Department of Food Science , University of Massachusetts , Amherst , Massachusetts 01003 , United States.
J Agric Food Chem. 2018 Apr 18;66(15):3939-3948. doi: 10.1021/acs.jafc.8b00677. Epub 2018 Apr 9.
Phospholipids have been shown to act synergistically with tocopherols and delay lipid oxidation in bulk oil. The synergistic activity between phospholipids and tocopherols is due to the ability of amino-group-containing phospholipids (e.g., phosphatidylethanolamine (PE) and phosphatidylserine (PS)) to convert oxidized tocopherol back into tocopherols. This study shows the effect of PE and PS on the antioxidant activity of different tocopherol homologues in oil-in-water emulsions. Effect of emulsifier type on the interaction between tocopherols and phospholipids was also studied. δ-Tocopherol and PE exhibited greater antioxidant activity as compared to α-tocopherol and PE. PS displayed 1.5-3 times greater synergism than PE with Tween 20 as emulsifier whereas both PE and PS had a similar antioxidant activity in the presence of α-tocopherol when bovine serum albumin was used as the emulsifier. This study is the first to show that PE and PS can act synergistically with tocopherols to inhibit lipid oxidation in oil-in-water emulsions and can present a new clean label antioxidant strategy for food emulsions.
已证实磷脂与生育酚协同作用，可延缓大量油中的脂质氧化。磷脂和生育酚之间的协同活性归因于含氨基的磷脂（例如，磷脂酰乙醇胺（PE）和磷脂酰丝氨酸（PS））将氧化生育酚还原回生育酚的能力。本研究显示了 PE 和 PS 对水包油乳液中不同生育酚同系物抗氧化活性的影响。还研究了乳化剂类型对生育酚和磷脂之间相互作用的影响。与 PE 相比，δ-生育酚和 PS 表现出更高的抗氧化活性。当使用牛血清白蛋白作为乳化剂时，PS 与吐温 20 作为乳化剂相比具有 1.5-3 倍更高的协同作用，而当使用α-生育酚时，PE 和 PS 具有相似的抗氧化活性。这项研究首次表明，PE 和 PS 可以与生育酚协同作用，抑制水包油乳液中的脂质氧化，并为食品乳液提供一种新的清洁标签抗氧化策略。
