Abstract
With growing applications of plastic products, there is a growing threat to human health. Therefore, it is important to understand their toxicological behaviors. The release of neutrophil extracellular traps (NETs) was clarified as a new immune defense mechanism against intruders. Here, we discovered that polystyrene nanoplastics (PS NPs) induce NET formation, with involvement of reactive oxygen species, peptidyl arginine deiminase 4 (PAD4), and neutrophil elastase. Moreover, overexpression of PAD4 induced by PS NPs further mediates histone citrullination and chromatin depolymerization. These results provide important information and promising strategies for safety and immunotoxicity assessment of NPs.
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