Fatty acid profiles of muscle, liver, heart and kidney of Australian prime lambs fed different polyunsaturated fatty acids enriched pellets in a feedlot system
Fatty acid profiles of muscle, liver, heart and kidney of Australian prime lambs fed different polyunsaturated fatty acids enriched pellets in a feedlot system
复制标题
DOI：
10.1038/s41598-018-37956-y
复制
发表时间：
2019-02-04
影响因子：
4.6
通讯作者：
Malau-Aduli, Aduli Enoch Othniel
中科院分区：
文献类型：
--
作者：
Hung Van Le;Don Viet Nguyen;Malau-Aduli, Aduli Enoch Othniel
我们研究了不同来源的多不饱和脂肪酸（PUFA）对澳洲优质羔羊肌肉、肝脏、心脏和肾脏脂肪酸组成的影响。将72只6月龄断奶的白色萨福克×考里德尔一交羔羊随机分为6组：（1）对照组：只饲喂卢塞恩干草;（4）过瘤胃保护（RPO）、（5）亚麻籽（FSO）和（6）红花（SO）来源。CO、FSO、SO和RPO处理的羔羊背最长肌中二十碳五烯酸（EPA，22：5 n-3）和二十二碳六烯酸（DHA，22：6 n-3）的含量范围为31.1至57.1 mg/135 g，超过了澳大利亚指南规定的“来源”阈值30 mg/标准份（135 g）。饲喂植物源性膳食油的羔羊背最长肌中n-3 LC-PUFA含量无差异。结果表明，在FSO饲料中，肌肉、肝脏和心脏中18：3 n-3（ALA）含量最高，分别为45.6、128.1和51.3 mg/100 g。肝脏和肾脏含有高含量的n-3 LC-PUFA（范围分别为306.7至598.2 mg/100 g和134.0至300.4 mg/100 g），所有值都超过了“良好来源”状态（根据澳大利亚指南，每份60 mg）。根据澳大利亚和新西兰食品标准指南规定的EPA和DHA含量，饲喂PUFA的羔羊的肝脏和肾脏可标记为n-3 LC-PUFA的“良好来源”。因此，如果羊肉消费者考虑食用肝脏和肾脏作为膳食蛋白质来源，他们可以充分获得n-3 LC-PUFA的相关健康益处。
We investigated the effect of various dietary polyunsaturated fatty acid (PUFA) sources on the fatty acid profiles of muscle, liver, heart and kidney of Australian prime lambs. Seventy-two White Suffolk x Corriedale first-cross lambs weaned at 6 months of age were randomly allocated to the following six treatments: (1) Control: Lucerne hay only; wheat-based pellets infused with 50 ml/kg dry matter (DM) of oil from (2) rice bran (RBO); (3) canola (CO); (4) rumen-protected (RPO), (5) flaxseed (FSO) and (6) safflower (SO) sources in a completely randomized experimental design. Lambs in CO, FSO, SO and RPO treatments achieved contents of eicosapentaenoic acid (EPA, 22:5n-3) plus docosahexaenoic acid (DHA, 22:6n-3) in the longissimus dorsi muscle ranging from 31.1 to 57.1 mg/135 g, over and above the 30 mg per standard serve (135 g) threshold for "source" claim under the Australian guidelines. There was no difference in n-3 LC-PUFA contents in longissimus dorsi muscle of lambs fed dietary oils of plant origin. The highest 18:3n-3 (ALA) contents achieved with FSO diet in the muscle, liver and heart were 45.6, 128.1 and 51.3 mg/100 g, respectively. Liver and kidney contained high contents of n-3 LC-PUFA (ranging from 306.7 to 598.2 mg/100 g and 134.0 to 300.4 mg/100 g, respectively), with all values readily exceeding the 'good source' status (60 mg per serve under Australian guidelines). The liver and kidney of PUFA fed lambs can be labelled as 'good source' of n-3 LC-PUFA based on EPA and DHA contents stipulated by the Food Standards of Australia and New Zealand guidelines. Therefore, if lamb consumers consider eating the liver and kidney as their dietary protein sources, they can adequately obtain the associated health benefits of n-3 LC-PUFA.