Exosomes EXPLAINED

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Exosomes are teeny tiny sacks in each of our cells. They’re about one onehundredth the size of a typical human cell. They’re microscopic parcels secreted from cells and filled with cellular waste—RNA, proteins, and remnants of metabolic processes. The exosome’s membrane is so similar to the cell’s own membrane, that it’s able to slip inside another cell when it comes into contact.

Microbiologists first discovered exosomes in the 1980s. Initially, scientists thought they were a kind of cellular trash bag—providing a way to get rid of molecular waste a cell no longer needed. However, in the past decade, it’s become increasingly clear that exosomes, and what they carry, are not trash, but rather they play a role in cellular communication. Intercellular signaling is achieved when a cell delivers their exosome contents to recipient cells.

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