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Comparative transcriptomic profiling of breast-milk isolated total somatic cells from women with mastitis following the consumption of a probiotic containing a Lactobacillus salivarius PS2 strain

ABSTRACT: We used Affymetrix microarrays to investigate gene expression changes in somatic cells from breast-milk extracted from women suffering from mastitis and taking a daily dose of three capsules with ~50 mg of a freeze-dried probiotic (~109 CFU of L. salivarius PS2 strain) for 21 days. Healthy women were subjected to the same treatment for comparison.

ORGANISM(S): Homo sapiens

PROVIDER: GSE65152 | GEO | 2015/01/21

SECONDARY ACCESSION(S): PRJNA273285

REPOSITORIES: GEO

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Comparative transcriptomic profiling of breast-milk isolated total somatic cells from women with mastitis following the consumption of a probiotic containing a Lactobacillus salivarius PS2 strain

Project description:We used Affymetrix microarrays to investigate gene expression changes in somatic cells from breast-milk extracted from women suffering from mastitis and taking a daily dose of three capsules with ~50 mg of a freeze-dried probiotic (~109 CFU of L. salivarius PS2 strain) for 21 days. Healthy women were subjected to the same treatment for comparison. The aim of this work was to determine whether the daily intake of a probiotic strain for a total of 21 days exerted any modulatory effects, at the level of gene expression, in somatic cells from breast-milk in women with mastitis. Women were divided into 2 groups: mastitis and healthy. Total RNA was extracted from breast-milk isolated cells obtained from 10 participants (7 women from the mastitis group and 3 women from the healthy group) at day 0 (initial) and after 21 days (final) to compare differential gene expression between the groups. Differential gene expression after 21 days of the study for each group: mastitis and healthy

2015-01-21 | E-GEOD-65152 | biostudies-arrayexpress

Extracellular vesicles of probiotic microorganism Streptococcus salivarius

Project description:Identification of proteins from extracellular vesicles isolated from Streptococcus salivarius. This work was financially supported by the National Science Centre, Poland (grant number 2021/43/D/NZ6/01464).

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RNA sequencing of Streptococcus salivarius strains from oral cavities of Korean subjects

Project description:To investigate the subspecies level differences in the expression profiles of Streptococcus salivarius strains, we conducted the RNA sequencing analysis of Streptococcus salivarius strains.

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Project description:Lactobacillus salivarius, found in the intestinal microbiota of humans and animals, is studied as an example of sub-dominant intestinal commensals that may impart benefits upon their host. Strains typically harbor at least one megaplasmid which encodes functions contributing to contingency metabolism and environmental adaptation. RNA-seq transcriptomic analysis of L. salivarius strain UCC118 identified the presence of a novel long and unusually abundant non-coding RNA (lancRNA) encoded by the megaplasmid and which represented more than 75% of total RNA-seq reads after depletion of ribosomal RNA species. The expression level of this 550 nt lancRNA in L. salivarius UCC118 exceeded that of the 16S rRNA, it accumulated during growth, was very stable over time, and was also expressed during intestinal transit in a mouse. This lancRNA sequence is specific to the L. salivarius species, however among 45 L. salivarius genomes analyzed, not all (only 34) harbored the sequence for the lancRNA. This lancRNA was produced in 27 tested L. salivarius strains but at strain-specific expression levels. High-level lancRNA expression correlated with high megaplasmid copy number. Transcriptome analysis of a deletion mutant lacking this lancRNA identified altered expression levels of genes in a number of pathways but a definitive function of this new long non-coding RNA was not identified. This lancRNA presents distinctive and unique properties, and suggests potential basic and applied scientific developments of this phenomenon.

2017-08-01 | GSE92837 | GEO

Transcription profiling of Lactobacillus salivarius bile response_LS201

Project description:Porcine bile induced transcriptome of Lactobacillus salivarius

2009-07-16 | E-MEXP-2224 | biostudies-arrayexpress

Transcription profiling of Lactobacillus salivarius KS201 cholate response

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Transcription profiling of Lactobacillus salivarius bile response_LS201bsh knockout

Project description:bile induced transcriptome of Lactobacillus salivarius LS201bsh ko.

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Transcription profiling of L. salivarius LS201bsh cholate response

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Molecular bases of virulence variability in Staphylococcus aureus mastitis isolates

Project description:Background: S. aureus is one of the main pathogen involved in ruminant mastitis worldwide. The severity of staphylococcal infection is highly variable and ranges from subclinical to gangrenous mastitis. Such variability implies host as well as staphylococcal factors. This work is an in-depth characterization of S. aureus mastitis isolates to identify factors involved in mastitis severity. Methods and findings: We combined three “omic” approaches to comprehensively compare two clonally related S. aureus strains that were isolated from and shown to reproducibly induce severe (strain O11) and milder (strain O46) mastitis in ewes. The genomes of O11 and O46 were sequenced (Illumina technology) to determine their respective gene content and comparative transcriptomic and proteomic analyses were carried out on both strains grown in conditions mimicking mastitis context. High differences were highlighted in mobile genetic elements, iron acquisition and metabolism, transcriptional regulation and exoprotein production. In particular, O11 overproduced exoproteins, including toxins and proteases when compared to O46. This was confirmed in 4 other S. aureus strains isolated from subclinical or clinical mastitis cases. Dose-dependant production of some staphylococcal factors seem to play a role in hypervirulence of strains isolated from severe mastitis. Mobile genetic elements, transcriptional regulators, exoproteins or strain ability to deal with iron starvation constitute good targets for further research to better define the underlying mechanisms of mastitis severity. Conclusions: Differences observed in mastitis severity likely result from the ability of the strains to adapt and to express virulence factors in the mastitis context rather than from deep variations in gene content.

2011-11-11 | GSE25084 | GEO

Survival and Diversity of Human Homologous Dietary MicroRNAs in Conventionally Cooked Top Sirloin and Dried Bovine Tissue Extracts

Project description:We report the human homologous microRNA profiles in food-grade, bovine-sourced sirloin, heart and adrenal tissue (raw, cooked, and laboratory-prepared pasteurized, freeze-dried extracts) Deep miRNA sequencing of sirloin (raw and cooked), heart tissue (raw, cooked, and pastuerized, freeze-dried extracts) and adrenal tissue (raw, cooked, and laboratory-prepared pasteurized, freeze-dried extracts), 3 replicates each process group

2015-09-02 | E-GEOD-69874 | biostudies-arrayexpress

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