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Unknown,Transcriptomics,Genomics,Proteomics

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Global gene transcriptional profiles of RAW 264.7 cells following the infection with Brucella abortus wild and mutant strains

ABSTRACT: We focused on whether transposon mutagenesis in Brucella abortus could induce difference in the trascriptional responses of RAW 264.7 cell infection model compared to the wild strain infected RAW 264.7 cells. The function of genes in Brucella abortus was analyzed through the identified differences in gene expression between RAW 264.7 cell infected with wild and mutant strains. We analyzed altered transcription in RAW 264.7 cells at 0, 6, 12, and 24 h following the infection with 10 MOI of Brucella abortus wild and mutant strains.

ORGANISM(S): Mus musculus

SUBMITTER: Myunghwan Jung

PROVIDER: E-GEOD-79264 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Global gene transcriptional profiles of RAW 264.7 cells following the infection with Brucella abortus wild and mutant strains

Project description:We focused on whether transposon mutagenesis in Brucella abortus could induce difference in the trascriptional responses of RAW 264.7 cell infection model compared to the wild strain infected RAW 264.7 cells. The function of genes in Brucella abortus was analyzed through the identified differences in gene expression between RAW 264.7 cell infected with wild and mutant strains.

2016-03-16 | GSE79264 | GEO

Gene expression profiling of Brucella abortus-infected mouse macrophages

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RNA-seq study comparing gene expression of wild-type and B. abortus ∆baaR deletion strain

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GcrA binding pattern to Brucella abortus genome

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Transcription profiling of B. abortus BvrS BvrR from B. abortus 2308

Project description:The analysis of the expression profile of the two component system BvrR/BvrS of the B. abortus 2308 making the comparison of the expression of the B. abortus 2308 and B. abortus 2308 BvrR- (mutant in the gen BvrR) whit the microarray of brucella melitensis (Brucearray)

2010-04-22 | E-MEXP-2564 | biostudies-arrayexpress

RNA-seq based transcriptinal profiling of intracellular Brucella abortus and Brucella abortus-infected murine macrophages

Project description:We describe the isolation of sufficient Brucella abortus RNA from primary host cell environment using modified reported methods for RNA-seq analysis, and simultaneously characterize the transcriptional profiles of intracellular B. abortus and bone marrow-derived macrophages (BMM) from BALB/c mice at 24 h (replicative phase) post-infection.

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Brucella abortus ChipSeq analysis of BvrR

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Expression Data from Brucella abortus strain 2308 and isogenic mucR mutant cells

Project description:MucR is one of the few transcriptional regulatory proteins that has been linked to Brucella pathogenesis. We used custom-made Affymetrix B. abortus strain 2308 derived GeneChips to copare the gene expression properties of wild type and isogenic mucR mutant cells.

2012-12-01 | GSE40532 | GEO

RNase and sRNA activity in Brucella abortus

Project description:Isogenic deletion and truncation of specific genes encoding RNases in Brucella abortus were analyzed for changes in gene expression. The main goal of this work is to determine the mRNAs that exhibit dysregulation when small regulatory RNAs (i.e., Bsr8) or RNases (i.e., RNaseE and RNaseJ) are invactivated in Brucella abortus. Small regulatory RNAs often control gene expression by binding directly to mRNAs to block translation or induce their degradation, and RNA from a deletion of one sRNA gene, bsr8, was analyzed to uncover the mRNAs that may be controlled by BsrB. RNases are enzymes that cleave RNAs during processing, turnover, and regulatory events, and RNaseE and RNaseJ appear to be important for B. abortus virulence. Therefore, to determine the mRNAs potentially targetd by these RNases, RNA from a strain harboring a RNaseE truncation and a strain carrying a deletion of rnaseJ were analyzed. In the end, the objective of this study was to gain insight into the regulatory patterns of specific B. abortus sRNAs and RNases.

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Proteomic Analysis of Stationary Growth Stage and Nutritional Deficiency Adaptation Reveals Brucella Abortus Virulence Mechanisms

Project description:Brucellosis, an important bacterial zoonosis caused by Brucella species, has drawn increased attention around the world. As an intracellular pathogen, the ability of Brucella to deal with stress within the host cell is closely related to its virulence. The survival pressure on Brucella within a phagosome is considered similar to that during the stationary phase. Here, label-free proteomics approach was used to study the adaptive response of Brucella abortus (B. abortus) in the stationary stage. 182 down-regulated and 140 up-regulated proteins were found in the stationary-phase B. abortus. B. abortus adapted to adverse environmental changes by regulating virulence, reproduction, transcription, translation, stress response, and energy production. In addition, both logarithmic and stationary-phase B. abortus were treated with short-term starvation. The logarithmic-phase B. abortus restricted cell reproduction and energy utilization in response to nutritional stress. Additionally, the expression levels of some virulence-related proteins were identified as being significantly regulated during the transition from logarithmic to stationary phase or under starvation treatment, such as Type IV secretion system protein (T4SS), VjbR, and integration host factor (IHF). Altogether, we outlined adaptive mechanisms that B. abortus could employ during the growth and compared the differences between logarithmic and stationary-phase B. abortus in response to starvation.

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