Brown Rice Inhibits Development of Nonalcoholic Fatty Liver Disease in Obese Zucker ( fa / fa ) Rats by Increasing Lipid Oxidation Via Activation of Retinoic Acid Synthesis
The Journal of Nutrition, ISSN: 0022-3166, Vol: 151, Issue: 9, Page: 2705-2713
2021
- 9Citations
- 20Captures
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Metrics Details
- Citations9
- Citation Indexes9
- CrossRef5
- Captures20
- Readers20
- 20
Article Description
White rice and its unrefined form, brown rice, contain numerous compounds that are beneficial to human health. However, the starch content of rice can contribute to obesity, a main risk factor for nonalcoholic fatty liver disease (NAFLD). We investigated the effect of rice consumption on NAFLD and its underlying molecular mechanism. We randomly divided 7-week-old male obese Zucker ( fa / fa ) rats, an animal model of NAFLD, into 3 groups ( n = 10 each) fed 1 of 3 diets for 10 weeks: a control diet (Cont; AIN-93G diet; 53% cornstarch), a white rice diet (WR; AIN-93G diet with cornstarch replaced with white rice powder), or a brown rice diet (BR; AIN-93G diet with cornstarch replaced with brown rice powder). Liver fat accumulation and gene expression related to lipid and vitamin A metabolisms, including retinoic acid (RA) signaling, were analyzed. Hepatic lipid values were significantly decreased in the BR group compared with the Cont group, by 0.4-fold ( P < 0.05). The expression of genes related to hepatic fatty acid oxidation, such as carnitine palmitoyltransferase 2, was approximately 2.1-fold higher in the BR group than the Cont group ( P < 0.05). The expression of peroxisomal acyl-coenzyme A oxidase 1 and acyl-CoA dehydrogenase medium chain was also significantly increased, by 1.6-fold, in the BR group compared with the Cont group ( P < 0.05). The expression of VLDL-secretion-related genes, such as microsomal triglyceride transfer protein, was also significantly higher in the BR group (2.4-fold; P < 0.05). Furthermore, aldehyde dehydrogenase 1 family member A1, an RA synthase gene, was 2-fold higher in the BR group than the Cont group ( P < 0.05). Brown rice prevented development of NAFLD in obese Zucker ( fa / fa ) rats. The beneficial effects of pregelatinized rice on NAFLD could be manifested as increased fatty acid oxidation and VLDL secretion, which are regulated by RA signaling.
Bibliographic Details
http://www.sciencedirect.com/science/article/pii/S002231662200339X; http://dx.doi.org/10.1093/jn/nxab188; http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85116376023&origin=inward; http://www.ncbi.nlm.nih.gov/pubmed/34224565; https://linkinghub.elsevier.com/retrieve/pii/S002231662200339X; https://dx.doi.org/10.1093/jn/nxab188
Elsevier BV
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