GEO DataSets

(Submitter supplied) Mastitis is an inflammation of the mammary gland (MG), usually due to bacterial infection. Although considerable attention has been paid to this economically important disease, the early stages of the host response remain poorly defined. In particular, it is unclear how mammary epithelial cells (MEC), a first barrier against pathogens, respond to infection. Indeed, it is difficult to differentiate between the contributions of MEC and infiltrating immune cells to gene expression profiles of mammary tissue during mastitis. more...

Organism:

Capra hircus; Ovis aries

Type:

Expression profiling by array

Platform:

GPL10427

20 Samples

Download data: TXT

(Submitter supplied) Differential response of bovine mammary epithelial cells to Staphylococcus aureus or Escherichia coli agonists of the innate immune system. Mastitis caused by Escherichia coli and Staphylococcus aureus is a major pathology of dairy cows. To better understand the differential response of the mammary gland to these two pathogens, we stimulated bovine mammary epithelial cells (bMEC) with either E. coli crude lipopolysaccharide (LPS) or with S. more...

Organism:

Bos taurus

Type:

Expression profiling by array

Platform:

GPL17231

32 Samples

Download data: TXT

(Submitter supplied) Background: Staphylococcus aureus is a major pathogen of humans and animals. Host genetics influence the susceptibility to S. aureus infections, and genes determining infection outcome remain to be identified. Here, we used outbred animals from a divergent selection on susceptibility towards Staphylococcus infection to explore host immunogenetics. Methodology/Principal Findings: We investigated in vitro how mammary epithelial cells (MEC) respond to live S. more...

Organism:

Ovis aries

Type:

Expression profiling by array

Platform:

GPL10427

118 Samples

Download data: TXT

(Submitter supplied) Mastitis in dairy cattle can result from infection by a range of microorganisms but is principally caused by coliform bacteria and gram positive bacteria such as Staphylococcus aureus (S. aureus). The former species are often acquired by environmental contamination while S. aureus is particularly problematic due to its resistance to antibiotic treatments and ability to reside within mammary tissue in a chronic, subclinical state. more...

Organism:

Bos taurus

Type:

Expression profiling by array

Platform:

GPL6082

36 Samples

Download data: GPR

(Submitter supplied) Mastitis in dairy cattle can result from infection by a range of microorganisms but is principally caused by coliform bacteria and gram positive bacteria such as Staphylococcus aureus (S. aureus). The former species are often acquired by environmental contamination while S. aureus is particularly problematic due to its resistance to antibiotic treatments and ability to reside within mammary tissue in a chronic, subclinical state. more...

Organism:

Bos taurus

Type:

Expression profiling by array

Platform:

GPL6082

12 Samples

Download data: GPR

(Submitter supplied) Mastitis in dairy cattle can result from infection by a range of microorganisms but is principally caused by coliform bacteria and gram positive bacteria such as Staphylococcus aureus (S. aureus). The former species are often acquired by environmental contamination while S. aureus is particularly problematic due to its resistance to antibiotic treatments and ability to reside within mammary tissue in a chronic, subclinical state. more...

Organism:

Bos taurus

Type:

Expression profiling by array

Platform:

GPL6082

12 Samples

Download data: GPR

(Submitter supplied) Mastitis in dairy cattle can result from infection by a range of microorganisms but is principally caused by coliform bacteria and gram positive bacteria such as Staphylococcus aureus (S. aureus). The former species are often acquired by environmental contamination while S. aureus is particularly problematic due to its resistance to antibiotic treatments and ability to reside within mammary tissue in a chronic, subclinical state. more...

Organism:

Bos taurus

Type:

Expression profiling by array

Platform:

GPL6082

12 Samples

Download data: GPR

(Submitter supplied) Infections of the udder by Escherichia coli very often elicit acute inflammation, while Staphylococcus aureus infections tend to cause mild, subclinical inflammation and persistent infections. The molecular causes undercovering the different disease patterns are poorly understood. We therefore profiled kinetics and extent of global changes in the transcriptome of primary bovine mammary epithelia cells (MEC) subsequent to challenging them with heat inactivated preparations of E. more...

Organism:

Bos taurus

Type:

Expression profiling by array

Dataset:

GDS4406

Platform:

GPL2112

30 Samples

Download data: CEL

Analysis of mammary epithelial cells (MECs) challenged with heat-killed particles of E. coli or S. aureus for up to 24 hrs. Results provide insight into the molecular mechanisms underlying the pathogen-specific disease patterns.

Organism:

Bos taurus

Type:

Expression profiling by array, transformed count, 4 stress, 5 time sets

Platform:

GPL2112

Series:

GSE25413

30 Samples

Download data: CEL

(Submitter supplied) Staphylococci are major pathogens in humans and animals and emerging antibiotic-resistant strains have further increased the importance of this health issue. The existence of a genetic basis of host response to bacterial infections has been widely documented but the underlying mechanisms and genes are still largely unknown. Previously, two divergent lines of sheep selected on their milk somatic cell count called high and low SCS lines, have been showed to be respectively more and less susceptible to intra mammary infections (IMI). more...

Organism:

Ovis aries

Type:

Expression profiling by array

Platform:

GPL10427

44 Samples

Download data

(Submitter supplied) Mastitis is a multietiological complex disease, which is defined as inflammation of parenchyma of mammary glands. Bacterial infection is the predominant cause of mastitis, though fungal, viral and mycoplasma infections also have been reported. Based on severity of the disease, mastitis can be classified into- subclinical, clinical and chronic forms. Bacterial pathogens from the fresh cow milk were isolated and classified by standard microbiological tests and multiplex PCR. more...

Organism:

Mus musculus

Type:

Expression profiling by array

Platform:

GPL13381

4 Samples

Download data: TXT

(Submitter supplied) Establishment of an in vitro system to explore molecular mechanisms of mastitis susceptibility in cattle by comparative expression profiling of Escherichia coli and Staphylococcus aureus inoculated primary cells sampled from cows with different genetic predisposition for somatic cell score Primary bovine mammary gland epithelial cells (pbMEC) were sampled from the udder parenchyma of cows that were selected for high and low mastitis susceptibility by applying a marker assisted selection strategy considering QTL and molecular marker information of a repetitively confirmed QTL for SCS in the telomeric region on BTA18 The cells were cultivated and subsequently inoculated with heat inactivated mastitis pathogens Escherichia coli and Staphylococcus aureus, respectively. more...

Organism:

Bos taurus

Type:

Expression profiling by array

Dataset:

GDS4437

Platform:

GPL2112

88 Samples

Download data: CEL

Mammary gland epithelial cells of cows with favorable somatic cell score (SCS) QTL allele Q and unfavorable allele q after S. aureus or E.coli exposure for up to 24 hours. SCS is an indicator of milk quality and udder health. Results provide insight into molecular basis of mastitis susceptibility.

Organism:

Bos taurus

Type:

Expression profiling by array, count, 2 genotype/variation, 3 protocol, 3 time sets

Platform:

GPL2112

Series:

GSE24560

88 Samples

Download data: CEL

(Submitter supplied) Outcome and resolution of an udder inflammation (mastitis) depends on the type of the invading pathogen. Gram-negative pathogens, such as Escherichia coli mostly trigger strong inflammation and full local activation of the immune defense eventually resulting in pathogen elimination. Staphylococcus aureus and other Gram-positive pathogens elicit only weak immune reactions possibly allowing for pathogen persistence. more...

Organism:

Bos taurus

Type:

Expression profiling by array

Platform:

GPL17645

49 Samples

Download data: CEL

(Submitter supplied) Background Our objective was to compare mammary tissue gene expression profiles during a Streptococcus uberis (S. uberis) mastitis challenge between lactating cows subjected to dietary-induced negative energy balance (NEB; n = 5) and cows fed ad libitum to maintain positive energy balance (PEB; n = 5). The NEB cows were feed-restricted to 60% of calculated net energy for lactation requirements for 7 d, and cows assigned to PEB were fed the same diet for ad libitum intake. more...

Organism:

Bos taurus

Type:

Expression profiling by array

Platform:

GPL8776

40 Samples

Download data: TXT

(Submitter supplied) RNA-seq was performed by infecting primary mammary epithelial cells (pMECs) with both gram negative (E.coli) and gram positive bacteria (S. aureus). Using stringent pipeline, a set of 1957 known and 1175 novel lncRNAs were identified, among which, 112 lncRNAs were found differentially expressed in bacteria challenged PMECs compared with the control.

Organism:

Capra hircus

Type:

Expression profiling by high throughput sequencing

Platform:

GPL19149

7 Samples

Download data: TXT