Anti-inflammatory effect of external use of escin on cutaneous inflammation: possible involvement of glucocorticoids receptor  

作　　者：ZHAO Shu-Qi XU Shi-Qiang CHENG Jing CAO Xiao-Lu ZHANG Ying ZHOU Wei-Ping HUANG Yan-Juan WANG Jun HU Xia-Min 

机构地区：[1]Department of Pharmacy, Medical College of Wuhan University of Science and Technology [2]Department of Nutrition and Food Hygiene, School of Public Health, Medical College of Wuhan University of Science and Technology [3]College of Pharmacy, Shanghai University of Medicine & Health Sciences

出　　处：《Chinese Journal of Natural Medicines》2018年第2期105-112,共8页中国天然药物（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.81602108)

摘　　要：Escin, as an internally applied anti-inflammatory agent, has been widely used in the treatment of inflammation and edema resulting from trauma or operation in the clinic. However, the effect of its external use on cutaneous inflammation and edema remains unexplored. In the present study, the anti-inflammatory and anti-edematous effects of external use of escin were studied in carrageenan-induced paw edema and histamine-induced capillary permeability in rats, paraxylene-induced ear swelling in mice, and cotton pellet-induced granuloma in rats. Effects of external use of escin gel on prostaglandin E2(PGE2), tumor necrosis factor-α(TNF-α), and interleukin-1β(IL-1β) were determined by ELISA. The anti-inflammatory mechanism was explored by detecting the expression of glucocorticoid receptor(GR) with Western blotting and Real-time PCR analyses, with further exploration of nuclear factor-κB(NF-κB), p38 mitogen-activated protein kinase(P38 MAPK) and activator protein-1(AP-1) expressions. We demonstrated that external use of escin showed significant anti-inflammatory effects on acute and chronic inflammation in different animal models and its anti-inflammatory effects might be related to down-regulation of PGE2, TNF-α, and IL-1β. The results also showed that escin exerted its anti-inflammatory effects by promoting the expression of GR, with the possible mechanism being inhibition of the expressions of GR-related signaling molecules such as NF-κB and AP-1.Escin, as an internally applied anti-inflammatory agent, has been widely used in the treatment of inflammation and edema resulting from trauma or operation in the clinic. However, the effect of its external use on cutaneous inflammation and edema remains unexplored. In the present study, the anti-inflammatory and anti-edematous effects of external use of escin were studied in carrageenan-induced paw edema and histamine-induced capillary permeability in rats, paraxylene-induced ear swelling in mice, and cotton pellet-induced granuloma in rats. Effects of external use of escin gel on prostaglandin E2（PGE2）, tumor necrosis factor-α（TNF-α）, and interleukin-1β（IL-1β） were determined by ELISA. The anti-inflammatory mechanism was explored by detecting the expression of glucocorticoid receptor（GR） with Western blotting and Real-time PCR analyses, with further exploration of nuclear factor-κB（NF-κB）, p38 mitogen-activated protein kinase（P38 MAPK） and activator protein-1（AP-1） expressions. We demonstrated that external use of escin showed significant anti-inflammatory effects on acute and chronic inflammation in different animal models and its anti-inflammatory effects might be related to down-regulation of PGE2, TNF-α, and IL-1β. The results also showed that escin exerted its anti-inflammatory effects by promoting the expression of GR, with the possible mechanism being inhibition of the expressions of GR-related signaling molecules such as NF-κB and AP-1.

关 键 词：ESCIN Cutaneous inflammation GLUCOCORTICOID Nuclear factor-κB Activator protein-1 

分 类 号：R285.5[医药卫生—中药学]