High Intake of Selenium, -Carotene, and Vitamins A, C, and E Reduces Growth of Helicobacter pylori in the Guinea Pig
Abstract:Purpose: Helicobacter pylori is a human gastroduodenal pathogen associated with type-B gastritis and gastric cancer. Low gastric tissue antioxidant levels are believed to increase the risk of developing gastric cancer. We investigated whether dietary antioxidant levels protect against infection and type-B gastritis in H. pylori-infected guinea pigs.
Methods: Dunkin-Hartley guinea pigs infected for 6 weeks with H. pylori were fed diets with various antioxidant levels. Stomach specimens were cultured, and gastritis was graded from 0 to 3.
Results: Supplementation with vitamins A, C, and E and with selenium yielded H. pylori recovery from 17% of challenged animals, compared with 43% of those fed a control diet. Gastritis was scored at 0.33 and 0.93, respectively. Supplementation with only vitamin C or astaxanthin had less effect on gastritis and recovery rate. In a second experiment, gastritis score in a group given vitamins A, C, E, and selenium and -carotene was 2.25 and in a control group, it was 2.57. The H. pylori recovery rate was 75 and 100%, respectively, with fewer colonies from animals given antioxidant supplementation (P < 0.05).
Conclusions: A combination of antioxidants can protect against H. pylori infection in guinea pigs. In animal studies, antioxidant intake should be low to optimize development of H. pylori-associated disease. Furthermore we established that H. pylori causes severe gastritis in guinea pigs.
Document Type: Research Article
Affiliations: 1: Department of Medical Microbiology, Dermatology and Infection, Lund University, Solveg 23, SE-223 62 Lund, Sweden 2: Department of Pathology, Sahlgrens Hospital, University of Gothenburg, Sweden
Publication date: October 1, 2001
Comparative Medicine (CM), an international journal of comparative and experimental medicine, is the leading English-language publication in the field and is ranked by the Science Citation Index in the upper third of all scientific journals. The mission of CM is to disseminate high-quality, peer-reviewed information that expands biomedical knowledge and promotes human and animal health through the study of laboratory animal disease, animal models of disease, and basic biologic mechanisms related to disease in people and animals.
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