西北大学生命科学学院功能糖组学实验室,西北大学生命科学学院功能糖组学实验室,西北大学生命科学学院功能糖组学实验室,西北大学生命科学学院功能糖组学实验室,西北大学生命科学学院功能糖组学实验室
国家自然科学基金资助项目(81372365)
Laboratory for Functional Glycomics, College of Life Sciences, Northwest University,Laboratory for Functional Glycomics, College of Life Sciences, Northwest University,Laboratory for Functional Glycomics, College of Life Sciences, Northwest University,Laboratory for Functional Glycomics, College of Life Sciences, Northwest University,Laboratory for Functional Glycomics, College of Life Sciences, Northwest University
This work was supported by a grant from The National Natural Science Foundation of China(81372365)
自然杀伤(NK)细胞是固有免疫系统的重要组成,其作为抵抗病原体和癌变细胞的第一道机体防线,通过释放穿孔素、颗粒酶等介导的细胞毒作用杀伤靶细胞.随着糖组学的飞速发展,大量研究报道糖基化异常往往与细胞的病变相关,这为免疫学研究及疾病的治疗策略提供了全新的研究角度.NK细胞作为固有免疫系统的主要效应细胞之一,其活性及功能受细胞表面糖基化修饰及相关糖结合蛋白(例如siglec、selectin及galectin)的影响较大,siglec通过与肿瘤细胞表面上调的唾液酸化糖链结合以抑制NK细胞活化,selectin与其配体相互作用促进NK细胞的免疫功能,galectin结合β-半乳糖苷介导NK细胞免疫进程.因此,本文从糖组学的角度概述与NK细胞免疫功能相关的糖结合蛋白及与其相互作用糖链的最新研究进展,并且讨论了病变过程中糖结合蛋白异常对肿瘤进程的影响,以及其在疾病治疗策略方面的应用前景.
Natural killer (NK) cells are the prototype innate lymphoid cells endowed with potent cytolytic function that provide the first line of host defence against microbial infection and tumors. NK cells are now considered to be an important part of the immune system by controlling microbial infections and tumor progression. Although they were discovered more than 40 years ago, NK cells have recently been attracting attention for their potential in immune-based therapies. Over the past few years many researchers have reported that NK cells as one of the main effector cells of the innate immune system, their activity and function are greatly influenced by the cell surface protein glycosylation modification and glycan-binding proteins (e.g. siglec, selectin and galectin) located on the surface of cells. For example, the immune evasion mechanisms from NK immunity using cell-surface glycans have been identified. The cancer cells use the certain types of cell-surface glycans to evade NK immunity, such as reducing NK activating receptor-mediated signaling, enhancing NK inhibitory receptor-mediated signaling, and modulating TRAIL-mediated killing. In addition, such siglec interacts with sialic acid-overexpressing cells to lead to inhibition of NK cells activation. Selectin combines with ligand to promote the immune function of NK cells. Galectin binds β-galactosides to mediate NK cells immune process. This review summarizes the recent progress of the certain types of glycans and glycan-binding proteins related to the immunological function of NK cells, and discusses the influence of abnormal glycan-binding proteins for the development of tumor, as well as their application prospect in immune-based therapies.
阳佳君,刘夏薇,舒健,张坤,李铮.自然杀伤细胞免疫功能相关糖结合蛋白的研究进展[J].生物化学与生物物理进展,2017,44(5):365-376
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