期刊
JOURNAL OF NUTRITIONAL BIOCHEMISTRY
卷 51, 期 -, 页码 40-46出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.jnutbio.2017.08.017
关键词
AMPK; DSS; Colitis; Inflammation; Red raspberry; Tight junctions
资金
- National Processed Raspberry Council
Persistent intestinal inflammation severely impairs intestinal integrity resulting in inflammatory bowel disease. Red raspberries (RB) are a rich source of bioactive compounds; their beneficial effect on the colitis protection was evaluated in the current study using a dextran sulfate sodium (DSS)-induced acute colitis mouse model. Six-week-old mice were fed a standard rodent research diet supplemented with RB (0 or 5% w/w, n=20 each group) for 6 weeks. At the 4th week of dietary treatment, approximately half of mice in each dietary group (n=12 each group) were subjected to 2.5% DSS induction for 6 days, followed by 6 days of recovery, to induce colitis. RB supplementation decreased body weight loss (P <=.01), disease activity index (p <=.01), and colon shortening (p <=.05) in DSS-treated mice. In addition, RB supplementation protected the colonic structure (p <=.01), associated with suppressed NF-kappa B signaling and reduced expression of inflammatory interleukin (IL)-1 beta, IL-6, IL-17, cyclooxegenase-2, and tumor necrosis factor-a in DSS-treated mice. RB supplementation reduced neutrophil infiltration, monocyte chemoattractant protein-1 mRNA expression, and xanthine oxidase content, but enhanced catalase content in DSS-treated mice. Consistently, RB supplementation reduced pore forming tight junction protein claudin-2, increased barrier strengthening claudin-3, zonula occluden-1 protein content and mucin (MUC)-2 mRNA level, and activated AMP-activated protein kinase (AMPK) in DSS-treated mice. In conclusion, dietary RB protected against inflammation and colitis symptoms induced by DSS, providing a promising dietary approach for the management of colitis. (C) 2017 Elsevier Inc. All rights reserved.
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