Daily intake of extracellular vesicles (EVs) derived from fish (f-EVs) may contribute to health maintenance by reducing cardiovascular risk. However, their physicochemical and biological properties remain unclear. In this study, we compared the physical characteristics (size, zeta potential, and free fatty acid composition) and biological characteristics (cell proliferation) of f-EVs with those of EVs derived from mammals (m-EVs). In the physical characteristic analysis, f-EVs derived from Pagrus major (PMS-EVs) and Seriola quinqueradiata (SQS-EVs) had a negatively charged and a positively charged group and higher levels of unsaturated fatty acids, unlike m-EVs. In the biological characteristic analysis for f-EVs, SQS-EV enhanced the human umbilical vein endothelial cell proliferation via vascular endothelial growth factor receptor 2, fibroblast growth factor receptor 1, or platelet-derived growth factor β. These data suggest that SQS-EVs have unique functions compared with other EVs. To the best of our knowledge, this is the first study to show that SQS-EVs act positively on human cells.
Keywords: angiogenic signaling; extracellular vesicle; fish serum.