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RNA-seq comparing allergen-trained versus untrained human monocyte-derived macrophages

ABSTRACT: Mibrobial Patterns can induce trained innate immunity in macrophages. We tested whether innate memory can be elicited by stimulating macrophages with a house dust mite extract for 24h before washout, and analyzed the gene expression after 5 days post-exposure.

INSTRUMENT(S): NextSeq 500

ORGANISM(S): Homo sapiens

SUBMITTER: Julia Esser-von Bieren

PROVIDER: E-MTAB-9214 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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RNA-seq comparing allergen-trained versus untrained human monocyte-derived macrophages after HDM challenge

Project description:Mibrobial Patterns can induce trained innate immunity in macrophages. We tested whether innate memory can be elicited by stimulating macrophages with a house dust mite extract for 24h before washout and a resting phase of 5 days. Subsequently, macrophages were exposed to HDM for 24h and we analyzed the gene expression post-challenge.

2021-12-31 | E-MTAB-9210 | biostudies-arrayexpress

RNA-seq of human monocyte-derived macrophages comparing healthy versus house dust mite-allergic donors

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2021-12-31 | E-MTAB-9215 | biostudies-arrayexpress

Promoter targeted histone acetylation of chromatinized parvoviral genome is essential for infrection progress

Project description:The association of host histones with parvoviral DNA is poorly understood. We analyzed the chromatinization and histone acetylation of canine parvovirus DNA during infection by confocal imaging and in situ proximity ligation assay combined with chromatin immunoprecipitation and high-throughput sequencing. We found that at late infection parvovirus replication bodies were rich in histones bearing modifications characteristic of transcriptionally active chromatin, i.e. histone H3 lysine acetylation (H3K27ac). The H3K27ac, in particular, was located in close proximity to the viral DNA-binding protein NS1. Importantly, our results show for the first time that in the chromatinized parvoviral genome, particularly the two viral promoters were rich in H3K27ac. Histone acetyltransferase (HAT) inhibitorefficiently interfered with expression of viral proteins and infection progress. Altogether, our data suggest that acetylation of histones on parvoviral DNA is essential for viral gene expression and completion of viral life cycle. Examination of H3K27 acetylation in CPV infected and non-infected NLFK (Norden laboratory feline kidney) cells. Please note that the result in this study, considering the sequencing, is the fact that the viral genome is chromatinized. Processed data in this case would be the aligned read percentages in control cells (of which 0% aligns to parvoviral genome) and infected cells (of which ~9% only aligns to parvoviral genome and not to the cat genome), which is basically the output of the read aligner software without further processing steps (no peaks or regions were identified for the associated publication). Therefore no processed data was provided, and an exception to GEO processed data requirement was made.

2016-02-11 | E-GEOD-77785 | biostudies-arrayexpress

Function, targets and evolution of Caenorhabditis elegans piRNAs (mRNA)

Project description:piRNAs are required to maintain germline integrity and fertility but their mechanism of action is poorly understood. Here we demonstrate that C. elegans piRNAs silence transcripts in trans through imperfectly complementary sites. We find that target silencing is independent of Piwi endonuclease activity or “slicing”. Instead, we show that piRNAs initiate a localized secondary endogenous small interfering RNA (endo-siRNA) response. Endogenous protein-coding gene, pseudogene and transposon transcripts exhibit Piwi-dependent endo-siRNAs at sites complementary to piRNAs and are derepressed in Piwi mutants. Genomic loci of piRNA biogenesis are depleted of protein-coding genes but not pseudogenes or transposons. Our data suggest that nematode piRNA clusters are evolving to generate piRNAs against active mobile elements. Thus, piRNAs provide heritable, sequence-specific triggers for RNAi in C. elegans. Affymetrix mRNA expression data from wild-type and two independent prg-1;prg-2 double mutant C. elegans strains (mRNA)

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Gene expression analysis in mouse embryonic stem cells containing Î²-catenin lysine 49 to alanine mutation

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2017-03-21 | E-MTAB-5523 | biostudies-arrayexpress

mRNAseq of human sputum macrophages and alveolar-like monocyte-derived macrophages of healthy controls and NSAID-exacerbated respiratory disease (N-ERD) patients

Project description:NSAID-exacerbated respiratory disease (N-ERD) represents a particularly severe endotype of chronic rhinosinusitis with nasal polyps (CRSwNP), which affects around 10-16% of CRSwNP patients. N-ERD is characterized by severe and refractory nasal polyposis, bronchial asthma and intolerance to non-steroidal anti-inflammatory drugs (NSAIDs), including aspirin. Today, the pathogenesis of N-ERD remains incompletely understood and curative treatments are lacking. Macrophages are important source and target cells of arachidonic acid metabolites during type 2 inflammation, that have been neglected in N-ERD pathogenesis despite their presence in the nasal mucosa of N-ERD patients. Using a global transcriptomic approach, we identified systemic and local changes in macrophages between N-ERD patients and healthy controls. We isolated macrophages from induced sputum (sMac) and compared them to 7-days in vitro-differentiated, alveolar-like monocyte-derived macrophages (aMDM). Cells were lysed in RLT buffer with 1% beta-mercaptoethanol and stored at -80°C until RNA isolation and RNAseq. Since sMac yield of healthy controls was low, we pooled RNA of three donors (= sample S1) but excluded the data from subsequent analyses. Thus Analysis 1 shows the intra-group comparison of N-ERD sMac vs. N-ERD aMDM. In a second analysis (Analysis 2), we compared N-ERD aMDM vs. healthy control aMDM for transcriptome differences present in monocyte (blood)-derived cells.

2020-06-30 | E-MTAB-7965 | biostudies-arrayexpress

Chromatin IP sequencing of the nuclear factor HMGB1 in livers from mice after a metabolic stress either induced by a 12-week high fat diet consumption or a fasting (6hours)-refeeding (8hours) challenge.

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2022-03-31 | E-MTAB-11543 | biostudies-arrayexpress

De-novo assembly of transcriptome from the eggs and early embrios of Astropecten Aranciacus

Project description:This work describes the molecular mechanisms of meiotic maturation and cell cycle in the starfish Astropecten Aranciacus. The study has been conducted assembling a de-novo transcriptome from the different cellular stages: oocytes, egg, zygote and early embryos. Differential expression analysis followed by rtPCR are used to assess the validity of the assembly.

2017-08-22 | E-MTAB-5679 | biostudies-arrayexpress

Expression and functional validation of new p38α transcriptional targets in tumorigenesis

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