Effects of n-3 polyunsaturated fatty acids high fat diet intervention on the synthesis of hepatic high-density lipoprotein cholesterol in obesity-insulin resistance rats.
BACKGROUND
n-3 polyunsaturated fatty acids (PUFA) have previously been demonstrated in association with a reduced risk of chronic diseases, including insulin resistance, cancer and cardiovascular disease. In the present study, we analyzed the effects of n-3 PUFA-rich perilla oil (PO) and fish oil (FO) high fat diet intervention against the synthesis of hepatic high-density lipoprotein cholesterol (HDL-c) in obesity-insulin resistance model rats.


METHODS
In the modeling period, the male SD rats were randomly divided into 2 groups. The rats in the high fat (HF) group were given a high fat pure diet containing 20.62% lard. In the intervention period, the model rats were intervened with purified high-fat diets rich in PO or FO, containing same energy content with high fat pure diet in HF. After the intervention, the protein and mRNA expressions status of the key genes involved in synthesis of hepatic HDL-c were measured for further analytic comparison.


RESULTS
The obesity-insulin resistance model rats were characterized by surprisingly high levels of serum triglyceride (TG) and increased body weight (P < 0.05, each). After the intervention, there were no apparent changes in the serum HDL-c and total cholesterol (TCH). In addition, the FO could up-regulate the hepatic adenosine triphosphate (ATP) binding cassette transporter A1 (ABCA1) mRNA (P < 0.01) and protein expressions, as well as increase the level of serum apolipoprotein A-1 (apoA-1) (P < 0.0001), and elevate the hepatic apoA-1mRNA expression (P < 0.01). Different from FO, the PO specifically elevated the hepatic ABCA1mRNA expression (P < 0.01).


CONCLUSIONS
The FO high fat diets promoted the synthesis of HDL-c in the obesity-insulin resistance rats.
Laboratory Animal Center of the Academy of Military Medical Sciences, Beijing, 100071, China.
Xianxing
X
Xie
Laboratory Animal Center of the Academy of Military Medical Sciences, Beijing, 100071, China.
Tao
T
Zhang
Laboratory Animal Center of the Academy of Military Medical Sciences, Beijing, 100071, China.
Shuang
S
Zhao
Laboratory Animal Center of the Academy of Military Medical Sciences, Beijing, 100071, China.
Wei
W
Li
Laboratory Animal Center of the Academy of Military Medical Sciences, Beijing, 100071, China.
Lanzhi
L
Ma
Laboratory Animal Center of the Academy of Military Medical Sciences, Beijing, 100071, China.
Ming
M
Ding
Laboratory Animal Center of the Academy of Military Medical Sciences, Beijing, 100071, China. Bj_liuyuan@163.com.
Yuan
Y
Liu
D064286:ATP Binding Cassette Transporter 1 / Q000235:genetics; D000818:Animals; D016632:Apolipoprotein A-I / Q000097:blood / Q000235:genetics / Q000378:metabolism; D001835:Body Weight / Q000187:drug effects; D008076:Cholesterol, HDL / Q000096:biosynthesis*; D015525:Fatty Acids, Omega-3 / Q000494:pharmacology*; D005395:Fish Oils / Q000494:pharmacology; D005786:Gene Expression Regulation / Q000187:drug effects; D007333:Insulin Resistance; D008055:Lipids / Q000097:blood; D008099:Liver / Q000187:drug effects / Q000378:metabolism; D008297:Male; D009765:Obesity / Q000178:diet therapy* / Q000378:metabolism; D017207:Rats, Sprague-Dawley
D064286:ATP Binding Cassette Transporter 1; D016632:Apolipoprotein A-I; D008076:Cholesterol, HDL; D015525:Fatty Acids, Omega-3; D005395:Fish Oils; D008055:Lipids; C577834:Abca1 protein, rat
High density lipoprotein cholesterol; Insulin resistance; Liver; Serum lipids; n-3 polyunsaturated fatty acids