Protective effect of Holothurian intestine against indomethacin induced gastric mucosal damage in rats

Our study aimed to investigate the protective effects of Holothurian intestines (HI) on NSAIDs-induced gastric mucosal damage and the possible mechanism. At first, 60 male Wistar rats were induced of gastric lesions with indomethacin (IDM, 30 mg kg(-1)). The rats were pretreated for 15 consecutive days with saline, sucralfate, or HI (0.4 g kg(-1)d(-1), 0.8 g kg(-1)d(-1) and 1.6 g kg(-1)d(-1)) prior to IDM treatment, followed by evaluations of macroscopic damage and microscopic features; and investigation of the levels of inflammatory cytokines, oxidative stress parameters, gastric mucosal prostaglandin E2 (PGE2) and total hexosamine in tissues. The expression of COX-1 and COX-2 mRNA in the gastric tissue were determined by quantitative polymerase chain reaction (qPCR). Pathological gastric ulcer indexes, levels of pro-inflammatory cytokines (IL-1 beta, IL-17, TNF-alpha) and lipid peroxidation were significantly decreased in HI-treated groups, whereas the levels of protective factors (TGF-beta, GSH, SOD activity and PGE2) were significantly elevated especially in the group with HI 1.6 g kg(-1)d(-1) (P < 0.05). Furthermore, the expression of COX-2 mRNA decreased significantly in HI groups (P < 0.05). The study investigates that holothurian intestines may act as a kind of marine medicine which have protective effect on IDM-induced gastric ulcer, which could be a dietary preventive agent for the prevention of gastric damage.