The goals of the microarray experiment were to determine the role of MAF1, the Toxoplasma gondii mediator of host mitochondrial association, on host cell gene expression by comparing infection of WT cells with Type II and Type II:MAF1 parasites. We also explored the role of MAF1 on host cell gene expression by comparing profiles of WT and MAVS KO MEFs infected with Type I and Type Imaf1KO parasites.
Toxoplasma effector MAF1 mediates recruitment of host mitochondria and impacts the host response.
Specimen part, Time
View SamplesSummary:
HCaRG increases renal cell migration by a TGF-alpha autocrine loop mechanism.
No sample metadata fields
View SamplesHEK293 cells were transfected with control plasmid (pcDNAI/Neo;Invitrogen) or with the plasmid encoding HCaRG. Stable transfectants were synchronized and grown in the presence of 10% FBS for 48 h. Total RNAs were purified with the mini RNeasy kit (Qiagen).
HCaRG increases renal cell migration by a TGF-alpha autocrine loop mechanism.
No sample metadata fields
View SamplesThe SCL and LMO1 oncogenic transcription factors reprogram thymocytes into self-renewing pre-leukemic stem cells (pre-LSCs). Here we report that SCL directly interacts with LMO1 to activate the transcription of a self-renewal program coordinated by LYL1.
SCL, LMO1 and Notch1 reprogram thymocytes into self-renewing cells.
Age, Specimen part
View SamplesWe performed the circadian transcriptome analysis using the skeletal muscle from sedentary and exercised mice either in the early rest phase (ZT3) or in the early active phase (ZT15). By the combination with circadian transcriptomic and metabolomic analysis, we revealed time-of-day-dependent remodeling of circadian muscular metabolic pathways involved in glucose and glycerol metabolism after exercise. We found that only exercise in the early active phase elevates the levels of genes encoding glycolytic enzymes followed by the activation of fatty acid oxidation, branched-chain amino acid catabolism and ketogenesis/ketosis. This study demonstrates that time-of-day is a critical factor to modulate the impact of exercise on metabolic pathways within skeletal muscle. Overall design: Skeletal muscles from sedentary (sham-exercise) mice and mice subjected to acute treadmill exercise either in the early rest phase (ZT3) or in the early active phase (ZT15) were harvested after 0, 4, 8, 12, 16, and 20 hours after exercise or sham-exercise treatment.
Time of Exercise Specifies the Impact on Muscle Metabolic Pathways and Systemic Energy Homeostasis.
Sex, Specimen part, Cell line, Treatment, Subject
View SamplesThe Drosophila TRIM-NHL protein Brain tumor (Brat) plays important roles during early embryogenesis, in cell fate decisions, during neurogenesis and in mature neurons. Brat is an RNA-binding protein and functions as translational repressor. However, which RNAs Brat regulates and how RNA-binding specificity is achieved, is unknown. Using RNA-Immunoprecipitation we identify Brat-bound mRNAs in Drosophila embryos and define a consensus binding motif.
The Crystal Structure of the NHL Domain in Complex with RNA Reveals the Molecular Basis of Drosophila Brain-Tumor-Mediated Gene Regulation.
Specimen part
View SamplesBackground Alternative splicing (AS) is a central mechanism of genetic regulation which modifies the sequence of RNA transcripts in higher eukaryotes. AS has been shown to increase both the variability and diversity of the cellular proteome by changing the composition of resulting proteins through differential choice of exons to be included in mature mRNAs. Results In the present study, alterations to the global RNA splicing landscape of cellular genes upon viral infection were investigated through high-throughput RNA sequencing (RNA-seq) studies using mammalian reovirus as a model. Our study provides the first comprehensive portrait of global changes in the RNA splicing signatures that occur in eukaryotic cells following infection with a human virus. We identify modifications in the AS patterns of 240 cellular transcripts frequently involved in the regulation of gene expression and RNA metabolism. A significant number of the modified transcripts are also encoded by genes with important roles in viral infection/immunity. These modifications are expected to alter the functions of many cellular proteins. Finally, we used RT-PCR analysis in order to experimentally validate differential modifications in alternative splicing patterns that were observed through RNA-seq studies. Conclusion The present study demonstrated that viral infection can extensively modify the splicing patterns of numerous cellular transcripts. These findings provide additional insights into the complexity of virus-host interactions as these splice variants expand proteome diversity and function during viral infection. Finally, these data open new avenues of research for a better understanding of post-transcriptional events during virus infection and possible new targets toward the development of antiviral agents. Overall design: mRNAs were isolated from L929 mouse cell line, 14 hours after infection with T3D-S Reovirus or T3D-S Mutant reovirus at a MOI of 50. Control cells were uninfected. The resulting libraries were multiplexed and paired-end sequenced using Illumina HiSeq. Gene expression and alternative splicing were caracterized using Bowtie and RSEM.
Global Profiling of the Cellular Alternative RNA Splicing Landscape during Virus-Host Interactions.
Specimen part, Cell line, Subject
View SamplesFoxl2 is a forkhead transcription factor expressed only in the female, but not in the male gonad. We have created mice homozygous mutant for the Foxl2 gene (KO) as well as mice carrying a conditional mutant Foxl2 allele (floxed).
Somatic sex reprogramming of adult ovaries to testes by FOXL2 ablation.
Specimen part
View SamplesCNIs drastically modify the Treg specific transcriptional program in vivo in an IL-2 dependent manner
IL-2 therapy restores regulatory T-cell dysfunction induced by calcineurin inhibitors.
Specimen part, Treatment
View SamplesSteroid hormones regulate essential physiological processes and inadequate levels are associated with various pathological conditions. In testosterone-producing Leydig cells, steroidogenesis is strongly stimulated by LH via its receptor leading to increased cAMP production and expression of the steroidogenic acute regulatory (STAR) protein, which is essential for the initiation of steroidogenesis. Leydig cell steroidogenesis then passively decreases following the rapid degradation of cAMP into AMP by phosphodiesterases. In this study, we show that AMP-activated protein kinase (AMPK) is activated following cAMP breakdown in MA-10 and MLTC-1 Leydig cells. Activated AMPK then actively inhibits cAMP-induced steroidogenesis by repressing the expression of key regulators of steroidogenesis including Star and Nr4a1. Similar results were obtained in Y-1 adrenal cells and in the constitutive steroidogenic cell line R2C. Our data identify AMPK as an active repressor of steroid hormone biosynthesis in steroidogenic cells that is essential to preserve cellular energy and prevent excess steroid production.
A cell-autonomous molecular cascade initiated by AMP-activated protein kinase represses steroidogenesis.
Specimen part, Treatment
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