Interleukin-23-Independent IL-17 Production Regulates Intestinal Epithelial Permeability.

Interleukin-23-Independent IL-17 Production Regulates Intestinal Epithelial Permeability.
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DOI:
10.1016/j.immuni.2015.09.003
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发表时间:
2015-10-20
期刊:
影响因子:
32.4
通讯作者:
Cua DJ
Cua DJ
中科院分区:
医学1区
文献类型:
--
作者:
Lee JS;Tato CM;Joyce-Shaikh B;Gulen MF;Cayatte C;Chen Y;Blumenschein WM;Judo M;Ayanoglu G;McClanahan TK;Li X;Cua DJ

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IL-17A 在肠道粘膜中是否具有致病和/或保护作用尚存在争议,并且很少有研究分析特定细胞群在发炎结肠组织内的保护功能。在这里,我们提供了上皮损伤期间紧密连接蛋白occludin的IL-17A依赖性调节的证据,其限制了过度通透性并维持屏障完整性。对上皮细胞的分析表明,在 Act-1 信号传导缺失的情况下,IL-17A 的保护作用被消除,炎症增强。我们证明,急性肠道损伤后,结肠固有层中的 IL-23R+ RORγt+ γδ T 细胞是早期肠道保护性 IL-17A 的主要产生者,优于其他细胞群(例如记忆 Th17 细胞和 ILC3)。 IL-17A 的产生不依赖于 IL-23,从而在没有 IL-23 的情况下保持保护性 IL-17 完整。这些结果表明,产生 IL-17 的常驻 γδ T 细胞对于维持和保护肠粘膜上皮屏障很重要。
Whether IL-17A has pathogenic and/or protective roles in the gut mucosa is controversial and few studies have analyzed specific cell populations for protective functions within the inflamed colonic tissue. Here we provide evidence for IL-17A dependent regulation of the tight junction protein occludin during epithelial injury that limits excessive permeability and maintains barrier integrity. Analysis of epithelial cells showed that in the absence of Act-1 signaling, the protective effect of IL-17A was abrogated and inflammation was enhanced. We demonstrate that following acute intestinal injury, IL-23R+ RORγt+ γδ T cells in the colonic lamina propria are the primary producers of early, gut-protective IL-17A, over other cell populations such as memory Th17 cells and ILC3. This production of IL-17A was IL-23 independent, leaving protective IL-17 intact in the absence of IL-23. These results suggest that IL-17 producing resident γδ T cells are important for the maintenance, and protectionof epithelial barriers in the intestinal mucosa.
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