Exosome-like nanoparticles from intestinal mucosal cells carry prostaglandin E2 and suppress activation of liver NKT cells.

Exosome-like nanoparticles from intestinal mucosal cells carry prostaglandin E2 and suppress activation of liver NKT cells.
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DOI:
10.4049/jimmunol.1203170
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发表时间:
2013-04-01
期刊:
Journal of immunology (Baltimore, Md. : 1950)
影响因子:
--
通讯作者:
Zhang HG
Zhang HG
中科院分区:
其他
文献类型:
--
作者:
Deng ZB;Zhuang X;Ju S;Xiang X;Mu J;Liu Y;Jiang H;Zhang L;Mobley J;McClain C;Feng W;Grizzle W;Yan J;Miller D;Kronenberg M;Zhang HG

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调节和诱导肝脏自然杀伤T(NKT)细胞的无能可以通过鲜为人知的机制来抑制自身免疫和抗肿瘤反应。我们研究了前列腺素E2(PGE2)对小鼠NKT细胞的影响。前列腺素E2由肠道粘液衍生的外切体样纳米粒(IDEN)传递。在这里,我们证明了IDEN迁移到肝脏,在那里它们诱导NKT细胞无能。这些效应是由IDENs PGE2介导的。阻断PGE_2合成可通过PGE_2EP2/EP4受体介导的方式减弱IDEN对α-GalCer刺激的肝NKT细胞诱生干扰素-CD8和IL-4的抑制作用。促炎条件增加了IDEN向肝脏的迁移,其中α-GalCer和PGE_2在随后的α-GalCer刺激下诱导NKT无能。这些发现表明,携带PGE2的IDEN可以从肠道转移到肝脏,在那里它们作为免疫调节剂,诱导NKT细胞处于无能状态。这些试剂可能成为治疗自身免疫性肝病的药物。
Regulation and induction of anergy in natural killer T (NKT) cells of the liver can inhibit autoimmune and anti-tumor responses by mechanisms that are poorly understood. We investigated the effects of prostaglandin E2 (PGE2), delivered by intestinal, mucus-derived, exosome-like nanoparticles (IDENs), on NKT cells in mice. Here, we demonstrate that IDENs migrate to the liver where they induce NKT cell anergy. These effects were mediated by an IDENs PGE2. Blocking PGE2 synthesis attenuated IDENs inhibition of induction of IFN-γ and IL-4 by α-GalCer stimulated liver NKT cells in a PGE2 EP2/EP4 receptor mediated manner. Pro-inflammatory conditions enhanced the migration of IDENs to the liver where α-GalCer and PGE2 induced NKT anergy in response to subsequent α-GalCer stimulation. These findings demonstrate that IDENs carrying PGE2 can be transferred from the intestine to the liver, where they act as immune modulators, inducing an anergic-like state of NKT cells. These reagents might be developed as therapeutics for autoimmune liver diseases.
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