Abstract Title:

Rats fed fructose-enriched diets have characteristics of nonalcoholic hepatic steatosis.

Abstract Source:

J Nutr. 2009 Nov;139(11):2067-71. Epub 2009 Sep 23. PMID: 19776184

Abstract Author(s):

Takahiro Kawasaki, Kanji Igarashi, Tatsuki Koeda, Keiichiro Sugimoto, Kazuya Nakagawa, Shuichi Hayashi, Ryoichi Yamaji, Hiroshi Inui, Toshio Fukusato, Toshikazu Yamanouchi

Article Affiliation:

Department of Internal Medicine, Teikyo University School of Medicine, Tokyo, Japan. t-kawa@med.teikyo-u.ac.jp

Abstract:

Nonalcoholic steatohepatitis (NASH) and nonalcoholic fatty liver disease are increasing in adults and are likely to be increasing in children. Both conditions are hepatic manifestations of metabolic syndrome. Experimental animals fed fructose-enriched diets are widely recognized as good models for metabolic syndrome. However, few reports have described the hepatic pathology of these experimental animals. In this study, 5-wk-old Wistar specific pathogen-free rats, which are a normal strain, were fed experimental diets for 5 wk. We then evaluated the degree of steatohepatitis. The 5 diet groups were as follows: cornstarch (70% wt:wt) [control (C)], high-fructose (70%) (HFr), high-sucrose (70%) (HS), high-fat (15%) (HF), and high-fat (15%) high-fructose (50%) (HFHFr) diets. The macrovesicular steatosis grade, liver:body weight ratio, and hepatic triglyceride concentration were significantly higher in the HFr group than in the other 4 groups. However, the HFr group had a significantly lower ratio of epididymal white fat:body weight than the other 4 groups and had a lower final body weight than the HF and HFHFr groups. The HF group had a greater final body weight than the C, HFr, and HS groups, but no macrovesicular steatosis was observed. The HFr group had a significantly higher grade of lobular inflammation than the other 4 groups. The distribution of lobular inflammation was predominant over portal inflammation, which is consistent with human NASH. In conclusion, rats fed fructose-enriched diets are a better model for NASH than rats fed fat-enriched diets.

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