Effects of acute heat stress on intestinal microbiota in grow-finishing pigs, and associations with feed intake and serum profile
文献类型： 外文期刊
作者： Xiong, Y. 1 ; Yi, H. 1 ; Wu, Q. 1 ; Jiang, Z. 1 ; Wang, L. 1 ;
作者机构： 1.Guangdong Acad Agr Sci, Key Lab Anim Nutr & Feed Sci South China,State Ke, Guangdong Publ Lab Anim Breeding & Nutr,Minist Ag, Guangdong Key Lab Anim Breeding & Nutr,Inst Anim, Guangzhou, Guangdong, Peoples R China
关键词： acute heat stress; grow-finishing pigs; intestinal microbiota; serum profile; short chain fatty acids
期刊名称：JOURNAL OF APPLIED MICROBIOLOGY （ 影响因子：3.772； 五年影响因子：3.963 ）
ISSN： 1364-5072
年卷期： 2020 年 128 卷 3 期
页码：
收录情况： SCI
摘要： Aims This study was conducted to assess the effects of acute heat stress (HS) on intestinal microbiota, and the associations with the changes in feed intake (FI) and serum profile. Methods and Results Twenty four individually housed pigs (Duroc x Large White x Landrace, 30 +/- 1 kg body weight) were randomly assigned to receive one of three treatments (8 pigs/treatment): (i) thermal neutral (TN) conditions (25 +/- 1 degrees C), (ii) HS conditions (35 +/- 1 degrees C), (iii) pair-feeding (PF) with HS under TN conditions. After 24-h treatment, pigs were monitored to assess FI, and samples of serum and faeces were collected to investigate serum profile, microbial composition and short chain fatty acids (SCFAs). The results showed that HS decreased (P < 0 center dot 05) FI compared with the TN group. Compared with TN group, HS changed the serum profile by affecting biochemical parameters and hormones related with energy metabolism and stress response; immune indicators were also altered in HS group. Most of changes in serum profile were independent of FI reduction. Additionally, HS shifted the diversity and composition of faecal microbial community by increasing (P < 0 center dot 05) Proteobacteria and decreasing (P < 0 center dot 05) Bacteroidetes. Moreover, HS decreased (P < 0 center dot 05) the concentrations of propionate, butyrate, valerate, iso-valerate and total SCFAs in faeces in an FI-independent manner. Furthermore, the Spearman correlation analysis implied that changes of serum profile have potential correlation with alterations of faecal microbiota and their SCFAs metabolites in acute HS-treated grow-finishing pigs. Conclusions Metabolism disorders caused by 24-h acute HS associated with changes of faecal microbiota and their SCFAs metabolites in an FI-independent manner in grow-finishing pigs. Significance and Impact of the Study These results give us a new insight of the intestinal damage caused by acute HS and the underlying mechanisms.
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