Vancomycin-resistant enterococci exploit antibiotic-induced innate immune deficits.

Vancomycin-resistant enterococci exploit antibiotic-induced innate immune deficits.
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DOI:
10.1038/nature07250
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发表时间:
2008-10-09
期刊:
影响因子:
64.8
通讯作者:
Pamer, Eric G.
Pamer, Eric G.
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Brandl, Katharina;Plitas, George;Mihu, Coralia N.;Ubeda, Carles;Jia, Ting;Fleisher, Martin;Schnabl, Bernd;DeMatteo, Ronald P.;Pamer, Eric G.

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Infection with antibiotic-resistant bacteria, such as vancomycin-resistant Enterococcus (VRE), is a dangerous and costly complication of broad-spectrum antibiotic therapy. How antibiotic-mediated elimination of commensal bacteria promotes infection by antibiotic-resistant bacteria is a fertile area for speculation with few defined mechanisms. Here we demonstrate that antibiotic treatment of mice notably downregulates intestinal expression of RegIIIγ (also known as Reg3g), a secreted C-type lectin that kills Gram-positive bacteria, including VRE. Downregulation of RegIIIγ markedly decreases in vivo killing of VRE in the intestine of antibiotic-treated mice. Stimulation of intestinal Toll-like receptor 4 by oral administration of lipopolysaccharide re-induces RegIIIγ, thereby boosting innate immune resistance of antibiotic-treated mice against VRE. Compromised mucosal innate immune defence, as induced by broad-spectrum antibiotic therapy, can be corrected by selectively stimulating mucosal epithelial Toll-like receptors, providing a potential therapeutic approach to reduce colonization and infection by antibiotic-resistant microbes.
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发表时间: 2005-01-04
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影响因子: 64.8
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