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

ABSTRACT: Interactions between human keratinocytes and secreted factors from Staphylococcus aureus biofilm were investigated using microarray analysis. Relative to control cells, biofilm-secreted factors upregulated 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. Here we show that secreted factors from S. aureus biofilm cultures differentially impact several aspects of wound healing processes. Human keratinocytes were grown in co-culture with mature S. aureus biofilms for 24 hours. Keratinocytes exposed to S. aureus biofilm were analyzed in quadruplicate. Control cells were also analyzed in quadruplicate. Dye-swaps were performed.

ORGANISM(S): Homo sapiens

SUBMITTER: Kate McInnerney

PROVIDER: E-GEOD-24370 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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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. Secreted factors from S. aureus biofilm and planktonic cultures with equivalent population sizes were placed in contact with human foreskin keratinocytes for 4 hours. Keratinocytes were grown to ~90% confluency between passages 4-10.

2011-08-30 | E-GEOD-24118 | biostudies-arrayexpress

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

2011-08-31 | GSE24118 | GEO

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 were investigated using microarray analysis. Relative to control cells, biofilm-secreted factors upregulated 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. Here we show that secreted factors from S. aureus biofilm cultures differentially impact several aspects of wound healing processes.

2011-08-31 | GSE24370 | GEO

Inhibition of Staphylococcus aureus biofilm formation by gurmarin, a plant-derived cyclic peptide

Project description:Staphylococcus aureus is an opportunistic pathogen capable of causing various infections ranging from superficial skin infections to life-threatening severe diseases, including pneumonia and sepsis. This bacterium is attached to biotic and abiotic surfaces and forms biofilms that are resistant to conventional antimicrobial agents and clearance by host defenses. Infections associated with biofilms may result in longer hospitalizations, a need for surgery, and may even result in death. Agents that inhibit the formation of biofilms and virulence without affecting bacterial growth to avoid the development of drug resistance could be useful for therapeutic purposes. In this regard, we identified and isolated a small cyclic peptide, gurmarin, from a plant source that inhibited the formation of S. aureus biofilm without affecting the growth rate of the bacterium. We determined the gene expression of S. aureus biofilm treated with gurmarin and compared it to the untreated control biofilms. Differentially expressed genes were identified and their roles in the inhibition of S. aureus biofilms by gurmarin were analyzed.

2022-09-21 | E-MTAB-12154 | biostudies-arrayexpress

Phevalin (aureusimine B) production by Staphylococcus aureus biofilm and impacts on human keratinocyte gene expression

Project description:Staphylococcus aureus produces the cyclic dipeptides tyrvalin and phevalin (aureusimine A and B, respectively). A previous study reported that S. aureus mutants not capable of producing these compounds were less virulent in vivo through the deranged regulation of virulence factor genes. These findings, however, have been questioned as an unknown mutation in an operon that regulates virulence was discovered in the mutant strain. Here, we report that S. aureus biofilms produce greater amounts of phevalin than their planktonic counterparts. When administered to human keratinocytes, phevalin had no substantial effect on gene expression. Phevalin had no obvious impact on the extracellular metabolome of S. aureus. However, conditioned medium from S. aureus spiked with phevalin resulted in significant differences in keratinocyte gene expression compared to conditioned medium alone. A role for phevalin in manipulating host responses is apparent. Additionally, phevalin is a potential biomarker and/or therapeutic target for chronic, biofilm-based infections. Secreted factors from S. aureus biofilm and planktonic cultures with equivalent population sizes were placed in contact with human HaCaT keratinocytes for 4 hours. Keratinocytes were grown to ~90% confluency.

2012-10-01 | E-GEOD-32920 | biostudies-arrayexpress

Homo sapiens

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

| PRJNA130053 | ENA

Homo sapiens

Project description:Secreted Factors from Staphylococcus aureus Biofilm and Planktonic Cultures Differentially Impact Human Keratinocytes in vitro

| PRJNA132965 | ENA

Female adult to male adult comparison and 1st instar larvae to adult comparisons

Project description:This SuperSeries is composed of the following subset Series: GSE11363: Female adult hornfly gene expression vs male adult hornfly gene expression GSE11364: Hornfly 1st instar larvae vs pooled adult + egg Refer to individual Series

2010-05-26 | E-GEOD-11828 | biostudies-arrayexpress

Transcription profiling of human foreskin keratinocytes expressing E6 or E7 compared to normal keratinocytes reveals HPV16 E7 induces EMT

Project description:Gene expression data from human foreskin keratinocytes expressing E6 or E7 compared to normal keratinocytes.

2009-06-04 | E-MTAB-114 | biostudies-arrayexpress

Skin cancer-associated S. aureus downregulates DNA repair mechanisms, and promotes oxidative stress and DNA damage in human keratinocytes

Project description:Actinic keratoses (AK) are premalignant lesions common on photo-damaged skin that, over time, can progress to squamous cell carcinoma (SCC). A high bacterial load of Staphylococcus aureus is associated with AK and SCC but it is unknown whether this has a direct impact on skin cancer development. To determine whether S. aureus is able to trigger pro-tumorigenic skin responses, we performed RNAseq and shotgun proteomics on primary human keratinocytes after challenge with sterile culture supernatant (‘secretome’) from S. aureus clinical strains isolated from AK and SCC. Certain S. aureus secretomes induced keratinocytes to overexpress SCC biomarkers that have been associated with skin carcinogenesis, and upregulate the expression of enzymes linked with reduced skin barrier function. Further, S. aureus secretomes downregulated DNA repair mechanisms and induced oxidative stress markers. Subsequent experiments confirmed that exposure to SCC-derived S. aureus secretomes lead to increased intracellular ROS levels and DNA damage in primary human keratinocytes. Altogether, this study reveal a novel mechanism for the pro-tumorigenic activity of S. aureus. Further studies are required to determine whether S. aureus products promote SCC development in vivo, which would have important implications for the treatment of AK and prevention of SCC.

2022-05-11 | PXD031622 | Pride

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