Ontology highlight
ABSTRACT:
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| ERR204529.fastq.gz | Fastqsanger.gz | |||
| ERR204530.fastq.gz | Fastqsanger.gz | |||
| ERR204531.fastq.gz | Fastqsanger.gz | |||
| ERR204532.fastq.gz | Fastqsanger.gz | |||
| ERR204533.fastq.gz | Fastqsanger.gz |
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Project description:Cruciferous vegetables and their derived compounds, such as glucosinolates, have demonstrated anti-inflammatory properties in animal models. In this study, broccoli-supplemented diet induced changes in the gut microbiome and its role in host and bacterial gene expression were examined in mice following consumption of the Total Western Diet (TWD), which is based on NHANES data and represents the composition of a typical American diet. C57BL/6 male mice were fed a TWD for six weeks followed by a supplementation of 0, 0.5, 1 or 2.5% broccoli powder for three weeks. Microbial communities from cecal contents were taxonomically profiled using 16S and metagenomics sequencing, and metatranscriptomics was used to assess functionality of bacterial species. Cecum tissues were also analyzed for host transcriptomics.
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Project description:Cruciferous vegetables and their derived compounds, such as glucosinolates, have demonstrated anti-inflammatory properties in animal models. In this study, broccoli-supplemented diet induced changes in the gut microbiome and its role in host and bacterial gene expression were examined in mice following consumption of the Total Western Diet (TWD), which is based on NHANES data and represents the composition of a typical American diet. C57BL/6 male mice were fed a TWD for six weeks followed by a supplementation of 0, 0.5, 1 or 2.5% broccoli powder for three weeks. Microbial communities from cecal contents were taxonomically profiled using 16S and metagenomics sequencing, and metatranscriptomics was used to assess functionality of bacterial species. Cecum tissues were also analyzed for host transcriptomics.
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Project description:Minimal processing using chlorinated water washes is a common practice in the fresh produce industry to reduce the microbial load and bacterial pathogens attached on produce surfaces. To evaluate if E. coli O157:H7 strains with different phyllogenetic backgrounds are equally sensitive or display variable resistance to chlorine treatment, we studied the expression profile of Sakai and one 2006 spinach outbreak strain (TW 14359) in response to chlorine and hydrogen peroxide treatment.
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Project description:Background: While the luminal microbiome composition in the human cervicovaginal tract has been defined, the presence and impact of tissue-adherent ectocervical microbiota remain incompletely understood. Studies of luminal and tissue-associated bacteria in the gastrointestinal tract suggest that they may have distinct roles in health and disease. Here, we performed a multi-omics characterization of paired luminal and tissue samples collected from a clinically well-characterized cohort of Kenyan women. Results: We identified a tissue-adherent bacterial microbiome, with a higher alpha diversity than the luminal microbiome, in which dominant genera overall included Gardnerella and Lactobacillus, followed by Prevotella, Atopobium, and Sneathia. About half of the L. iners dominated luminal samples had a corresponding Gardnerella dominated tissue microbiome. Broadly, the tissue-adherent microbiome was associated with fewer differentially expressed host genes than the luminal microbiome. Gene set enrichment analysis revealed that L. crispatus-dominated tissue-adherent communities were associated with protein translation and antimicrobial activity, whereas a highly diverse microbiome was associated with epithelial remodeling and pro-inflammatory pathways. Communities dominated by L. iners and Gardnerella were associated with low host transcriptional activity. Tissue-adherent microbiomes dominated by Lactobacillus and Gardnerella correlated with host protein profiles associated with epithelial barrier stability, and with a more pro-inflammatory profile for the Gardnerella-dominated microbiome group. Tissue samples with a highly diverse composition had a protein profile representing cell proliferation and pro-inflammatory activity. Conclusion: We identified ectocervical tissue-adherent bacterial communities in all study participants. These communities were distinct from cervicovaginal luminal microbiota in a significant proportion of individuals. This difference could possibly explain that L. iners dominant luminal communities have a high probability of transitioning to high diverse bacterial communities including high abundance of Gardnerella. By performing integrative multi-omics analyses we further revealed that bacterial communities at both sites correlated with distinct host gene expression and protein levels. The tissue-adherent bacterial community is similar to vaginal biofilms that significantly impact women’s reproductive and sexual health.
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