Effects of an early lipopolysaccharide challenge on growth and small intestinal structure and function of broiler chickens
文献类型： 外文期刊
作者： Hu, Xiao F. 1 ; Guo, Yu M. 1 ; Li, Jian H. 1 ; Yan, Gui L. 1 ; Bun, Sideoun 1 ; Huang, Bei Y. 1 ;
作者机构： 1.China Agr Univ, Coll Anim Sci & Technol, State Key Lab Anim Nutr, Beijing 100193, Peoples R China
2.Henan Acad Agr Sci, Henan Key Lab Anim Immunol, Zhengzhou 450002, Peoples R China
关键词： Broiler chickens;lipopolysaccharide;small intestinal structure;xylose absorption
期刊名称：CANADIAN JOURNAL OF ANIMAL SCIENCE （ 影响因子：1.015； 五年影响因子：1.094 ）
ISSN： 0008-3984
年卷期： 2011 年 91 卷 3 期
页码：
收录情况： SCI
摘要： Hu, X. F., Guo, Y. M., Li, J. H., Yan, G. L., Bun, S. and Huang, B. Y. 2011. Effects of an early lipopolysaccharide challenge on growth and small intestinal structure and function of broiler chickens. Can. J. Anim. Sci. 91: 379-384. Two experiments were conducted to determine the effect of early exposure to lipopolysaccharide (LPS) on small intestinal structure and function of broiler chickens. Seven-day-old birds were randomly allotted to two equal treatments: an LPS-injected treatment in which the birds were injected intraperitoneally with LPS 500 mu g kg(-1) body weight (dissolved in 1 mL saline) on 8, 10, 12, 15, 17, and 19 d of age, i.e., on days 1, 3, and 5 d for 2 continuous weeks, and a control treatment (CTRL) in which the birds were similarly injected with 1 mL saline as a placebo. In exp. 1, food intake and weight gain were monitored over the 2 wk, the weight of the small bowel was determined at 14 and 21 d of age and duodenal and jejunal villus height and crypt depth, D-xylose uptake were also measured at 21 d. In exp. 2, additional measurements of the intestinal peristalsis ratio and the BrdU-labeling index and duodenal sodium-glucose co-transporter-1 (SGLT1) mRNA level were made at 21 d of age. The results showed that LPS challenge decreased feed intake, daily gain, duodenal and jejunal villus height and crypt depth, plasma D-xylose concentration and intestinal BrdUrd-labeling index, respectively (P<0.05) as well as small bowel weight at 14 and 21 d of age (P<0.05). Conversely, LPS injection increased SGLT1 mRNA level in the small intestine (P<0.05) and the small intestinal relative weight at 14 (P<0.05) and 21 d of age (P=0.063). Following LPS injection there were non-significant changes in feed conversion ratio and intestinal peristalsis ratio (P>0.05). In conclusion, early LPS challenge delayed the growth of intestine and impaired small intestinal structure and absorptive function.
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