Intestinal epithelial cell secretion of RELM-beta protects against gastrointestinal worm infection.

Intestinal epithelial cell secretion of RELM-beta protects against gastrointestinal worm infection.
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DOI:
10.1084/jem.20091268
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发表时间:
2009-12-21
期刊:
The Journal of experimental medicine
影响因子:
--
通讯作者:
Finkelman FD
Finkelman FD
中科院分区:
其他
文献类型:
--
作者:
Herbert DR;Yang JQ;Hogan SP;Groschwitz K;Khodoun M;Munitz A;Orekov T;Perkins C;Wang Q;Brombacher F;Urban JF Jr;Rothenberg ME;Finkelman FD

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Th2细胞驱动针对大多数寄生蠕虫的保护性免疫,但促进病原体清除的机制鲜有得到证实。我们发现,白细胞介素 - 4(IL - 4)和白细胞介素 - 13(IL - 13)主要通过诱导肠上皮细胞(IECs)分化为分泌抵抗素样分子(RELM)β的杯状细胞来防御肠道腔内的蠕虫。RELM - β对于巴西日圆线虫和多形螺旋线虫的正常自发排出以及白细胞介素 - 4诱导的排出是必不可少的,这两种线虫都生活在肠道腔内,但它对针对生活在肠上皮细胞内的旋毛虫的免疫没有作用。RELM - β在体外对多形螺旋线虫无毒性,但在感染期间直接抑制蠕虫以宿主组织为食的能力。这降低了多形螺旋线虫的三磷酸腺苷含量和繁殖力。重要的是,RELM - β驱动的免疫不需要T细胞或B细胞、替代性巨噬细胞激活或肠道通透性增加。因此,我们展示了一种在黏膜界面的宿主保护新机制,解释了白细胞介素 - 4和白细胞介素 - 13对上皮细胞的刺激如何有助于防御生活在肠道腔内的寄生蠕虫。
Th2 cells drive protective immunity against most parasitic helminths, but few mechanisms have been demonstrated that facilitate pathogen clearance. We show that IL-4 and IL-13 protect against intestinal lumen-dwelling worms primarily by inducing intestinal epithelial cells (IECs) to differentiate into goblet cells that secrete resistin-like molecule (RELM) β. RELM-β is essential for normal spontaneous expulsion and IL-4–induced expulsion of Nippostrongylus brasiliensis and Heligmosomoides polygyrus, which both live in the intestinal lumen, but it does not contribute to immunity against Trichinella spiralis, which lives within IEC. RELM-β is nontoxic for H. polygyrus in vitro but directly inhibits the ability of worms to feed on host tissues during infection. This decreases H. polygyrus adenosine triphosphate content and fecundity. Importantly, RELM-β–driven immunity does not require T or B cells, alternative macrophage activation, or increased gut permeability. Thus, we demonstrate a novel mechanism for host protection at the mucosal interface that explains how stimulation of epithelial cells by IL-4 and IL-13 contributes to protection against parasitic helminthes that dwell in the intestinal lumen.
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