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Small-RNA sequencing of sEV isolated from plasma of astronauts

ABSTRACT: small-RNA sequencing of sEV isolated from plasma of astronauts

PROVIDER: PRJNA795799 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR17518000.fastq.gz	Fastqsanger.gz
	SRR17518100.fastq.gz	Fastqsanger.gz
	SRR17518001.fastq.gz	Fastqsanger.gz
	SRR17518101.fastq.gz	Fastqsanger.gz
	SRR17518002.fastq.gz	Fastqsanger.gz

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small-RNA sequencing of sEV isolated from plasma of astronauts

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Project description:This study aimed to determine whether the spaceflight-induced snoRNA changes in plasma extracellular vesicles (EV) and astronauts' peripheral blood mononuclear cells (PBMCs) can be utilized as potential biomarkers. Using unbiased small RNA sequencing, we evaluated the EV snoRNA changes in peripheral blood (PB) plasma of astronauts (n=5/group) who underwent median 12-day long Shuttle missions between 1998-2001. Using stringent cutoff (> log 2-fold change, FDR < 0.05), we detected 21 down-regulated snoRNAs and 9 upregulated in PB-EVs at three days after return (R+3) compared to ten days before launch (L-10). Our findings unveiled that spaceflight induced changes in EV and PBMCs snoRNA expression, thus suggesting snoRNAs may serve as novel biomarkers for monitoring astronauts' health.

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Project description:There are unique stressors in the spaceflight environment. Exposure to such stressors is associated with adverse effects on astronauts' health, including increased cancer and cardiovascular disease risks. Small extracellular vesicles (sEVs, i.e., exosomes) play a vital role in intercellular communication and regulate various biological processes contributing to their role in disease pathogenesis. To assess whether spaceflight alters sEVs transcriptome profile, sEVs were isolated from the blood plasma of 3 astronauts at two different time points: 10 days before launch (L-10) and 3 days after return (R+3) from the Shuttle mission. Human adult ventricular cardiomyocyte cells (AC16) were treated with L-10 and R+3 astronauts-derived exosomes for 24 hours. Total RNA was isolated and analyzed for gene expression profiling using Affymetrix microarrays. Enrichment analysis was performed using Enrichr. Transcription factor enrichment analysis using the ENCODE/ChEA Consensus TF database identified gene sets related to the polycomb repressive complex 2 (PRC2) and Vitamin D receptor (VDR) in AC16 cells treated with R+3 compared to cells treated with L-10 astronauts-derived exosomes. Further analysis of the histone modifications using datasets from the Roadmap Epigenomics Project confirmed enrichment in gene sets related to the H3K27me3 repressive mark. Interestingly, analysis of previously published H3K27me3–chromatin immunoprecipitation sequencing (ChIP-Seq) ENCODE datasets showed enrichment of H3K27me3 in the VDR promoter. Collectively, our results suggest that astronaut-derived sEVs may epigenetically repress the expression of the VDR in human adult cardiomyocytes c by promoting the activation of the PRC2 complex and H3K27me3 levels.

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