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Effects of antimicrobial peptide cathelicidin-BF on diarrhea controlling, immune responses, intestinal inflammation and intestinal barrier function in piglets with postweaning diarrhea

文献类型： 外文期刊

作者： Feng, Junsen 1 ; Wang, Li 2 ; Xie, Yongsheng 1 ; Chen, Yibo 1 ; Yi, Hongbo 2 ; He, Dongsheng 1 ;

作者机构： 1.South China Agr Univ, Coll Vet Med, Wushan Rd, Guangzhou 510642, Peoples R China

2.Guangdong Acad Agr Sci, Minist Agr & Rural Affairs, State Key Lab Livestock Mid Poultry Breeding,Inst, Key Lab Anim Nutr & Feed Sci South China,Guangdon, Guangzhou 510640, Peoples R China

关键词： Cathelicidin-BF; Weaned piglet; Diarrhea; Intestinal inflammation; Intestinal barrier function

期刊名称：INTERNATIONAL IMMUNOPHARMACOLOGY （ 影响因子：4.932； 五年影响因子：4.624 ）

ISSN： 1567-5769

年卷期： 2020 年 85 卷

页码：

收录情况： SCI

摘要： The objective was to evaluate the effects of antimicrobial peptide cathelicidin-BF (C-BF) treatment on diarrhea controlling, immune responses, intestinal inflammation, and intestinal barrier function in piglets with postweaning diarrhea. In this study, fifty-four weaned piglets with diarrhea were selected and treated with saline (control), C-BF or norfloxacin nicotinic (NFN) for 7 days. Here, we investigated the effects of C-BF on diarrhea controlling, growth performance, serum immune indicators, intestinal morphology, intestinal inflammation, and intestinal epithelial barrier function in the weaned piglets with diarrhea. The results showed that C-BF treatment decreased (P < 0.05) diarrheal index and increased (P < 0.05) average daily gain (ADG) and average daily feed intake (ADFI) compared with control group. C-BF treatment decreased (P < 0.05) levels of serum blood urea nitrogen (BUN) and aspartate aminotransferase (AST), but increased (P < 0.05) levels of serum A/G and alkaline phosphatase (ALP) compared with control group. The concentrations of IL-6, IL-8, tumor necrosis factor-alpha (TNF-alpha), and IgG were lower (P < 0.05), but IgA was greater (P < 0.05) for piglets treated by C-BF compared with those in control group. C-BF and NFN treatment decreased (P < 0.05) IL-6, IL-8, IL-22, IL-10 and transforming growth factor-beta (TGF-beta) production in the jejunum and ileum compared with the control group. C-BF treatment increased the expression levels of zonula occluden-1 (ZO-1), Occludin, and Claudin-1 in the jejunum and colon compared with the control group and the NFN group. In conclusion, these data indicate that C-BF treatment may be an effective therapeutic strategy for controlling post-weaning diarrhea, improving immune responses, attenuating intestinal inflammation and enhancing intestinal barrier function in piglets with postweaning diarrhea.

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