Li D, Ng A, Mann N J, Sinclair A J
Department of Food Science, RMIT University, Melbourne, VIC, Australia.
Lipids. 1998 Apr;33(4):437-40. doi: 10.1007/s11745-998-0225-7.
Arachidonic acid (AA) in the diet can be efficiently absorbed and incorporated into tissue membranes, resulting in an increased production of thromboxane A2 by platelets and increased ex vivo platelet aggregability. Results from previous studies have shown that AA is concentrated in the membrane phospholipids of lean meats. However, the concentration of AA in the visible fat portion of meats also may be significant despite being ignored in most studies. The aim of this study was to accurately quantitate the AA content of visible fat and the lean portion of beef, lamb, pork, chicken, duck, and turkey. The visible fat of meat contained a significant quantity of AA, ranging from 20 to 180 mg/100 g fat, whereas the AA content of the lean portion of meat was lower, ranging from 30 to 99 mg/100 g lean meat. Beef and lamb meats contained lower levels of AA in both the visible fat and lean portion than that from the other species. The highest level of AA in lean meat was in duck (99 mg/100 g), whereas pork fat had the highest concentration for the visible fats (180 mg/100 g). The lean portions of beef and lamb contained the higher levels of n-3 polyunsaturated fatty acids (PUFA) compared with white meats which were high in AA and low in n-3 PUFA. The present data indicate that the visible meat fat can make a contribution to dietary intake of AA, particularly for consumers with high intakes of fat from pork or poultry meat.
饮食中的花生四烯酸（AA）能够被有效吸收并整合到组织膜中，导致血小板生成更多的血栓素A2，体外血小板聚集性增强。以往研究结果表明，AA集中在瘦肉的膜磷脂中。然而，肉类可见脂肪部分的AA含量可能也很可观，尽管在大多数研究中被忽视了。本研究的目的是准确测定牛肉、羊肉、猪肉、鸡肉、鸭肉和火鸡肉的可见脂肪和瘦肉部分的AA含量。肉类的可见脂肪含有大量的AA，范围为20至180毫克/100克脂肪，而肉类瘦肉部分的AA含量较低，范围为30至99毫克/100克瘦肉。牛肉和羊肉的可见脂肪和瘦肉部分的AA含量均低于其他物种。瘦肉中AA含量最高的是鸭肉（99毫克/100克），而猪肉脂肪的可见脂肪中AA浓度最高（180毫克/100克）。与富含AA且n-3多不饱和脂肪酸（PUFA）含量低的白肉相比，牛肉和羊肉的瘦肉部分含有更高水平的n-3 PUFA。目前的数据表明，肉类可见脂肪可对AA的膳食摄入做出贡献，特别是对于猪肉或禽肉脂肪摄入量高的消费者。
