首页> 外文期刊>American Journal of Physiology >Current concepts in mucosal immunity. II. One size fits all: nonclassical MHC molecules fulfill multiple roles in epithelial cell function.
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Current concepts in mucosal immunity. II. One size fits all: nonclassical MHC molecules fulfill multiple roles in epithelial cell function.

机译:粘膜免疫的最新概念。二。一种尺寸适合所有人:非经典MHC分子在上皮细胞功能中发挥多种作用。

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摘要

The human major histocompatibility complex (MHC) on chromosome 6 encodes three classical class I genes: human leukocyte antigen-A (HLA-A), HLA-B, and HLA-C. These polymorphic genes encode a 43- to 45-kDa cell surface glycoprotein that, in association with the 12-kDa beta 2-microglobulin molecule, functions in the presentation of nine amino acid peptides to the T cell receptor of CD8-bearing T lymphocytes and killer inhibitory receptors on natural killer cells. In addition to these ubiquitously expressed polymorphic proteins, the human genome also encodes a number of nonclassical MHC class I-like, or class Ib, genes that in general encode nonpolymorphic molecules involved in a variety of specific immunologic functions. Many of these genes, including CD1, the neonatal Fc receptor for immunoglobulin G, HLA-G, the MHC class I chain-related gene A, and Hfe, are prominently displayed on epithelial cells, suggesting an important role in epithelial cell biology.
机译:6号染色体上的人类主要组织相容性复合体(MHC)编码三个经典的I类基因:人类白细胞抗原-A(HLA-A),HLA-B和HLA-C。这些多态性基因编码一个43至45 kDa的细胞表面糖蛋白,该蛋白与12 kDaβ2-微球蛋白分子结合,在向CD8携带T淋巴细胞的T细胞受体的九种氨基酸肽呈递中起作用。自然杀伤细胞上的杀伤抑制受体。除了这些遍在表达的多态性蛋白外,人类基因组还编码许多非经典的MHC I类或Ib类基因,这些基因通常编码参与多种特定免疫功能的非多态性分子。这些基因中的许多,包括CD1,免疫球蛋白G的新生Fc受体,HLA-G,MHC I类链相关基因A和Hfe,都在上皮细胞上突出显示,表明在上皮细胞生物学中具有重要作用。

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