n-3 PUFA added to high-fat diets affect differently adiposity and inflammation when carried by phospholipids or triacylglycerols in mice

Nutrition & Metabolism

Marie-Caroline Michalski³  Claude Genot⁴  Michel Lagarde⁵  Michel Guichardant⁵  Cyrille Debard²  Berengère Benoit¹  Lucie Ribourg⁴  Michèle Viau⁴  Alain Géloën⁵  Lilas Hadji⁵  Christophe O Soulage⁵  Anne Meynier⁴  Manar Awada⁵ 

[1] Université de Lyon, Villeurbanne, F-69622, France;INSERM U1060, CarMeN, Oullins, F-69921, France;INRA USC1362, INSERM U1060, Cardiovasculaire Métabolisme diabétologie et Nutrition, CarMeN Laboratory, InFoLip team, IMBL Building, INSA-Lyon, 11 avenue Jean Capelle, Villeurbanne cedex, 69621, France;INRA, UR1268 BIA, Nantes, F-44316, France;INSA-Lyon, IMBL, Villeurbanne, F-69621, France

关键词: Adipose tissue;    Oxidative stress;    Inflammation;    High-fat diet;    Triacylglycerol;    Phospholipid;    n-3 PUFA;   

Others  :  804754
DOI  :  10.1186/1743-7075-10-23

 received in 2012-09-20, accepted in 2013-01-03,  发布年份 2013

【 摘 要 】

Background

Dietary intake of n-3 polyunsaturated fatty acids (PUFA) is primarily recognized to protect against cardiovascular diseases, cognitive dysfunctions and the onset of obesity and associated metabolic disorders. However, some of their properties such as bioavailability can depend on their chemical carriers. The objective of our study was to test the hypothesis that the nature of n-3 PUFA carrier results in different metabolic effects related to adiposity, oxidative stress and inflammation.

Methods

4 groups of C57BL/6 mice were fed for 8 weeks low fat (LF) diet or high-fat (HF, 20%) diets. Two groups of high-fat diets were supplemented with long-chain n-3 PUFA either incorporated in the form of phospholipids (HF-ω3PL) or triacylglycerols (HF-ω3TG).

Results

Both HF-ω3PL and HF-ω3TG diets reduced the plasma concentrations of (i) inflammatory markers such as monocyte chemoattractant protein-1 (MCP-1) and interleukin 6 (IL-6), (ii) leptin and (iii) 4-hydroxy-2-nonenal (4-HNE), a marker of n-6 PUFA-derived oxidative stress compared with the control HF diet. Moreover, in both HF-ω3PL and HF-ω3TG groups, MCP-1 and IL-6 gene expressions were decreased in epididymal adipose tissue and the mRNA level of gastrointestinal glutathione peroxidase GPx2, an antioxidant enzyme, was decreased in the jejunum compared with the control HF diet. The type of n-3 PUFA carrier affected other outcomes. The phospholipid form of n-3 PUFA increased the level of tocopherols in epididymal adipose tissue compared with HF-ω3TG and resulted in smaller adipocytes than the two others HF groups. Adipocytes in the HF-ω3PL and LF groups were similar in size distribution.

Conclusion

Supplementation of mice diet with long-chain n-3 PUFA during long-term consumption of high-fat diets had the same lowering effects on inflammation regardless of triacyglycerol or phospholipid carrier, whereas the location of these fatty acids on a PL carrier had a major effect on decreasing the size of adipocytes that was not observed with the triacyglycerol carrier. Altogether, these results would support the development functional foods containing LC n-3 PUFA in the form of PL in order to prevent some deleterious outcomes associated with the development of obesity.

【 授权许可】

   
2013 Awada et al; licensee BioMed Central Ltd.

【 图 表 】

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