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Supplementing N-carbamoylglutamate in late gestation increases newborn calf weight by enhanced placental expression of mTOR and angiogenesis factor genes in dairy cows

引用

Animal Nutrition 2021年第4期7卷 981-988页

作者： Fengfei Gu Luyi Jiang Linyu Xie Diming Wang Fengqi Zhao Jianxin Liu Institute of dairy Science College of Animal SciencesZhejiang UniversityHangzhou310058China Department of Animal and Veterinary Sciences University of VermontBurlingtonVT 05405USA

The objective of this study was to investigate whether supplementation with N-carbamoylglutamate(NCG)to cows during late gestation alters uteroplacental tissue nutrient transporters,calf metabolism and newborn *** multiparous Chinese Holstein cows were used in a randomized complete block design *** the last 28 d of pregnancy,cows were fed a diet without(CON)or with NCG(20 g/d per cow).The body weight of calves was weighed immediately after *** samples were collected at parturition and used to assess mRNA expression of genes involved in transport of arginine,glucose,fatty acid and angiogenesis factors,as well as the mammalian target of rapamycin(mTOR)*** samples of calves before colostrum consumption were also collected for the detection of plasma parameters,amino acids(AA)and metabolomics *** newborn weight(P=0.02)and plasma Arg concentration of NCG-calves was significantly higher(P=0.05)than that of CON-calves,and the plasma concentrations of urea nitrogen tended to be lower(P=0.10)in the NCG *** mRNA abundance of genes involved in glucose transport(solute carrier family 2 member 3[SLC2 A3],Pcows compared to non-supplemented cows,and these metabolites are mainly involved in arginine and proline metabolism,alanine,aspartate and glutamate metabolism,and citrate *** summary,the increased body weight of newborn calves from the NCG supplemented dairy cows maybe attributed to the increased angiogenesis and uteroplacental nutrient transport and to the activated mTOR signal pathway,which may result in the increa

关键词： N-Carbamoylglutamate Metabolomics Newborn calf weight Nutrient transporter Placentome transition dairy cows

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