title: Antioxidative effects in vivo and colonization of Lactobacillus plantarum MA2 in the murine intestinal tract.
abstract: Lactobacillus plantarum MA2 was isolated from traditional Chinese Tibet kefir grains, which possess several excellent properties and functions. We previously demonstrated the antioxidant activities of this bacterium in vitro. However, the maintenance and survival of L. plantarum MA2 inside the murine intestinal tract, where it exerts its probiotic properties, and whether its effects are elicited directly on the host remain unknown. Therefore, this study investigated the mechanisms of L. plantarum MA2 in aging mice following D-galactose administration. The levels of malondialdehyde decreased significantly in the L. plantarum MA2 groups after oral ingestion compared to the D-galactose model group, and total antioxidant capacity and glutathione peroxidase and superoxide dismutase activities increased significantly in the serum and liver. We combined fluorescein isothiocyanate labeling and green fluorescent protein expression to dynamically monitor the colonization and distribution of L. plantarum MA2 in the murine intestinal tract. The results indicated that L. plantarum MA2 was detected in the ileum, colon, and feces after single and continuous oral administration at day 21 and was maintained at 10(4)-10(5) CFU/g. These results suggest that L. plantarum MA2 colonizes and survives in the murine intestinal tract to exert its antioxidative effects.
authors.affiliation: Key Laboratory of Food Nutrition and Safety, Ministry of Education, Food Engineering and Biotechnology Institute, Tianjin University of Science and Technology, Tianjin, 300457, China.
authors.forename: Wei
authors.initials: W
authors.lastname: Tang
authors.affiliation: Key Laboratory of Food Nutrition and Safety, Ministry of Education, Food Engineering and Biotechnology Institute, Tianjin University of Science and Technology, Tianjin, 300457, China.
authors.forename: Zhuqing
authors.initials: Z
authors.lastname: Xing
authors.affiliation: Key Laboratory of Food Nutrition and Safety, Ministry of Education, Food Engineering and Biotechnology Institute, Tianjin University of Science and Technology, Tianjin, 300457, China.
authors.forename: Wei
authors.initials: W
authors.lastname: Hu
authors.affiliation: Key Laboratory of Food Nutrition and Safety, Ministry of Education, Food Engineering and Biotechnology Institute, Tianjin University of Science and Technology, Tianjin, 300457, China.
authors.forename: Chao
authors.initials: C
authors.lastname: Li
authors.affiliation: Key Laboratory of Food Nutrition and Safety, Ministry of Education, Food Engineering and Biotechnology Institute, Tianjin University of Science and Technology, Tianjin, 300457, China.
authors.forename: Jinju
authors.initials: J
authors.lastname: Wang
authors.affiliation: Key Laboratory of Food Nutrition and Safety, Ministry of Education, Food Engineering and Biotechnology Institute, Tianjin University of Science and Technology, Tianjin, 300457, China. ypwang40@163.com.
authors.forename: Yanping
authors.initials: Y
authors.lastname: Wang
mesh_terms: D000818:Animals; D000975:Antioxidants / Q000378:metabolism; D003106:Colon / Q000382:microbiology*; D005243:Feces / Q000382:microbiology*; D005690:Galactose / Q000378:metabolism; D005979:Glutathione Peroxidase / Q000378:metabolism; D007082:Ileum / Q000382:microbiology*; D007422:Intestines / Q000382:microbiology*; D000070716:Kefir / Q000382:microbiology; D048191:Lactiplantibacillus plantarum / Q000254:growth & development* / Q000378:metabolism; D008099:Liver / Q000378:metabolism; D008297:Male; D008315:Malondialdehyde / Q000097:blood / Q000378:metabolism; D051379:Mice; D019936:Probiotics / Q000378:metabolism*; D013482:Superoxide Dismutase / Q000378:metabolism
chemical_list: D000975:Antioxidants; D008315:Malondialdehyde; D005979:Glutathione Peroxidase; D013482:Superoxide Dismutase; D005690:Galactose
keywords: Antioxidative effects; Colonization; Fluorescence imaging; In vivo; L. plantarum MA2