Abstract
Human blood contains a great variety of membrane-covered RNA carrying vesicles which are spherical or tubular particles enclosed by a phospholipid bilayer. Circulating vesicles are thought to mediate cell-to-cell communication and their RNA cargo can act as regulatory molecules. In this work, we separated blood plasma of healthy donors by centrifugation and determined that vesicles precipitated at 16,000 g were enriched with CD41a, marker of platelets. At 160,000 g, the pellets were enriched with CD3 marker of T cells. To characterize the RNA-content of the blood plasma sub fractions, we performed high throughput sequencing of the RNA pelleted within vesicles at 16,000 g and 160,000 g as well as RNA remaining in the vesicle-free supernatant. We found that blood plasma sub fractions contain not only extensive set of microRNAs but also fragments of other cellular RNAs: rRNAs, tRNAs, mRNAs, lncRNAs, small RNAs including RNAs encoded by mtDNAs. Our data indicate that a variety of blood plasma RNAs circulating within vesicles as well as of extra-vesicular RNAs are comparable to the variety of cellular RNA species.
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Acknowledgements
We wish to thank Professor Ryabchikova E.I. D.Biol.Sci. for microscopy investigations. We also thank Kurilshchikov A.M. for the support in bioinformatics. The work was supported by the RFBR grants 16-04-01457 A and the Interdisciplinary Integration Project of SB RAS № 84 (2012–2015).
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The authors declare no conflict of interest.
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© 2016 Springer International Publishing Switzerland
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Savelyeva, A.V., Baryakin, D.N., Chikova, E.D., Kuligina, E.V., Richter, V.A., Semenov, D.V. (2016). Vesicular and Extra-Vesicular RNAs of Human Blood Plasma. In: Gahan, P., Fleischhacker, M., Schmidt, B. (eds) Circulating Nucleic Acids in Serum and Plasma – CNAPS IX. Advances in Experimental Medicine and Biology, vol 924. Springer, Cham. https://doi.org/10.1007/978-3-319-42044-8_23
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DOI: https://doi.org/10.1007/978-3-319-42044-8_23
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