Saliva methylome analysis of ART children that underwent embryo culture in G3 or K-SICM medium
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PROVIDER: PRJNA804887 | ENA |
REPOSITORIES: ENA
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Project description:Follow-up study of 9 year old IVF children who underwent embryo culture in G3 (Vitrolife) or K-SICM (Cook) medium. Genome-wide DNA methylation profiling of 9 year old IVF children (saliva samples) who had undergone embryo culture in G3 medium (Vitrolife) or K-SICM medium (Lonza). The EPIC array was used to profile the methylome at approximately 850,000 CpG sites across the human genome.
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Project description:We profiled the DNA methylation of saliva cell types, to develop a tool for epidemiologic studies. Saliva was collected from 22 children, 21 participants with samples usable for DNA methylation, and sorted into immune and epithelial cells, using size exclusion filtration and magnetic bead sorting. DNA methylation was measured using the Illumina MethylationEPIC BeadChip. Saliva immune and epithelial cells have distinct DNA methylation profiles, which can influence whole saliva epidemiologic measures.
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Project description:Introduction: HIV infection causes pathologic changes in the natural killer (NK) cell compartment that can be only partially restored by antiretroviral therapy (ART). We investigated NK cells phenotype and function in children with perinatally acquired HIV (PHIV) and long term viral control (5years) due to effective ART in a multicentre cross-sectional study (CARMA, EPIICAL consortium). The impact of age at ART start and viral reservoir was also evaluated. Methods: Peripheral Blood Mononuclear Cells (PBMCs) from 40 PHIV that started ART within two years of life (early treated patients, ET ≤ 6 months; late treated patients, LT > 6 months), with at least five years of HIV-1 suppression (< 40 HIV copies/ml), were collected between November 2017 and August 2018. NK phenotype and function were analysed by flow cytometry and transcriptional profile of PBMCs by RNA-Seq. HIV-1 DNA was measured by real-time PCR. Data were analysed by Spearman correlation plots and multivariable Poisson regression model (adjusted for baseline %CD4 and RNA HIV viral load and for age at ART start as interaction term, either ET or LT) to explore the association between NK cell parameters and HIV reservoir modulated by age at ART start. Results: A significantly higher frequency of CD56neg NK cells was found in LT compared with ET. We further found in LT a positive correlation of CD56neg NK with HIV-1 DNA. LT also displayed increased expression of the NKG2D and NKp46 activating receptors and perforin compared with ET. Moreover, CD107a+ and IFN-γ+ frequencies in non-stimulated NK were associated with HIV-1 DNA in LT patients. Finally, RNA-Seq analysis showed in LT an upregulation of genes related to NK activating pathways and susceptibility to apoptosis compared with ET. Conclusions: We show that ET present a preserved NK compartment compared with LT, which is associated with lower HIV-1 reservoir and persist despite long-term viral control due to effective ART.
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Project description:A paired analysis of peripheral blood mononuclear cells (PBMCs) isolated before and after antiretroviral therapy (ART) from a robust number of HIV-infected patients (N=36). Results identify a total of 4,157 DEGs following ART in HIV-infected participants and the transition from a period of active virus replication before ART to one of viral suppression This study evaluated PBMC gene expression in cells from 36 (4 dropped from analysis) recently HIV-infected individuals to identify differentially expressed genes following 48 weeks of ART
2013-09-10 | E-GEOD-44228 | biostudies-arrayexpress
Project description:Saliva is a convenient non-invasive source of liquid biopsy to monitor human health and diagnose diseases. In particular, extracellular vesicles (EVs) in saliva can potentially reveal clinically relevant information for systemic health. Recent studies have shown that RNA in saliva EVs could be exploited as biomarkers for disease diagnosis. However, there is no standardized protocol for profiling RNA in saliva EV nor clear guideline on selecting saliva fractions for biomarker analysis. To address these issues, we established a robust protocol for small RNA profiling from fractionated saliva. With this method, we performed comprehensive small RNA sequencing of four saliva fractions, including cell-free saliva (CFS), EV-depleted saliva (EV-D), exosome (EXO), and microvesicle (MV) from ten healthy volunteers. Methods: To address these issues, we established a robust protocol for small RNA profiling from fractionated saliva. With this method, we performed comprehensive small RNA sequencing of four saliva fractions, including cell-free saliva (CFS), EV-depleted saliva (EV-D), exosome (EXO), and microvesicle (MV) from ten healthy volunteers.
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