Influence of vitamin E on gastric mucosal injury induced by Helicobacter pylori infection.
We investigated the effect of vitamin E on gastric mucosal injury induced by Helicobacter pylori (H. pylori) infection. Male Mongolian gerbils were divided into 4 groups (normal group without H. pylori infection, vitamin E-deficient, -sufficient and -supplemented groups with H. pylori infection). Following oral inoculation with H. pylori (ATCC43504 2 x 10(8) CFU), animals were fed diets alpha-tocopherol 2 mg/100 g diet in the normal and vitamin E-sufficient groups and alpha-tocopherol 0.1 mg/100 g and 50 mg/100 g in the vitamin E-deficient and -supplemented groups, respectively, for 24 weeks. Chronic gastritis was detected in all gerbils inoculated H. pylori. Gastric ulcer was detected in 2 of 7 gerbils only in the vitamin E-deficient group. In the vitamin E-deficient group, myeloperoxidase activity and mouse keratinocyte derived chemokine (KC) in gastric mucosa was significantly higher than in the vitamin E supplemented group. Subsequently, in an in vitro study expression of CD11b/CD18 on neutrophils was enhanced by H. pylori water extract. This effect was suppressed in a dose dependent manner by the addition of alpha-tocopherol. These results suggest that vitamin E has a protective effect on gastric mucosal injury induced by H. pylori infection in gerbils, through the inhibition of accumulation of activated neutrophils.
Sugimoto
Naohito
N
Inflammation and Immunology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan.
Yoshida
Norimasa
N
Nakamura
Yasunari
Y
Ichikawa
Hiroshi
H
Naito
Yuji
Y
Okanoue
Takeshi
T
Yoshikawa
Toshikazu
T
D000818:Animals; D019587:Dietary Supplements; D004195:Disease Models, Animal; D005753:Gastric Mucosa / Q000187:drug effects* / Q000276:immunology / Q000378:metabolism; D005849:Gerbillinae; D016481:Helicobacter Infections / Q000150:complications* / Q000188:drug therapy / Q000473:pathology; D016480:Helicobacter pylori / Q000187:drug effects / Q000472:pathogenicity*; D008297:Male; D051379:Mice; D013276:Stomach Ulcer / Q000188:drug therapy / Q000382:microbiology* / Q000473:pathology; D014810:Vitamin E / Q000008:administration & dosage / Q000494:pharmacology*
D014810:Vitamin E