Ovis aries
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ABSTRACT:
PROVIDER: PRJNA132179 | ENA |
REPOSITORIES: ENA
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Project description: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). Transcriptional profiling of milk somatic cells (MSC) of high and low SCS sheep infected successively by S. epidermidis and S. aureus was performed to provide enhanced knowledge about the genetic basis of differential host response to IMI with Staphylococci. Gene expression in MSC of high and low SCS sheep collected 12h post-challenge was performed on a 15K gene ovine oligoarray (Agilent). MSC were mainly neutrophils. The high number of differentially expressed genes between the two bacterial strains indicated, among others, increased number of T-cells in MSC after S. aureus, compared to S. epidermidis challenge. Differential regulation of 366 genes between resistant and susceptible animals was largely associated with immune and inflammatory response (including pathogen recognition TLR2 pathway and cell migration), signal transduction, cell proliferation and apoptosis. Close biological connection between most of differentially expressed genes into Ingenuity Pathway Analysis networks further indicated consistency between the genes that were differentially-expressed between resistant and susceptible animals. Gene profiling in high and low SCS sheep provided strong candidates for biological pathway and gene underlying genetically determined resistance and susceptibility towards Staphylococci infections opening new fields for further investigation. Keywords: Staphylococcus epidermidis, Staphylococcus aureus, milk somatic cells, mammalian, transcriptome, immunity, mastitis 22 samples in a two-colour dye-swap experimental design
2011-09-30 | E-GEOD-24925 | biostudies-arrayexpress
Project description: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). Transcriptional profiling of milk somatic cells (MSC) of high and low SCS sheep infected successively by S. epidermidis and S. aureus was performed to provide enhanced knowledge about the genetic basis of differential host response to IMI with Staphylococci. Gene expression in MSC of high and low SCS sheep collected 12h post-challenge was performed on a 15K gene ovine oligoarray (Agilent). MSC were mainly neutrophils. The high number of differentially expressed genes between the two bacterial strains indicated, among others, increased number of T-cells in MSC after S. aureus, compared to S. epidermidis challenge. Differential regulation of 366 genes between resistant and susceptible animals was largely associated with immune and inflammatory response (including pathogen recognition TLR2 pathway and cell migration), signal transduction, cell proliferation and apoptosis. Close biological connection between most of differentially expressed genes into Ingenuity Pathway Analysis networks further indicated consistency between the genes that were differentially-expressed between resistant and susceptible animals. Gene profiling in high and low SCS sheep provided strong candidates for biological pathway and gene underlying genetically determined resistance and susceptibility towards Staphylococci infections opening new fields for further investigation. Keywords: Staphylococcus epidermidis, Staphylococcus aureus, milk somatic cells, mammalian, transcriptome, immunity, mastitis
2011-10-01 | GSE24925 | GEO
Project description:Transcriptome analysis in sheep Milk Somatic Cells
| PRJNA350511 | ENA
Project description:We have completed the high quality reference genome for domestic sheep (Oar v3.1) and performed a detailed survey of gene expression across different tissues. RNA-seq data of 7 tissue types from the reference female Texel and skin tissue from a Gansu alpine fine wool sheep were sequenced.
2014-06-06 | GSE56643 | GEO
Project description:We have completed the high quality reference genome for domestic sheep (Oar v3.1).
2014-06-06 | GSE56644 | GEO
Project description:We have completed the high quality reference genome for domestic sheep (Oar v3.1) and performed a detailed survey of gene expression across different tissues. RNA-seq data of 7 tissue types from the reference female Texel and skin tissue from a Gansu alpine fine wool sheep were sequenced. Here is the part of the RNA-seq data sequenced in BGI, including 7 tissue types from the reference female Texel and skin type from a Gansu alpine fine wool sheep.
2014-06-06 | E-GEOD-56643 | biostudies-arrayexpress
Project description:We have completed the high quality reference genome for domestic sheep (Oar v3.1). Early-stage Illumina GA sequence platform sequenced less reads in high GC content regions than in other regions. To read through higher GC content regions, we generated 2 Gb MeDIP-seq data for filling gaps in sheep reference genome assembly.
2014-06-06 | E-GEOD-56644 | biostudies-arrayexpress
Project description:The study reports a differential proteomic analysis of the Mediterranean buffalo milk to evaluate the changes induced by Staphylococcus spp. during a subclinical intramammary infection (IMI). A number of 12 quarter milk samples, 6 of which with somatic cell count (SCC) < 50,000 cells/mL and culture-negative, and the other 6 with SCC ˃ 3,000,000 cells/mL and culture-positive to Staphylococcus aureus (SAU, n=3), SAU, or non-aureus staphylococci (NAS, n=3) was selected. Samples were analyzed using a shotgun proteomics approach, based on filter-aided sample preparation (FASP) followed by LC-MS/MS and label-free analysis. Here, the largest buffalo milk protein dataset described so far was reported. Moreover, the results demonstrated that staphylococcal IMI mostly affected proteins involved in structural functions and in innate immune defense, with changes in their abundance that were generally more intense in SAU than in NAS samples. Further, an increase in the abundance of different cathelicidins was observed, as already reported for other animals with mastitis disease (1,2). (1) Addis MF, Pisanu S, Marogna G, Cubeddu T, Pagnozzi D, Cacciotto C, et al. Production and release of antimicrobial and immune defense proteins by mammary epithelial cells following Streptococcus uberis infection of sheep. Infect Immun. 2013;81: 3182–3197. (2) Addis MF, Tedde V, Dore S, Pisanu S, Puggioni GMG, Roggio AM, et al. Evaluation of milk cathelicidin for detection of dairy sheep mastitis. J Dairy Sci. Elsevier; 2016;99: 6446–6456. In conclusion, our results provide the first in depth characterization of buffalo milk proteins, describe the changes induced by SAU and NAS subclinical intramammary infection and suggest indications to reveal subclinical staphylococcal mastitis in buffalo by the milk proteome investigation.
2019-10-22 | PXD012355 | Pride
Project description:Metataxonomic and Immunological Analysis of Milk from Ewes with or without a History of Mastitis
| PRJNA517581 | ENA