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Int J Food Microbiol. 2005 Aug 25;103(2):143-55.

Probiotic effects of Lactobacillus casei on DSS-induced ulcerative colitis in mice.

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Department of Public Health and Food Safety, Faculty of Veterinary Medicine, Utrecht University, Yalelaan 2, 3584 CM Utrecht, The Netherlands.


We tested the effect of Lactobacillus casei strain Shirota (LcS) on the murine model of ulcerative colitis induced by dextran sodium sulphate. The effect of LcS was tested either as a prophylactic 10 days before the onset of the disease, simultaneously with ulcerative colitis induction or continued 10 days after the disease was induced. LcS was not able to prevent the disease induction in any of the experiments. However, important clinical parameters including blood anemia indicators, body weight, and organ weight were improved in the animals receiving LcS as compared with the ulcerative colitis-induced controls. Increased colonic epithelial regeneration in the LcS treated animals was observed in the chronic stage. The results seemed better for the simultaneous short LcS treatment where some parameters remained similar to the PBS controls, including disease activity scores measured in the acute stage. We can conclude that although LcS alone cannot prevent the induction of ulcerative colitis by dextran sodium sulphate, it can improve the clinical condition of the mice. This could imply important biological consequences for the human situation. Further studies including LcS or other probiotic bacteria together with the available treatment are encouraged.

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