GEO DataSets

(Submitter supplied) Staphylococcus aureus is an opportunistic pathogen that colonizes the anterior nares of about 30-50% of the population. Colonization is most often asymptomatic, however, self-inoculation through inhalation, ingestion, or an open wound, can give rise to potentially fatal infections of the deeper tissues and blood. Like all bacteria, S. aureus is able to sense and respond to environmental cues and modify gene expression to adapt to specific environmental conditions. more...

Organism:

Staphylococcus aureus

Type:

Expression profiling by high throughput sequencing

Platform:

GPL25144

9 Samples

Download data: XLSX

(Submitter supplied) Staphylococcus aureus is a pathogenic bacterium but also a commensal of skin and anterior nares in humans. As S. aureus transits from skins/nares to inside the human body, it experiences changes in temperature. The production and content of S. aureus extracellular vesicles (EV) have been increasingly studied over the past few years and EVs are increasingly being recognized as important to the infectious process. more...

Organism:

Staphylococcus aureus

Type:

Expression profiling by high throughput sequencing

Platform:

GPL28116

6 Samples

Download data: XLSX

(Submitter supplied) In vivo comparison of the expression profiles in S. aureus colonizing the human nose

Organism:

Staphylococcus aureus

Type:

Expression profiling by high throughput sequencing

Platform:

GPL19006

6 Samples

Download data: XLS

(Submitter supplied) Investigation of mRNA expression level changes in a Staphylococcus aureus Mu50 delta-SAV1322 mutant, compared to the wild-type strain. A comparison of the wild-type and the mutant transcription profiles

Organism:

Staphylococcus aureus subsp. aureus Mu50

Type:

Expression profiling by array

Platform:

GPL22334

8 Samples

Download data: PAIR

(Submitter supplied) Purpose: The goal of this study was to identify Staphylococcus aureus genes which are important during establishment of metastatic infections in bloodstream infections. Methods: Pooled mariner transposon mutant libraries were generated as previously described (PMID: 27185949). The libraries were sequenced on the Illumina HiSeq 2500 platform with the transposon-specific oligonucleotide primer Himar1-Seq. more...

Organism:

Staphylococcus aureus

Type:

Expression profiling by high throughput sequencing

Platform:

GPL19006

12 Samples

Download data: CSV

(Submitter supplied) S. aureus biofilms are associated with the organism's ability to cause disease. Biofilm associated bacteria must cope with the host's innate immune system. We used commercially available Affymetrix S. aureus GeneChips to compare the gene expression properties of 4 and 6 day established biofilms following short (1 hr)- and long (24 hr)- term exposure to macrophages and neutrophils.

Organism:

Staphylococcus aureus

Type:

Expression profiling by array

Platform:

GPL1339

35 Samples

Download data: CEL, CHP

(Submitter supplied) Microarray expression profiling of S. aureus lavaged from murine lungs after residence times between 30 minutes and 6 hours compared to post-exponential phase or early log phase growth in Luria-Betani broth.

Organism:

Staphylococcus aureus

Type:

Expression profiling by array

Platform:

GPL4047

21 Samples

Download data: CEL

(Submitter supplied) Staphylococcus aureus is an important cause of human skin and soft tissue infections (SSTIs) globally. Notably, 80% of all SSTIs are caused by S. aureus, of which ~63% are abscesses and/or cellulitis. Although progress has been made, our knowledge of the host and pathogen factors that contribute to the pathogenesis of SSTIs is incomplete. To provide a more comprehensive view of this process, we monitored changes in the S. more...

Organism:

Staphylococcus aureus; Staphylococcus aureus subsp. aureus USA300

Type:

Expression profiling by array

Platform:

GPL8069

7 Samples

Download data: CEL, CHP

(Submitter supplied) The genome sequence is the “blue-print of life”, but proteomics is required to relate this blue-print of life to the actual physiology of living cells. Because of their low complexity – only about 2.000 proteins make a Staphylococcus aureus cell viable – bacteria are excellent model systems to identify the entire protein assembly of a living organism. Many of the studies on physiological proteomics of bacteria, however, still rely on 2D gel-based technologies that visualize only a minor part of the proteome. more...

Organism:

Staphylococcus aureus subsp. aureus NCTC 8325; Staphylococcus aureus subsp. aureus MW2; Staphylococcus aureus subsp. aureus COL; Staphylococcus aureus; Staphylococcus aureus subsp. aureus Mu50; Staphylococcus aureus subsp. aureus N315; Staphylococcus aureus subsp. aureus MRSA252; Staphylococcus aureus subsp. aureus MSSA476; Staphylococcus aureus subsp. aureus USA300

Type:

Expression profiling by array

Platform:

GPL7137

4 Samples

Download data: TXT

(Submitter supplied) Previous evaluation by different molecular and physiological assays of Staphylococcus aureus (S. aureus) responses to heat shock exposure yielded a still fragmentary view of the mechanisms determining bacterial survival or death at supra-physiological temperatures. This study analyzed diverse facets of S. aureus heat-shock adjustment by recording global transcriptomic and metabolic responses of bacterial cultures shifted for 10 min from 37oC to a sub-lethal (43oC) or eventually lethal (48oC) temperature. more...

Organism:

Staphylococcus aureus

Type:

Expression profiling by array

Platform:

GPL3931

6 Samples

Download data: TXT

(Submitter supplied) CC30 S. aureus were subjected to NO stress and Anaerobic growth and produced different transcriptomes

Organism:

Staphylococcus aureus

Type:

Expression profiling by high throughput sequencing

Platform:

GPL19006

30 Samples

Download data: TXT

(Submitter supplied) The Staphylococcus aureus two-component regulatory system, SrrAB, coordinates hypoxic responses during in vitro growth conditions. S. aureus Affymetrix GeneChips were used to compare S. aureus expression properties of wild type and isogenic ssrA mutant cells during aerobic growth conditions. S. aureus Affymetrix GeneChips were also used to compare the S. aureus expression properties of wild type and isogenic ssrA mutant cells during hypoxic growth conditions. more...

Organism:

Staphylococcus aureus

Type:

Expression profiling by array

Platform:

GPL1339

8 Samples

Download data: CEL, CHP

(Submitter supplied) The opportunistic pathogen, Staphylococcus aureus, encounters a wide variety of fluid shear levels within the human host, which may play a key role in dictating whether this organism adopts a commensal interaction with the host or transitions to cause disease. Using rotating-wall vessel bioreactors to create a physiologically-relevant, low fluid shear environment, S. aureus was evaluated for cellular responses that could impact its colonization and virulence. more...

Organism:

Staphylococcus aureus; Staphylococcus aureus subsp. aureus N315

Type:

Expression profiling by array

Platform:

GPL1339

4 Samples

Download data: CEL, CHP

(Submitter supplied) Staphylococcus aureus is a Gram-positive opportunistic pathogen, which is carried by approximately 30 % of the population at any time. In addition to being a commensal S. aureus can cause an array of infections, ranging from mild skin and soft tissue infections to life threatening endocarditis and septicemia. S. aureus encodes a variety of virulence factors that facilitate its pathogenic lifestyle. Genes encoding these virulence factors are under tight control by a complex regulatory network, which includes, sigma factors, sRNAs, and protein-based systems, such as Two-Component Systems (TCS). Previous work in our lab demonstrated that overexpression of the sRNA tsr37 leads to an increase in cellular aggregation in the absence of host serum. We determined that the clumping phenotype was dependent on a previously unannotated 88 amino acid protein encoded within the tsr37 sRNA transcript (which we named ScrA for S. aureus clumping regulator A). In addition to increased clumping, overexpression of ScrA also leads to increased biofilm formation. To investigate the mechanism of action of ScrA we performed mass spectrometry proteomics and RNA-sequencing in the ScrA overexpressing strain. A variety of virulence factors, including several surface adhesins were upregulated while several proteases were downregulated. Moreover, results showed a significant upregulation of the SaeRS two component system, suggesting that ScrA is influencing SaeRS activity. We go on to demonstrate that overexpression of ScrA in a saeR mutant abrogates the clumping/biofilm phenotypes confirming that ScrA functions via the Sae system. Finally, we identified the ArlRS TCS as a potential positive regulator of scrA expression. Collectively our results show that ScrA is an activator of the SaeRS system and suggests that ScrA may act as an intermediary between the ArlRS and SaeRS systems.

Organism:

Staphylococcus aureus

Type:

Expression profiling by high throughput sequencing

Platform:

GPL18481

6 Samples

Download data: XLSX

(Submitter supplied) The host protein calprotectin inhibits the growth of a variety of bacterial pathogens through metal sequestration in a process known as 'nutritional immunity'. Staphylococcus aureus growth is inhibited by calprotectin in vitro and calprotectin is localized in vivo to staphylococcal abscesses during infection. However, the staphylococcal adaptations that provide defense against nutritional immunity and the role of metal-responsive regulators are not fully characterized. more...

Organism:

Staphylococcus aureus

Type:

Other

Platform:

GPL19006

10 Samples

Download data: XLSX

(Submitter supplied) The host protein calprotectin inhibits the growth of a variety of bacterial pathogens through metal sequestration in a process known as 'nutritional immunity'. Staphylococcus aureus growth is inhibited by calprotectin in vitro and calprotectin is localized in vivo to staphylococcal abscesses during infection. However, the staphylococcal adaptations that provide defense against nutritional immunity and the role of metal-responsive regulators are not fully characterized. more...

Organism:

Staphylococcus aureus

Type:

Expression profiling by high throughput sequencing

Platform:

GPL27158

36 Samples

Download data: XLSX

(Submitter supplied) Staphylococcus aureus is an important human pathogen that causes life-threatening infections, and is resistant to the majority of our antibiotic arsenal. This resistance is complicated by the observation that most antibacterial agents target actively growing cells, thus, proving ineffective against slow growing populations, such as cells within a biofilm or in stationary phase. Recently, our group generated updated genome annotation files for S. more...

Organism:

Staphylococcus aureus

Type:

Expression profiling by high throughput sequencing

Platform:

GPL19476

2 Samples

Download data: XLSX

(Submitter supplied) Better understanding of S. aureus throat colonization in the presence of other competing/coexisting microbes may provide insight into S. aureus adaptation to the human throat and recurrence of infection. In this work, we explore the responses triggered by the encounter between two common throat bacteria, S. aureus and S. anginosus, in the presence of human tonsillar epithelial cells. We performed an in vitro coculture experiment followed by RNA sequencing. more...

Organism:

Staphylococcus aureus

Type:

Expression profiling by high throughput sequencing

Platform:

GPL28116

12 Samples

Download data: FASTA, TXT

(Submitter supplied) Background: Staphylococcus aureus is a major pathogen of humans and animals and rapidly emerging antibiotic-resistant strains have further increased the severity of this health issue. Host genetics influence susceptibility to S. aureus infections, and genes determining infection outcome should be identified to analyze immune-based therapies as an alternative to antibiotics. Here, we used outbred animals from a divergent selection on susceptibility towards Staphylococcus infection to explore host immunogenetics. more...

Organism:

Ovis aries

Type:

Expression profiling by array

Platform:

GPL10427

44 Samples

Download data

(Submitter supplied) Nasal colonization is well described; however, we have limited knowledge about S. aureus throat colonization. The main objective of this project was to explore differentially expressed genes (DEGs) in S. aureus throat isolate TR145 exposed for 1 or 3 hours (h) to human tonsil epithelial cells (HTEpiC) by using RNA sequencing (RNA-seq) and pathway analysis. We have shown the suitability of using HTEpiC as an in vitro model for investigating key determinants in S. more...

Organism:

Staphylococcus aureus

Type:

Expression profiling by high throughput sequencing

Platform:

GPL28116

14 Samples

Download data: FASTA, TXT