Add time:08/12/2019         Source:sciencedirect.com

Phosphoprotein enriched in astrocytes 15 (PEA15) plays a multi-functional role in neuronal cell survival, however the effects of PEA15 against inflammation have not been investigated yet. To examine the effects of PEP-1-PEA15 protein against lipopolysaccharide (LPS)-induced inflammatory responses in Raw 264.7 cells and in a 12-O-tetradecanoylphobol 13-acetate (TPA)-induced mouse model, we constructed and purified PEP-1-PEA15 protein, which can transduce into cells or tissues. PEP-1-PEA15 inhibited LPS-induced damage in cells including that caused by reactive oxygen species (ROS) production and DNA fragmentation. PEP-1-PEA15 also significantly suppressed activation of mitogen activated protein kinases (MAPKs), pro-inflammatory mediator proteins and various cytokines. In a TPA-induced mouse ear edema model, PEP-1-PEA15 significantly reduced ear weight and thickness as well as MAPK activation as well as the expression levels of COX-2, iNOS, IL-6, IL-1β, and TNF-α. These results demonstrated that PEP-1-PEA15 showed anti-inflammatory effect in cells and animal model suggesting that this fusion protein protects cells or skin tissues from inflammatory response.

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