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Antibacterial and Intracellular Clearance Effect of Saururus chinensis Baill Water Extract against Salmonella typhimurium  

Kim, Dong-Hyeok (College of Veterinary Medicine (Insti. of Agric. and Life Sci.), Gyeongsang National Univ.)
Lee, Jin-Ju (College of Veterinary Medicine (Insti. of Agric. and Life Sci.), Gyeongsang National Univ.)
Lim, Jeong-Ju (College of Veterinary Medicine (Insti. of Agric. and Life Sci.), Gyeongsang National Univ.)
Kim, Dae-Geun (College of Veterinary Medicine (Insti. of Agric. and Life Sci.), Gyeongsang National Univ.)
Kim, Gon-sub (College of Veterinary Medicine (Insti. of Agric. and Life Sci.), Gyeongsang National Univ.)
Lee, Hu-Jang (College of Veterinary Medicine (Insti. of Agric. and Life Sci.), Gyeongsang National Univ.)
Min, Won-gi (College of Veterinary Medicine (Insti. of Agric. and Life Sci.), Gyeongsang National Univ.)
Rhee, Man-Hee (College of Veterinary Medicine, Gyeongpuk National Univ.)
Chang, Hong-Hee (Div. of Applied Life Science (insti. of Agric. and Life Sci.), Gyeongsang National Univ.)
Kim, Suk (College of Veterinary Medicine (Insti. of Agric. and Life Sci.), Gyeongsang National Univ.)
Publication Information
Journal of agriculture & life science / v.44, no.6, 2010 , pp. 111-119 More about this Journal
Abstract
Salmonella spp. are one of major pathogens for zoonosis in worldwide, and can replicate within host cells and generally cause enterocolitis and foodborne poisoning which represents a considerable public health burden. The present study was designated to investigate the safty for host cells, antibacterial effects of Saururus chinensis Baill water extract (SCWE) on pure culture and infection with Salmonella enterica serovar Typhimurium (S. typhimurium) in murine derived macrophage RAW 264.7 cells. The different treatment of SCWE concentration (1, 10 or $100{\mu}g/ml$) did not show any cytotoxic effect to RAW 264.7 cells for 24 h incubation. In determination of antibacterial activity of SCWE against S. typhimurium, bacterial viability was markedly decreased compared to SCWE-untreated control. In RAW 264.7 cells, SCWE significantly induced morphological change (p<0.05). In infection assay of S. typhimurium in RAW 264.7 cells pretreated with $100{\mu}g/ml$ of SCWE, which are non-cytotoxic concentration, bacterial uptake ability of macrophage was increased corresponding with morphological change, whereas bacterial survival rates within macrophage was markedly reduced comparing to that of SCWE-untreated control. Furthermore, nitric oxide (NO) production in SCWE-treated cells was slightly decreased until 24 h post infection. Taken together, these findings demonstrated that SCWE have the antibacterial activity for S. typhimurium and the protective effects against S. typhimurium infection through activating murine macrophage independent on NO, suggesting that SCWE were beneficial on the disease caused by intracellularly replicating pathogens as a safe alternatives of conventional chemotherapies.
Keywords
Saururus chinensis Baill; Salmonella; Water extract; Antibacterial effect; Macrophage;
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