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14 June 2018 Ferulic Acid Mitigates Radiation Injury in Human Umbilical Vein Endothelial Cells In Vitro via the Thrombomodulin Pathway
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Cell death and tissue injury occur as a result of radiation accidents and radiotherapy. The role of endothelial cell damage in mediating radiation-induced acute tissue injury has been extensively studied. We previously demonstrated that ferulic acid (FA) mitigates radiation-induced hematopoietic injury in mice and lessens radiation-induced oxidative damage in human umbilical vein endothelial cells (HUVECs). The purpose of the current study was to determine whether FA can protect HUVECs from radiation toxicity in a cell model via the thrombomodulin (Thbd) pathway, an anti-radiation pathway with anticoagulant, anti-inflammatory and antioxidant properties. HUVEC culture media was supplemented with FA 12 h before 4 Gy 60Co gamma irradiation. At 30 min postirradiation, the FA media was refreshed, then renewed once daily. HUVEC injury was assessed at day 5 postirradiation through cell proliferation analysis. Ferulic acid significantly ameliorated HUVEC radiation injury, as evidenced by increases in cell viability and angiogenesis and decreases in G2/M cell cycle arrest and levels of high mobility group box 1 protein (HMGB1), interleukin (IL)-6 and IL-8. These findings can be attributed to the effect of FA on the Thbd promoter, resulting in increased expression of Thbd and activated protein C with associated radioprotection. These observations indicate that FA intervention significantly ameliorates HUVEC radiation injury via the Thbd pathway. Therefore, FA could be further developed as a potential agent to mitigate radiation-induced damage.

©2018 by Radiation Research Society.
Shuai Shao, Yue Gao, Jianxiang Liu, Mei Tian, Qiao Gou, and Xu Su "Ferulic Acid Mitigates Radiation Injury in Human Umbilical Vein Endothelial Cells In Vitro via the Thrombomodulin Pathway," Radiation Research 190(3), 298-308, (14 June 2018).
Received: 28 November 2016; Accepted: 21 May 2018; Published: 14 June 2018

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