Effect of Dietary Protein Level on the Expression of Proteins in the Gastrointestinal Tract of Young Pigs

文献类型： 外文期刊

第一作者： Ma, Xianyong

作者： Ma, Xianyong;Tian, Zhimei;Deng, Dun;Cui, Yiyan;Qiu, Yueqin;Ma, Xianyong;Tian, Zhimei;Deng, Dun;Cui, Yiyan;Qiu, Yueqin;Ma, Xianyong;Tian, Zhimei;Deng, Dun;Cui, Yiyan;Qiu, Yueqin;Ma, Xianyong;Tian, Zhimei;Deng, Dun;Cui, Yiyan;Qiu, Yueqin

作者机构：

关键词： protein level; protein expression; gastrointestinal tract; pigs

期刊名称：JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY （ 影响因子：5.279； 五年影响因子：5.269 ）

ISSN： 0021-8561

年卷期： 2018 年 66 卷 17 期

页码：

收录情况： SCI

摘要： The objective of this research is to investigate the effect of protein level on proteins expression in the gastrointestinal tract of young pigs. Eighteen piglets (Duroc X Landrace X Yorkshire) were weaned at 28 days of age and randomly assigned to three diets with 20%, 17%, and 14% CP level, and four essential amino acids, Lys, Met, Thr, and Trp, in three diets met the requirements of weaned piglets. The experimental period lasted 45 days. Compared with the control (20% CP level), the average daily feed intake, the average daily gain, and gain feed ratio of the 17% CP group did not decrease (P > 0.05), but those of 14% CP group decreased (P < 0.05). The proteomics profiles result of three tissues (gastric antrum, duodenum, and jejunum) showed that, compared with the control, the immune system, protein digestion and absorption, lipid or carbon digestion and absorption, etc. were up-regulated in 17% CP group, while most of them were down-regulated in 14% CP group. Amino acids metabolism of gastric, pancreatic secretion of duodenum or steroid hormone biosynthesis of jejunum was down-regulated in the 17% CP group, but the lipid metabolism was up-regulated in the 14% CP group. Six proteins were selected for identification by Western blot, and their changes had the same trend as the proteomics results. The protein level decreased from 20% to 17%, the growth performance was not affected, while the nutrient digestion and absorption or the immune function were improved, which implied that 17% protein level maybe benefit for nutrients absorption of pigs.

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