Dietary lipid-induced changes in enzymes of hepatic lipid metabolism

Abstract Objective To investigate the effect of different dietary oils on the main hepatic enzymes involved in metabolism and their impact on oxidative stress status. Methods Twenty-four male Wistar rats were fed for 60 d on the same basal diet plus different lipid sources from commercial oils: soyb...

Full description

Saved in:
Bibliographic Details
Published in:Nutrition (Burbank, Los Angeles County, Calif.) Los Angeles County, Calif.), 2013-02, Vol.29 (2), p.462-469
Main Authors: Hurtado de Catalfo, Graciela E., Ph.D, de Alaniz, María J.T., Ph.D, Marra, Carlos A., Ph.D
Format: Article
Language:English
Subjects:
Animals
Antioxidants
Antioxidants - metabolism
Biological and medical sciences
biomarkers
blood lipids
Coconut Oil
coconuts
Diet
Dietary Fats - pharmacology
Dietary oils
enzyme activity
Enzymes
Enzymes of lipid metabolism
fatty acid composition
Fatty acids
Fatty Acids, Omega-3 - pharmacology
Fatty Acids, Omega-6 - pharmacology
Feeding. Feeding behavior
Fundamental and applied biological sciences. Psychology
Gastroenterology and Hepatology
Grape Seed Extract - pharmacology
grape seeds
Lipid composition
lipid metabolism
Lipid Metabolism - drug effects
Lipids
liver
Liver - drug effects
Liver - enzymology
Male
Metabolism
nitrates
nitrites
Olive Oil
olives
Oxidative stress
Oxidative Stress - drug effects
Plant Oils - pharmacology
Rats
Rats, Wistar
Rodents
Soybean Oil - pharmacology
soybeans
Vegetable oils
Vertebrates: anatomy and physiology, studies on body, several organs or systems
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Abstract Objective To investigate the effect of different dietary oils on the main hepatic enzymes involved in metabolism and their impact on oxidative stress status. Methods Twenty-four male Wistar rats were fed for 60 d on the same basal diet plus different lipid sources from commercial oils: soybean (S), olive (O), coconut (C), and grape seed (G). After sacrifice, the liver lipid fatty acid composition, enzymatic and non-enzymatic components of the antioxidant defense system, and the activity of enzymes involved in lipid metabolism were determined. The concentration of Ca2+ in plasma and liver homogenates was also measured. Results The diets produced significant changes in the total and polar lipid fatty acid compositions and alterations in key enzyme activities involved in lipid metabolism. The S and G groups showed significantly increased oxidative stress biomarkers. The enzymatic and non-enzymatic components of the antioxidant defense system were increased in the O and C groups. The highest levels of nitrite plus nitrate were observed in the S and G groups compared with the O and C groups in plasma and in liver homogenates. These were directly correlated with the Ca2+ concentration. The most beneficial effects were obtained with olive oil. However, it is necessary to study in more detail appropriate mixtures of olive and soybean oils to provide an adequate balance between ω-3 and ω-6 fatty acids. Conclusion Different dietary oils modify the lipid composition of the plasma and liver, local and systemic antioxidant statuses, and the activity of the key enzymes of lipid metabolism. The interrelation between Ca2+ and nitrite plus nitrate could be the causal factor underlying the observed changes.
ISSN:0899-9007
1873-1244
DOI:10.1016/j.nut.2012.07.012