PURPOSE: To evaluate the role of low molecular chitosan containing sepia ink (LMCS) in ethanol-induced (5 ml/kg) gastric ulcer in rats. METHODS: Animals were divided into four groups (n = 12): normal group (Normal), negative control group (Con), experiment group (LMCS) and positive control Omeprazole group (OMZ). Gastric empty rate was detected in the first 7 days. Rats were sacrificed at 7, 14 and 21 day for histology and ELISA detections. RESULTS: Gastric empty was no significant differences among the groups (P > 0.05). Histological observation showed gastric mucosal LMCS treated had better healing effect. Hydroxyproline (Hyp) was significantly increased from 7 day (P < 0.05). LMCS significantly inhibited malondialdehyde (MDA) generation for lipid peroxidation from 7 day (P < 0.05). LMCS significantly promoted the activity of superoxide dismutase (SOD), catalase (CAT) and glutathione peroxidase (GPx) at the earlier stage (P < 0.05). OMZ had the similar effects above. As for myeloperoxidase (MPO), LMCS significantly decreased and restored it to normal levels from 7 day (P < 0.05), it is earlier than OMZ which is from 14 day. CONCLUSION: LMCS can improve gastric mucosa tissue repair, exert significant influences on oxidative and antioxidant enzyme activities and neutrophil infiltration.
[1]Lingnan Normal Univ, Postgrad Program Biomed Materimals, Round Beibu Gulf Inst Protect & Utilizat Marine A, Zhanjiang, Peoples R China.
[2]Guangdong Ocean Univ, Coll Fisheries, Key Lab Nutr & Feed, Zhanjiang, Peoples R China.
[3]Lingnan Normal Univ, Life Sci & Technol Sch, Zhanjiang, Peoples R China.
[4]Fudan Univ, Shanghai Med Coll, Dept Pathol & Pathol Physiol, Shanghai, Peoples R China.
[5]Lingnan Normal Univ, Postgrad Program Med Anim, RBGPUM, Zhanjiang, Peoples R China.
(8.0+极速模式)