Project description:Several oral bacterial species were grown anaerobically and fed either glucose or lactate in SHI medium (for method see: Edlund et al., 2013, Edlund et al, 2015 - see http://www.microbiomejournal.com/content/pdf/2049-2618-1-25.pdf & http://www.nature.com/ismej/journal/vaop/ncurrent/full/ismej201572a.html). Biofilm samples for LCMS were collected at different time points from growth wells. After growth was established in SHI medium, biofilms were washed with minimal medium and supplemented with either glucose or lactate (Veillonella species) (see Edlund et al., 2013, Edlund et al., 2015). Samples were collected both after the initial biofilm establishment in SHI medium and after the addition of the supplemented cdm medium. According to gnps network analyses and data sorting exercises: 1) ~10% of this data is reproducible; 2) several of the present masses can also be detected both in SHI and cdm medium. mzXML files for media is not uploaded here (i.e. no media subtraction can be employed using these files only).
Project description:We present here a transcriptional regulator, PA3898, which controls biofilm formation and multidrug efflux-pumps in P. aeruginosa. A mutant of this regulator significantly reduced the ability of P. aeruginosa to produce biofilm in vitro, and affected its in vivo fitness and pathogenesis in Drosophila melanogaster and BALB/c mouse lung infection models. Transcriptome analysis revealed that PA3898 modulates essential virulence genes/pathways, including multidrug efflux-pumps and phenazine biosynthesis.ChIP-seq identified its DNA binding sequences and confirmed PA3898 directly interacts with promoter regions of four genes/operons, two of which are mexAB-oprM and phz2.
Project description:This study compared the subgingival microbiota of subjects with periodontitis to those with periodontal health using the Human Oral Microbe Identification Microarray (HOMIM).
Project description:The planktonic versus biofilm gene expression arrays were performed in a/alpha cell types. Gene expression arrays were performed on planktonic vs biofilm cells grown in Spider medium at 37C. Normalized data is reported in matrix.
Project description:We investigated the association between subgingival bacterial profiles and gene expression patterns in gingival tissues of patients with periodontitis.
