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Metabolomics,Unknown,Transcriptomics,Genomics,Proteomics

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Characterization of a bacterial tyrosine kinase in Porphyromonas gingivalis involved in polymicrobial synergy

ABSTRACT: RNA-Seq of wild-type Porphyromonas gingivalis compared to ΔPGN_1524 mutant Illumina based RNA-Seq was used to probe transcriptome differences between wild-type Porphyromonas gingivalis and ΔPGN_1524 mutant

ORGANISM(S): Porphyromonas gingivalis ATCC 33277

SUBMITTER: David Beck

PROVIDER: E-GEOD-55192 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Characterization of a bacterial tyrosine kinase in Porphyromonas gingivalis involved in polymicrobial synergy

Project description:RNA-Seq of wild-type Porphyromonas gingivalis compared to ΔPGN_1524 mutant

2014-07-19 | GSE55192 | GEO

Porphyromonas gingivalis gene expression during co-culture with Treponema denticola

Project description:Porphyromonas gingivalis and Treponema denticola are periodontalpathogens that are associated with the severity and progression of periodontal diseases. This study investigates the gene expression of Porphyromonas gingivalis during co-culture with Treponema denticola

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Treponema denticola gene expression during co-culture with Porphyromonas gingivalis

Project description:Porphyromonas gingivalis and Treponema denticola are periodontalpathogens that are associated with the severity and progression of periodontal diseases. this study investigates the gene expression of Treponema denticola during co-culture with Porphyromonas gingivalis.

2014-03-31 | E-MTAB-2257 | biostudies-arrayexpress

9 human epithelial cell transcriptome sequencing analysis

Project description:We report the study of the mechanism of action of Porphyromonas gingivalis on human oral epithelial cells based on high-throughput sequencing technology. By acting Porphyromonas gingivalis and its metabolites on human oral epithelial cells separately, the mechanism of Porphyromonas gingivalis evading immune surveillance and causing local and deep tissue diffusion to induce systemic diseases was studied. This study provides a framework for studying the pathogenic mechanism of Porphyromonas gingivalis.

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Strand-specific transcriptome profiles of the oral pathogen Porphyromonas gingivalis using genomic tiling microarray and RNA sequencing

Project description:High-density tiling microarray and RNA sequencing technologies were used to analyze the transcriptome of Porphyromonas gingivalis. The compiled P. gingivalis transcriptome were based on total RNA samples isolated from three different laboratory culturing conditions and the strand-specific transcription profiles generated covered the entire genome including both protein coding and non-coding regions. The transcription profiles revealed various operon structures, 5' and 3' end untranslated regions (UTRs), differential expression patterns, and several not-yet annotated transcripts within intergenic and antisense regions. Further transcriptome analysis identified the majority of the genes to be expressed within operons and most 5' and 3' ends to be protruding UTRs of which several 3M-CM-"M-BM-^@M-BM-^Y UTRs were extended to overlap genes encoded on the opposite/antisense strand. Extensive antisense RNAs were identified opposite to most of insertion sequence (IS) elements. With the growing realization that non-coding RNAs play important biological functions, the comprehensive transcriptome profiles compiled in this study are of great value for the further understanding of gene regulation and virulence mechanism in this periodontal pathogen. The transcriptome profiles can be viewed at and downloaded from the 'Microbial Transcriptome Database' web site http://bioinformatics.forsyth.org/mtd. 3 total RNA samples from growing P. gingivalis strain W83 under different media conditions subjected to RNA-Seq.

2011-10-01 | E-GEOD-30452 | biostudies-arrayexpress

Role of PG1626 in Porphyromonas gingivalis ATCC33277

Project description:Wild type Porphyromonas gingivalis strain ATCC33277 (V3176) and PG1626 - deficient mutant (V3177) were grown in iron replete conditions was used to compare to Porphyromonas gingivalis strains grown in iron chelated conditions.

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Comparative expression profile of Porphyromonas gingivalis parent strain W83 and the HU protein (PG0121) mutant during exponential growth in rich medium.

Project description:HU protein regulates expression of genes involved in cell-division, iron acquisition, and transcriptional regulation in Porphyromonas gingivalis Analysis involved RNA extracted from the parent strain W83 and the PG0121 (HU protein) mutant during exponential growth in rich medium. Each of the four experiments used a different preparation of RNA. Comparative expression profiles were determined by hybridizing the microarray slide with a mixture containing equal amount of cDNA generated from each strain. Dye swap experiments were performed.

2011-11-30 | E-GEOD-34009 | biostudies-arrayexpress

Polyphenols from Myrothamnus flabellifolia Welw. inhibit in vitro adhesion of Porphyromonas gingivalis and exert anti-inflammatory cytoprotective effects in KB cells

Project description:Investigation of whole genome gene expression level changes in Porphyromonas gingivalis ATCC 33277 treated with an anti-adhesive extract from Myrothamnus flabellifolia compared to the untreated strain. Aim: Identification of anti-adhesive plant extracts against cell surface binding of Porphyromonas gingivalis. Materials and Methods: Polyphenol-enriched extract from Myrothamnus flabellifolia (MF) traditionally used for periodontitis was tested for inhibition of P. gingivalis adhesion to KB cells by FACS, for influence on gingipain activity, hemagglutination and by microarray analysis for effects on the bacterial transcriptome. P. gingivalis-induced inflammation parameters were monitored by RT-PCR. Results: MF (100 µg/ml) reduced P. gingivalis adhesion/invasion about 50% by interacting with fimbriae and bacterial OMPs. Microarray analysis of MF-treated bacteria indicated up-regulation of genes involved in cell adhesion. As confirmed by RT-PCR, fimbrillin- and Arg-gingipain-encoding genes were upregulated by MF. On the protein level, inhibition (70%) of Arg-gingipain activity was observed, while the corresponding Lys-gingipain was hardly influenced. MF also inhibited hemagglutination. While exposure to P. gingivalis resulted in an increased expression of inflammation-related genes in KB cells, pretreatment of KB cells with MF evoked cytoprotective effects concerning IL-1β, IL-6, IL-8 and TNFα gene expression as well as IL-6 release rates. Conclusions: While being cytoprotective, MF exerts strong anti-adhesive effects against P. gingivalis. Thus, MF may be useful for the prevention of P. gingivalis-associated periodontal diseases. The chip study used total RNA recovered from two separate MF-treated and two separate untreated Porphyromonas gingivalis ATCC 33277 cultures. Each chip measured the expression level of 1,842 genes from P. gingivalis ATCC 33277 with thirteen 60-mer probes per gene, with three-fold technical redundancy.

2010-09-02 | E-GEOD-23939 | biostudies-arrayexpress

Pathogenesis research of tumorigenesis and progression of colorectal cancer modulated by gingipains secreted by Porphyromonas gingivalis

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Effect of infection with Aggregatibacter actinomycetemcomitans or Porphyromonas gingivalis on primary murine bone marrow-derived dendritic cells

Project description:To determine the biological mechanisms underlying a dampened immune response to Porphyromonas gingivalis, as compared to Aggregatibacter actinomycetemcomitans challenge, we infected primary BMDCs with either pathogen or left uninfected Total RNA from uninfected BMDCs compared to BMDCs infected with either Aggregatibacter actinomycetemcomitans or Porphyromonas gingivalis

2013-01-11 | E-GEOD-41383 | biostudies-arrayexpress

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