文献类型： 外文期刊

作者： Guo, Bing-Xiu ¹ ; Wang, Qian-Qian ¹ ; Li, Jia-Hui ¹ ; Gan, Zhen-Shun ¹ ; Zhang, Xiao-Feng ³ ; Wang, Yi-Zhen ¹ ; Du, Hu ¹ ;

作者机构： 1.Zhejiang Univ, Coll Anim Sci, Hangzhou 310058, Zhejiang, Peoples R China

2.Zhejiang Univ, Key Lab Anim Nutr & Feed Sci, Eastern China, Minist Agr, Hangzhou 310058, Zhejiang, Peoples R China

3.Zhejiang Acad Agr Sci, Inst Anim Husb & Vet Sci, Hangzhou 310021, Zhejiang, Peoples R China

关键词： lipocalin 2;siderophore;Escherichia coli K88;iron sequestration;intestinal infection

期刊名称：ONCOTARGET （ 影响因子：5.168； 五年影响因子：5.312 ）

ISSN： 1949-2553

年卷期： 2017 年 8 卷 39 期

页码：

收录情况： SCI

摘要： Iron is an essential nutrient that facilitates cell proliferation and growth, which plays a pivotal role in modulating the battle for survival between mammalian hosts and their pathogens. Pathogenic bacteria secrete siderophores to acquire iron from the host. However, lipocalin 2 (Lcn2), a siderophore-binding antimicrobial protein, binds to siderophores to prevent bacterial uptake of iron, which is critical for the control of systemic infection with Escherichia coli (E. coli). But few studies focus on the anti-infective response of Lcn2 in the intestines by inhibiting bacterial proliferation based on microbial iron metabolism. In this study, we showed that iron was sequestrated within cells in a piglet model of E. coli K88 infection. Siderophores was produced following E. coli K88 infection and siderophore-related genes expression was upregulated in iron-deficiency environment in vitro. Meanwhile, we found that Lcn2 expression was rapidly and robustly induced in jejunum by E. coli K88 infection and could be stimulated by IL-17 and IL-22. Furthermore, both Lcn2 induced in epithelial cells IPEC-1 and added exogenously as a recombinant protein could inhibit the growth of E. coli. We can conclude that Lcn2 is a crucial component of mucosal immune defense against intestinal infection with E. coli K88.