HLA-F and MHC class I open conformers are ligands for NK cell Ig-like receptors.

HLA-F and MHC class I open conformers are ligands for NK cell Ig-like receptors.
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DOI:
10.4049/jimmunol.1300081
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发表时间:
2013-10-01
期刊:
Journal of immunology (Baltimore, Md. : 1950)
影响因子:
--
通讯作者:
Geraghty DE
Geraghty DE
中科院分区:
其他
文献类型:
--
作者:
Goodridge JP;Burian A;Lee N;Geraghty DE

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杀伤性免疫球蛋白样受体 (KIR) 是由 NK 和 T 细胞表达的先天免疫受体,通常与通过丢失各自的 MHC 配体来检测缺失自身相关。等位基因经典 I 类 MHC (MHC-I) 的一些 KIR 特异性已被描述,而其他 KIR 受体-配体关系,包括与非经典 MHC-I 相关的关系,尚未明确定义。我们在此报告,KIR3DL2 和 KIR2DS4 以及以不含肽的游离形式表达的非经典抗原 HLA-F 在物理和功能上相互作用。这些相互作用扩展到包括经典 MHC I 类开放构象异构体作为配体,定义了 KIR 受体和 I 类 MHC 之间的新关系。这些数据总体表明 MHC-I 开放构象异构体(包括原型 HLA-F)和 KIR 受体之间存在更广泛的、以前未被认识的相互作用,以炎症反应为中心发挥免疫调节作用。
Killer Immunoglobulin-like receptors (KIR) are innate immune receptors expressed by NK and T cells classically associated with the detection of missing-self through loss of their respective MHC ligand. Some KIR specificities for allelic classical class I MHC (MHC-I) have been described, while other KIR receptor-ligand relationships, including those associated with non-classical MHC-I, have yet to be clearly defined. We report here that KIR3DL2 and KIR2DS4 and the non-classical antigen HLA-F, expressed as a free form devoid of peptide, physically and functionally interact. These interactions extend to include classical MHC class I open conformers as ligands, defining new relationships between KIR receptors and class I MHC. The data collectively suggest a broader, previously unrecognized interaction between MHC-I open conformers – including prototypical HLA-F – and KIR receptors, acting in an immunoregulatory capacity centered on the inflammatory response.
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