NDLI: Effects of reducing dietary protein on the expression of nutrition sensing genes (amino acid transporters) in weaned piglets

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Effects of reducing dietary protein on the expression of nutrition sensing genes (amino acid transporters) in weaned piglets

Content Provider	Springer Nature Link
Author	Wu, Li He, Liu qin Cui, Zhi jie Liu, Gang Yao, Kang Wu, Fei Li, Jun Li, Tie jun
Copyright Year	2015
Abstract	The effects of crude protein (CP) levels in the diet on the mRNA expression of amino acid (AA) transporters were studied in a 45-d trial. Eighteen piglets with an initial body weight (BW) of 9.57 kg were assigned to three groups (14%, 17%, and 20% CP in the diet) in a completely randomized design (six replicates per treatment). Diets were supplemented with crystalline AA to achieve equal standardized ileal digestible contents of Lys, Met plus Cys, Thr, and Trp, and were provided ad libitum. After 45 d, all piglets were slaughtered to collect small intestine samples. Compared with the values in the 14% CP group, the expressions of ASCT2, 4F2hc, and ATB0 mRNA in the jejunum were increased by 23.00%, 12.00%, 6.00% and 48.00%, 47.00%, 56.00% in the 17% and 20% CP groups, respectively. These results indicate that a 14% CP diet supplemented with crystalline AA may not transport enough AA into the body and maintain growth performance of piglets. However, a reduction of dietary 17% CP may reduce the excretion of nitrogen into the environment while supporting the development of piglets. Therefore, the 17% CP level is more suitable than 14% CP level.验证日粮中粗蛋白质浓度对断奶仔猪氨基酸转运载体的影响效应。从营养物质感应体的角度分析采用低氮日粮的可行性, 并探索营养限制对营养转运体的影响及它们间的相互作用。十八头初始体重9.57 公斤的断奶仔猪被随机分为三组 (每组6 个重复), 分别饲喂含有14%、17%和20%的粗蛋白日粮45 天。按照理想蛋白质模型, 日粮分别添加赖氨酸、蛋氨酸+半胱氨酸、苏氨酸和色氨酸来满足断奶仔猪的需要, 整个试验期自由采食。试验结束后, 屠宰仔猪并采集小肠样品。与14%粗蛋白组相比, 空肠中ASCT2、4F2hc 和ATB0 mRNA 表达在17%和20%粗蛋白水平组分别上升23.00% 、12.00% 、6.00%和48.00%、47.00%、56.00%。结果表明, 14%粗蛋白水平组外源添加合成氨基酸并不能促进氨基酸转运载体增加氨基酸的吸收来满足断奶仔猪的生长性能。然而, 17%粗蛋白水平组可以减少氮排放到环境中,同时又能满足此阶段断奶仔猪的生长发育。因此, 17%粗蛋白水平组对这个阶段断奶仔猪最合适。
Starting Page	496
Ending Page	502
Page Count	7
File Format	PDF
ISSN	16731581
Journal	Journal of Zhejiang University SCIENCE B
Volume Number	16
Issue Number	6
e-ISSN	18621783
Language	Chinese
Publisher	Zhejiang University Press
Publisher Date	2015-04-16
Publisher Place	Hangzhou
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Crude protein Amino acid balance Amino acid transporters Biomedicine general
Content Type	Text
Resource Type	Article
Subject	Veterinary Medicine Biochemistry, Genetics and Molecular Biology Pharmacology, Toxicology and Pharmaceutics

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