Browse
Submit Data
Databases
API
Help

Dataset Information

0 Views

0 Connections

0 Citations

0 Reanalyses

0 Downloads

Omics score: 0

Global gene expression profiling of Ehrlichia ruminantium virulent and attenuated strains

ABSTRACT: The obligate intracellular bacterium, Ehrlichia ruminantium (ER) is the causal agent of Heartwater, a fatal disease in ruminants. It is transmitted by ticks of the genus Amblyomma. Here, we report the genomic comparative and the global transcriptional profile of 4 strains of ER, Gardel and Senegal, two distant virulent strains with their corresponding attenuated strains. Our results showed a higher metabolic activity in attenuated strains compared to virulent strains, suggesting a better adaptation in vitro of attenuated strains to the host cells. There was a strong modification of membrane protein encoding genes expression for the 4 strains. A major over-expression of map1-related genes was observed for virulent strains, whereas attenuated strains over-expressed genes encoding for hypothetical membrane proteins. This result suggests that in vivo, MAP-1 related proteins could induce non-protective immune responses for virulent strains. For the attenuated strains, the lack of expression of map1-related genes and over-expression of other membrane proteins encoding genes could be important in induction of efficient immune responses.The diminution of expression of many genes in attenuated Senegal was caused by severe mutation. One of them, the gene recO is involved in DNA repair and its mutation could explain the higher proportion of mutated genes in attenuated Senegal, inducing the faster attenuation of Senegal compared to Gardel.

ORGANISM(S): Ehrlichia ruminantium

PROVIDER: GSE55726 | GEO | 2016/05/01

SECONDARY ACCESSION(S): PRJNA240789

REPOSITORIES: GEO

ACCESS DATA

Json Xml

Dataset's files

Source:

			Action	DRS
		Other

Items per page:

1 - 1 of 1

Similar Datasets

Transcriptional response of bovine macrophages after infection with two Argentinean Mycobacterium bovis isolates

2012-11-28 | GSE39819 | GEO

Comparative Genomic Hybridizations of Mycoplasma gallisepticum Vaccine strains and strain Rlow

Project description:Genomic content of Vaccine strains were probed against the known sequence of the virulent strain Rlow of M. gallisepticum to identify divergent or absent genes in the attenuated strains.

2009-12-24 | GSE19629 | GEO

Transcriptional response of bovine macrophages after infection with two Argentinean Mycobacterium bovis isolates

Project description:Infection of cattle with Mycobacterium bovis causes severe financial hardship in many countries, in addition to presenting a health risk for humans. As an intracellular pathogen, M. bovis, adapted to survive and thrive within the intramacrophage environment. However, little is known about expression patterns in the macrophage, particularly in the bovine host. In this study, DNA microarray analysis was used to detect genes expressed in Holstein bovine macrophages derived from peripheral blood mononuclear cells infected during four hours with two Argentinean strains of M. bovis, a virulent strain, 04-303 and an attenuated strain, 534. Genes encoding antrax toxin receptor, cell division and apoptosis regulator, ankyrin proteins that are found within the membrane associated cytoskeleton, protein of cell differentiation and regulators of endocytic traffic of membrane were more strongly expressed in infected macrophages. Blood from healthy Holstein bovines was taken in sterile conditions and peripheral blood mononuclear cells (PBMC) were separated from heparinized blood. PBMCs were used to prepare ten independent cultures which were incubated at 37C for one week in RPMI 1640 complete medium supplemented with 10% of autologous plasma. Four cultures were infected with viable cells of M. bovis virulent strain 04-303, four with avirulent strain 534 and two were left as uninfected controls. Four hours post infection, the cells were scraped, lysed. RNA was extracted, labeled and hybridized to ten Affymetrix Bovine Genome arrays.

2012-11-28 | E-GEOD-39819 | biostudies-arrayexpress

Mus musculus

Project description:Host Genes Differentially Expressed by Virulent and Attenuated Strains of Japanese Encephalitis Virus

| PRJNA103331 | ENA

Transcription profiling of mouse kidney following infection with virulent or attenuated strains of Candida albicans

Project description:Comparison of transcriptional responses of the mouse kidney to infections by virulent or attenuated strains of Candida albicans

2009-10-01 | E-MEXP-1458 | biostudies-arrayexpress

Comparative transcriptome analysis of geographically distinct virulent and attenuated Babesia bovis

Project description:Geographical distinct virulent Babesia bovis strains have similar gene expression changes as they go through attenuation. Pair end RNA-sequencing reads on three biological replicate sample pairs of virulent parent and attenuated derivative Babesia bovis strain isolated in Argentina.

2013-10-23 | E-GEOD-51560 | biostudies-arrayexpress

Comparative gene expression profiling analysis of RNA-seq data for bovine macrophages infected with two Myocbacterium bovis strains of variable virulence and co-cultured with autologous lymphocytes.

Project description:In this study we compared the transcriptome of bovine macrophages infected with two Mycobacterium bovis strains of variable virulence, co-cultured with autologous lymphocytes. We used the highly virulent M. bovis strain called Mb04-303 and the attenuated Mb534 strain. We first observed that only the infection of bovine macrophages with the virulent strain, Mb04-303, induced in peripheral bovine mononuclear cells a powerful innate immune response capable of controlling the intracellular mycobacterial replication.By RNAseq analysis we found that infections with Mb04-303 downregulated the KEAP1-NFE2L2 pathway that encodes a transcriptional factor involved in antioxidant genes and inflammasome activation and upregulated the type 1 interferon signalling pathway, compared to the infections with the attenuated Mb534 strain. T

2023-09-14 | GSE241059 | GEO

Quantitative proteomic and phosphoproteomic analysis of H37Ra and H37Rv strains of Mycobacterium tuberculosis

Project description:Mycobacterium tuberculosis, the causative agent of tuberculosis accounts for 1.5 million annual deaths worldwide. The two well-characterized strains of the parental H37 strain namely, H37Ra and H37Rv show different pathogenic phenotypes. In order to identify factors that are responsible for virulence, we compared the proteome and the phosphoproteome profiles of virulent (H37Rv) and virulence attenuated (H37Ra) strains of M. tuberculosis. Quantitative proteomic analysis resulted in the identification and quantitation of 2,709 proteins and 505 phosphosites. Comparative analysis revealed over 5-fold overexpression of several proteins associated with virulence. Our data indicates that there are definable molecular differences between H37Rv and H37Ra strains at both the proteome and phosphoproteome levels which may explain the virulence and phenotypic differences.

2017-05-08 | PXD004161 | Pride

Ehrlichia ruminantium

Project description:Global gene expression profiling of Ehrlichia ruminantium virulent and attenuated strains

| PRJNA240789 | ENA

An alliance of gel-based and gel-free proteomic techniques displays substantial insight into the proteome of a virulent and an attenuated Histomonas meleagridis strain

Project description:The current work aimed to detect and identify significant differentially expressed proteins between a virulent and an attenuated Histomonas meleagridis strain which were in vitro co-cultivated with Escherichia coli DH5alpha. This was done by applying 2D-DIGE and sequential window acquisition of all theoretical spectra (SWATH) MS as tools on the two well-defined strains. In the gel-based experiments, 49 identified protein spots were found to be differentially expressed, of which 37 belonged to the in vitro cultivated virulent strain and 12 to the attenuated one. The most frequently identified proteins in the virulent strain take part in cytoskeleton formation, carbohydrate metabolism and adaptation to stress. However, post-translationally modified or truncated ubiquitous cellular proteins such as actin and GAPDH were identified as upregulated in multiple gel positions. This indicated their contribution to processes not related to cytoskeleton and carbohydrate metabolism, such as fibronectin or plasminogen binding. On the other hand, proteins involved in cytoskeleton, cell division and cytoskeleton organization were frequently observed in the attenuated strain. The findings of the gel-based studies were supplemented by the gel-free SWATH MS analysis, which identified and quantified 42 significantly differentially regulated proteins. In this case proteins with peptidase activity, metabolic proteins and actin-regulating proteins were the most frequent findings in the virulent strain, while proteins involved in hydrogenosomal carbohydrate metabolism dominated the results in the attenuated one.

2018-12-10 | PXD009316 | Pride

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