Figure 2.

Morphology of untreated EAhy 926 endothelial cells (a) and cells exposed to the positive control 20 nm plain polystyrene particles (b) after 24 h of culture. Cultures of the untreated EAhy 926 endothelial cells have formed a confluent monolayer with occasional dividing cells (indicated by circles). Cells exposed to the positive control do not form a monolayer but have rounded up, detached from the growth substrate, and float in the medium. Scale bar: 50 µm.