Exosomes mediate protective messages during oxidative stress; role of exosomal shuttle RNA

Exosomes are small extracellular nano-vesicles of endocytic origin that mediate different signals between cells, by surface interactions and by shuttling of functional RNA from one cell to another. In this study, we show that exosomes, produced by mouse mast cells exposed to oxidative stress, change their mRNA content and also that these exosomes can influence the response of other cells to oxidative stress by providing recipient cells with a resistance against oxidative stress. Finally, we also show that UV-light affect the biological functions associated with exosomes released under oxidative stress. These results argue that exosomal shuttle of RNA is involved in cell-to-cell communication, by influencing the response of recipient cells to an external stimulus.

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Eldh M, Ekström K, Valadi H, Sjöstrand M, Olsson B, Jernås M, Lötvall J