Lipid and fatty acid composition of Longissimus thoracis and Semitendinosus muscles in finishing Normand cows given unsaturated lipids and antioxidants

International audienc

La supplémentation en lipides insaturés et en antioxydants de la ration d’engraissement améliore le profil lipidique de la viande de vaches de réforme

Vigie Viande - Réseau d'Information Scientifique et Technique de la Filière Viand

Lipids and fatty acid composition of Longissimus thoracis and Semitendinosus muscles in finishing Normand cows

International audienc

Compared hepatic metabolism of linoleic and linolenic acids of finishing bovines given a n-3 PUFA-rich diet

National audienc

Meat protein aggregation: First investigations on the role of the lipid oxidation product, 4-hydroxy-2-nonenal

International audienceThis paper describes for the first time how 4-hydroxy-2-nonenal (HNE) promotes protein aggregation in meat products. A whole meat extract was incubated with increasing concentrations of HNE during 30min, 1h and 2h at 25°C. In the studied conditions, HNE-protein adducts were detected. In presence of HNE, protein solubility decreased that stressed a possible involvement of HNE in the aggregation process. Different analytical methods were investigated to detect aggregates formation. The aggregation phenomenon remained low. Employed methods give us information on the implicated bonds. Electrophoresis with or without using a reducing agent coupled with western-blotting analyses revealed that HNE attacks preferentially the cysteine residues (by thiols function) and then lysine and histidine

Meat protein aggregation: First investigations on the role of the lipid oxidation product, 4-hydroxy-2-nonenal

International audienceThis paper describes for the first time how 4-hydroxy-2-nonenal (HNE) promotes protein aggregation in meat products. A whole meat extract was incubated with increasing concentrations of HNE during 30min, 1h and 2h at 25°C. In the studied conditions, HNE-protein adducts were detected. In presence of HNE, protein solubility decreased that stressed a possible involvement of HNE in the aggregation process. Different analytical methods were investigated to detect aggregates formation. The aggregation phenomenon remained low. Employed methods give us information on the implicated bonds. Electrophoresis with or without using a reducing agent coupled with western-blotting analyses revealed that HNE attacks preferentially the cysteine residues (by thiols function) and then lysine and histidine

Vitamin E and plant extracts rich in antioxidants given to bovine efficiently protect beef against lipoperoxidation during processing

International audienc

Lipoperoxidation in cattle: consequences on animal health and meat nutritional quality

International audienc

Intérêts des antioxydants dans la prévention des virements de couleur liés aux phénomènes d'oxydation dans la viande bovine

National audienc

Matrix impact on the bioaccessibility of plant polyphenols in the gastric tract

The consumption of fruit and vegetables (F&V) is inversely associated to the development of cardiovascular diseases, several kinds of cancers and other chronic diseases. Moreover, the cardiovascular protection could be ascribed to flavonoids, a class of polyphenols largely distributed in F&V. Polyphenols are poorly absorbed from the gastrointestinal tract (GIT) and undergo extensive metabolization by colon microflora before reaching plasma. Thus, before their absorption, polyphenols could exert a health benefit directly in the GIT. As a matter of fact, they were shown to protect polyunsaturated lipids from oxidation during gastric digestion. The bioaccessibility of polyphenols, defined as their release from the food matrix and solubilization into the bolus, is a prerequisite step