Refeeding with conjugated linoleic acid increases serum cholesterol and modifies the fatty acid profile after 48 hours of fasting in rats.

Autor: de Castro GS; Department of Internal Medicine, Faculty of Medicine of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP. Brazil.. gabriela.castro@usp.br., Andreoli MF; Food Science and Nutrition, Department of Biological Sciences, School of Biochemistry and Biological Sciences, Universidad Nacional del Litoral, Santa Fe. Argentina.. mfandreoli@hotmail.com., Illesca PG; Food Science and Nutrition, Department of Biological Sciences, School of Biochemistry and Biological Sciences, Universidad Nacional del Litoral, Santa Fe. Argentina.. paolaillesca@hotmail.com., Payão Ovídio P; Department of Internal Medicine, Faculty of Medicine of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP. Brazil.. ppayao@hotmail.com., Bernal CA; Food Science and Nutrition, Department of Biological Sciences, School of Biochemistry and Biological Sciences, Universidad Nacional del Litoral, Santa Fe. Argentina.. cbernal@fbcb.unl.edu.ar., Jordão AA; Department of Internal Medicine, Faculty of Medicine of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP. Brazil.. alceu@fmrp.usp.br., Vannucchi H; Department of Internal Medicine, Faculty of Medicine of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP. Brazil.. hvannucc@fmrp.usp.br.
Jazyk: angličtina
Zdroj: Nutricion hospitalaria [Nutr Hosp] 2014 Dec 01; Vol. 30 (6), pp. 1303-12. Date of Electronic Publication: 2014 Dec 01.
DOI: 10.3305/nh.2014.30.6.7945
Abstrakt: There is no consensus about the effects of conjugated linoleic acid (CLA) on lipid metabolism, especially in animals fed a high-fat diet. Therefore, the objective of the present study was to evaluate the incorporation of CLA isomers into serum, liver and adipose tissue, as well as the oxidative stress generated in rats refed with high-fat diets after a 48 hour fast. Rats were refed with diets containing soybean oil, rich in linoleic acid [7% (Control Group - C) or 20% (LA Group)], CLA [CLA Group - 20% CLA mixture (39.32 mole% c9,t11-CLA and 40.59 mole% t10,c12- CLA)], soybean oil + CLA (LA+CLA Group - 15.4% soybean oil and 4.6% CLA) or animal fat (AF, 20% lard). The CLA group showed lower weight gain and liver weight after refeeding, as well as increased serum cholesterol. The high dietary fat intake induced fat accumulation and an increase in -tocopherol in the liver, which were not observed in the CLA group. Circulating -tocopherol was increased in the CLA and CLA+LA groups. The high- fat diets reduced liver catalase activity. CLA isomers were incorporated into serum and tissues. In this shortterm refeeding experimental model, CLA prevented hepatic fat accumulation, although it produced an increase in serum cholesterol.
(Copyright AULA MEDICA EDICIONES 2014. Published by AULA MEDICA. All rights reserved.)
Databáze: MEDLINE
Externí odkaz: