The leukocyte integrin antagonist Del-1 inhibits IL-17-mediated inflammatory bone loss.

The leukocyte integrin antagonist Del-1 inhibits IL-17-mediated inflammatory bone loss.
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DOI:
10.1038/ni.2260
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发表时间:
2012-03-25
期刊:
影响因子:
30.5
通讯作者:
--
中科院分区:
医学1区
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衰老与对慢性炎症性疾病易感性增加有关,其中包括牙周炎在内的几种疾病涉及中性粒细胞介导的组织损伤。在此,我们发现与衰老相关的牙周炎伴随着Del - 1(EDIL3,一种LFA - 1整合素依赖性中性粒细胞黏附的内源性抑制剂)表达降低,以及白细胞介素 - 17(IL - 17)表达相应增加。一致地,IL - 17抑制牙龈内皮细胞Del - 1的表达,从而促进LFA - 1依赖性中性粒细胞募集。年轻的Del - 1缺陷小鼠会发生自发性牙周炎,其特征为中性粒细胞过度浸润和IL - 17表达;在Del - 1 - LFA - 1和Del - 1 - IL - 17受体双缺陷小鼠中疾病得以预防。局部施用Del - 1可抑制IL - 17产生、中性粒细胞积聚和骨质流失。因此,Del - 1抑制LFA - 1依赖性中性粒细胞募集和IL - 17触发的炎症病理,可能因此成为炎症性疾病一种有前景的治疗方法。
Aging is linked to increased susceptibility to chronic inflammatory diseases several of which, including periodontitis, involve neutrophil-mediated tissue injury. Here, we found that aging-associated periodontitis was accompanied by diminished expression of Del-1 (EDIL3), an endogenous inhibitor of LFA-1 integrin-dependent neutrophil adhesion, and by a reciprocal increase in IL-17 expression. Consistently, IL-17 inhibited gingival endothelial cell expression of Del-1, thereby promoting LFA-1-dependent neutrophil recruitment. Young Del-1-deficient mice developed spontaneous periodontitis featuring excessive neutrophil infiltration and IL-17 expression; disease was prevented in Del-1–LFA-1 and Del-1–IL-17 receptor double-deficient mice. Locally administered Del-1 inhibited IL-17 production, neutrophil accumulation, and bone loss. Therefore, Del-1 suppresses LFA-1-dependent neutrophil recruitment and IL-17-triggered inflammatory pathology and may thus be a promising therapeutic for inflammatory diseases.
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