Browse
Submit Data
Databases
API
Help

Dataset Information

0 Views

0 Connections

0 Citations

0 Reanalyses

0 Downloads

Omics score: 0

Alternative splicing changes in A. fumigatus sensitized mice

ABSTRACT: Dysregulation of alternative splicing of mRNA precursors is known to contribute to numerous human diseases. In this study we carried out the first systematic search for asthma-associated changes in alternative splicing events, using a model of Aspergillus fumigatus (A. fumigatus)-sensitized mice and an exon junction microarray to detect potential changes in alternative splicing. One of the sensitization-associated changes identified in the search was a shift in alternative splicing of the mRNA encoding cFLIP, a modulator of the caspase- mediated extrinsic apoptosis pathway. Expanding these studies to human asthma patients, we discovered a significant decrease in the expression of both cFLIP isoforms in severe corticosteroid- resistant asthmatics. Although it is unclear whether these changes were due solely to differences in alternative splicing, these findings provide evidence that dysregulation of the extrinsic apoptosis pathway is part of the underlying immunopathogenesis of severe refractory asthma.

ORGANISM(S): Mus musculus

PROVIDER: GSE28258 | GEO | 2014/01/14

SECONDARY ACCESSION(S): PRJNA139571

REPOSITORIES: GEO

ACCESS DATA

Json Xml

Dataset's files

Source:

			Action	DRS
		Other

Items per page:

1 - 1 of 1

Similar Datasets

Alternative splicing changes in A. fumigatus sensitized mice

Project description:Dysregulation of alternative splicing of mRNA precursors is known to contribute to numerous human diseases. In this study we carried out the first systematic search for asthma-associated changes in alternative splicing events, using a model of Aspergillus fumigatus (A. fumigatus)-sensitized mice and an exon junction microarray to detect potential changes in alternative splicing. One of the sensitization-associated changes identified in the search was a shift in alternative splicing of the mRNA encoding cFLIP, a modulator of the caspase- mediated extrinsic apoptosis pathway. Expanding these studies to human asthma patients, we discovered a significant decrease in the expression of both cFLIP isoforms in severe corticosteroid- resistant asthmatics. Although it is unclear whether these changes were due solely to differences in alternative splicing, these findings provide evidence that dysregulation of the extrinsic apoptosis pathway is part of the underlying immunopathogenesis of severe refractory asthma. The technical side of the microarray experiment was essentially the Illumina protocol.

2014-01-14 | E-GEOD-28258 | biostudies-arrayexpress

Mus musculus

Project description:Alternative splicing changes in A. fumigatus sensitized mice

| PRJNA139571 | ENA

Transcriptome sequencing reveals aberrant alternative splicing in Huntington's disease

Project description:Huntingtonâs disease (HD) is an autosomal dominant neurodegenerative disorder caused by a CAG expansion in the gene encoding Huntingtin (HTT). Transcriptome dysregulation is a major feature of HD pathogenesis, as revealed by a large body of work on gene expression profiling of tissues from human HD patients and mouse models. These studies were primarily focused on transcriptional changes affecting steady-state overall gene expression levels using microarray based approaches. A major missing component however has been the study of transcriptome changes at the post-transcriptional level, such as alternative splicing. Alternative splicing is a critical mechanism for expanding regulatory and functional diversity from a limited number of genes, and is particularly complex in the mammalian brain. Here we carried out a deep RNA-seq analysis of 7 human HD brains and 7 controls to systematically discover aberrant alternative splicing events and characterize potential associated splicing factors in HD. We identified 593 differential alternative splicing events between HD and control brains. Using an expanded panel of 54 brain tissues from patients and controls, we also identified 9 splicing factors exhibiting significantly altered expression levels in HD patient brains. Moreover, follow-up molecular analyses of one splicing factor PTBP1 revealed its impact on disease-associated splicing patterns in HD. Collectively, our data provide genomic evidence for widespread splicing dysregulation in HD brains, and suggest the role of aberrant alternative splicing in the pathogenesis of HD RNA-seq analysis of the BA4 motor cortex of 7 control and 7 Huntington's disease patients. 1.5 ug of total RNA was used for RNA-seq library preparation using the TruSeqâ¢ Stranded mRNA LT Sample Prep Kit (Illumina). 100x2 bp paired-end RNA-seq reads were generated on a HiSeq 2000 sequencer.

2016-06-14 | E-GEOD-79666 | biostudies-arrayexpress

Functional genomics of Aspergillus fumigatus conidiospores interacting with human bronchial epithelial cells

Project description:The cells of the airway epithelium play critical roles in host defense to inhaled irritants, and in asthma pathogenesis. These cells are constantly exposed to conidiospores of the ubiquitous mould Aspergillus fumigatus, which are small enough to reach the alveoli. This exposure is asymptomatic in most individuals but can be associated with a spectrum of diseases ranging from asthma and allergic bronchopulmonary aspergillosis to aspergilloma and invasive aspergillosis. Airway epithelial cells have been shown to internalize A. fumigatus conidiospores in vitro, but the implications of this process for pathogenesis remain unclear. We have developed a cell culture model for this interaction using the 16HBE cell line and a transgenic A. fumigatus strain expressing green fluorescent protein. The transcriptional profiles of A. fumigatus conidiospores incubated in the presence or absence of human cells were compared, revealing significant changes in fungal gene expression in response to conidial interaction with cells. Gene expression levels were investigated in A. fumigatus conidiospores incubated in the presence or absence of 16HBE cells for 6 hours. Four independent samples were analysed for each of these conditions, using JCVI PFGRC Aspergillus fumigatus Version 3 microarrays, with a dye-swap experimental design.

2011-06-01 | E-GEOD-16630 | biostudies-arrayexpress

Functional genomics of Aspergillus fumigatus conidiospores interacting with human bronchial epithelial cells

2011-06-01 | GSE16630 | GEO

Functional genomics of human bronchial epithelial cells interacting with conidiospores of Aspergillus fumigatus

Project description:The cells of the airway epithelium play critical roles in host defense to inhaled irritants, and in asthma pathogenesis. These cells are constantly exposed to conidiospores of the ubiquitous mould Aspergillus fumigatus, which are small enough to reach the alveoli. This exposure is asymptomatic in most individuals but can be associated with a spectrum of diseases ranging from asthma and allergic bronchopulmonary aspergillosis to aspergilloma and invasive aspergillosis. Airway epithelial cells have been shown to internalize A. fumigatus conidiospores in vitro, but the implications of this process for pathogenesis remain unclear. We have developed a cell culture model for this interaction using the 16HBE cell line and a transgenic A. fumigatus strain expressing green fluorescent protein. Comparing the transcriptional profiles of control cells and cells exposed to A. fumigatus conidiospores using Agilent Whole Human Genome microarrays revealed significant changes in gene expression in response to the presence of conidiospores. The identification of biologically relevant responses validates this methodology, and motivates further work to characterize the interactions between A. fumigatus conidiospores and primary airway epithelial cells of normal and asthmatic origins.

2011-06-01 | GSE16628 | GEO

Caspase-10 is a negative regulator of caspase-8-mediated cell death with gene inductive properties

Project description:Formation of the Death-Inducing Signalling Complex (DISC) initiates the extrinsic apoptotic signalling cascade. Caspase-8 and its regulator cFLIP control death signalling by binding to the receptor via DISC-bound FADD. By elucidating the function of Caspase-10, a close homologue of caspase-8, we unexpectedly found that caspase-10 negatively regulates caspase-8-mediated cell death signalling in the DISC. We demonstrate that caspase-10 inhibits the activation of caspase-8 independent of cFLIP. Furthermore, we show that caspase-8 does not compete with other tandem DED proteins such as cFLIP or caspase-10 in binding via FADD to the receptor as current models suggest. By utilizing caspase-8 knockout cells, we demonstrate that caspase-8 has to be placed upstream of both cFLIP and caspase-10 in the DISC. We further show that DISC formation and/or stability depends on caspase-8 but is independent from its enzymatic activity. Surprisingly, we identified caspase-10 to rewire DISC-signalling to NF-kB activation and cell survival. Our data are consistent with a model in which caspase-10 and cFLIP co-ordinately regulate caspase-8-mediated cell death signalling.

2016-04-20 | GSE75365 | GEO

Functional genomics of human bronchial epithelial cells interacting with conidiospores of Aspergillus fumigatus

Project description:The cells of the airway epithelium play critical roles in host defense to inhaled irritants, and in asthma pathogenesis. These cells are constantly exposed to conidiospores of the ubiquitous mould Aspergillus fumigatus, which are small enough to reach the alveoli. This exposure is asymptomatic in most individuals but can be associated with a spectrum of diseases ranging from asthma and allergic bronchopulmonary aspergillosis to aspergilloma and invasive aspergillosis. Airway epithelial cells have been shown to internalize A. fumigatus conidiospores in vitro, but the implications of this process for pathogenesis remain unclear. We have developed a cell culture model for this interaction using the 16HBE cell line and a transgenic A. fumigatus strain expressing green fluorescent protein. Comparing the transcriptional profiles of control cells and cells exposed to A. fumigatus conidiospores using Agilent Whole Human Genome microarrays revealed significant changes in gene expression in response to the presence of conidiospores. The identification of biologically relevant responses validates this methodology, and motivates further work to characterize the interactions between A. fumigatus conidiospores and primary airway epithelial cells of normal and asthmatic origins. Gene expression levels were investigated in 16HBE cells incubated in the presence or absence of A. fumigatus conidiospores for 6 hours. Four independent cell samples were analysed for each of these conditions, using Agilent Whole Human Genome microarrays, with a one-colour experiemntal design.

2011-06-01 | E-GEOD-16628 | biostudies-arrayexpress

Transcriptome sequencing reveals aberrant alternative splicing in Huntington's disease

Project description:Huntington’s disease (HD) is an autosomal dominant neurodegenerative disorder caused by a CAG expansion in the gene encoding Huntingtin (HTT). Transcriptome dysregulation is a major feature of HD pathogenesis, as revealed by a large body of work on gene expression profiling of tissues from human HD patients and mouse models. These studies were primarily focused on transcriptional changes affecting steady-state overall gene expression levels using microarray based approaches. A major missing component however has been the study of transcriptome changes at the post-transcriptional level, such as alternative splicing. Alternative splicing is a critical mechanism for expanding regulatory and functional diversity from a limited number of genes, and is particularly complex in the mammalian brain. Here we carried out a deep RNA-seq analysis of 7 human HD brains and 7 controls to systematically discover aberrant alternative splicing events and characterize potential associated splicing factors in HD. We identified 593 differential alternative splicing events between HD and control brains. Using an expanded panel of 54 brain tissues from patients and controls, we also identified 9 splicing factors exhibiting significantly altered expression levels in HD patient brains. Moreover, follow-up molecular analyses of one splicing factor PTBP1 revealed its impact on disease-associated splicing patterns in HD. Collectively, our data provide genomic evidence for widespread splicing dysregulation in HD brains, and suggest the role of aberrant alternative splicing in the pathogenesis of HD

2016-06-14 | GSE79666 | GEO

ALS-causative mutations in FUS/TLS confer gain- and loss-of-function by altered association with SMN and U1-snRNP

Project description:The RNA-binding protein FUS/TLS, mutation in which is causative of the fatal motor neuron disease ALS, is demonstrated to directly bind to the U1-snRNP and SMN complexes. ALS-causative mutations in FUS/TLS are shown to abnormally enhance their interaction with SMN and reduce interaction with U1-snRNP. Correspondingly, global RNA analysis reveals a mutant-dependent loss of splicing activity, with ALS-linked mutants failing to reverse changes caused by loss of wild-type FUS/TLS. Furthermore, a common FUS/TLS mutant-associated RNA splicing signature is identified in ALS patient fibroblasts. Taken together, our studies establish potentially converging disease mechanisms in ALS and spinal muscular atrophy, with ALS-causative mutants acquiring properties representing both gain (dysregulation of SMN) and loss (reduced RNA processing mediated by U1-snRNP) of function. RNA-mediated oligonucleotide Annealing, Selection, and Ligation with Next-Generation sequencing (RASL-seq) method was used for analyzing alternative splicing changes. Oligonucleotide probes are designed to anneal to the exon-exon junctions. The probe library was assembled to assess 5530 unique alternative splicing events, most of which were exon inclusion or skipping, with a minority for alternative 5’- or 3’- splice sites. The splicing changes were compared among groups of reducing FUS/TLS or SMN levels, or expressing various FUS mutations to determine the loss versus gain of FUS/TLS function on splicing regulation.

2015-02-10 | E-GEOD-64078 | biostudies-arrayexpress

OmicsDI is part of the ELIXIR infrastructure

OmicsDI is an Elixir interoperability service. Learn more ›

Tweets

OmicsDI Databases

PRIDE
PeptideAtlas
MassIVE
JPOST Repository
Physiome Model Repository

EGA
EVA
ENA
LINCS
PAXDB
Cell Collective

MetaboLights
Metabolomics Workbench
MetabolomeExpress
GNPS
BioModels
FAIRDOMHub

ArrayExpress
dbGaP
ExpressionAtlas
GEO
NODE

Information

Databases
Help
API
Contact us
Code on GitHub
Terms of use
Submit Data