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Low dietary iron intake restrains the intestinal inflammatory response and pathology of enteric infection by food-borne bacterial pathogens.

Abstract：

:Orally administrated iron is suspected to increase susceptibility to enteric infections among children in infection endemic regions. Here we investigated the effect of dietary iron on the pathology and local immune responses in intestinal infection models. Mice were held on iron-deficient, normal iron, or high iron diets and after 2 weeks they were orally challenged with the pathogen Citrobacter rodentium. Microbiome analysis by pyrosequencing revealed profound iron- and infection-induced shifts in microbiota composition. Fecal levels of the innate defensive molecules and markers of inflammation lipocalin-2 and calprotectin were not influenced by dietary iron intervention alone, but were markedly lower in mice on the iron-deficient diet after infection. Next, mice on the iron-deficient diet tended to gain more weight and to have a lower grade of colon pathology. Furthermore, survival of the nematode Caenorhabditis elegans infected with Salmonella enterica serovar Typhimurium was prolonged after iron deprivation. Together, these data show that iron limitation restricts disease pathology upon bacterial infection. However, our data also showed decreased intestinal inflammatory responses of mice fed on high iron diets. Thus additionally, our study indicates that the effects of iron on processes at the intestinal host-pathogen interface may highly depend on host iron status, immune status, and gut microbiota composition.

journal_name

Eur J Immunol

journal_title

European journal of immunology

authors

Kortman GA,Mulder ML,Richters TJ,Shanmugam NK,Trebicka E,Boekhorst J,Timmerman HM,Roelofs R,Wiegerinck ET,Laarakkers CM,Swinkels DW,Bolhuis A,Cherayil BJ,Tjalsma H

doi

10.1002/eji.201545642

subject

Has Abstract

pub_date

2015-09-01 00:00:00

pages

2553-67

issue

9

eissn

0014-2980

issn

1521-4141

journal_volume

45

pub_type

杂志文章

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