Ontology highlight
ABSTRACT:
PROVIDER: PRJNA788693 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| SRR17242102_1.fastq.gz | Fastqsanger.gz | |||
| SRR17242102_2.fastq.gz | Fastqsanger.gz | |||
| SRR17242103_1.fastq.gz | Fastqsanger.gz | |||
| SRR17242103_2.fastq.gz | Fastqsanger.gz | |||
| SRR17242104_1.fastq.gz | Fastqsanger.gz |
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Project description:Background: Physiological inflammation of the uterus postpartum is essential for the reparative processes of involution after calving. In the majority of cows, this inflammation is resolved and homeostasis is restored. However, in a significant subset, inflammation persists and contributes to tissue damage, pathology and subfertility. Transcriptomic differences of immune genes between cattle that resolve inflammation and those that develop uterine disease have been detected as early as 7 days postpartum (DPP) suggesting that the host immune response plays an important role in disease outcome. Results: Here, we extensively characterise the immune response at the transcriptomic level in endometrial epithelial cells from post-partum dairy cows phenotyped for both clinical and sub-clinical forms of uterine disease. We address the hypothesis that excessive expression of endometrial inflammatory molecules contributes to development of endometritis. Classification of cattle (n=112) as healthy or with uterine disease (purulent vaginal discharge; PVD and cytological endometritis; CYTO) was based on vaginal mucus score and >18% polymorphonuclear cell infiltrate into the endometrium at 21 DPP. RNA-seq analysis of endometrial epithelial cells collected using cytobrushes identified differential expression of 294 genes (FDR <0.05) between cows that subsequently resolved inflammation (n=10) and those that developed disease (n=20). Pathway over-representation analysis of differentially expressed genes (DEG) identified significant changes in immune-related pathways, including the NOD-like receptor signalling pathway, cytokine-cytokine receptor interaction pathway and the Toll-like receptor signalling pathway which were up-regulated in cattle that subsequently developed disease. The majority of the DEG were upregulated in cows that developed PVD, and included all genes upregulated in CYTO cows, suggesting a core inflammatory gene signature early post-partum contributes to the onset of uterine disease. This inflammatory signature was validated by qPCR in an independent group of cows (n=56) and included upregulation of pro-inflammatory genes (including TLR2, TLR4, NLRP3, IL1A, IL1B, IL8, and S100A8) at day 7 postpartum in cows that failed to resolve inflammation. Conclusions: Despite a large amount of inter-animal heterogeneity, these results suggest that excessive activation and inappropriate regulation of the inflammatory response early postpartum is a key feature of the subsequent development of uterine disease. Keywords: Endometritis, Inflammation, Transcriptome, Next generation sequencing, Dairy cattle, Uterine involution, Immune response
2019-04-01 | GSE125964 | GEO
Project description:Endometrial microbiota of donkeys with endometritis Raw sequence reads
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Project description:Vaginal and Uterine Microbiota of Healthy Maiden Mares During Estrus
| PRJNA1121906 | ENA
Project description:Clinical or subclinical endometritis could affect the cow fertility by disturbing the molecular milieu of the uterine environment. We used a global gene expression approach to understand the effect of clinical and subclinical endometritis on endometrial transcriptome profiles of cows
2016-11-13 | GSE74987 | GEO
Project description:Gene expression in the neonatal uterus and vagina from transformation related protein 63 (Trp63) conditional heterozygous and null mice was analyzed in order to identify upstream and downstream of Trp63 in the developing vagina. Differential gene expression between vaginal (Trp63 positive) and uterine (Trp63 negative) tissues should reflect both the upstream and downstream of Trp63 expression, whereas the comparison between conditional knockout and heterozygous vaginae should identify what is downstream of Trp63. Thus, the three-way comparison should identify what is upstream of Trp63.
2013-03-14 | GSE44697 | GEO
Project description:Most dairy cows suffer uterine microbial contamination postpartum. Persistent endometritis often develops, associated with reduced fertility. We used a model of differential feeding and milking regimes to produce cows in differing negative energy balance (NEB) status in early lactation. We used Affymetrix GeneChipM-CM-^R Bovine Genome Array to investigate the global gene expression underlying negative energy balance and to identify the significantly differentially expressed genes during this process. We investigate the differences of gene expression profiles in uterine endometrial tissues between the cows with mild and severe negative energy balance.
2009-04-04 | E-GEOD-15544 | biostudies-arrayexpress
Project description:The hormonal contraceptive medroxyprogesterone acetate (MPA) is associated with increased risk of human immunodeficiency virus (HIV), via incompletely understood mechanisms. Increased diversity in the vaginal microbiota modulates genital inflammation and is associated with increased HIV-1 acquisition. However, the effect of MPA on diversity of the vaginal microbiota is relatively unknown. In a cohort of female Kenyan sex workers, negative for sexually transmitted infections (STIs), with Nugent scores <7 (N=58 of 370 screened), MPA correlated with significantly increased diversity of the vaginal microbiota as assessed by 16S rRNA gene sequencing. MPA was also significantly associated with decreased levels of estrogen in the plasma, and low vaginal glycogen and α-amylase, factors implicated in vaginal colonization by lactobacilli, bacteria that are believed to protect against STIs. In a humanized mouse model, MPA treatment was associated with low serum estrogen, low glycogen and enhanced HIV-1 susceptibility. The mechanism by which the MPA mediated changes in the vaginal microbiota may contribute to HIV-1 susceptibility in humans appears to be independent of inflammatory cytokines and/or activated T cells. Altogether, these results suggest MPA-induced hypo-estrogenism may alter key metabolic components that are necessary for vaginal colonization by certain bacterial species including lactobacilli, and allow for greater bacterial diversity in the vaginal microbiota.
2019-10-17 | GSE138971 | GEO
Project description:Vaginal microbiota, cervix microbiota, uterine microbiota Raw sequence reads
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Project description:The regulation of endometrial inflammation has important consequences for the resumption of bovine fertility post-partum. All cows experience bacterial influx into the uterus after calving; however a significant proportion fail to clear infection leading to the development of cytological endometritis (CE) and compromised fertility. We hypothesised that early immunological changes could not only act as potential prognostic biomarkers for the subsequent development of disease but also shed light on the pathogenesis of endometritis in the post-partum dairy cow. Here, next-generation sequencing from endometrial biopsies taken at 7 days post-partum (DPP) identified significant expression of inflammatory genes in all cows. Despite the common inflammatory profile and enrichment of the Toll-like receptor, NFκB and TNF signalling pathways, 73 genes and 31 miRNAs differentiated between healthy cows (HC, n=9) and cows which subsequently developed CE at 7 DPP (n=6, FDR<0.1). In healthy cows, 4197 differentially expressed genes between 7 and 21 DPP whereas only 31 genes were differentially expressed in samples from cows with CE. At 21 DPP, a further 1167 genes were differentially expressed between HC cows and cows diagnosed with CE (FDR<0.1). These changes in host gene expression reflected culture-independent microbiological analysis which showed significant differences in uterine bacterial profiles between groups. Inflammatory activity was not confined to the uterus; decreased circulating granulocytes and increased Acute Phase Protein (SAA and HP) plasma expression levels were detected at 7 DPP in cows that developed CE. In conclusion, our data suggests that the major inflammatory cascade activated early post-partum is resolved thereby restoring homeostasis in healthy cows by 21 DPP, but this transition fails to occur in cows which develop CE. Despite a common inflammatory profile, differential expression of specific immune genes may identify cows at risk of prolonged inflammation and the development of CE post-partum.
2015-08-01 | GSE66826 | GEO