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Regulated expression of polysaccharide utilization and capsular biosynthesis loci in biofilm and planktonic Bacteroides thetaiotaomicron during growth in chemostats

ABSTRACT: We used Affymetrix GeneChips to determine the physiological differences between biofilm and planktonic cells of Bacteroides thetaiotaomicron strain VPI-5482 (ATCC 29148) by comparing gene expression. For this purpose, B. thetaiotaomicron cells were grown in sterile, continuous flow bioreactors fed with tryptone, yeast extract, glucose (TYG) medium. The bioreactors were controlled at a temperature of 37C using a water jacket and a recirculating water heater. After 8 hours post-inoculation, planktonic cells were harvested from the bulk solution in the bioreactor, and after 8 days post-inoculation, the biofilm was scraped from the carbon paper. RNA was harvested from both biofilm and planktonic populations. RNA was extracted by a phenol:chloroform method and purified with a Qiagen RNA Easy mini-kit. Overall growth conditions are summarized above. The experimental conditions were: biofilm (BF), and planktonic (PL).

ORGANISM(S): Bacteroides thetaiotaomicron VPI-5482

SUBMITTER: Michaela TerAvest

PROVIDER: E-GEOD-38534 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Regulated expression of polysaccharide utilization and capsular biosynthesis loci in biofilm and planktonic Bacteroides thetaiotaomicron during growth in chemostats

Project description:We used Affymetrix GeneChips to determine the physiological differences between biofilm and planktonic cells of Bacteroides thetaiotaomicron strain VPI-5482 (ATCC 29148) by comparing gene expression. For this purpose, B. thetaiotaomicron cells were grown in sterile, continuous flow bioreactors fed with tryptone, yeast extract, glucose (TYG) medium. The bioreactors were controlled at a temperature of 37C using a water jacket and a recirculating water heater. After 8 hours post-inoculation, planktonic cells were harvested from the bulk solution in the bioreactor, and after 8 days post-inoculation, the biofilm was scraped from the carbon paper. RNA was harvested from both biofilm and planktonic populations. RNA was extracted by a phenol:chloroform method and purified with a Qiagen RNA Easy mini-kit.

2014-01-01 | GSE38534 | GEO

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Secreted Factors from Staphylococcus aureus Biofilm and Planktonic Cultures Differentially Impact Human Keratinocytes, in vitro

Project description:Interactions between human keratinocytes and secreted factors from Staphylococcus aureus biofilm and planktonic cultures were investigated using microarray analysis. Relative to planktonic secreted factors, biofilm secreted factors up regulated cytokine and chemokine genes in keratinocytes. Genes associated with DNA damage and oxidative stress were also induced in keratinocytes treated with secreted factors from S. aureus biofilm. Here we show that secreted factors from S. aureus planktonic (PCM) and biofilm (BCM) cultures differentially impact several aspects of wound healing processes.

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Haemophilus parasuis F9 transcriptome in biofilm and planktonic cultures using RNA sequencing

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Expression changes during Candida albicans biofilm formation

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Expression changes during Candida albicans biofilm formation

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Transcriptomics analysis during the transient ceftazidime tolerance of Burkholderia pseudomallei

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Transcriptomic regulation of acidic biofilms by Candida albicans Sfl1

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A landscape of cellular aggregation of Rhizobium etli CFN42 by a transcriptomic approach

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