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首页> 外文会议>ICoMST 2011;International conference of meat science and technology >Differential cellularity and fatty acid profile in subcutaneous and mesenteric fat depots from Portuguese bovine breeds
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Differential cellularity and fatty acid profile in subcutaneous and mesenteric fat depots from Portuguese bovine breeds

机译：葡萄牙牛品种的皮下和肠系膜脂肪贮藏库中的差异性细胞性和脂肪酸谱

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This study focused on the effects of feeding high or low silage diets on the cellularity of subcutaneous and mesenteric fat depots of beef cattle and their implications on the fatty acid profile. Thirty nine bulls from two philogenetically distant Portuguese bovine breeds, Alentejana and Barrosa, were selected. Breed showed no influence on subcutaneous fat deposition and visceral fat partitioning. Plasma adipokines showed an unclear relationship with fatness, as leptin remained constant among experimental groups while interleukin-6 (IL-6) was breed-related. Adipocytes' size and number were determined by the fat depot location, as larger but fewer cells were observed in subcutaneous fat in comparison to mesenteric fat. Breed, diet and fat depot location influenced the fatty acid profile. The incorporation of saturated (SFA), trans, polyunsaturated (PUFA) and branched chain fatty acids (BCFA) was higher in the mesenteric fat depot, whereas the subcutaneous fat depot contained more monounsaturated fatty acids (MUFA). SFA and MUFA proportions revealed the influence of breed, but diet influenced PUFA and BCFA proportions. These results suggest contrasting cellularity and fatty acid biosynthesis in bovine's subcutaneous and mesenteric fats, and reinforce the need to consider factors such as breed and, to a lesser extent, diet.
机译：这项研究集中于饲喂高或低青贮饲料对肉牛皮下和肠系膜脂肪贮库的细胞性及其对脂肪酸谱的影响。从两个亲缘距离远的葡萄牙牛品种阿连特雅纳和巴罗萨选择了39头公牛。品种对皮下脂肪沉积和内脏脂肪分配没有影响。血浆脂肪因子与脂肪之间的关系不清楚，因为实验组中瘦素保持恒定，而白介素6（IL-6）与品种相关。脂肪细胞的大小和数量由脂肪储库位置决定，因为与肠系膜脂肪相比，皮下脂肪中观察到的细胞更大但更少。品种，饮食和脂肪库的位置影响了脂肪酸谱。肠系膜脂肪储库中饱和（SFA），反式，多不饱和（PUFA）和支链脂肪酸（BCFA）的掺入较高，而皮下脂肪储库中含有更多的单不饱和脂肪酸（MUFA）。 SFA和MUFA比例显示出品种的影响，但饮食影响PUFA和BCFA比例。这些结果表明，在牛的皮下和肠系膜脂肪中，细胞结构和脂肪酸的生物合成存在差异，并增强了对诸如繁殖和较小程度的饮食等因素的考虑。

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