Screening for intestinal microflora influencing superoxide dismutase activity in mouse cecal mucosa.
We have suggested that intestinal microflora reduces the activity of the antioxidant enzyme superoxide dismutase (SOD) in the mouse cecal mucosa. In this study, gnotobiotic mice were used to examine the species of intestinal microflora influencing SOD activity in the cecal mucosa. The total SOD activity in the cecal mucosa of each germ-free (GF), gnotobiotic mouse with Escherichia coli, Lactobacillus and Bacteroides was significantly higher than that in the cecal mucosa of gnotobiotic mice with chloroform-treated feces (CHF), conventionalized (CVz) mice and conventional (CV) mice (P<0.05). In addition, CuZnSOD mRNA expression showed similar tendencies. Our results suggest that the antioxidant defense status in the cecal mucosa is influenced by CHF inoculation.
Laboratory of Experimental Animal Science, Nippon Veterinary and Life Science University, 1-7-1 Kyonan-cho, Musashino, Tokyo 180-8602, Japan.
Yuu
Y
Dobashi
Kikuji
K
Itoh
Atsushi
A
Tohei
Hiromi
H
Amao
D000818:Animals; D002432:Cecum / Q000201:enzymology*; D002452:Cell Count; D007413:Intestinal Mucosa / Q000201:enzymology*; D007422:Intestines / Q000382:microbiology*; D051379:Mice; D064307:Microbiota / Q000502:physiology*; D013482:Superoxide Dismutase / Q000378:metabolism*
D013482:Superoxide Dismutase