The central role of antigen presentation in islets of Langerhans in autoimmune diabetes.

The central role of antigen presentation in islets of Langerhans in autoimmune diabetes.
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DOI:
10.1016/j.coi.2013.10.011
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发表时间:
2014-02
影响因子:
7
通讯作者:
Unanue ER
Unanue ER
中科院分区:
医学2区
文献类型:
--
作者:
Calderon B;Carrero JA;Unanue ER

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胰岛通常含有常驻抗原呈递细胞(APC),其在正常条件下主要由巨噬细胞和少量树突状细胞(DC)代表。我们在这里介绍这些胰岛APC的特点,指出它们在胰岛内稳态中具有支持功能。胰岛APC在其表面上表达高水平的主要组织相容性复合物(MHC)分子,并且在NOD小鼠的自身免疫性糖尿病中的抗原呈递中高度活跃:它们通过呈递源自β细胞分子的肽来实现这一点。这些APC也有助于将致糖尿病T细胞定位到胰岛中。胰岛APC呈递来源于β细胞分泌颗粒的外源肽,产生独特的肽-MHC复合物(pMHC),其激活绕过胸腺选择的那些非常规T细胞。
The islets of Langerhans normally contain resident antigen presenting cells (APCs), which in normal conditions are mostly represented by macrophages, with a few dendritic cells (DC). We present here the features of these islet APCs, making the point that they have a supportive function in islet homeostasis. Islet APCs express high levels of major histocompatibility complexes (MHC) molecules on their surfaces and are highly active in antigen presentation in the autoimmune diabetes of the NOD mouse: they do this by presenting peptides derived from molecules of the β-cells. These APCs also are instrumental in the localization of diabetogenic T cells into islets. The islet APC present exogenous peptides derived from secretory granules of the beta cell, giving rise to unique peptide-MHC complexes (pMHC) that activate those non-conventional T cells that bypass thymus selection.
通过在胰腺淋巴结中发育调节的胰岛细胞抗原的发育表现来启动自身免疫性糖尿病。
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