Exosomes are small extracellular vesicules of 30-100 nm constitutively released under certain stimuli in biological fluids including blood, urine, saliva, breast milk, culture medium of cell cultures, etc.
Exosomes contain various molecular constituents of their cell of origin, including proteins and microRNA. Circulant exosomes can potentially act as cargo messenger and transfer molecules from one cell to another via membrane vesicle trafficking. . Exosomes are suitable for a variety of downstream applications including microRNA analysis, protein analysis and functional use.