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Mediators of Inflammation
Volume 2017, Article ID 5801768, 11 pages
Research Article

Different Dietary Proportions of Fish Oil Regulate Inflammatory Factors but Do Not Change Intestinal Tight Junction ZO-1 Expression in Ethanol-Fed Rats

1School of Nutrition and Health Sciences, Taipei Medical University, Taipei 110, Taiwan
2Research Center of Geriatric Nutrition, College of Nutrition, Taipei Medical University, Taipei 110, Taiwan
3Department of Nutrition and Health Sciences, Chang Gung University of Science and Technology, Taoyuan 333, Taiwan
4Department of Anatomy, Taipei Medical University, Taipei 110, Taiwan
5National Applied Research Laboratories, National Laboratory Animal Center, Taipei 115, Taiwan

Correspondence should be addressed to Suh-Ching Yang; wt.ude.umt@iekos

Received 17 July 2017; Revised 30 September 2017; Accepted 15 October 2017; Published 13 December 2017

Academic Editor: Helieh S. Oz

Copyright © 2017 Yi-Wen Chien et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Sixty male Wistar rats were fed a control or an ethanol-containing diet in groups C or E. The fat compositions were adjusted with 25% or 57% fish oil substituted for olive oil in groups CF25, CF57, EF25, and EF57. Hepatic thiobarbituric acid-reactive substance (TBARS) levels, cytochrome P450 2E1 protein expression, and tumor necrosis factor- (TNF-) α, interleukin- (IL-) 1β, IL-6, and IL-10 levels, as well as intracellular adhesion molecule (ICAM)-1 levels were significantly elevated, whereas plasma adiponectin level was significantly reduced in group E (). Hepatic histopathological scores of fatty change and inflammation, in group E were significantly higher than those of group C (). Hepatic TBARS, plasma ICAM-1, and hepatic TNF-α, IL-1β, and IL-10 levels were significantly lower, and plasma adiponectin levels were significantly higher in groups EF25 and EF57 than those in group E (). The immunoreactive area of the intestinal tight junction protein, ZO-1, showed no change between groups C and E. Only group CF57 displayed a significantly higher ZO-1 immunoreactive area compared to group C (). 25% or 57% fish oil substituted for dietary olive oil could prevent ethanol-induced liver damage in rats, but the mechanism might not be related to intestinal tight junction ZO-1 expression.