Investigating the impact of various 2d and 3d cell culture platforms on the production of extracellular vesicles

Scientists are paying close attention to extracellular vesicles (EVs), tiny particles that cells release to communicate with one another. These vesicles carry signals such as proteins, RNA, and other molecules, and they hold promise for diagnosing disease and even developing new therapies. But because patient samples are limited, researchers often grow cells in the lab to generate EVs in a controlled way.

A team led by researchers from the University of Guelph set out to compare different cell culture methods to see how they affect EV production. Standard flat (2D) cultures are easy to use but don’t fully mimic how cells behave in the body. In contrast, 3D culture systems create an environment that’s more similar to real tissues, which could change the way EVs are made and released.

The researchers compared traditional 2D cultures with three 3D platforms: ultralow attachment (ULA) plates, collagen-coated plates, and AlgiMatrix plates made from alginate sponges. They studied how cells grew and how many EVs they released, as well as the size and uniformity of those vesicles.

The results showed that ULA and collagen-coated platforms produced more EVs than 2D cultures, and those EVs were smaller and more consistent in size. The AlgiMatrix platform, however, caused problems because the sponge-like material interfered with measuring EV size.

These findings show that the type of material and culture environment matters greatly when producing EVs. Choosing the right system could improve research in diagnostics and therapies based on EVs, helping to make these tiny biological messengers even more useful in medicine.