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Abstract Title:

Probiotic Bifidobacterium bifidum G9-1 attenuates 5-fluorouracil-induced intestinal mucositis in mice via suppression of dysbiosis-related secondary inflammatory responses.

Abstract Source:

Clin Exp Pharmacol Physiol. 2017 Jun 7. Epub 2017 Jun 7. PMID: 28590519

Abstract Author(s):

Shinichi Kato, Nahla Hamouda, Yoshitaro Kano, Yousuke Oikawa, Yoshiki Tanaka, Kenjiro Matsumoto, Kikuko Amagase, Masaki Shimakawa

Article Affiliation:

Shinichi Kato

Abstract:

Bifidobacterium, a major component of the intestinal microbiota, has been clinically used for the treatment of diarrhoea and constipation. 5-Fluorouracil (5-FU), widely used for cancer chemotherapy, is known to frequently induce intestinal mucositis accompanied by severe diarrhoea. The present study examined the effect of Bifidobacterium bifidum G9-1 (BBG9-1) on 5-FU-induced intestinal mucositis in mice. Intestinal mucositis was induced by repeated administration of 5-FU for 6 days. BBG9-1 was administered orally once daily for 9 days, beginning 3 days before the onset of 5-FU treatment. Repeated administration of 5-FU caused severe intestinal mucositis, characterised by shortening of villi and destruction of crypts, accompanied by increases in intestinal myeloperoxidase activity and inflammatory cytokine expression, body weight loss, and diarrhoea on day 6. Daily administration of BBG9-1 significantly reduced the severity of intestinal mucositis and inflammatory responses and tended to attenuate clinical symptoms. In contrast, BBG9-1 failed to prevent apoptosis induction on day 1 after the first 5-FU administration. The structure of the intestinal microbiota, as analysed by weighted UniFrac distance, was largely altered by 5-FU treatment, but this change was mitigated by daily administration of BBG9-1. Moreover, 5-FU treatment decreased the abundance of Firmicutes and increased the abundance of Bacteroidetes, but these responses were also significantly inhibited by daily administration of BBG9-1. These results suggest that BBG9-1 has an ameliorative effect against 5-FU-induced intestinal mucositis through the attenuation of inflammatory responses via improve dysbiosis. BBG9-1 could be useful for the prevention of intestinal mucositis during cancer chemotherapy. This article is protected by copyright. All rights reserved.

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