Resistin-like molecule alpha enhances myeloid cell activation and promotes colitis.

Resistin-like molecule alpha enhances myeloid cell activation and promotes colitis.
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DOI:
10.1016/j.jaci.2008.10.017
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发表时间:
2008-12
影响因子:
14.2
通讯作者:
Rothenberg, Marc E.
Rothenberg, Marc E.
中科院分区:
医学1区
文献类型:
--
作者:
Munitz, Ariel;Waddell, Amanda;Seidu, Luqman;Ahrens, Richard;Hogan, Simon P.;Rothenberg, Marc E.

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抵抗素样分子 (Relm) α 是一种分泌蛋白,也是替代激活巨噬细胞的标志基因。 Relm-α 高度受过敏性炎症触发因素诱导,并被认为可以促进组织修复。然而 Relm-α 的功能仍然未知。我们试图确定 Relm-α 在葡聚糖硫酸钠 (DSS) 诱导的结肠损伤中的作用。 Relm-α 的细胞来源是在口服 DSS 诱导结肠炎后确定的。生成 Retnla−/− 小鼠,接受 DSS 治疗,并监测疾病进展(临床和组织病理学特征)。评估了离体结肠培养物的上清液以及与 Relm-α 一起孵育的 LPS 刺激的巨噬细胞的细胞因子产生。腹膜内施用 Relm-α,并评估腹膜的细胞募集。在用 DSS 进行先天性肠道刺激后,Relm-α 在嗜酸性粒细胞和上皮细胞中高度表达。 Retnla 基因靶向小鼠免受 DSS 诱导的结肠炎(例如腹泻减少、直肠出血、结肠缩短、疾病评分和组织病理学变化)。 Relm-α 共同激活 IL-6 和 TNF-α 的释放,并抑制 LPS 激活的骨髓源性巨噬细胞释放 IL-10。与这些发现一致,经 DSS 处理的 Retnla−/− 小鼠的结肠培养物离体产生的 IL-6 减少,IL-10 增加。此外,Retnla−/− 小鼠体内 c-Jun N 末端激酶磷酸化显着降低。 Relm-α 的体内给药引发细胞向腹膜的募集,并且 Relm-α 能够在体外诱导嗜酸性粒细胞趋化性。这些发现证明了 Relm-α 在结肠先天免疫反应中的核心促炎作用,确定了调节巨噬细胞激活的新途径。
Resistin-like molecule (Relm) α is a secreted protein and a hallmark signature gene for alternatively activated macrophages. Relm-α is highly induced by allergic inflammatory triggers and perceived to promote tissue repair. Yet the function of Relm-α remains unknown. We sough to determine the role of Relm-α in dextran sodium sulfate (DSS)–induced colonic injury. The cellular source of Relm-α was determined after oral DSS-induced colitis. Retnla−/− mice were generated, subjected to DSS treatment, and monitored for disease progression (clinical and histopathologic features). Cytokine production in the supernatants of ex vivo colon cultures, and of LPS-stimulated macrophages incubated with Relm-α was assessed. Relm-α was administered intraperitoneally, and the cellular recruitment to the peritoneum was assessed. After innate intestinal stimulation with DSS, Relm-α was highly expressed by eosinophils and epithelial cells. Retnla gene–targeted mice were protected from DSS-induced colitis (eg, decreased diarrhea, rectal bleeding, colon shortening, disease score, and histopathologic changes). Relm-α coactivated IL-6 and TNF-α release and inhibited IL-10 release from LPS-activated bone marrow–derived macrophages. Consistent with these finding, colon cultures of DSS-treated Retnla−/− mice produced decreased IL-6 and increased IL-10 ex vivo. Furthermore, Retnla−/− mice had substantially decreased c-Jun N-terminal kinase phosphorylation in vivo. In vivo administration of Relm-α initiated cellular recruitment to the peritoneum, and Relm-α was able to induce eosinophil chemotaxis in vitro. These findings demonstrate a central proinflammatory role for Relm-α in colonic innate immune responses, identifying a novel pathway for regulation of macrophage activation.
DOI: 10.1084/jem.155.5.1291
发表时间: 1982-05-01
期刊: The Journal of experimental medicine
影响因子: --
作者:
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发表时间: 2006-08-01
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DOI: 10.1074/jbc.272.12.7617
发表时间: 1997-03-21
影响因子: 4.8
作者:
vanderVliet, A;Eiserich, JP;Cross, CE
通讯作者: Cross, CE
DOI: 10.1016/j.jaci.2006.04.039
发表时间: 2006-07-01
影响因子: 14.2
作者:
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通讯作者: Rothenberg, Marc E.