1. Glucose addition and oven-heating of pork stimulate glycoxidation and protein carbonylation, while reducing lipid oxidation during simulated gastrointestinal digestion.
- Author
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Tian, Xiaona, Vossen, Els, De Smet, Stefaan, and Van Hecke, Thomas
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MAILLARD reaction , *GLUCOSE , *DIGESTION , *PORK , *OXIDATION , *MEAT analysis , *LIPIDS , *CARBONYLATION - Abstract
In the present study, it was investigated if glucose addition (3 or 5%) to pork stimulates glycoxidation (pentosidine, PEN), glycation (Maillard reaction products, MRP), lipid oxidation (4-hydroxy-2-nonenal, 4-HNE; hexanal, HEX; thiobarbituric acid reactive substances, TBARS), and protein oxidation (protein carbonyl compounds, PCC) during various heating conditions and subsequent in vitro gastrointestinal digestion. An increase in protein-bound PEN level was observed during meat digestion, which was significantly stimulated by glucose addition (up to 3.3-fold) and longer oven-heating time (up to 2.5-fold) of the meat. These changes were accompanied by the distinct formation of MRP during heating and digestion of the meats. Remarkably, stimulated glyc(oxid)ation was accompanied by increased protein oxidation, whereas lipid oxidation was decreased, indicating these reactions are interrelated during gastrointestinal digestion of meat. Glucose addition generally didn't affect these oxidative reactions when pork was packed preventing air exposure and oven-heated until a core temperature of 75 °C was reached. [Display omitted] • Pentosidine content increased following gastrointestinal digestion of heated pork. • Glucose and long heating stimulated pentosidine levels in pork (digests). • High pentosidine levels were accompanied by low lipid- but high protein oxidation. • Low pentosidine levels in digests were seen when meat was packed and mildly heated. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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