BRUCE was identified as a novel positive regulator of autophagy. By analyzing changes in mRNA levels, we wanted to determine whether BRUCE regulates autopahgy on a trancscriptional level. Overall design: Examination of changes in total mRNA levels comparing control (shRenilla) and BRUCE knockdown (shBruce) cells in full medium (FM) and starvation medium (Starv)
The IAP family member BRUCE regulates autophagosome-lysosome fusion.
Specimen part, Subject
View SamplesWe report the expression anaysis of neural stem cells lacking p53, ATMIN, or both. p53-deficent cells form GBM, which is significanly delayed in the absence of ATMIN.
Inactivation of the ATMIN/ATM pathway protects against glioblastoma formation.
Specimen part
View SamplesTemporal coordination of developmental programs is necessary for normal ontogeny, but the mechanism by which this is accomplished is poorly understood. We have previously shown that two components of the Mediator CDK8 module, CENTER CITY (CCT/MED12) and GRAND CENTRAL (GCT/MED13), are required for timing of pattern formation during embryogenesis in Arabidopsis.
The Arabidopsis Mediator CDK8 module genes CCT (MED12) and GCT (MED13) are global regulators of developmental phase transitions.
Specimen part
View SamplesWe used Affymetrix HG U133 Plus 2.0 GeneChips to compare the transcriptome of HS3ST2-transfected and control vector-transfected MDA-MB-231 cells.
HS3ST2 modulates breast cancer cell invasiveness via MAP kinase- and Tcf4 (Tcf7l2)-dependent regulation of protease and cadherin expression.
Specimen part, Cell line
View SamplesAcetyltransferases and histone deacetylases regulate gene expression at the level of chromatin, mainly by affecting transcription. In this study, we report that hyperacetylation induced by inhibition of histone deacetylases (HDACs) causes massive degradation of mRNA. The effect is promoter-independent and affects poly-A mRNA globally. HDAC inhibition leads to the removal of poly-A tails from mRNAs through activation of the deadenylase CAF1a, which we find to be acetylated together with its activator BTG2 by the histone acetyl transferases (HATs) p300 and CBP. By mutation of critical lysine residues, we provide evidence that acetylation of CAF1a and BTG2 induces enhanced poly-A mRNA degradation. Our study reveals a fundamental mechanism by which cells coordinate epigenetic and transcriptional control of gene expression with posttranscriptional control of poly-A mRNA stability. In this experiment, HeLa cells were exposed to the HDAC inhibitor trichostatin A (TSA) for 16 hours, followed by treatment with actinomycin D. Total RNA was isolated after 0, 2, 4 and 6 hours, and analysed by RNA sequencing. The half-lives of 7431 RNAs were calculated after normalization to rRNA (18S + 28S) levels. The experiment shows that TSA treatment causes a general reduction of poly-A RNA stability, while replication-dependent histone mRNA stability is not affected. Overall design: RNA half-lives were measured in TSA-treated or untreated HeLa cells by RNA-Seq using Illumina HiSeq 2000.
Acetylation-Dependent Control of Global Poly(A) RNA Degradation by CBP/p300 and HDAC1/2.
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View SamplesThis SuperSeries is composed of the SubSeries listed below.
Antiviral Protection via RdRP-Mediated Stable Activation of Innate Immunity.
Sex, Specimen part
View SamplesPreviously, we reported that mice made transgenic for a picornaviral RdRP the 3Dpol protein of Theilers murine encephalomyelitis virus (TMEV) suppress infection by diverse viral families. How the picornaviral RdRP transgene exerted antiviral protection in vivo was not known. To investigate the molecular mechanism, we determined gene expression profiles in spinal cords of WT and RdRP transgenic mice prior to (baseline) and after (2 days) infection with Encephalomyocarditis Virus (EMCV).
Antiviral Protection via RdRP-Mediated Stable Activation of Innate Immunity.
Sex
View SamplesPreviously, we reported that mice made transgenic for a picornaviral RdRP the 3Dpol protein of Theilers murine encephalomyelitis virus (TMEV) suppress infection by diverse viruses. Using mouse genetic studies, we determined that uninfected RdRP transgenic mice inherently induce an arsenel of prominent antiviral effectors and that this phenotype is MDA5-, MAVS- and IFNR-dependent. To determine the mechanism underlying MDA5 activation and induction of constitutive antiviral signaling by the picornaviral RdRP, we constructed mutant RdRP transgenes. First, we introduced pervasive, coding-neutral point mutations into the RdRP cDNA to maximally disrupt primary and secondary RNA structure (RdRPrna). Another mutant, RdRPcat, lacks catalytic activity due to alanine substitution of the key catalytic center triad aspartate residues (D233, D328, and D329), but is otherwise intact at the nucleotide and amino acid levels. The WT, RdRPrna, and RdRPcat versions of the RdRP transgenes were transduced with lentiviral vectors into human THP-1 monocytes, with RdRP mRNA transcription controlled by the Spleen Focus Forming Virus (SFFV) promoter. In parallel a control cell line transduced with a vector lacking any RdRP transgene (null THP-1) was generated.
Antiviral Protection via RdRP-Mediated Stable Activation of Innate Immunity.
Specimen part
View SamplesPreviously, we reported that mice made transgenic for a picornaviral RdRP the 3Dpol protein of Theilers murine encephalomyelitis virus (TMEV) suppress infection by diverse viruses. Using mouse genetic studies, we determined that uninfected RdRP transgenic mice inherently induce an arsenel of prominent antiviral effectors and that this phenotype is MDA5-, MAVS- and IFNR-dependent. To determine the mechanism underlying MDA5 activation and induction of constitutive antiviral signaling by the picornaviral RdRP, we constructed mutant RdRP transgenes. First, we introduced pervasive, coding-neutral point mutations into the RdRP cDNA to maximally disrupt primary and secondary RNA structure (RdRPrna). Another mutant, RdRPcat, lacks catalytic activity due to alanine substitution of the key catalytic center triad aspartate residues (D233, D328, and D329), but is otherwise intact at the nucleotide and amino acid levels. The WT, RdRPrna, and RdRPcat versions of the RdRP transgenes were transduced with lentiviral vectors into human THP-1 monocytes, with RdRP mRNA transcription controlled by the Spleen Focus Forming Virus (SFFV) promoter. In parallel a control cell line transduced with a vector lacking any RdRP transgene (null THP-1) was generated.
Antiviral Protection via RdRP-Mediated Stable Activation of Innate Immunity.
Specimen part
View SamplesPreviously, we reported that mice made transgenic for a picornaviral RdRP the 3Dpol protein of Theilers murine encephalomyelitis virus (TMEV) suppress infection by diverse viruses. Using mouse genetic studies, we determined that uninfected RdRP transgenic mice inherently induce an arsenel of prominent antiviral effectors and that this phenotype is MDA5-, MAVS- and IFNR-dependent. To determine the mechanism underlying MDA5 activation and induction of constitutive antiviral signaling by the picornaviral RdRP, we constructed mutant RdRP transgenes. First, we introduced pervasive, coding-neutral point mutations into the RdRP cDNA to maximally disrupt primary and secondary RNA structure (RdRPrna). Another mutant, RdRPcat, lacks catalytic activity due to alanine substitution of the key catalytic center triad aspartate residues (D233, D328, and D329), but is otherwise intact at the nucleotide and amino acid levels. The WT, RdRPrna, and RdRPcat versions of the RdRP transgenes were transduced with lentiviral vectors into human THP-1 monocytes, with RdRP mRNA transcription controlled by the Spleen Focus Forming Virus (SFFV) promoter. In parallel a control cell line transduced with a vector lacking any RdRP transgene (null THP-1) was generated.
Antiviral Protection via RdRP-Mediated Stable Activation of Innate Immunity.
Specimen part
View Samples