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Human vaginal metagenome

ABSTRACT: Vaginal microbiome of South African women

PROVIDER: PRJNA767784 | ENA |

REPOSITORIES: ENA

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			Action	DRS
		Other
	SRR16503423_1.fastq.gz	Fastqsanger.gz
	SRR16503423_2.fastq.gz	Fastqsanger.gz
	SRR16503424_1.fastq.gz	Fastqsanger.gz
	SRR16503424_2.fastq.gz	Fastqsanger.gz

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Project description:Clinical treatment protocols for infertility with in vitro fertilization-embryo transfer (IVF-ET) provide a unique opportunity to assess the human vaginal microbiome in defined hormonal milieu. Herein, we have investigated the association of circulating ovarian-derived estradiol (E2) and progesterone (P4) concentrations to the vaginal microbiome. Thirty IVF-ET patients were enrolled in this study, after informed consent. Blood was drawn at four time points during the IVF-ET procedure. In addition, if a pregnancy resulted, blood was drawn at 4-to-6 weeks of gestation. The serum concentrations of E2 and P4 were measured. Vaginal swabs were obtained in different hormonal milieu. Two independent genome-based technologies (and the second assayed in two different ways) were employed to identify the vaginal microbes. The vaginal microbiome underwent a transition with a decrease in E2 (and/or a decrease in P4). Novel bacteria were found in the vagina of 33% of the women undergoing IVF-ET. Our approach has enabled the discovery of novel, previously unidentified bacterial species in the human vagina in different hormonal milieu. While the relationship of hormone concentration and vaginal microbes was found to be complex, the data support a shift in the microbiome of the human vagina during IVF-ET therapy using standard protocols. The data also set the foundation for further studies examining correlations between IVF-ET outcome and the vaginal microbiome within a larger study population.

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Project description:Pre-exposure chemoprophylaxis using antiretroviral agents is a promising strategy for the prevention of sexual HIV transmission in women. Molecular transporters in the human vaginal tract may play a pivotal role in determining drug disposition and, consequently, pharmacodynamic outcomes in these efforts. Little is known, however, on the expression of these transporters in vaginal tissues, representing a critical knowledge gap. Our study analyzed the genome-wide transcriptome in 44 vaginal tissue samples from 6 reproductive-age women undergoing gynecologic surgeries. The genome-wide transcriptome in 44 vaginal tissue samples from 6 reproductive-age women (20-56 years old) undergoing gynecologic surgeries was measured.

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Vaginal epithelial dysfunction is mediated by the microbiome, metabolome, and mTOR signaling - Participant Group 1

Project description:Bacterial vaginosis (BV) is characterized by depletion of Lactobacillus and overgrowth of anaerobic and facultative bacteria, leading to increased mucosal inflammation, epithelial disruption, and poor reproductive health outcomes. However, the molecular mediators contributing to vaginal epithelial dysfunction are poorly understood. Here we utilized proteomic, transcriptomic and metabolomic analyses to characterize biological features underlying BV in 405 African women and explored functional mechanisms using bacterial co-culturesin vitro. We identified five major vaginal microbiome groups, (L.crispatus(21%), L.iners(18%), any non-specific Lactobacillus species(9%), Gardnerella species .vaginalis(30%), or polymicrobial(22%)). Using multi-‘omics we show that BV associated epithelial disruption and mucosal inflammation are linked to the mammalian target of rapamycin (mTOR) pathway and associate with Gardnerella.vaginalis, M.mulieris, and specific metabolites including imidazole propionate. Bacterial co-culturesExperiments in vitro confirmed that type strain G.vaginalis and, M.mulieris supernatants and, as well as, and imidazole propionate, directly affect epithelial barrier function and , accompanied by activation of mTOR pathways. These results establish the microbiome-mTOR axis as a central feature of epithelial dysfunction in BV.

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