Premium
Influence of chronic stress on the compositions of hepatic cholesterol and triglyceride in male Wistar rats fed a high fat diet
Author(s) -
Gao Siyuan,
Han Xue,
Fu Jihua,
Yuan Xiaoling,
Sun Xing,
Li Qiang
Publication year - 2012
Publication title -
hepatology research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.123
H-Index - 75
eISSN - 1872-034X
pISSN - 1386-6346
DOI - 10.1111/j.1872-034x.2011.00961.x
Subject(s) - medicine , endocrinology , triglyceride , cholesterol , oxidative stress , high density lipoprotein , malondialdehyde , fatty liver , steatosis , chemistry , disease
Aim: We determined the influence of chronic stress (CS) on the compositions of hepatic cholesterol and triglyceride (TG) in rats fed a high fat diet (HFD). Methods: Male Wistar rats were fed either a standard diet or a HFD and half of the HFD fed rats were given CS (electric foot shock assisted with noise) for 8 weeks. Results: Compared with the control group, the levels of hepatic total cholesterol (TC) and TG were significantly elevated in the HFD and HFD with chronic stress (HFD+CS) groups, and the more severe elevations of them were found in the HFD group. Inversely, the more severe elevations of hepatic water‐soluble parts of TC and TG were found in the HFD+CS group, as the elevations of low‐density lipoprotein cholesterol, very low‐density lipoprotein cholesterol in liver and serum, tumor necrosis factor‐α, interleukin‐1β and malondialdehyde in liver. Meanwhile, downregulated mRNA expressions of hepatic liver X receptor‐α ( LXR‐α ) and peroxisome proliferator‐activated receptor‐γ ( PPAR‐γ ) were also more severe in the HFD+CS group. Conclusion: CS can aggravate the high levels of water‐soluble compositions of hepatic TC and TG induced by HFD as it aggravates hepatic inflammation and oxidative stress; in spite of that, however, it cannot further promote hepatic lipidosis. This is consistent with the downregulated mRNA expressions of LXR‐α and PPAR‐γ .