Propionate stimulates the secretion of satiety hormones and reduces acute appetite in a cecal fistula pig model  

作　　者：Yanan Zhang Xuan Li Guowen Huang Haifeng Wang Huizi Chen Yong Su Kaifan Yu Weiyun Zhu 

机构地区：[1]Laboratory of Gastrointestinal Microbiology,Jiangsu Key Laboratory of Gastrointestinal Nutrition and Animal Health,College of Animal Science and Technology,Nanjing Agricultural University,Nanjing,210095,China [2]National Center for International Research on Animal Gut Nutrition,Nanjing Agricultural University,Nanjing,210095,China [3]Changjia(Shanghai)Agricultural Technology Co.,Ltd.,Shanghai,201414,China

出　　处：《Animal Nutrition》2022年第3期390-398,共9页动物营养（英文版）

基　　金：the National Natural Science Foundation of China(31972528 and 31501962);the Jiangsu Agricultural Science and Technology Innovation Fund(CX(19)3012).

摘　　要：Short-chain fatty acids(SCFA)can regulate appetite by stimulating the secretion of satiety hormones.However,the impact of short-chain fatty acid propionate on the release of gut satiety hormones and appetite regulation in pigs is not completely understood.In this study,16 pigs were infused with saline or sodium propionate through a fistula in the caecum during a 28-day experimental period.We characterized the effects of propionate administration on peptide YY(PYY)and glucagon-like peptide 1(GLP-1)secretion from colonic tissue,and investigated the role of propionate infusion on the expression of appetite-related genes in the colon and hypothalamus.Further,the direct impact of propionate administration on the expression of orexigenic neuropeptide agouti-related protein(AgRP)in hypothalamic N38 cells was also examined.The results showed that intra-cecal infusion of propionate reduced the short-term feed intake(P<0.05)but not the long-term feed intake in pigs(P>0.05).Propionate administration stimulated PYY and GLP-1 release from colon tissue in vivo and ex vivo(P<0.05).It also upregulated PYY expression in the colonic mucosa(P<0.05).Meanwhile,the GLP-1 and PYY levels in the blood were increased after intra-cecal infusion of propionate at d 28(P<0.05).Additionally,intra-cecal infusion of propionate upregulated the mRNA and protein expression of free fatty acid receptor 2/3(FFAR2/FFAR3)in the colonic mucosa(P<0.05).Propionate infusion also downregulated the orexigenic AgRP mRNA expression(P<0.05)and upregulated the anorexigenic cocaine-and amphetamine-regulated transcript(CART)mRNA expression(P=0.09)in the hypothalamus.Moreover,propionate administration directly downregulated AgRP expression in hypothalamic N38 cells in a dose-dependent manner(P<0.05).Collectively,these findings demonstrated that cecal propionate stimulated colonic secretion of satiety hormones and suppressed appetite to reduce the short-term feed intake in pigs.This study highlights that microbial-derived propionate exerts an important role in regula

关 键 词：PROPIONATE Gut hormones APPETITE HYPOTHALAMUS Pig 

分 类 号：S816[农业科学—饲料科学]