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Inhibitory MHC Class I Receptors on Myeloid Cells

机译:髓样细胞上的抑制性MHC I类受体

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Inhibitory MHC class I receptors are mainly expressed on NK cells. NK cells bear various kinds of inhibitorynMHC class I receptors, Killer cell immunoglobulin (Ig)-like receptors, CD94/NKG2A hetrodimer, and murine Ly49 receptornfamily for monitoring the expression of MHC class I on surrounding cells. Leukocyte Ig-like receptors (LILRs),nwhich bind MHC class I molecules, are expressed on other immune cells, such as B cells, macrophages, dendritic cellsn(DCs) and mast cells. A murine LILR relative, paired Ig-like receptor (PIR), which is expressed on B cells and myeloidncells but not on NK and T cells, also recognizes MHC class I molecules as its ligand. Recent studies have revealed thatnsome of these inhibitory receptors associate with MHC class I on the same cell surface (in cis). Moreover, the cisinteractionnhas been verified to regulate effector functions of NK cells or myeloid cells. In this review, we summarize recentndiscoveries on the functions of inhibitory MHC class I receptors, and discuss their regulatory roles in immune responses.
机译:抑制性MHC I类受体主要在NK细胞上表达。 NK细胞带有各种抑制性I类MHC受体,杀伤细胞免疫球蛋白(Ig)样受体,CD94 / NKG2A异二聚体和鼠Ly49受体家族,用于监测MHC I类在周围细胞中的表达。结合I类MHC分子的白细胞Ig样受体(LILRs)在其他免疫细胞上表达,例如B细胞,巨噬细胞,树突状细胞(DC)和肥大细胞。在B细胞和髓样细胞上表达但不在NK和T细胞上表达的鼠类LILR相对配对Ig样受体(PIR)也将MHC I类分子识别为其配体。最近的研究表明,这些抑制性受体中几乎没有与同一细胞表面(顺式)的MHC I类相关。此外,顺式相互作用已被证实可调节NK细胞或髓样细胞的效应子功能。在这篇综述中,我们总结了抑制性MHC I类受体功能的最新发现,并讨论了它们在免疫反应中的调节作用。

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