Soares M C
J Nutr. 1986 Aug;116(8):1473-9. doi: 10.1093/jn/116.8.1473.
Pregnant goats were fed either a control diet or one in which part of the concentrate ration was replaced, for either the last 2 mo or the last month of gestation, with a polyunsaturated fatty acid supplement protected from biohydrogenation in the rumen. On the day of parturition, goats fed a supplemented diet, during either 1 or 2 mo before parturition, exhibited markedly higher concentrations of linoleic acid in the major plasma lipid fractions, i.e., phospholipids, cholesteryl esters, triacylglycerols and nonesterified fatty acids, than did goats not fed the supplement. At birth, the four main lipid fractions in the plasma of the kids from goats fed the supplemented diet, during either 1 or 2 mo before parturition, exhibited considerably higher proportions of linoleic and arachidonic acids and lower proportions of eicosatrienoic acid than did those of newborn kids from unsupplemented mothers. These findings show appreciable transfer of lipids across the placenta and demonstrate that the low essential fatty acids status of kids at birth can be raised by this particular manipulation of the maternal diet.
给怀孕的山羊喂食对照日粮，或者在妊娠的最后2个月或最后1个月，用一种在瘤胃中可防止生物氢化的多不饱和脂肪酸补充剂替代部分精料日粮。在分娩当天，在分娩前1个月或2个月期间喂食补充日粮的山羊，其主要血浆脂质组分（即磷脂、胆固醇酯、三酰甘油和非酯化脂肪酸）中的亚油酸浓度，显著高于未喂食补充剂的山羊。在出生时，在分娩前1个月或2个月期间喂食补充日粮的山羊所产羔羊血浆中的四种主要脂质组分，其亚油酸和花生四烯酸的比例明显更高，而二十碳三烯酸的比例则低于未补充日粮的母羊所产新生羔羊。这些发现表明脂质可通过胎盘进行明显转移，并证明通过对母体日粮进行这种特定处理，可以提高出生时羔羊必需脂肪酸水平较低的状况。
