal.
Treatment
View SamplesIdentifying the early gene program induced by GnRH would help understand how GnRH-activated signaling pathways modulate gonadotrope secretory response. We previously analyzed GnRH-induced early genes in LbT2 cells, however these lack GnRH self-potentiation, a physiological attribute of gonadotropes. To minimize cellular heterogeneity, rat primary pituitary cultures were enriched for gonadotropes by 40-60% using a sedimentation gradient. Given the limited number of gonadotropes, RNA was amplified prior to microarray analysis. Thirty-three genes were up-regulated 40 minutes after GnRH stimulation. Real-time PCR confirmed regulation of several transcripts including fosB, c-fos, egr-2 and rap1b, a small GTPase and member of the Ras family. GnRH stimulated rap1b gene expression in gonadotropes, measured by a sensitive single cell assay. Immunocytochemistry revealed increased Rap1 protein in GnRH-stimulated gonadotropes. These data establish rap1b as a novel gene rapidly induced by GnRH and a candidate to modulate gonadotropin secretion in rat gonadotropes.
Optimized amplification and single-cell analysis identify GnRH-mediated activation of Rap1b in primary rat gonadotropes.
Sex, Specimen part
View SamplesThis SuperSeries is composed of the SubSeries listed below.
Widespread DNA hypomethylation at gene enhancer regions in placentas associated with early-onset pre-eclampsia.
Specimen part
View SamplesThis SuperSeries is composed of the SubSeries listed below.
Endogenous mammalian histone H3.3 exhibits chromatin-related functions during development.
Specimen part
View SamplesWe investigated the DNA methylation and gene expression of 20 chorionic villi samples from early onset preeclampsia placentas to 20 gestational age matched controls. From this we were able to see a widespread disregulation in DNA methylation across a subset of genes in the genome. This may help to elucidate the underlying biological problems that lead to early onset preeclampsia. We noted that there were DNA methylation changes in many genes of importance as well as in different genomic elements such as enhancers.
Widespread DNA hypomethylation at gene enhancer regions in placentas associated with early-onset pre-eclampsia.
Specimen part
View SamplesTotal gene expression analysis was performed on CRE induced conditional knockout E12.5 MEFs relative to GFP infected control MEFs. Intent was to analyze the role of H3f3b in overall gene expression.
Endogenous mammalian histone H3.3 exhibits chromatin-related functions during development.
Specimen part
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