Dietary adenosine supplementation improves placental angiogenesis in IUGR piglets by up-regulating adenosine A2a receptor  

作　　者：Zifang Wu Jiawei Nie Deyuan Wu Shuangbo Huang Jianzhao Chen Huajin Liang Xiangyu Hao Li Feng Hefeng Luo Chengquan Tan 

机构地区：[1]Guangdong Provincial Key Laboratory of Animal Nutrition Control,National Engineering Research Center for Breeding Swine Industry,Institute of Subtropical Animal Nutrition and Feed,College of Animal Science,South China Agricultural University,Guangzhou,Guangdong 510642,China [2]Dekon Food and Agriculture Group,Chengdu,China

出　　处：《Animal Nutrition》2023年第2期282-288,共7页动物营养（英文版）

基　　金：supported by the National Key R&D Program of China(2021YFD1300401);Natural Science Foundation of Guangdong Province(2021A1515012116).

摘　　要：Abnormal placental angiogenesis is associated with the occurrence of intrauterine growth restriction(IUGR)in piglets,and effective treatment strategies against this occurrence remain to be explored.Adenosine has been reported to play an important role in angiogenesis,but its role in placental angio-genesis is still unknown.Here,we investigated the effect of dietary adenosine supplementation on IUGR occurrence in piglets by analyzing the role of adenosine in placental angiogenesis for Normal and IUGR piglets.Specifically,88 sows were allotted to 2 treatments(n=44)and fed a basal diet supplemented with 0%or 0.1%of adenosine from day 65 of gestation until farrowing,followed by collecting the placental samples of Normal and IUGR piglets,and recording their characteristics.The results showed that adenosine supplementation increased the mean birth weight of piglets(P<0.05)and placental efficiency(P<0.05),while decreasing the IUGR piglet rate(P<0.05).Expectedly,the placenta for IUGR neonates showed a down-regulated vascular density(P<0.05)and angiogenesis as evidenced by the expression level of vascular cell adhesion molecule-1(VCAM1)(P<0.05).Notably,dietary adenosine supplementation promoted angiogenesis(P<0.05)both in the Normal and IUGR placenta.More importantly,the expression level of adenosine A2a receptor(ADORA2A)was lower(P<0.05)in the IUGR placenta than in Normal placenta,whereas adenosine treatment could significantly increase ADORA2A expression,and also had an interaction effect between factors IUGR and Ado.Collectively,placentae for IUGR piglets showed impaired angiogenesis and down-regulated expression level of ADORA2A,while dietary adenosine supplementation could activate ADORA2A expression,improve the placental angio-genesis,and ultimately decrease the occurrence of IUGR in piglets.

关 键 词：ANGIOGENESIS IUGR PLACENTA ADENOSINE ADORA2A 

分 类 号：S828.5[农业科学—畜牧学]