Lipids are stored at various sites inside the body as adipose tissue (AT). These include subcutaneous, abdominal, and intermuscular locations. The AT substantially differ in their metabolic function. It is, however, unclear whether AT have specific requirements for individual essential n‐3 and n‐6 fatty acids (FA). If so, control mechanisms would partition FA from the blood. To investigate the hypothesis of a selective FA incorporation, 18 beef heifers were fed diets supplemented with 60 g/kg diet with lipids from either fish oil (FO) or sunflower oil (SO). The lipids had partially been rumen‐protected to ruminal biohydrogenation of n‐3 and n‐6 FA. The AT analyzed for n‐3 and n‐6 FA by gas chromatography were obtained from pericardial, longissimus thoracis (LT) intermuscular, perirenal, and subcutaneous sites. The greatest proportions of n‐3 and n‐6 FA were found in the pericardial AT. Despite generally low abundance, n‐3 FA proportions increased with FO compared to SO supplementation in all AT, but to a different extent. No such partitioning was found for the n‐6 FA when supplementing SO. Concomitantly, the n‐6/n‐3 FA ratio was reduced with FO in all AT, except in the pericardial AT. The latter has specific metabolic functions and thus appears to be quite resistant to diet‐induced changes in FA profile in order to maintain its function. The present findings showed the special role of specific n‐3 and n‐6 FA in bovine AT.

中文翻译：

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瘤胃保护的n-3和n-6脂肪酸优先分配到功能不同的脂肪组织中。

脂质作为脂肪组织（AT）存储在体内的各个位置。这些包括皮下，腹部和肌间位置。AT的代谢功能有很大不同。但是，尚不清楚AT是否对个别必需的n-3和n-6脂肪酸（FA）有特定要求。如果这样，控制机制将使FA与血液分开。为了研究选择性掺入FA的假设，向18头小母牛饲喂补充了60 g / kg膳食的鱼油（FO）或葵花籽油（SO）的脂质。脂质对瘤胃的n-3和n-6 FA生物氢化具有部分保护作用。气相色谱法分析的n-3和n-6 FA的AT取自心包，长经胸（LT）肌间，肾周和皮下部位。心包AT中n-3和n-6 FA的比例最高。尽管总体上丰度较低，但是在所有AT中，与SO添加相比，FO中n-3 FA的比例有所增加，但程度有所不同。补充SO时，未对n-6 FA进行此类划分。同时，除心包AT外，所有AT的FO均使n-6 / n-3 FA比降低。后者具有特定的代谢功能，因此似乎可以抵抗饮食引起的FA曲线变化，从而维持其功能。目前的发现表明特定的n-3和n-6 FA在牛AT中的特殊作用。