A common inhibitory receptor for major histocompatibility complex class I molecules on human lymphoid and myelomonocytic cells.

A common inhibitory receptor for major histocompatibility complex class I molecules on human lymphoid and myelomonocytic cells.
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DOI:
10.1084/jem.186.11.1809
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发表时间:
1997-12-01
期刊:
The Journal of experimental medicine
影响因子:
--
通讯作者:
López-Botet M
López-Botet M
中科院分区:
其他
文献类型:
--
作者:
Colonna M;Navarro F;Bellón T;Llano M;García P;Samaridis J;Angman L;Cella M;López-Botet M

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自然杀伤(NK)细胞介导的裂解是负调控的杀伤细胞抑制受体特异性的主要组织相容性复合体(MHC)I类分子。在这项研究中,我们描述了一种新的免疫球蛋白超家族的抑制性MHC I类受体,不仅由NK细胞和T细胞亚群表达,而且由B细胞、单核细胞、巨噬细胞和树突状细胞表达。这种受体称为Ig样转录物(ILT)2,结合MHC I类分子并递送抑制NK和T细胞杀伤的负信号,以及分别通过B细胞抗原受体和人组织相容性白细胞抗原(HLA)-DR触发的B细胞和骨髓单核细胞中的Ca 2+动员。此外,骨髓单核细胞表达与ILT 2同源的受体,其特征在于广泛的多态性,并可能识别不同的HLA I类分子。这些结果表明,不同的白细胞谱系已通过识别自身的MHC I类分子作为一种常见的策略,以控制细胞活化过程中的免疫反应。
Natural killer (NK) cell–mediated lysis is negatively regulated by killer cell inhibitory receptors specific for major histocompatibility complex (MHC) class I molecules. In this study, we characterize a novel inhibitory MHC class I receptor of the immunoglobulin-superfamily, expressed not only by subsets of NK and T cells, but also by B cells, monocytes, macrophages, and dendritic cells. This receptor, called Ig-like transcript (ILT)2, binds MHC class I molecules and delivers a negative signal that inhibits killing by NK and T cells, as well as Ca2+ mobilization in B cells and myelomonocytic cells triggered through the B cell antigen receptor and human histocompatibility leukocyte antigens (HLA)–DR, respectively. In addition, myelomonocytic cells express receptors homologous to ILT2, which are characterized by extensive polymorphism and might recognize distinct HLA class I molecules. These results suggest that diverse leukocyte lineages have adopted recognition of self–MHC class I molecules as a common strategy to control cellular activation during an immune response.
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