Extracellular vesicles mediate intercellular communication: Transfer of functionally active microRNAs by microvesicles into phagocytes.

Autor: Claßen L; Department of Internal Medicine V, Division of Rheumatology, University Hospital Heidelberg, Heidelberg, Germany., Tykocinski LO; Department of Internal Medicine V, Division of Rheumatology, University Hospital Heidelberg, Heidelberg, Germany., Wiedmann F; Department of Internal Medicine III, Department of Cardiology, University Hospital Heidelberg, Heidelberg, Germany., Birr C; Department of Internal Medicine V, Division of Rheumatology, University Hospital Heidelberg, Heidelberg, Germany., Schiller P; Department of Internal Medicine V, Division of Rheumatology, University Hospital Heidelberg, Heidelberg, Germany., Tucher C; Department of Internal Medicine V, Division of Rheumatology, University Hospital Heidelberg, Heidelberg, Germany., Krienke S; Department of Internal Medicine V, Division of Rheumatology, University Hospital Heidelberg, Heidelberg, Germany., Raab MS; Department of Internal Medicine V, Department of Haematology & Oncology, University Hospital Heidelberg, Heidelberg, Germany., Blank N; Department of Internal Medicine V, Division of Rheumatology, University Hospital Heidelberg, Heidelberg, Germany., Lorenz HM; Department of Internal Medicine V, Division of Rheumatology, University Hospital Heidelberg, Heidelberg, Germany.; ACURA Center for Rheumatic Diseases, Baden Baden, Germany., Schiller M; Department of Internal Medicine V, Division of Rheumatology, University Hospital Heidelberg, Heidelberg, Germany.
Jazyk: angličtina
Zdroj: European journal of immunology [Eur J Immunol] 2017 Sep; Vol. 47 (9), pp. 1535-1549. Date of Electronic Publication: 2017 Jul 20.
DOI: 10.1002/eji.201646595
Abstrakt: Cell activation and apoptosis lead to the formation of extracellular vesicles (EVs) such as exosomes or microvesicles (MVs). EVs have been shown to modulate immune responses; recently, MVs were described to carry microRNA (miRNA) and a role for MVs in the pathogenesis of autoimmune diseases has been discussed. Here we systematically characterized MVs and exosomes according to their release stimuli. The miRNA content of viable or apoptotic human T lymphocytes and the corresponding MVs was analyzed. miRNA, protein and surface marker expression, as well as cytokine release by human monocytes was measured after EV engulfment. Finally, miRNA expression in T lymphocytes and MVs of healthy individuals was compared with those of systemic lupus erythematosus (SLE) patients. We demonstrate that, depending on the stimuli, distinct subtypes of EVs are released, differing in size and carrying a specific RNA profile. We observed an accumulation of distinct miRNAs in MVs after induction of apoptosis and the transfer of functional miRNA by MVs into human monocytes. MVs released from apoptotic cells provoke less of an inflammatory response than those released from viable cells. MiR-155*, miR-34b and miR-34a levels in T lymphocytes and corresponding MVs were deregulated in SLE when compared to healthy individuals.
(© 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.)
Databáze: MEDLINE
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