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http://dx.doi.org/10.4062/biomolther.2012.20.4.425

A Comparison between Water and Ethanol Extracts of Rumex acetosa for Protective Effects on Gastric Ulcers in Mice  

Bae, Ji-Yeong (College of Pharmacy and Research Institute of Pharmaceutical Sciences, Gyeongsang National University)
Lee, Yoon-Seok (College of Pharmacy and Research Institute of Pharmaceutical Sciences, Gyeongsang National University)
Han, Sun-Young (College of Pharmacy and Research Institute of Pharmaceutical Sciences, Gyeongsang National University)
Jeong, Eun-Ju (Department of Agronomy & Medicinal Plant Resources, Gyeongnam National University of Science and Technology)
Lee, Mi-Kyeong (College of Pharmacy, Chungbuk National University)
Kong, Jae-Yang (College of Pharmacy and Research Institute of Pharmaceutical Sciences, Gyeongsang National University)
Lee, Dong-Hoon (Department of Anatomy, School of Medicine, and Institute of Health Sciences, Gyeongsang National University)
Cho, Kyeong-Jae (Department of Anatomy, School of Medicine, and Institute of Health Sciences, Gyeongsang National University)
Lee, Haeng-Soon (Environmental Biotechnology Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB))
Ahn, Mi-Jeong (College of Pharmacy and Research Institute of Pharmaceutical Sciences, Gyeongsang National University)
Publication Information
Biomolecules & Therapeutics / v.20, no.4, 2012 , pp. 425-430 More about this Journal
Abstract
Rumex acetosa is a perennial herb that is widely distributed across eastern Asia. Although the hot water extract of R. acetosa has been used to treat gastritis or gastric ulcers as a folk medicine, no scientific report exists for the use of this plant to treat gastric ulcers. Hence, the present study was undertaken to assess the anti-ulcer activity of water and 70% ethanol extracts obtained from R. acetosa, using an HCl/ethanol-induced gastric ulcer model in mice. Anti-inflammatory and free radical-scavenging activities of these two extracts were also evaluated and compared. As a result, the administration of R. acetosa extracts significantly reduced the occurrence of gastric ulcers. However, significant differences in protective activity against gastric ulcers were observed between the two samples. In the case of the group pretreated with an ethanol extract dosage of 100 mg/kg, the protective effect (90.9%) was higher than that of water extract (41.2%). Under histological evaluation, pretreatment with R. acetosa extracts reversed negative effects, such as inflammation, edema, moderate hemorrhaging and loss of epithelial cells, presented by HCl/ethanol-treated stomachs. Meanwhile, R. acetosa extracts showed potent DPPH radical-scavenging activity and decreased NO production in a murine macrophage cell line, RAW 264.7, in a dose-dependent manner without affecting cellular viability. The greater anti-ulcer and NO production inhibitory activities exhibited by ethanol extracts compared to water extracts could be ascribed to the higher emodin levels, a major anthraquinone component of this plant.
Keywords
Rumex acetosa; Gastric ulcer; Antioxidant activity; Anti-inflammatory activity;
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