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BioMed Research International
Volume 2017, Article ID 7404912, 10 pages
https://doi.org/10.1155/2017/7404912
Research Article

Variety of RNAs in Peripheral Blood Cells, Plasma, and Plasma Fractions

1Institute of Chemical Biology and Fundamental Medicine, Siberian Branch, Russian Academy of Sciences, Lavrentiev Avenue 8, Novosibirsk 630090, Russia
2Novosibirsk Regional Clinical Oncology Dispensary, Plahotnogo Street 2, Novosibirsk 630108, Russia

Correspondence should be addressed to Anna V. Savelyeva; moc.liamg@vaavelevas

Received 2 September 2016; Revised 25 November 2016; Accepted 28 November 2016; Published 3 January 2017

Academic Editor: Brian Oliver

Copyright © 2017 Anna V. Savelyeva et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Human peripheral blood contains RNA in cells and in extracellular membrane vesicles, microvesicles and exosomes, as well as in cell-free ribonucleoproteins. Circulating mRNAs and noncoding RNAs, being internalized, possess the ability to modulate vital processes in recipient cells. In this study, with SOLiD sequencing technology, we performed identification, classification, and quantification of RNAs from blood fractions: cells, plasma, plasma vesicles pelleted at 16,000 and 160,000, and vesicle-depleted plasma supernatant of healthy donors and non-small cell lung cancer (NSCLC) patients. It was determined that 16,000 blood plasma vesicles were enriched with cell-free mitochondria and with a set of mitochondrial RNAs. The variable RNA set of blood plasma 160,000 pellets reflected the prominent contribution of U1, U5, and U6 small nuclear RNAs’ fragments and at the same time was characterized by a remarkable depletion of small nucleolar RNAs. Besides microRNAs, the variety of fragments of mRNAs and snoRNAs dominated in the set of circulating RNAs differentially expressed in blood fractions of NSCLC patients. Taken together, our data emphasize that not only extracellular microRNAs but also circulating fragments of messenger and small nuclear/nucleolar RNAs represent prominent classes of circulating regulatory ncRNAs as well as promising circulating biomarkers for the development of disease diagnostic approaches.