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Effects of altering the ratio of c16:0 and cis-9 c18:1 in rumen bypass fat on growth performance, lipid metabolism, intestinal barrier, cecal microbiota, and inflammation in fattening bulls

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Journal of Animal Science and Biotechnology 2024年第5期15卷 2156-2174页

作者： Haixin Bai Haosheng Zhang congwen Wang Modinat Tolani Lambo Yang Li Yonggen Zhang college of Animal Science and Technology Northeast Agricultural UniversityHarbin 150030China Faculty of Animal Science and Technology Yunnan Agricultural UniversityKunming 650500China

Background c16:0 and cis-9 c18:1 may have different effects on animal growth and health due to unique metabolism in *** study was investigated to explore the different effects of altering the ratio of c16:0 and cis-9 c18:1 in fat supplements on growth performance,lipid metabolism,intestinal barrier,cecal microbiota,and inflammation in fattening *** finishing Angus bulls(626±69 kg,21±0.5 months)were divided into 3 treatments according to the randomized block design:(1)control diet without additional fat(cON),(2)cON+2.5%palmitic acid calcium salt(PA,90%c16:0),and(3)cON+2.5%mixed fatty acid calcium salt(MA,60%c16:0+30%cis-9 c18:1).The experiment lasted for 104 d,after which all the bulls were slaughtered and sampled for *** MA tended to reduce 0–52 d dry matter intake compared to PA(DMI,P=0.052).compared with cON and MA,PA significantly increased 0–52 d average daily gain(ADG,P=0.027).PA tended to improve the 0–52 d feed conversion rate compared with cON(FcR,P=0.088).Both PA and MA had no significant effect on 52–104 days of DMI,ADG and FcR(P>0.05).PA tended to improve plasma triglycerides compared with MA(P=0.077),significantly increased plasma cholesterol(P=0.002)and tended to improve subcutaneous adipose weight(P=0.066)when compared with cON and *** PA and MA increased visceral adipose weight compared with cON(P=0.021).Only PA increased the colonization of Rikenellaceae,Ruminococcus and Proteobacteria in the cecum,and MA increased Akkermansia abundance(Pcompared with cON,both PA and MA down-regulated the m RNA expression of claudin-1 in the jejunum(Pcreased plasma diamine oxidase(DAO,Pccharide(LPS,P=0.045).compared with cON and MA,PA down-regulated the ZO-1 in the jejunum(Pcreased plasma LPS-binding protein(LBP,Pcompared with cON,only PA down-regulated the Occludin in the jejunum(P=0.013).compared with cON,PA and MA significantly up-regulated the expression of TLR-4 and NF-κB

关键词： c16:0 cis-9 c18:1 Finishing bulls Intestinal homeostasis Lipid metabolism Low-grade inflammation

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