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In pigs, the alpha-(1,2) fucosyltransferase ( FUT1 ) gene has been highlighted for its properties in controlling the intestinal expression of enterotoxigenic  E .  coli  (ETEC) F18 receptors; a pathogen causing edema disease and post-weaning diarrhoea. In this study, we hypothesized that pigs with different genotypes (ETEC F18 resistant ( FUT1  AA ) versus susceptible ( FUT1  AG )) differed in following systemic and enteric responses: growth performance, plasma metabolic profiles, expression of candidate genes for intestinal mucosal homeostasis and immunity, number of selected bacteria and the concentration of short-chain fatty acids (SCFA) in faeces and digesta in piglets pre and post-weaning, and on the ETEC F18 adherence ex vivo. Genotype had the strongest impact on plasma metabolomic profile on day 7 and 28 of age.  FUT1  AG  piglets had higher level of N-methyl-2-pyrrolidinone, hippuric acid, oxindole, and 3-oxo-5-beta-chol-7-en-24-oic acid on day 7, and a higher level of guanosine on day 28 than that in the  FUT1  AA  piglets.  FUT1  AA  piglets had a higher level of betaine on day 7 and 3-methylguanine on day 28. On day 34 of age, the  FUT1  AA  pigs had higher levels of S-2-hydroxyglutarate, L-phenylalanine, tauroursodeoxycholic acid and an undetermined PC/LysoPC, while Ile Glu Phe Gly peptide and genistein 5-O-glucuronide, and PC (18:0/0:0) were at higher levels in the  FUT1  AG  piglets.  FUT1  genotype did not affect the growth performance and expression of candidate genes.  FUT1  AG  piglets had a higher number of haemolytic bacteria in faeces and in digesta than that in  FUT1  AA  at 34 days of age. The colonic acetic acid concentration was highest in  FUT1  AG  piglets.  FUT1  genotype may influence not only the expression of  E .  coli  F18 receptors but could potentially impact the gut homeostasis and metabotype of piglets pre and post-weaning. Further investigations on the relation between  FUT1  genotype and these aspects including the intestinal commensal microbiota will expand the knowledge on factors affecting the intestinal ecosystem.

plos one

Effects of alpha-(1,2)-fucosyltransferase genotype variants on plasma metabolome, immune responses and gastrointestinal bacterial enumeration of pigs pre- and post-weaning