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Inhibition of Proliferation and Epithelial Mesenchymal Transition in Retinal Pigment Epithelial Cells by Heavy Chain-Hyaluronan/Pentraxin 3 #MMPMID28252047
He H; Kuriyan AE; Su CW; Mahabole M; Zhang Y; Zhu YT; Flynn HW; Parel JM; Tseng SCG
Sci Rep 2017[]; 7 (ä): ä PMID28252047show ga
Proliferative vitreoretinopathy (PVR) is mediated by proliferation and epithelial mesenchymal transition (EMT) of retinal pigment epithelium (RPE). Because heavy chain-hyaluronic acid/pentraxin 3 (HC-HA/PTX3) purified from human amniotic membrane exerts anti-inflammatory and anti-scarring actions, we hypothesized that HC-HA/PTX3 could inhibit these PVR-related processes in vitro. In this study, we first optimized an ARPE-19 cell culture model to mimic PVR by defining cell density, growth factors, and cultivation time. Using this low cell density culture model and HA as a control, we tested effects of HC-HA/PTX3 on the cell viability (cytotoxicity), proliferation (EGF?+?FGF-2) and EMT (TGF-?1). Furthermore, we determined effects of HC-HA/PTX3 on cell migration (EGF?+?FGF-2?+?TGF-?1) and collagen gel contraction (TGF-?1). We found both HA and HC-HA/PTX3 were not toxic to unstimulated RPE cells. Only HC-HA/PTX3 dose-dependently inhibited proliferation and EMT of stimulated RPE cells by down-regulating Wnt (?-catenin, LEF1) and TGF-? (Smad2/3, collagen type I, ?-SMA) signaling, respectively. Additionally, HA and HC-HA/PTX3 inhibited migration but only HC-HA/PTX3 inhibited collagen gel contraction. These results suggest HC-HA/PTX3 is a non-toxic, potent inhibitor of proliferation and EMT of RPE in vitro, and HC-HA/PTX3?s ability to inhibit PVR formation warrants evaluation in an animal model.