Korean J Vet Res > Volume 51(3); 2011 > Article
Korean Journal of Veterinary Research 2011;51(3):177-183.
DOI: https://doi.org/10.14405/kjvr.2011.51.3.177    Published online September 1, 2011.
Protective effect of the methanol extract of Polyopes lancifolia (Harvey) kawaguchi et wang against ionizing radiation-induced mouse gastrointestinal injury
Jinwoo Jeong1, Wonjun Yang1, Meejung Ahn2, Ki Cheon Kim2, Jin Won Hyun2, Sung-Ho Kim3, Changjong Moon3, Taekyun Shin1
1Department of Veterinary Anatomy, College of Veterinary Medicine and Veterinary Medical Research Institute, Jeju National University
2Applied Radiological Science Research Institute, Jeju National University
3Department of Veterinary Anatomy, College of Veterinary Medicine, Chonnam National University
Abstract
The radioprotective efficacy of a methanol extract of the red algae Polyopes lancifolia (Harvey) kawaguchi et wang (mPL) was evaluated in mice subjected to total-body gamma irradiation. mPL protection against radiation-induced oxidative stress was examined by histological evaluation of intestinal crypt-cell survival and liver activities of the antioxidant enzymes superoxide dismutase (SOD) and catalase (CAT). mPL (100 mg/kg body weight) administered intraperitoneally at 24 h and 1 h prior to irradiation protected jejunal crypt cells from radiation-induced apoptosis (p < 0.01). The pretreatment of mPL attenuated a radiation-induced decrease in villous height (p < 0.05), and improved jejunal crypt survival (p < 0.05). The dose reduction factor was 1.14 at 3.5 days after irradiation. Treatment with mPL prior to irradiation resulted in significantly higher (p < 0.01) levels of SOD and CAT activities, compared to those levels of irradiated control mice with vehicle treatment. These results suggest that mPL is a useful radioprotective agent capable of defending intestinal progenitor cells against total-body irradiation, at least in part through mPL antioxidative activity.
Key Words: antioxidation, intestinal progenitor cells, irradiation, Polyopes lancifolia (Harvey) kawaguchi et wang, red seaweed


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