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首页> 外文期刊>Livestock Science >Effect of feeding fermentable fiber on synthesis of total and mucosal protein in the intestine of the growing pig.
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Effect of feeding fermentable fiber on synthesis of total and mucosal protein in the intestine of the growing pig.

机译：饲喂可发酵纤维对生长猪肠道中总蛋白和粘膜蛋白合成的影响。

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In a previous study, a reduced efficiency of ileal digestible threonine (THR) use for body protein deposition was observed in growing pigs when pectin was included in the diet. This response was not due to increased physical endogenous ileal THR loss. Our aim was to explore the contribution of diet-induced increases in protein synthesis in the colon, especially mucins, to dietary THR requirements. Twelve barrows (21 kg mean BW) were fed either a cornstarch-soybean meal-based diet (Control) or Control with 12% pectin (Pectin). Pigs were given intravenously 1.5 mmol/kg BW of L-1-13C valine (40 mol%) to measure fractional and absolute synthesis rates (FSR, ASR, respectively) of mucosal and whole intestinal protein in the jejunum and colon. Dietary pectin inclusion increased plasma levels of glucose, isoleucine and glutamine (P<0.05) but had no effect on insulin or urea nitrogen (P>0.10). There were no differences in FSR and ASR of whole intestinal protein in jejunum and colon (P>0.10). The FSR of mucosal proteins in colon, not in jejunum, was increased with dietary pectin supplementation (P<0.05). Assuming mucosal protein mass is constant, these results imply that the higher protein synthesis in colon mucosa contributes to the reduced THR efficiency observed in pectin-supplemented diet..
机译：在先前的研究中，当在饮食中加入果胶时，在生长中的猪中发现回肠可消化苏氨酸（THR）用于体内蛋白质沉积的效率降低。这种反应不是由于物理内源性回肠THR损失增加所致。我们的目的是探讨饮食引起的结肠（尤其是粘蛋白）中蛋白质合成增加对饮食中THR需求的贡献。用玉米淀粉-豆粕基饮食（对照）或含12％果胶（果胶）的对照饲喂十二头公猪（平均体重21千克）。给猪静脉内注射1.5 mmol / kg BW的L-1-13C缬氨酸（40 mol％），以测量空肠和结肠中粘膜和整个肠蛋白的部分合成率和绝对合成率（分别为FSR，ASR）。日粮中的果胶含量增加了血浆葡萄糖，异亮氨酸和谷氨酰胺的水平（P <0.05），但对胰岛素或尿素氮没有影响（P> 0.10）。空肠和结肠中全肠蛋白的FSR和ASR均无差异（P> 0.10）。饮食中添加果胶可提高结肠而非空肠黏膜蛋白的FSR（P <0.05）。假设粘膜蛋白质量恒定，这些结果表明结肠粘膜中较高的蛋白合成有助于在补充果胶的饮食中观察到降低的THR效率。

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